KTR ROTEX ® GS product catalog

For advanced drive technology

R

ROTEX

R

Curved Jaw

ROTEX

®

GS

Zero Backlash Coupling



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R

Catalog Contents

Coupling Features and Applications

Coupling Selection

Coupling Ratings

Torque

Speed

Torsional stiffness

Radial stiffness

Standard Designs

Low-to-medium torque

Medium-to-high torque

Clamping Ring Design (6.0)

Keyless Friction Connection

Clamping Ring Design (6.0P)

DIN 69002 High Speed Spindle Drives

Keyless Friction Connection

Design DKM

Spacer Design

Compact Design

Design ZR3

Design ZR1 and ZR2

Tubular Spacer Designs

Torque Limiting Design with zero-backlash SYNTEX ®

Alignment Guidelines

Assembly Guidelines

Hub Clamping Styles and

Ordering Procedure

Part Number Selection

Page

34-35

36

37

38-39

40

41

42

43

44

45

46

47

48

49

50-51

33

ROTEX ® GS

Zero Backlash

ROTEX

®

GS Coupling Features

Technical Description

The

ROTEX

®

GS is a shaft to shaft jaw coupling assembled under preload to provide zero backlash torque transmission. The preload is accomplished by compressing the spider between the jaws of the hubs during assembly. The elastomer spider provides vibrational damping which helps avoid resonance problems. The compact design offers low mass moment of inertia and is well balanced, making it perfect for high speed applications.


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PRELOADED

ASSEMBLY

ROTEX ® GS Coupling with different clamping style hubs

1.0 - Set screw and keyway

2.5 - Double slit cross clamp w/o keyway

ROTEX

®

GS Hubs

• Precision machined from aluminum barstock

(sizes 5-38) and steel barstock (sizes 42-75)

• Tightly toleranced jaws ensure consistent preload and zero backlash torque transmission

• Inch bore sizes machined to AGMA 9002-A86 class 1 fit

Inch key sizes machined to ANSI B17.1

• Metric bore sizes machined to ISO H7 fit

Metric key sizes machined to DIN 6885 JS9

• Eight standard clamping styles (see page 49)

• Fifteen sizes with inch and metric bores up to 3.74"

ROTEX ® GS Spiders

Spiders are made from high quality urethane and hytrel ® materials. Up to four different material hardnesses are available per size allowing the stiffness of the coupling to be tuned to the drive system

• Elastomeric connection provides electrical isolation from driver to driven sides

• Center web provides stiffness and prevents deformation during shock loads and high speed operation

• Special spider materials available on request

ROTEX ® GS Spider

34

Metric catalog available: web

www.ktrcorp.com

, call

(219) 872-9100

or fax

(219) 872-9150


R

ROTEX ® GS

Zero Backlash

ROTEX

®

GS Typical Applications

Encoders, Tachometers, Resolvers...

The smaller sizes of the

ROTEX ®

GS couplings are ideal for precision feedback devices.

•

Low mass moment of inertia

•

Three piece design allows simple blind assembly

•

Elastomer provides electrical isolation

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Servo Positioning Drives...

The

ROTEX ®

GS couplings provide zero backlash torque transmission in even the most demanding positioning applications.

•

Elastomer damping can eliminate vibration problems

•

Torsional stiffness of the coupling can be optimized by using a different elastomer hardness

•

Long life due to the high quality spider and large jaw contact surface

Damping Characteristics of the

ROTEX ® GS

Main Spindle Drives...

The

ROTEX ®

GS and ROTEX

®

GS-P couplings are perfectly suited for milling, drilling and grinding spindles.

•

Precision machining provides a well balanced coupling ideal for high speed spindles

•

Elastomer dampens shock loads during interrupted cuts and torque reductions (see chart above)


www.ktrcorp.com

, call

(219) 872-9100

or fax

(219) 872-9150

35

ROTEX ® GS

Zero Backlash


R

Coupling Selection

1. Selection Formula

Rated Torque [lb in]: T

N

= 63000 x Power [HP] / Speed [RPM] Peak Torque [lb in]: T

S

= T

AS x m

A x S

A

The coupling size selected must meet two conditions: T

KN

≥ T

N x S t x S d and T

Kmax

≥ T

S x S t x S d

2. Selection Data - Ball Screw Drive Example

Driver Side Data - Servo Motor

Rated Torque (T

N

Peak Torque (TAS) = 1274 lb in

Mass Moment of Inertia (Jmot) = 956 x 10

Shaft Diameter (dm) = 1.25 in

-4

lb in sec

2

Driven Side Data - Ball Screw

Shaft Diameter (db) = 1.375 in

Mass Moment of Inertia (Jb) = 566 x 10

-4

lb in sec

Additional System Data

Temperature at 104˚ F., light shock loads, high torsional stiffness required

2

3. Safety Factors

Select temperature, torsional stiffness and shock load factors

St = 1.2

Sd = 4 SA = 1.0

Temperature Factor (St)

Temperature (F)

-22˚

/

86˚

104˚ 140˚ 176˚

St 1.0

1.2

1.4

1.8

Shock Load Factor (SA)

Light Shock Loads

Medium Shock Loads

Heavy Shock Loads

SA

1.0

1.4

1.8

Torsional Stiffness Factor (Sd)

Machine Tool Main Drives

Sd

Grinding Spindles

2-3

Drilling Spindles

2-3

Milling Spindles

2-4

Positioning Drives

Ball Screws

Belt Drives

Rack & Pinion

Sd

3-5

2-3

2-4

Encoder Drives

Sd

1000 Count 20

3600 Count

15000 Count

60

150

4. Coupling Selection

(example)

Select according to the Rated Torque (T

N

): TKN ≥ TN x St x Sd ≥ 380 x 1.2 x 4 ≥

1824 lb in

The

ROTEX

®

GS 38 (98 Sh A) 6.0 design can be selected for this example (TKN = 2876 lb in)

Calculate the peak torque of the system, however first find the values for JL and JA;

JL = (Jb + Jc/2) = (566 + 84.96) x 10

-4 lb in sec

2

=

651 x 10

-4 lb in sec

2

JA = (Jmot + Jc/2) = (956 +84.96) x 10

-4 lb in sec =

1041 x 10

-4 lb in sec

2

Calculate the value of mA: mA = JL / (JA + JL) = (651 / (1041 + 651)) x 10

-4

=

0.385

Calculate the peak torque of the system TS: TS = TAS x mA x SA = 1274 lb in x 0.385 x 1.0 =

490 lb in

36

Compare coupling maximum torque to the peak torque of the system. From the technical data table on page four, the maximum torque of the

ROTEX ®

GS 38-6.0 (98 Sh A) is 5752 lb in:

TKmax ≥ TS x St x Sd : 5752 lb in ≥ 490 lb in x 1.2 x 4 :

5752 lb in

≥

2352 lb in

Finally, using table on page 8, compare the transmittable torque of clamping ring hub 1.25 in = 2330 lb in, to maximum driving torque:

TR > TAS :

2330 lb in > 1274 lb in

A

ROTEX

®

GS 38 (98 Sh A - 6.0 design) is suitable for this application.


www.ktrcorp.com

, call

(219) 872-9100

or fax

(219) 872-9150


R

ROTEX ® GS

Zero Backlash

Coupling Ratings

R

R

1) Higher speeds can be achieved with dynamic balancing. Please consult KTR Corporation for more information.

2) Dynamic torsional stiffness at 0.5 x T

KN

Table of Terms

JA

Jc

TR

TN

TS

TKmax

Sd

System Rated Torque

System Peak Torque

Coupling Maximum Torque

Torsional Stiffness Service Factor

TAS

TKN

St

SA

Maximum Driving Torque (i.e. start up)

Coupling Nominal Torque

Temperature Service Factor

Shock Load Service Factor

Drive Side Mass Moment of Inertia

Coupling Mass Moment of Inertia

JL mA

Driven Side Mass Moment of Inertia

Drive Side Mass Moment of Inertia Factor

Transmittable Torque for Keyless Clamping Styles (2.0 / 2.5 / 6.0 / 6.0 P)


www.ktrcorp.com

, call

(219) 872-9100

or fax

(219) 872-9150

37

ROTEX ® GS

Zero Backlash

For Low to Medium Torque Applications


R

•

Zero Backlash shaft coupling for measurement and positioning drives

• Three piece - single element coupling design

•

Axial plug-in design allows simple blind-assembly

•

Compact design - low mass moment of inertia

•

Inch bore sizes machined to AGMA 9002-A86 class 1 fit


•

Metric bore sizes machined to ISO H7 fit


L t

D

H d d

H d l

1 s b

E a s l

2

ROTEX

®

GS 5-19

Aluminum Hubs

Clamping Styles (see page 49):

1.0 with keyway and set screw

1.1 without keyway, with set screw

1.2 without keyway and set screw

2.0 cross clamp (single slit) without keyway

2.1 cross clamp (single slit) with keyway t

Style 1.1

Style 1.2

t

1

Style 1.0

Style 2.0/2.1

D

K

1) The weight and mass moment of inertia shown are for couplings with maximum bore without keyway.

38

2) Please verify that the peak torque of the application does not exceed the transmittable torque for the selected coupling size and bore.

**Call KTR *See pages 50 and 51 for ROTEX ® GS part numbers


www.ktrcorp.com

, call

(219) 872-9100

or fax

(219) 872-9150


R

ROTEX ® GS

Zero Backlash

R

R

For Medium to High Torque Applications

• Zero Backlash shaft coupling for measurement and positioning drives

•

Three piece - single element coupling design

•

Axial plug-in design allows simple blind-assembly

• Compact design - low mass moment of inertia

•



•



L

L

D

H d d

H d

D

H d a d

H d

D

Clamping Styles (see page 49):

1.0 with keyway and set screw

2.5 cross clamp (double slit) without keyway

2.6 cross clamp (double slit) with keyway t t

1 a l

1 s b

E s l

2

ROTEX ®

GS 24-38

Aluminum Hubs

M l s

1 b

E s l

2

N

ROTEX ®

GS 42-75

Steel Hubs

Style 1.0

Style 2.5/2.6

D

K

1) The weight and mass moment of inertia shown are for couplings with maximum bore without keyway.

1.500


Contact KTR for availability of larger bores.

*See pages 50 and 51 for ROTEX

®

GS part numbers


www.ktrcorp.com

, call

(219) 872-9100

or fax

(219) 872-9150

39

ROTEX ® GS

Zero Backlash


R

Clamping Ring Hub - Style 6.0

•

Zero Backlash shaft coupling for spindle, elevator and machine tools drives with medium-high torque

•

Smooth running - no imbalance due to keyways or slotted clamping elements

• Frictional shaft to hub connections for high torque

•

Compact design - low mass moment of inertia

L

D

H d 3) d

H a d

3)

3) Transmittable torques are based on shaft tolerances of

0 to -0.0005 in. for shafts up to 1.5 in. in diameter

0 to -0.0010 in. for shafts larger than 1.5 in. diameter

Looser tolerances will decrease the transmittable torque l

1 s b

E s l

2

1) At high speeds diameter DH increases 0.08 for expansion of spider.

2) Jack threads of the same size are located between the clamping bolts for easy disassembly

40


Note - Steel or Nodular Iron shafts with min. yield of 36000 PSI are recommended. Hollow shafts require KTR Engineering approval.

(See KTR assembly instructions @ www.ktrcorp.com)

*See pages 49 and 50 for ROTEX

®

GS part numbers


www.ktrcorp.com

, call

(219) 872-9100

or fax

(219) 872-9150


R

ROTEX ® GS

Zero Backlash

Metric Clamping Ring Hub - Style 6.0 P (DIN 69002)

R

R

•

Zero Backlash shaft coupling for multiple head

spindle drives in machine tools

•

Smooth running - no imbalance due to keyways or slotted clamping elements

• Standard 6.0 P design can operate at v=50 m/s

(higher speeds available upon request)

• Frictional shaft to hub connections for high torque

L

D

H d

2 d H6 j5 d

H a d

3 d H6 j5 d

1 l

1 s b

E s l

2

1) Only available in standard DIN spindle shaft diameters.

2) At high speeds diameter DH increases by 2mm for expansion of spider.

3) Transmittable torque is based on a H6/j5 tolerance. If a looser tolerance is used the transmittable torque will decrease.

Note - Steel or Nodular Iron shafts with min. yield of 36000 PSI are recommended. Hollow shafts require KTR Engineering approval.

(See KTR assembly instructions at www.ktrcorp.com)


www.ktrcorp.com

, call

(219) 872-9100

or fax

(219) 872-9150

41

ROTEX ® GS

Zero Backlash


R

Style DKM

•

Zero Backlash shaft coupling with

double flexing ele-

ments for shaft to shaft connection

•

DKM insert allows the coupling to compensate for more parallel misalignment (see page 47)

• Axial plug-in design allows for blind assembly

•



•



•

See page 49 for hub clamping styles

L

DKM

N

M a d

H1 a

D d d

H d

H d

D

H l

1 s

E b s s l

11 l

12

E b s l

2

42


www.ktrcorp.com

, call

(219) 872-9100

or fax

(219) 872-9150


R

ROTEX ® GS

Zero Backlash

Compact design

● Up to 1/3 shorter than standard GS couplings

● Axial Cross-Clamp design (patent pending)

●

Designed for Ball Screw and Servo applications

●

Static Balanced for High-speeds

● Compact design for tight areas

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ROTEX ® GS 7 - 19 compact single slotted 1) design 2.0

ROTEX ® GS 24 - 38 compact axially slotted design 2.8

Size

19

24

28

38

12

14

7

9

Torque [lbin]

92Sh A 98Sh A 64Sh D d max.

10.6

26.6

44.3

17.7

44.3

79.7

21.2

53.1

106

0.28

0.35

0.47

66

89

310

841

111

150

531

1416

142

186

664

1770

0.63

0.94

1.26

1.38

1682 2876 3584 1.77

D

H

0.55

0.79

0.98

1.18

1.57

2.17

2.56

3.15

D

K

0.65

0.84

1.03

1.20

1.77

2.26

2.72

3.39

L

0.71

0.94

1.02

1.26

1.97

2.13

2.44

2.99

Dimensions [in] l

1

, l

2

E

0.20

0.28

0.28

0.37

0.67

0.71

0.83

1.02

0.31

0.39

0.47

0.51

0.63

0.71

0.79

0.94

b

0.24

0.31

0.39

0.39

0.47

0.55

0.59

0.71

s

0.04

0.04

0.04

0.06

0.08

0.08

0.10

0.10

Bores and the corresponding transmittable torques of clamping hub design 2.0/2.8

t

0.10

0.14

0.14

0.18

0.35

0.43

0.47

0.63

e

5.0

6.7

8.3

9.6

14.0

20.0

23.8

30.5

M

T

A

[lbin]

M2

M2.5

M3

3.3

6.7

11.9

M4

M6

M6

M8

25.7

88.5

88.5

221

M10 4347

7

9

12

14

19

24

28

38

0.125

0.1875

0.25

0.3125

0.375

0.500

0.625

0.750

0.875

1.000

1.125

1.250

1.375

1.500

1.625

1.750

7.965

8.850

17.70

9.735

18.59

20.36

30.98

33.63

36.29

38.06

66.38

69.92

74.34

82.31

51.33

205.3

215.1

223.9

148.7

1) ROTEX ® GS compact size 7 to 19 axially slotted on request

243.4

198.2

262.0

248.7

363.7

454.9

546.0

637.2

728.4

819.5

910.7

1001

723.0

281.4

298.2

867.3

300.0

347.8

1012

397.4

1157

446.9

1301

496.5

1445

2) Size 14 with screw M3, size 19 with screw M5

1590 1735 1879 2024

Order form:

ROTEX ® GS 38

Coupling size

Compact

Design

98 Sh A-GS

Spider

Design 2.8

Hub design

Ø 28 Design 2.8

Finish bore

Hub design

Ø 45

Finish bore


www.ktrcorp.com

, call

(219) 872-9100

or fax

(219) 872-9150

43

ROTEX ® GS

Zero Backlash


Intermediate Shaft Couplings with Aluminium Tube • Design ZR3

R

● Motion Control Coupling with Custom Intermediate shaft

● Designed for Large shaft Gaps

●

Excellent for Gantrys, Robotics, Packaging Machines, Synchronous lift units, Etc.

●

Easy Radial assembly without moving youor Drive or Driven component

● Split A-H style hubs

● Aluminum tube spacer with Low Mass Moment of Inertia

● Various bore and key combinations Inch, Metric or both

●

Keyless connections available with standard

ROTEX ®

GS hubs

● Easy spider replacement

● Standard spacers up to 13 feet without bearing support

(consult KTR for speed and size restrictions)

Size

19

24

28

38

42

48

Size

98 Sh A-GS

19

24

28

d min.

Finish bore d max.

0.31

0.39

0.55

0.71

0.87

0.87

0.79

1.10

1.50

1.77

1.97

2.17

Coupling torques

[lbin] 1)

T

KN

T

K max.

89

310

177

620

841 1682

D

H

1.57

2.17

2.56

3.15

3.74

4.13

l

1

0.98

1.18

1.38

1.77

1.97

2.20

L

1.93

2.32

2.64

3.29

3.66

4.06

l

3

0.69

0.87

0.98

1.30

1.44

1.56

E

0.63

0.71

0.79

0.94

1.02

1.10

min.

3.86

4.45

5.16

6.42

7.09

7.95

Dimensions [mm]

L

R

General max.

117

136 min.

5.24

6.18

156

155

7.13

9.02

155 9.96

154 11.06

L

ZR max.

118

138

157

157

157

157

Mass moment of intertia

[lbins 2 ]

GTShub

2)

J

1

ZR-hub

J

2

Pipe/ meter J

3

0.00018

0.00067

0.00156

0.00012

0.00040

0.00097

0.00291

0.00596

0.01061

stat. torsion spring stiffness

ZW

3)

C

2

[lbft 2 /rad]

7852

16053

28598

ROTEX ® GS

Size

98 Sh A-GS

38

42

48

T

Coupling torques

1)

KN

[lbin]

T

K max.

1682 3363

2345 4691

2744 5487 d

R

1.57

1.97

2.36

2.76

3.15

3.94

D

K

1.85

2.24

2.87

3.31

3.70

4.13

t

1

0.31

0.41

0.45

0.61

0.71

0.73

e

0.57

0.79

0.98

1.18

1.26

1.42

Capscrew

DIN EN ISO 4762

8.8

T

A

[lbin]

M 6

M 6

M 8

M 8

M10

M12

89

89

221

221

434

761

Mass moment of intertia

[lbins

2

]

GTShub

2)

J

1

ZR-hub

J

2

Pipe/ meter J

3

0.00446

0.00993

0.01655

0.00228

0.00489

0.01047

0.02630

0.04036

0.08187

stat. torsion spring stiffness

ZW

3)

C

2

[lbft

2

/rad]

70902

108759

220661

ROTEX ®

Size

GS

19

24

28

38

42

48

Bores and the corresponding transmittable friction torques of split hub without keyway [in]

0.250

0.375

0.500

0.625

0.750

0.875

1.000

1.125

1.250

1.375

1.500

1.625

1.750

1.875

2.000

2.125

119.5

178.8

238.1

298.2

357.5

178.8

238.1

298.2

357.5

416.8

477.0

437.2

546.0

655.8

764.6

873.5

983.2

1092 1202 1311

437.2

546.0

655.8

764.6

873.5

983.2

1092 1202 1311 1420 1529

1041 1214 1388 1561 1735 1908 2082 2255 2428 2602

2023 2276 2529 2782 3035 3288 3541 3794 4046 4299

1) Transmissible torque acc. to 92 Sh-A GS. The coupling is normally supplied with 98 Sh-A GS.

2) At d max.

3) intermediate shaft at L = 39.4 in with L

Rohr

= L

ZR

- 2 · L

For inquiries and orders please mention the shaft distance dimension L

R along with the maximum speed to review the critical speed.

Order form:

ROTEX ® GS 24

Coupling size

ZR3

Type

1200 mm

Shaft distance dimension

[L

R

]

98 Sh A-GS

Spider hardness

7.5

Hub design without keyway

– Ø 24 mm

Finish bore

7.5

Hub design without keyway

– Ø 24 mm

Finish bore

44


www.ktrcorp.com

, call

(219) 872-9100

or fax

(219) 872-9150


R

ROTEX ® GS

Zero Backlash

Style ZR1 / ZR2

R

R

•

Zero Backlash shaft coupling with double flexing elements for shaft to shaft connection

•

Used for applications with

extended shaft gaps

•

Z

R1 and Z

R2 couplings can operate at speeds up to 1500 rpm

•

Design ZR2 utilizes CLAMPEX ® 250 for higher transmittable torque without keyways

Style ZR1

L

ZR1

L b

D

H d s d

H s l

1

E l

2

B

L

R1 d

R

Style ZR2

D

H d d

H s l

1

L

1

E b l

2 s

B

L

ZR2 d

R

L

R2

Note: Please provide shaft gap (LR1;LR2) and maximum speed prior to obtaining pricing.

Size

Bore

Sizes

D

H l

1; l

2

L E

Dimensions [in] for ZR1 Style b s

B L

R1

14 1.18

0.43

1.38

0.51

0.39

0.06

0.45

L

R1 min.

2.56

L

ZR1 d

R

[mm]

LR1+0.87

9/16x#14

Size x

Length

Cross Clamp Bolt

Torque Ratings [lb in]

TightTransening mittable

M3x12 11.86

53.99

19

24

1.57

2.17

0.98

1.18

2.60

3.07

0.63

0.71

0.47

0.55

0.08

0.08

0.55

0.63

3.23

LR1+1.97

13/16x1/8

M6x16 92.93

3.78

LR1+2.36

1x#13

M6x20 92.93

300.90

398.25

28

38

2.56

3.15

1.38

1.77

3.54

4.49

0.79

0.94

0.59

0.71

0.10

0.12

0.69

0.83

4.37

LR1+2.76

1-3/8x5/32

M8x25 221.25

929.25

4.96

LR1+3.54

1-5/8x5/32

M8x30 221.25

1088.55

38

42

48

55

65

Size

Bore

Sizes

D

H l

1 l

3

L

1

Dimensions [in] for ZR2 Style

E b s

B

1.18

0.43

1.02

1.97

0.51

0.39

0.06

0.45

L

R2

L

R2 min.

L

ZR2 d

R

[mm]

Torsional Stiffness of Tube

[ lb ft x ft rad

[

CLAMPEX

®

KTR 250

4.29

L

R2+0.87

10x2.0

165 14

19

0.63

0.47

0.08

0.55

4.72

L

R2+1.97

12x2.0

315

24

1.57

0.98

1.02

2.64

2.17

1.18

1.50

3.39

0.71

0.55

0.08

0.63

6.14

L

R2+2.36

20x3.0

2311

28 2.56

1.38

1.77

3.94

0.79

0.59

0.10

0.69

6.97

L

R2+2.76

25x2.5

4384

3.15

1.77

1.77

3.74

1.97

2.05

4.13

2.20

2.76

4.49

5.04

6.06

0.94

1.02

1.10

0.71

0.79

0.83

0.12

0.12

0.14

4.72

2.56

3.15

6.89

5.31

2.95

3.15

7.28

1.18

1.38

0.87

0.16

1.02

0.18

0.83

0.91

0.96

1.02

1.20

7.56

L

R2+3.54

32x3.5

8.43

L

R2+3.94

40x4.0

10.28

L

R2+4.41

45x4.0

11.34

L

R2+5.12

55x4.0

15.24

L

R2+5.91

60x4.0

12507

28733

42327

81196

107384


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or fax

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45

ROTEX ® GS

Zero Backlash

with SYNTEX

®

Torque Limiter


R

• Zero Backlash torque transmission

• Simple torque adjustment even after installation

• Compact design with low mass moment of inertia

• Standard and synchronous designs

• Allows shaft misalignments

• Provides vibration damping

Coupling Torque [lb in] Dimensions [in]

Sizes

20 24

Standard

1)

Style

SYNTEX ®

Synchronous 2)

Style

DK1 DK2 SK1 SK2

ROTEX

92 Sh A

® GS

98 Sh A

Nom Max Nom Max

Max.

bore d1 d

53-177 132-266

89-310 177-575 310 620 531 1062

D

A

D

1

0.750

3.15

2.40

D

H

E L

2.17

0.70

1.77

L

G l

1 l

2 l

5

S

3.94

1.18

2.05

0.39 0.08

25 28 177-531 398-796 221-575 354-885

840 1680 1416 2832 1.000

3.85

3.07

2.56

0.79

1.97

4.45

1.38

2.28

0.43 0.08

35 38 221-708 664-1328 266-885 620-1593 1680 3360 2876 5753

1.375

4.72

3.54

2.76

0.94

2.36

5.35

1.77

2.64

0.51 0.08

50 48

531-1593 1549-2655

443-2478 1416-3540 2740 5480 4646 9293

1) Standard design reengages every 30 degrees.

1.875

6.38

4.72

3.86

1.10

2.76

6.57

2.20

3.27

0.55 0.08

2) Synchronous design reengages every 360 degrees.

Other Styles

SYNTEX ®

flange style with integrated sprocket.

SYNTEX ®

flange style with integrated HTD pulley.

46


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(219) 872-9100

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R

ROTEX ® GS

Zero Backlash

The design of the

ROTEX ®

GS coupling allows it to compensate for axial, angular, as well as parallel misalignment without causing wear on the coupling or shortening its life. Since the components are preloaded, the coupling will remain backlash free even after extended operation.

In order to assemble the

ROTEX ®

GS, ensuring long lasting performance, please review the permissible misalignment values. The values shown in the table are maximum values for couplings experiencing only one type of misalignment. For applications with both angular and parallel misalignments, the values shown in the table must be reduced. All permissible maximum misalignments given on this page take into account the following:

1) An ambient temperature of 86˚ F (30˚ C)

2) Operating speeds of 1500 rpm

Coupling Alignment

R

R

L

∆ka

Axial Misalignment is often caused by different tolerances of mating components during assembly or length changes of the shafts due to fluctuations in temperature. Since the shaft bearings can normally only tolerate light loading in the axial direction, the coupling will absorb the axial misalignment while transmitting only low reaction forces.

α

In the case of pure

Angular Misalignment, the imaginary center lines of the shafts cross. This type of misalignment can be compensated within the permitted range without any danger of large restoring forces.

∆kr

Parallel Misalignment results from the offset of the two shafts. This can be caused by varying pilot tolerances or difficulties during assembly. This type of misalignment causes the largest restoring forces and the largest loads of the mating parts.

Misalignment for the ROTEX ® GS-DKM

1) The expected axial misalignment should be added to the overall length (L) of the coupling during assembly. For dimensions please review pages 38 through 46.

In case of larger misalignments (especially large parallel misalignments) the

ROTEX ®

GS-DKM coupling should be considered to avoid excessive restoring forces by the coupling. The double flexing element design allows higher axial, angular and parallel misalignments.

Please review the table above for maximum permissible misalignments.

α

1

Axial Misalignment

∆k a

Angular Misalignment

Parallel Misalignment


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∆k r

47

ROTEX ® GS

Zero Backlash

Coupling Assembly


R

The three piece design of the

ROTEX ®

GS coupling allows the hubs to be installed on each individual shaft and then plugged axially, thus providing the following features:

• No tightening of clamping bolts inside the housing

• No inspection holes required in the housing

These design features provide the following benefits:

• Reduced assembly time

• Reduced manufacturing costs

ROTEX ®

GS Coupling Blind Assembly Feature

S

Allows electrical isolation

Since the

ROTEX ®

GS coupling is assembled under preload, a small axial force is required during assembly. This force is dependent on the size of the coupling and the hardness of the spider. This axial force could be reduced by applying a light coat of thin oil, such as Castrol 4 in 1 to the

ROTEX

®

GS spider.

E

S

Standoff Dimension "E"

In order to ensure a long life for the

ROTEX ®

GS spider, it is important that it is not assembled under axial compression. To ensure that this is not a problem, the coupling must be assembled with the proper "E" dimension. The "E" dimension given in this catalogue (varies for each size) should be viewed as the minimum value. If axial misalignment is anticipated, the coupling should be assembled with a sightly larger standoff between hubs ("E" + axial misalignment).

Small Shaft Gaps

If the shaft gap is smaller then the "E" dimension it may be possible to protrude one of the shafts into the spider. A hole with the same diameter of the shaft can be machined through the spider web, however the shaft must be smaller than the d

H diameter. If a key is present it will need to be shortened before the shaft can be inserted through the spider.

Shaft protruding into

ROTEX ®

GS spider

ROTEX ®

GS Clamping

Ring Hub 6.0

2

1

1- Clamping Hub

2- Clamping Ring

3- Clamping Bolt

3

Clamping Ring Hub 6.0 Assembly/Disassembly

The steel components of the clamping ring 6.0 hubs are lightly coated with a thin oil (for example Castrol 4 in 1). If the coupling is being reassembled, all steel surfaces and the threads should be lightly coated with oil.

Caution: Do not use lubricants containing Molybdenum Disulphide.

Assembly

• Clean and oil the shaft

• Position the hubs on the shaft

• Lightly tighten the clamping bolts

• Using a torque wrench, tighten the clamping bolts in a crosswise pattern until the tightening torque shown on page 38 is reached.

Disassembly

• Loosen all clamping bolts slightly

• Remove clamping bolts next to the jack threads

• Insert these bolts in the jack threads

• Tighten the clamping bolts in the jack threads in a crosswise pattern until the clamping ring loosens

48

Assembly instructions for all

ROTEX

®

GS couplings are available, please visit our web site

www.ktrcorp.com

or call KTR

Corporation @ 219-872-9100.


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(219) 872-9100

or fax

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R

ROTEX ® GS

Zero Backlash

Hub Clamping Styles

R

R

The

ROTEX

®

GS coupling has many different uses, so KTR has developed several clamping styles to suit each type of application. The primary difference between hub clamping styles is whether they utilize a keyway to transmit torque or use a friction connection. KTR also offers many custom clamping arrangements for specific applications such as hollow shaft tachometer and encoders.

Style 1.0 with keyway and set screw

Positive hub to shaft connection. Transmittable torque is dependent on surface pressure on the keyway only. This design is not zero backlash.

Style 1.1 without keyway, with set screw

Frictional hub to shaft connection. Useful for zero backlash torque transmission with extremely low torque.

Style 2.0 with cross clamp (single slit) without keyway

Frictional hub to shaft connection. Useful for zero backlash transmission with low torque.

Transmittable torque is dependent on bore diameter (see page 38).

Style 2.1 with cross clamp (single slit) with keyway

Positive hub to shaft with additional frictional connection. The frictional connection prevents or reduces backlash and surface pressure at keyway is reduced. Sizes 5 through 19.

Style 2.5 with cross clamp (double slit) without keyway

Frictional hub to shaft connection. Useful for zero backlash transmission with low torque.

Transmittable torque is dependent on bore diameter (see page 39).

Style 2.6 with cross clamp (double slit) with keyway

Positive hub to shaft with additional frictional connection. The frictional connection prevents or reduces backlash and surface pressure at keyway is reduced. Sizes 24 and above.

Style 6.0 clamping ring hub

Integrated frictional hub to shaft connection for high torque transmission. The clamping bolts are tightened from the elastomer side

(inside) of the hub. Transmittable torque is dependent on bore diameter (see page 40).

Style 6.0 P clamping ring hub

Same concept as 6.0 design, however this design was intended for extremely high speed drives and multiple head spindles.

See page 41 for additional details.

*See pages 50 and 51 for ROTEX ® GS part numbers

Ordering Procedure

To order the

ROTEX ®

GS coupling please follow the procedure below, fill out the form and fax it to (219) 872-9150.

1) Enter coupling size, hub and spider material

2) Enter shaft size, keyway size and clamping style (please review clamping styles above)


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49

ROTEX ® GS

Zero Backlash


R

ROTEX

®

GS Part Number

Size

80 SA Blue

92 SA Yellow

98 SA Red

64 SD-H Hytrel

Clamping

Design

007 009 012

1000003 1000003 1000003

1000001 1000001 1000001

1000002 1000002 1000002

1000025 1000025 1000025

2.0

2.0

2.0

2.0

014

1000003

1000001

1000002

1000025

2.1

2.0

019

1000003

1000001

1000002

1000025

2.1

2.5

024

1000003

1000001

1000002

1000025

2.6

2.5

028

1000003

1000001

1000002

1000025

2.6

038

1000003

042

-

048

-

055

-

065

-

1000001 1000001 1000001 1000001 -

1000002 1000002 1000002 1000002 1000070

1000025 1000005 1000005 1000005 1000005

2.6

2.6

2.6

2.6

2.6

Bore [in]

1/8

2 3/8

2 1/2

2 5/8

2 3/4

2 7/8

3 1/8

1 3/8

1 1/2

1 5/8

1 3/4

1 7/8

2

2 1/8

2 1/4

11/16

3/4

13/16

7/8

15/16

1

1 1/8

1 1/4

3/16

1/4

5/16

3/8

7/16

1/2

9/16

5/8

Stock Sizes Highlighted

7150370

7150470 7150470 7150470 7150470

7150670

OMB

7150670

7150770

7150670

7150770

7150670

7150770

7150970 7150970 7150970

7151170 7151170

7150670

7150770

7150970

7151170

7150970

7151170

7151270 7151269 7151270 7151269 7151270 7151269 7151270 7151269 7151269

7151470 7151469 7151470 7151469 7151470 7151469 7151470 7151469 7151469

7151570 7151569 7151570 7151569 7151570 7151669 7151570 7151569 7151569

7151770 7151769 7151770 7151769 7151770 7151769 7151769

7151970 7151969 7151970 7151969 7151970 7151969 7151969 5051969

7152070 7152069 7152070 7152069 7152069 5052069

7152270 7152269 7152270 7152269 7152269 5052269

7152370 7152369 7152370 7152369 7152369 5052369

7152570 7152569 7152570 7152569 7152569 5052569 5052569

7152870 7152869 7152869 5052869 5052869 5052869

7153170 7153169 7153169 5053169 5053169 5053169

7153470 7153469 7153469 5053469 5053469 5053469 5053469

7153870 7153869 7153869 5053869 5053869 5053869 5053869

7154169 5054169 5054169 5054169 5054169

7154469 5054469 5054469 5054469 5054469

5054769 5054769 5054769

5055069 5055069 5055069

5055369 5055369

5055769 5055769

5056069 5056069

5056369 5056369

5056669

5056969

Size

Clamping

Design

Bore [in]

1/4

2 1/8

2 1/4

2 3/8

2 1/2

2 5/8

2 3/4

1 1/4

1 3/8

1 1/2

1 5/8

1 3/4

1 7/8

2

5/16

3/8

7/16

1/2

5/8

3/4

7/8

1

1 1/8

50

014

6.0

019

6.0

024

6.0

028

6.0

038

6.0

042

6.0

048

6.0

055

6.0

065

6.0

For Inch Sizes, Call KTR For Availability

0150681

0150781

0150981 0150981 0150981

0151181 0151181 0151181

0151281 0151281 0151281

0151581 0151581 0151581 0151581

0151981 0151981 0151981 0151981

0152281 0152281 0152281 5052281

0152581 0152581 0152581 5052581 5052581

0152881 0152881 5052881 5052881

0153181 0153181 5053181 5053181 5053181

0153481 0153481 5053481 5053481 5053481

0153881 0153881 5053881 5053881 5053881 5053881

0154181 5054181 5054181 5054181 5054181

0154481 5054481 5054481 5054481 5054481

5054781 5054781 5054781 5054781

5055081 5055081 5055081 5055081

5055381 5055381 5055381

5055781 5055781

5056081 5056081

5056381 5056381

5056681 5056681

For ordering, select the product code, size, bore or Spider number above.

Product Code:

Product Code

BA55

ROTEX

Size

019

5056981 5056981


www.ktrcorp.com

, call

(219) 872-9100

or fax

(219) 872-9150

®

GS: BA55

Part Number

7150770


R

ROTEX ® GS

Zero Backlash

ROTEX

®

GS Part Number Selection

R

R

Size

80 SA Blue

92 SA Yellow

98 SA Red

30

32

35

22

24

25

28

18

19

20

12

14

15

16

50

55

60

65

38

40

42

45

48

68

70

64 SD-H Hytrel

Clamping

Design

Bore [mm]

3

4

9

10

11

7

8

5

6

007 009 012

1000003 1000003 1000003

1000001 1000001 1000001

1000002 1000002 1000002

1000025 1000025 1000025

2.0

2.0

2.0

2.0

014

1000003

1000001

1000002

1000025

2.1

2.0

019

1000003

1000001

1000002

1000025

2.1

2.5

024

1000003

1000001

1000002

1000025

2.6

2.5

028

1000003

1000001

1000002

1000025

2.6

038

1000003

2.6

042

-

2.6

048

-

2.6

055

-

1000001 1000001 1000001 1000001

2.6

065

-

-

1000002 1000002 1000002 1000002 1000070

1000025 1000005 1000005 1000005 1000005

2.6

Stock Sizes Highlighted Below

7150350

7150450 7150450 7150450

7150550 7150550 7150550 7150550 7150549

7150650 7150650 7150650 7150650 7150649 7150650 7150649

7150750 7150750 7150750 7150750 7150749 7150750 7150749

7150850 7150850 7150850 7150849 7150850 7150849 7150850 7150849

7150950 7150950 7150950 7150949 7150950 7150949 7150950 7150949

7151050 7151050 7151050 7151049 7151050 7151049 7151050 7151049 7151050 7151049

7151150 7151150 7151149 7151150 7151149 7151150 7151149 7151150 7151149

7151250 7151250 7151249 7151250 7151249 7151250 7151249 7151250 7151249 7151249

7151450 7151449 7151450 7151449 7151450 7151449 7151450 7151449 7151449 5051449

7151550 7151549 7151550 7151549 7151550 7151549 7151550 7151549 7151549 5051549 5051549

7151650 7151649 7151650 7151649 7151650 7151649 7151650 7151649 7151649 5051649 5051649

7151850 7151849 7151850 7151849 7151850 7151849 7151849 5051849 5051849

7151950 7151949 7151950 7151949 7151950 7151949 7151949 5051949 5051949

7152050 7152049 7152050 7152049 7152050 7152049 7152049 5052049 5052049 5052049

7152250 7152249 7152250 7152249 7152249 5052249 5052249 5052249 5052249

7152450 7152449 7152449 7152450 7152449 5052449 5052449 5052449 5052449

7152550 7152549 7152549 7152550 7152549 5052549 5052549 5052549 5052549

7152850 7152849 7152849 7152850 7152849 5052849 5052849 5052849 5052849

7153049 7153049 7153049 5053049 5053049 5053049 5053049

7153249 7153249 7153249 5053249 5053249 5053249 5053249

7153549 7153549 7153549 5053549 5053549 5053549 5053549

7153849 7153849 7153849 5053849 5053849 5053849 5053849

7154049 5054049 5054049 5054049 5054049

7154249 5054249 5054249 5054249 5054249

7154549 5054549 5054549 5054549 5054549

5054849 5054849 5054849 5054849

5055049 5055049 5055049 5055049

5055549 5055549 5055549

5056049 5056049

5056549 5056549

5056849 5056849

5057049

Size

Clamping

Design

014

6.0

019

6.0

024

6.0

028

6.0

038

6.0

042

6.0

048

6.0

055

6.0

065

6.0

Bore [mm]

6

16

18

19

20

10

11

14

15

22

24

25

28

30

42

45

48

50

32

35

38

40

55

60

0150680

0151080 0151080

0151180 0151180 0151180

0151480 0151480 0151480

0151580

0151680

0151880

0151980

0152080

0151580

0151680

0151880

0151980

0152080

0152280

0152480

0152580

0152880

Stock Sizes Highlighted Below

0151680

0151880

0151980

0152080

0152280

0152480

0152580

0152880

0153080

0153280

0153580

0153880

0151680

0151880

0151980

0152080

0152280

0152480

0152580

0152880

0153080

0153280

0153580

0153880

0154080

0154280

0154580

0154880

0155080

5052080

5052280

5052480

5052580

5052880

5053080

5053280

5053580

5053880

5054080

5054280

5054580

5054880

5055080

5052880

5053080

5053280

5053580

5053880

5054080

5054280

5054580

5054880

5055080

5055580

5053280

5053580

5053880

5054080

5054280

5054580

5054880

5055080

5055580

5056080

5053880

5054080

5054280

5054580

5054880

5055080

5055580

5056080

For ordering, select the product code, size, bore or Spider number above.

Product Code:

Product Code

BA55

ROTEX

Size

019


www.ktrcorp.com

, call

(219) 872-9100

or fax

(219) 872-9150

®

GS: BA55

Part Number

7150749

51

52

www.ktrcorp.com


R

TOOLFLEX

®

Zero-Backlash

Metal Bellows Couplings

Catalog Contents

Coupling Features and Applications

Page

76

Coupling Selection

Style M Coupling

Style S Coupling

Short Design

Style Mini Coupling

Style KN Coupling

80

81

77

78

79

75

TOOLFLEX

®

Zero-Backlash Bellows Couplings

Zero-Backlash, torsionally Stiff and Maintenance-Free

TOOLFLEX

®

is a zero-backlash torsionally stiff

“Bellows style” coupling for applications where extreme stiffness is required. It permits excellent compensation for all types of misalignment (axial, radial and angular) in addition to fast, easy assembly.


R

Examples of applications:

Machine tools, linear actuators (high-pitch ball screws), indexing tables and low reduction planetary gearboxes perform well with the KTR TOOLFLEX

®

.

Brass Ring Bellows Connection:

• Brass rings secure the stainless steel bellow to the aluminum hubs creating a non-slip zero-backlash connection

• Insures uniform torque transmission from the bellow to the hub in any direction

• Resistant to fatigue and failure in all styles of operating conditions including temperatures up to

280°C (536°F)

Cross-Clamped Hubs

• Double-Slit Cross-Clamped hubs reduce deformation of the bellow during tightening

• Easy access clamping bolt allow for fast assembly

• Custom bore tolerance allows quick positioning on shafts

76

Double-Slit Cross-Clamped Hub


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TOOLFLEX

®



R


Normally the TOOLFLEX ® is selected according to nominal torque (TKN) shown in the technical specifications list, just like most couplings. In any case the nominal torque (TKN) should never exceed the maximum torque of the application. This is critical when using servo motors because acceleration torques can easily exceed the nominal torque (TKN) of the coupling significantly.

T

T

AS

KN

Pmax

[Nm] = 9550 · –––– n

[Nm]

≥

> T

AS

/

LS

· f

P max n f

T

AS

T

LS

= max. motor performance [kW]

= motor speed [min

-1

]

= peak torque of the motor [Nm]

= peak torque of load side [Nm]

= safety factor f = 1.5 with uniform loading, f = 2 with moderate shock load, f = 2.5 - 4 with high shock load

For drives in machine tools (servo motors) min. f values of 1.5 - 2 must be used.

When selecting servo motors, the calculations should be made with the torque values of the motor suppliers and not with P max

.

When dimensioning the coupling, please use the respective data of the manufacturer considering the servo controller to be used.

Accelerating torque

(drive side / load side)

T

KN

> T

S

T

S

=

T

AS

· m

A

· k m

A

J

L

J

A

+ J

L

T

S

=

T

LS

· m

L

· k m

L

J

A

J

A

+ J

L

T

S m

A m

L

J

A

J

L

= accelerating torque

(drive or driven side)

= drive-side shock

= driven-side shock

= moment of inertia of the drive side

= moment of inertia of the drive side

Torsional Stiffness

Transmission error of the metal bellow due to torsional strain ϕ

180 · T

π

· C

AS

T ϕ

C

T

= torsion angle [degrees]

= torsion stiffness of the coupling

[Nm/rad]

Natural Frequency

The natural frequency of the coupling must be above or below the frequency of the unit. Valid for the mechanical spare model of the 2-mass-system:

ω

K

1 J

= –––––– C

T

J

L

L

+ J

· J

A

A

[Hz]

Valid in practice:

ω

K

> 2

·

ω e

ω

K

ω e

= frequency of the 2-mass-system [s

-1

]

= exciting frequency of the drive [s

-1

]

Note:

When operating torque of the application exceeds nominal (T

KN

), only limited alternating loads can be tolerated. When this occurs, deformation and fatigue fracture of the bellow can occur.


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, call

(219) 872-9100

or fax

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77

TOOLFLEX

®


Style M



R

• Zero-backlash / Torsionally-stiff

• High-strength brass ring bellow connection

• Frictional or Keyed Double-slit Cross-Clamping Hubs

• Maintenance Free

• Temperatures up to 280°C (536°F)

• Corrosion Resistant Stainless Steel Bellow and Aluminum Hubs

• Perfect for servo applications

Keyway acc to inch or metric stds.

Thread M1

Clamping Bolt

Dimensions [mm]

TOOLFLEX ®

Size

16

20

30

38

45 dmin.

5

8

10

14

14

Finish Bore dmax.

16

20

30

38

45

L

46

62

72

81

103 l

1

; l

2

17.0

21.5

23.0

25.5

32.0

General

E

16

19

26

30

39

D

H

30

40

55

65

83

M

1

M3

M5

M6

M8

M10

D

3

32.2

43.5

57.7

74.3

88.9

Clamping Bolts t

1

7

9

4

6

11 e

1

11.5

14.5

19

25

30

Tightning

Torque

[Nm]

1.9

8.5

14

35

49

TOOLFLEX ®

Size

16

20

30

38

45

Torque

Rating

[Nm]

T

KN

5

15

35

65

150

Moment of inertia

[10 -6 kgm 2 ]

7

31

117

254

1011

Torsional stiffness

[Nm/rad]

3050

6640

14760

24920

64000

Axial spring

Dimensions [mm]

Radial spring Permissible misalignment stiffness

[N/mm] stiffness

[N/mm]

Axial

[mm]

Radial

[mm]

Angular

[degrees]

26.0

27.5

36.0

36.2

88.0

92

126

155

212

492

±0.3

±0.4

±0.5

±0.6

±0.9

0.09

0.10

0.10

0.15

0.25

1.5

1.5

2.0

2.0

2.0

Masse

[10 -3 kg]

61

144

306

448

1125

Tightning

Torque

[Nm]

1.9

8.5

14

35

49

TOOLFLEX ®

Size

16

20

30

38

Bore range and respective torque values of frictional connection of the clamping hub [Nm]

Ø3 Ø4 Ø5 Ø6 Ø7 Ø8 Ø9 Ø10 Ø11 Ø12 Ø14 Ø15 Ø16 Ø18 Ø19 Ø20 Ø24 Ø25 Ø28 Ø30 Ø32 Ø35 Ø38 Ø40 Ø42

4.3

4.5

4.6

4.8

5.0

5.1

17.6

5.3

18.1

5.5

18.6

5.6

19

5.8

19.5

6.1

20.5

6.3

21

6.5

21.4

22.4

22.9

23.3

33 34 35 36 36.4

38

84

38.5

85

39

87

42

92

42,5

93

44,5

97

46

99 101 105 109

45 157 165 167 173 177 181 187 193 197 200

Inch Bores Available

Note:

The nominal torque (T

KN

) of the coupling selected must exceed the maximum operating torque of the application (acceleration or peak torque). When operating torque of the application exceeds nominal (T

KN

), only limited alternating loads can be tolerated. When this occurs, deformation and fatigue fracture of the bellow can occur.

78


www.ktrcorp.com

, call

(219) 872-9100

or fax

(219) 872-9150

TOOLFLEX

®


Style S



R

• Compact Short Design

• Zero-backlash / Torsionally-stiff

• High-strength brass ring bellow connection

• Frictional or Keyed Double-slit Cross-Clamping Hubs

• Maintenance Free

• Temperatures up to 280°C (536°F)

• Corrosion Resistant Stainless Steel Bellow and Aluminum Hubs

• Perfect for servo applications

Feather keyway acc. to

DIN 6885 optionally Thread M1

G (DIN EN ISO 4762)

Dimensions [mm]

TOOLFLEX ®

Size

16

20

30

38

45

Finish bore dmin.

3

8

11

18

22 dmax.

16

20

30

38

45

L

45

55

63

69

86,5 l1; l2

17,0

21,5

23,0

25,5

32,0

General

E

11

12

17

18

22,5

DH

32

40

55

65

83

M1

M4

M5

M6

M8

M10

D3

35,0

43,5

58,0

72,6

89,0

Clamping screws t1

7

9

5

6

11 e1

12,0

14,5

19

25

30

TA

[Nm]

2,5

6

10

25

49

TOOLFLEX ®

Size

16

20

30

Torque

[Nm]

TKN

5

15

35

Speed

[min-1] n 1)

14920

11940

8680

Moment of inertia 2)

[x10-6kgm2]

10

30

114

Torsional stiffness

[Nm/rad]

4500

9600

17800

38 65 7345 243

37400

45 150 5750

933 95800

1) With v= 25 m/s

2) Figures refer to the complete coupling with max. bores

Axial spring stiffness

[N/mm]

43

63

97

108

132

Technical data

Radial spring stiffness

[N/mm]

Axial

[mm]

138

189

233

318

738

±0,3

±0,4

±0,5

±0,6

±0,9

Info:

Torques of frictional engagement of the clamping hub shown under Style M (page 78)

Perm. displacements

Radial

[mm]

0,07

0,08

0,10

0,12

0,18

Angular

[degrees]

1,0

1,0

1,5

1,5

Mass 2)

[x10-3kg]

61

121

243

351

1,5 824

Inch Bores Available

Other designs: Style for FANUC-Motors

Style KN

For further information, see

www.ktrcorp.com

Order form:

TOOLFLEX ® S 30

Coupling size d1 - Ø25

Finish bore

Component 1 d2 - Ø30

Finish bore

Component 2


www.ktrcorp.com

, call

(219) 872-9100

or fax

(219) 872-9150

79

TOOLFLEX

®

Metal bellows-type couplings


Miniature couplings


● For motion control applications

●

Zero-backlash, torsionally stiff

●

Maintenance-free

● Low mass moment of inertia

● Easy assembly with clamping or set screw hubs

●

Temperature range - 22° F to + 212° F

●

Inch and metric bores available

R

TOOLFLEX

®

Torque

Finish bore

Size Design

1/2)

T

KN

[Nm] d min.

5

7

9

12

M

S

M

S

M

S

M

S

0,1

1,0

1,5

2,0

2

3

4

5

Circumferential speed v max

= 25 m/s d max.

5

8

10

14

D

H

10

15

20

25

Technical data of type with fixing screw (type 1.1)

Dimensions [mm]

General

L

15 1)

17

2)

18 1)

20

2)

21 1)

24

2)

27,5

1)

31 2) l

1

; l

6

7

8

11

2

M

M2

M3

M3

M4

Fixing screw t number

3) z

1,8

2,0

2,5

2,5

1

1

2

2

Perm. displacements

Axial

[mm]

0,30

0,40

0,30

0,40

0,35

0,50

0,40

0,60

Radial

[mm]

0,10

0,15

0,10

0,15

0,15

0,20

0,15

0,20

Angular

[degrees]

0,7

1,0

0,7

1,0

1,0

1,5

1,0

1,5

Torsional

Weight stiffness

4)

[Nm/rad]

97

75

390

300

750

580

1270

980

[kg]

0,0027

0,003

0,005

0,006

0,010

0,011

0,017

0,019

TOOLFLEX

®

Size

7

9

12

Design 1/2)

S

M

S

M

S

M

Torque

T

KN

[Nm]

1,0

1,5

2,0

Finish bore d min.

3

3

4 d max.

7

9

12

D

H

15

20

25

General

Technical data of type with clamping screw (type. 2.5)

Dimensions [mm]

Perm. displacements

Clamping screw

L

1 l

3

; l

4

M

1 t

1 e

D

K

T

A

[Nm]

Axial

[mm]

Radial

[mm]

Angular

[degrees]

0,3 0,1 0,7 24 1)

26

2)

30 1)

33

2)

34,5 1)

38

2)

9

11

13

M2

M2,5

M3

3,2

3,5

4,0

5,0

7,1

8,5

16,5

21,5

26,5

0,37

0,76

1,34

0,4

0,35

0,5

0,4

0,6

0,15

0,15

0,2

0,15

0,2

1,0

1,0

1,5

1,0

1,5

Torsional Weight 4) stiffness

[Nm/rad]

390

300

750

580

1270

980

[kg]

0,007

0,008

0,014

0,015

0,025

0,027

1) Design S = 4 shafts 2) Design M = 6 shafts

4) Figures refer to the complete coupling with max. bores

Circumferential speed vmax= 20 m/s

3) Quantity each hub, from size 9: 2x120° offset

Note:

The coupling must be selected in a way that the nominal torque exceeds the maximum torque to be transmitted (accelerating or peak torque).

In case of values exceeding TKN (collision, trouble) only limited alternating load figures are possible. In this torque range there can be permanent deformation of the bellow and fatigue fractures can occur.

Order form:

TOOLFLEX ® Type 1.1

TOOLFLEX ® Type 2.5

TOOLFLEX ® 7 M

Coupling size

2.5

Hub design d - Ø4

Finish bore component 1

2.5

Hub design d - Ø6


80


www.ktrcorp.com

, call

(219) 872-9100

or fax

(219) 872-9150

TOOLFLEX

®

Metal bellows-type couplings

Type KN



R

●

Zero-backlash-free, torsionally stiff

●

Rigid bellow-hub connection

● High-torque capacity keyless connection

● Maintenance-free

●

Designed for high-speed applications

TOOLFLEX ® S-KN

TOOLFLEX

®

Size

Torque

30

38

45

55 3)

T

KN

[Nm]

35

65

150

340

Dimensions [mm] d

Finish bore min.

12

12

15

15 d max.

22

28

40

56

4 shafts

1)

L

6 shafts

2)

L ges.

4 shafts

1)

6 shafts

2)

48

56

74,5

95,5

57

68

91

109

54

63

82,5

106

63

75

99

120 l

1

; l

2

22

26

34

40

D

H

50

60,5

82

97

D

1

43

52

68

95

D

2

47

56

77

95

M4

M5

M6

M8

M

Clamping screw

T

A

[Nm]

Number z

2,9

6

14

35

12

12

12

12

M

1

Pull-off threads

Number z

T

A1

4)

[Nm]

M4

M5

M6

M8

6

6

6

6

1,2

1,4

3

6

TOOLFLEX

®

Size

30

38

45

55

3)

Ø12

37

52

Ø14

50

Bore range d and the corresponding transmittable torques T

R of frictional engagement of the clamping hub [Nm]

Ø15

58

Ø16

66

Ø19

71

Ø20

79

Ø24 Ø25 Ø28 Ø30 Ø32 Ø35 Ø38 Ø40 Ø42 Ø45 Ø48 Ø50 Ø55

71 81 92

113 130 147

174

130

208

198 279

103

230

309

149

332

445

161

230

483

202

288

606

331

696

376

792

451

585

531

690

589

764 843 967 1101 1194 1445

Ø56

1498

1) Design S = 4 shafts 2) Design M = 6 shafts 3) Hubs from steel welded with bellow

4) After assembly of the clamping screws (M) tighten the pull-off thread (M1) to the torque TA1 indicated.

Other designs: TOOLFLEX ® KN for FANUC engines

Order form:

TOOLFLEX ® 38 S-KN

Coupling size d

1

- Ø15

Finish bore component 1 d

2

- Ø22



www.ktrcorp.com

, call

(219) 872-9100

or fax

(219) 872-9150

81

RADEX

®

-NC

Coupling Features


R

The

NEW RADEX ®

-NC steel disk servo-motor couplings were designed specifically for the motion control technology, which requires not only zero-backlash torque transmission, but high torsional stiffness.

Application Examples

Indexing table, planetary or worm gears with low transmission for highly precise positioning, ball screws with large diameters and/or low ratio pitch.

High Temperature Resistance

The all steel style can be used in temperatures up to 535˚ F.

Backlash Free

Special shoulder bolts along with a strong

frictional connection between the disk pack bushing and hub flanges allow the coupling to transmit torque with zero-backlash.

Maintenance Free

The stainless steel disk packs require no lubrication allowing the coupling to be completely maintenance free

Finite Element Analysis (F.E.A.)

Through FEA, we have been able to analyze and re-design the RADEX

®

-NC thin layered disk packets to reduce high stress points and optimize performance.

Misalignment Capabilities

The thin layered disk packets of the RADEX

® -NC

compensate axial, angular and parallel misalignment producing low restoring forces, therefore increasing the lifetime of adjacent support bearings.

Aluminum Hubs and Spacers

The RADEX

®

-NC hubs and spacers are precisely machined from high quality aluminum bar stock. As a result there are low mass

moments of inertia, which is highly beneficial for the dynamic characteristics of the entire drive system.

Comparison of Mass Moment of Inertia

Frictionally Engaged Cross Clamped Hubs

All RADEX

®

-NC hubs are manufactured with a cross clamped style hub for frictionally engaged torque transmission. This design satisfies the need of continuous reversing applications for the motion control industry.

Cross clamped RADEX

®

-NC hub


www.ktrcorp.com

, call

(219) 872-9100

or fax

(219) 872-9150

115

RADEX

®

-NC

Servo Motor Couplings


R

• Zero-Backlash torque transmission for precision drives

• High torsional stiffness

• Zero-Backlash cross clamped hubs

• Low mass moment of inertia

• High speed capability

• Operating temperatures up to 535˚ F

Style DK Style EK

Size

10

T

KN

[lb in]

Technical Data

T

Kmax

[lb in]

Max. Speed

[rpm]

66 132 20000

Torsional

Stiffness

[lb in / rad]

1)

Misalignment Style DK

Parallel

[in]

Axial

[in]

Angular

[degree]

49560 0.005

0.031

1

Misalignment Style EK

Parallel

[in]

Axial

[in]

Angular

[degree]

0.016

1

15

20

177

265

354

531

16000

12000

106200 0.006

0.010

0.039

0.047

1

1 -

0.020

0.024

1

1

265500

25 531 1062 10000

531000

0.012

0.063

1 0.031

1

35

1) EK design

885 1770 9000

637200

0.016

0.079

1 0.039

1

116

Size

Max.

d

1

; d

2

10

D

A

0.563

1.38

15

0.750

1.85

20

1.000

2.32

25

1.500

2.76

35 l

1

; l

2

0.63

0.83

0.94

1.26

Dimensions [in]

L

DK

E

DK

1.73

2.17

2.68

3.46

0.47

0.51

0.79

0.94

L

EK

1.38

1.77

2.09

2.72

s

0.12

0.12

0.20

0.20

t

0.20

0.27

0.26

0.35

Cross Bolt

Size

M4

M6

M6

M8

Torque

[lb in]

26

88

88

221

Mass Moment of Inertia

DK

[lb in s

2

]

0.0001239

0.0004779

0.0016815

0.0040710

EK

[lb in s

2

]

0.0000885

0.0003540

0.0013275

0.0030975

1.563

3.31

1.38

3.86

1.10

3.03

0.28

0.41

M10 433

0.0088500

0.0070800

Inch Bore Available


www.ktrcorp.com

, call

(219) 872-9100

or fax

(219) 872-9150

RADEX

®

-NC

Selection Procedure


R

1. Drives without periodic torsional vibrations:

For example, centrifugal pumps, fans, screw compressors, etc. The coupling selection requires that the nominal torque T torque T

Kmax are checked.

KN and the maximum

1.1 Loading due to nominal torque:

The nominal torque of the coupling T

KN must be larger than or equal to the nominal torque of the system T

N multiplied by the operating service factor S

B

.

T

KN

> T

N x S

B

2. Drives with periodic torsional vibrations:

For example, piston compressors, combustion engines, piston pumps, generators, etc. For these types of applications, a torsional vibration analysis is required. Please consult KTR.

2.1 Loading due to nominal torque:

The nominal torque of the coupling T

KN must be larger than or equal to the nominal torque of the system T

N multiplied by the operating service factor S

B

.

T

KN

> T

N x S

B

1.1 Loading due to spike loads:

The maximum torque T

Kmax of the coupling must be larger than or equal to the sum of the peak torque T

S and the nominal torque T

N of the system.

This is valid when a shock load is superimposed on the nominal torque of the system (for example motor starting).

For drives with AC motors and large mass moment of inertia on the load side, KTR recommends a calculation of the start up torque with our simulation program. Consult KTR for this free service.

T

Kmax

> (T

N

+ T

S

)

Table of Terms:

Term

Nominal coupling torque

Abbreviation

T

KN

2.2 Passing through resonance:

The peak torque T through resonance cannot exceed the maximum torque of the coupling T

T

SR

Kmax experienced while passing

Kmax

> T

SR

2.3 Loading due to alternating torque:

The alternating torque of the coupling T

KW cannot be exceeded by the alternating torque of the system T

W

.

T

KW

> T

W

.

Definition

Torque that can be transmitted continuously throughout the entire coupling speed range

Maximum coupling torque T

Kmax

Alternating coupling torque T

KW

Torque to be transmitted 1x10

5 occurences of peak load or 0.5x10

4 occurences of alternating load during the entire life of the coupling

The maximum amplitude of an alternating torque with a frequency of 10 H

Z and a base load of T

KN .

Operating Service Factors:

Application S

B

Agitators

Centrifugal Pumps

Woodworking Machinery

Mixers / Extruders

Elevators

Crushers

Piston Pumps

1 - 2

1.5

1.5

2

2

2.5

2.5

Application

Generators

Rotary Screw Compressors

Calenders

Construction Machinery

Textile Machinery

Grinders

Rolling Mills

S

B

1

1.5

2

2

2

2.5

2.5

Application

Packaging Machinery

Fans / Blowers / Centrifuges

Machine Tools

Conveyor Belts

Turbo Compressors

Piston Compressors

Presses

S

B

1

1.5

2

2

2

2.5

2.5

Order form for RADEX ® -NC:


www.ktrcorp.com

, call

(219) 872-9100

or fax

(219) 872-9150

117

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