KTR RUFLEX torque limiter Operating/Mounting Instructions

The KTR RUFLEX torque limiter is an overload protection system designed to prevent damage to drive train components. It operates as a frictionally engaged connection, allowing for controlled slippage when excessive torque is applied, safeguarding equipment from breakdowns. Ideal for applications requiring precise torque control and overload protection, such as conveyors, machinery, and rotating shafts.

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KTR Kupplungstechnik
GmbH
D-48407 Rheine
RUFLEX&reg;-torque limiter
with clampable setting nut
Operating-/Assembly Instructions
KTR-N
sheet:
edition:
46011 EN
1 of 8
5
RUFLEX&reg;
with clampable setting nut
The RUFLEX&reg;-torque limiter is an overload system which operates as frictionally engaged
connection. It protects the following components in the drive lane against destruction.
Table of Contents
1
Technical Data
2
Hints
2.1
2.2
2.3
2.4
2.5
General Hints
Safety and Advice Hints
General Hints to Danger
Proper Use
Hint Regarding the Finish Bore
3
Storage
4
Assembly
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
Components RUFLEX&reg;-Torque Limiter
Assembly (General)
Centering Slide Bush
Disc Spring Layer
Initial Adjustment or New Adjustment of the Slipping Torque
Modification of Slipping Torque
Diagrams of Adjustment
Spares Inventory, Customer Service Addresses
Schutzvermerk
ISO 16016 beachten.
Gezeichnet:
Gepr&uuml;ft:
24.06.10 Li/Lm
24.06.10 Li
Ersatz f&uuml;r:
Ersetzt durch:
KTR-N vom 30.03.07
KTR Kupplungstechnik
GmbH
D-48407 Rheine
RUFLEX&reg;-torque limiter
with clampable setting nut
Operating-/Assembly Instructions
KTR-N
sheet:
edition:
46011 EN
2 of 8
5
1 Technical Data
picture 1: dimensions
Table 1:
Size
0
01
1
2
3
4
5
Max.
speed
[1/min]
8500
6600
5600
4300
3300
2700
2200
d2
max.
1)
20
22
25
35
45
55
65
2)
B
8,5
16
17
19
21
23
29
DN
D2
d1
45
40
45
58
75
90
102
45
58
68
88
115
140
170
35
40
44
58
72
85
98
1) Finish bore larger than &Oslash;19, keyway to DIN 6885 sheet 3
Dimensions [mm]
b1
s1
min. max.
2
6
2,5
3
8
3
3
10
3
4
12
3
5
15
4
6
18
4
8
20
5
LR
33
45
52
57
68
78
92
Threads for setcrews
M
g
M4
3
M5
4
M5
5
M6
5
M6
5
M8
5
M8
8
2) bore tolerance (drive component):
F8 at size 0 - 4
H8 at size 5
2 Hints
2.1 General Hints
Please read through these mounting instructions carefully before you set the torque limiter into operation. Please
pay special attention to the safety instructions!
The mounting instructions are part of your product. Please keep them carefully and close to the torque limiter.
The copyright for these mounting instructions remains with KTR Kupplungstechnik GmbH.
2.2 Safety and Advice Hints
STOP
DANGER!
Danger of injury to persons.
!
CAUTION!
Damages on the machine possible.
ATTENTION!
Pointing to important items.
)
Schutzvermerk
ISO 16016 beachten.
Gezeichnet:
Gepr&uuml;ft:
24.06.10 Li/Lm
24.06.10 Li
Ersatz f&uuml;r:
Ersetzt durch:
KTR-N vom 30.03.07
KTR Kupplungstechnik
GmbH
D-48407 Rheine
RUFLEX&reg;-torque limiter
with clampable setting nut
Operating-/Assembly Instructions
KTR-N
sheet:
edition:
46011 EN
3 of 8
5
2 Hints
2.3 General Hints to Danger
STOP
DANGER!
With assembly, operation and maintenance of the torque limiter it has to be made sure that
the entire drive train is secured against unintentional engagement. You can be seriously
hurt by rotating parts. Please make absolutely sure to read through and observe the
following safety instructions.
• All operations on and with the torque limiter have to be performed taking into account &quot;safety first&quot;.
• Please make sure to disengage the drive unit and the power packs in service before you perform your work.
• Secure the drive unit against unintentional engagement, e. g. by providing hints at the place of engagement or
removing the fuse for current supply.
• Do not touch the operation area of the torque limiter as long as it is in operation.
• Please secure the torque limiter against unintentional touch. Please arrange for the corresponding protection
devices and caps.
2.4 Proper Use
You may only assemble, operate and maintain the torque limiter if you
• have carefully read through the mounting instructions and understood them
• had technical training
• are authorized to do so by your company
&reg;
The torque limiter may only be used in accordance with the technical data (see RUFLEX -catalogue).
Unauthorized modifications on the torque limiter design are not admissible. We do not take any warranty for
resulting damages. To further develop the product we reserve the right for technical modifications.
&reg;
The RUFLEX described in here corresponds to the technical status at the time of printing of these mounting
instructions.
2.5 Hint regarding the Finish Bore
STOP
DANGER!
The maximum permissible bore diameters d2 (see
table 1 in chapter 1 - Technical Data) must not be
exceeded. If these figures are disregarded, the
coupling may tear. Rotating particles may cause
serious danger.
• Hub bores machined by the customer have to observe
concentric running or axial running, respectively (see
picture 2).
• Please make absolutely sure to observe the figures
for dmax.
• Carefully align the hubs when the finish bores are
brought in.
• Please provide for a setscrew or an end plate for the
axial fastening of the hubs.
!
picture 2: concentric running and axial running
CAUTION!
The orderer is responsible for all subsequently made machinings to unbored or pilot bored
and to finish machined coupling parts and spare parts. KTR does not assume any warranty
claims resulting from insufficient refinish.
Schutzvermerk
ISO 16016 beachten.
Gezeichnet:
Gepr&uuml;ft:
24.06.10 Li/Lm
24.06.10 Li
Ersatz f&uuml;r:
Ersetzt durch:
KTR-N vom 30.03.07
KTR Kupplungstechnik
GmbH
D-48407 Rheine
RUFLEX&reg;-torque limiter
with clampable setting nut
Operating-/Assembly Instructions
KTR-N
sheet:
edition:
46011 EN
4 of 8
5
3 Storage
The couplings are supplied in preserved condition and can be stored at a dry and roofed place for 6 - 9 months.
CAUTION!
Humid storage rooms are not suitable.
Please make sure that there is no condensation. The best relative air humidity is under 65%.
!
4 Assembly
The RUFLEX&reg;-torque limiter is delivered in assembled condition.
4.1 Components RUFLEX&reg;-Torque Limiter
Component
1
2
3
4
Quantity
1
1
1
1
Designation
Hub
Pressure ring
Clampable setting nut
Clamping screw
5
s. table 3
Disc spring
Component
6
7
Quantity
2
1
8
1
9
1
Designation
Friction lining
Slide bush
Setscrew
DIN EN ISO 4029
Drive component
(e. g. sprocket)
&reg;
picture 3: RUFLEX size 0 - 5
4.2 Assembly (General)
)
ATTENTION!
We recommend to check bores, shaft, keyway and feather key for dimensional accuracy
before assembly.
• Please make sure that the RUFLEX&reg; torque limiter is in a technically excellent condition.
• Clean the sliding surfaces of the hub, the drive component, the pressure disc and the friction linings
concerning dirt, oil and grease.
• Protect the torque limiter against any axial displacement on the shaft by a set screw
DIN EN ISO 4029 with toothed cup point or end disc.
!
CAUTION!
Dirty sliding surfaces affect the function of the torque limiter.
Schutzvermerk
ISO 16016 beachten.
Gezeichnet:
Gepr&uuml;ft:
24.06.10 Li/Lm
24.06.10 Li
Ersatz f&uuml;r:
Ersetzt durch:
KTR-N vom 30.03.07
RUFLEX&reg;-torque limiter
with clampable setting nut
Operating-/Assembly Instructions
KTR Kupplungstechnik
GmbH
D-48407 Rheine
KTR-N
sheet:
edition:
46011 EN
5 of 8
5
4 Assembly
4.3 Centering Slide Bush
• Check the width of the centering slide bush.
ZenBu = 1,5 x s1 + b1
Example:
RUFLEX&reg;-torque limiter size 1
Width of drive component e. g. b1 = 8 mm
Width of friction lining s1 = 3 mm
ZenBu = 1,5 x 3 + 8 = 12,5 mm
ZenBu = If you do not indicate the width of the drive
component when placing your order, the
centering slide bush is delivered in max. width.
picture 4: centering slide bush
CAUTION!
If you do not observe the stipulated width of the centering slide bush, the function of the
torque limiter is not guaranteed.
!
Table 2:
RUFLEX&reg; size
Max. width of the
centering slide bush
0
01
1
2
3
4
5
10
13
15
17
21,5
24,5
28
4.4 Disc Spring Layer
single layer (standard)
double layer
triple layer
1TF
size 0 - 5
2TF
size 0 - 5
3TF
size 1 - 5
picture 5: disc spring layer
Table 3:
RUFLEX&reg; size
0
1TF
2TF
3TF
1
2
-
Schutzvermerk
ISO 16016 beachten.
Gezeichnet:
Gepr&uuml;ft:
01
1
Number of disc springs
1
1
2
2
3
24.06.10 Li/Lm
24.06.10 Li
2
3
4
5
1
2
3
1
2
3
1
2
3
1
2
3
Ersatz f&uuml;r:
Ersetzt durch:
KTR-N vom 30.03.07
KTR Kupplungstechnik
GmbH
D-48407 Rheine
RUFLEX&reg;-torque limiter
with clampable setting nut
Operating-/Assembly Instructions
KTR-N
sheet:
edition:
46011 EN
6 of 8
5
4 Assembly
4.5 Initial Adjustment or New Adjustment of the Slipping Torque
1. Secure the hub against torsion.
2. Detach the clamping screw in the setting nut.
3. Tighten the setting nut manually and clockwise until the limit
stop.
4. Please turn the setting nut clockwise with the hook wrench
until reaching the requested setting angle (slipping torque).
Please look at the diagrams of adjustment 1 to 7.
5. After having adjusted the requested slipping torque, fix the
setting nut onto the thread part of the hub by screwing the
clamping screw.
picture 6: torque adjustment
!
!
CAUTION!
The RUFLEX&reg;-torque limiter must not exceed the max. slipping torque!
CAUTION!
The slipping torques indicated in the diagrams refers to the drive parts of steel or cast iron!
During the running-in phase (adaption of the friction partners), after a long standstill and
during or after long slipping procedures, there can be a change of the slipping torque.
picture 7: hinged hook wrench
RUFLEX&reg;
size
0
01
1
2
3
4
5
Hinged hook wrench
with tappet
&Oslash;35 - 60 x 4
&Oslash;35 - 60 x 4
&Oslash;60 - 90 x 6
&Oslash;60 - 90 x 6
&Oslash;90 - 155 x 8
&Oslash;90 - 155 x 8
&Oslash;155 - 230 x 8
4.6 Modification of Slipping Torque
• Secure the hub against torsion.
• Detach the clamping screw in the setting nut.
• Please turn the setting nut (clockwise for higher slipping torque, anticlockwise for lower slipping torque) with
the hook wrench until reaching the requested setting angle (please look at the diagrams of adjustment 1 to 7).
• After having adjusted the requested slipping torque, fix the setting nut onto the thread part of the hub by
screwing the clamping screw.
!
CAUTION!
The RUFLEX&reg;-torque limiter must not exceed the max. slipping torque!
Schutzvermerk
ISO 16016 beachten.
Gezeichnet:
Gepr&uuml;ft:
24.06.10 Li/Lm
24.06.10 Li
Ersatz f&uuml;r:
Ersetzt durch:
KTR-N vom 30.03.07
RUFLEX&reg;-torque limiter
with clampable setting nut
Operating-/Assembly Instructions
KTR Kupplungstechnik
GmbH
D-48407 Rheine
KTR-N
sheet:
edition:
46011 EN
7 of 8
5
4 Assembly
4.7 Diagrams of Adjustment
slipping torque
[Nm]
slipping torque
[Nm]
25
70
60
20
50
2TF
15
2TF
40
30
10
1TF
1TF
20
5
10
30
60
90
120
0
180
150
30
60
90
120
150
180
210
240
270
300
0
330
setting angle of nut [&deg;]
setting angle of nut [&deg;]
&reg;
&reg;
diagram 1: RUFLEX size 0
diagram 2: RUFLEX size 01
slipping torque
[Nm]
slipping torque
[Nm]
210
450
400
180
350
3TF
3TF
150
300
2TF
120
250
2TF
200
90
1TF
150
60
1TF
100
30
90
120
150
180
210
240
270
300
330
360
390
420
0
450
50
60
90
120
150
180
setting angle of nut [&deg;]
210
240
270
300
330
360
0
390
setting angle of nut [&deg;]
&reg;
&reg;
diagram 3: RUFLEX size 1
diagram 4: RUFLEX size 2
slipping torque
[Nm]
slipping torque
[Nm]
800
1800
700
3TF
1500
3TF
600
1200
500
2TF
2TF
900
400
1TF
300
600
1TF
200
300
100
60
0
90 120 150 180 210 240 270 300 330 360 390 420 450 480 510 540
&reg;
180
240
300
360
420
480
540
600
&reg;
diagram 5: RUFLEX size 3
Gezeichnet:
Gepr&uuml;ft:
120
setting angle of nut [&deg;]
setting angle of nut [&deg;]
Schutzvermerk
ISO 16016 beachten.
60
diagram 6: RUFLEX size 4
24.06.10 Li/Lm
24.06.10 Li
Ersatz f&uuml;r:
Ersetzt durch:
KTR-N vom 30.03.07
0
660
RUFLEX&reg;-torque limiter
with clampable setting nut
Operating-/Assembly Instructions
KTR Kupplungstechnik
GmbH
D-48407 Rheine
KTR-N
sheet:
edition:
46011 EN
8 of 8
5
4 Assembly
4.7 Diagrams of Adjustment
slipping torque
[Nm]
3TF
2000
2TF
1600
1200
1TF
800
400
0
240
300
360
420
480
540
600
660
720
setting angle of nut [&deg;]
&reg;
diagram 7: RUFLEX size 5
4.8 Spares Inventory, Customer Service Addresses
A basic requirement to guarantee the operational readiness of the coupling is a stock of the most important spare
parts on site.
Contact addresses of the KTR partners for spare parts and orders can be obtained from the KTR homepage
under www.ktr.com.
Schutzvermerk
ISO 16016 beachten.
Gezeichnet:
Gepr&uuml;ft:
24.06.10 Li/Lm
24.06.10 Li
Ersatz f&uuml;r:
Ersetzt durch:
KTR-N vom 30.03.07
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Key features

Frictionally engaged connection
Overload protection
Adjustable slipping torque
Clampable setting nut
Multiple disc spring options
Clear adjustment diagrams
Durable construction
Wide range of sizes

Frequently asked questions

The KTR RUFLEX torque limiter is designed to protect drive train components from damage caused by overload conditions. It allows for controlled slippage when excessive torque is applied, safeguarding equipment and preventing breakdowns.

To adjust the slipping torque, loosen the clamping screw on the setting nut. Turn the setting nut clockwise for a higher slipping torque and counterclockwise for a lower slipping torque. Refer to the adjustment diagrams in the manual for specific angles and corresponding torque values.

Ensure the drive train is secured against unintentional engagement. Disconnect power and secure the drive unit before performing any work. Do not touch the operating area while the limiter is in operation. Observe all safety instructions provided in the manual.