CLAMPEX® KTR 620
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
40822 EN
1 of 11
10
CLAMPEX® KTR 620
The CLAMPEX® clamping set is a frictionally engaged, detachable shaft-hub-connection for cylindrical
shafts and bores without feather key.
Table of contents
1
Technical data
2
2
Advice
6
2.1
2.2
2.3
2.4
General advice
Safety and advice symbols
General hazard warnings
Intended use
6
6
7
7
Storage, transport and packaging
7
3.1
3.2
7
7
3
4
Storage
Transport and packaging
Assembly
4.1
4.2
4.3
8
Components of clamping set CLAMPEX® KTR 620
Assembly of the clamping set
Disassembly of clamping set
8
8
10
5
Disposal
10
6
Spares inventory, customer service addresses
11
7
Advice regarding the use in
EU directive 2014/34/EU
11
Please observe protection
note ISO 16016.
Drawn:
Verified:
potentially explosive atmospheres according to
2021-04-01 Pz/Jh
2021-04-27 Pz
Replacing:
Replaced by:
KTR-N dated 2019-07-17
KTR-N
Sheet:
Edition:
CLAMPEX® KTR 620
Operating/Assembly instructions
1
40822 EN
2 of 11
10
Technical data
Illustration 1: CLAMPEX® KTR 620
Table 1:
dxD
[mm]
16 x 41
18 x 44
20 x 47
24 x 50
26 x 51.5
30 x 60
36 x 72
38 x 72
40 x 80
44 x 80
50 x 90
55 x 100
60 x 110
62 x 110
68 x 115
75 x 138
80 x 141
Shaft
diameter
dw
[mm]
13
14
15
16
17
18
19
20
22
20
22
24
24
25
26
27
30
33
27
30
33
34
35
37
38
40
42
42
45
48
48
50
52
48
50
52
50
55
60
55
60
65
60
65
70
Transmittable
torque or axial
force
T
[Nm]
Fax
[kN]
70
90
80
110
150
175
165
215
280
200
260
330
370
420
465
480
650
835
480
645
765
830
770
880
1130
1260
1400
1300
1600
1900
1700
1950
2160
1700
1950
2160
1900
2500
3150
2700
3400
4100
3300
4100
4950
11
13
11
14
18
19
17
22
25
20
24
28
33
34
37
36
43
51
36
43
46
49
44
48
59
63
67
62
71
79
71
78
83
76
91
83
76
91
105
98
113
126
110
126
141
Please observe protection
note ISO 16016.
Clamping screws
DIN EN ISO 4017 - 10.9
total = 0.10
Dimensions
[mm]
Surface
pressure of
clamping
set/
hollow shaft
PH
[N/mm2]
Weight
~ kg
B
B1
B2
d1
M
Length
z
TA
[Nm]
19.5
15.3
13.5
28
M6
12
3
13
254
0.1
19.5
15.3
13.5
30
M6
12
4
13
222
0.1
19.5
15.3
13.5
32
M6
12
4
13
274
0.1
22.0
18.22
16
36
M6
16
5
13
243
0.2
22
18.05
16
38
M6
16
5
13
238
0.2
24.0
20.26
18
44
M6
16
6
13
255
0.30
27.5
22.1
20
52
M8
20
5
30
250
0.5
27.5
22.1
20
52
M8
20
5
30
240
0.5
29.5
24.22
22
61
M8
20
6
30
31.5
26.1
23.5
68
M8
20
8
30
212
0.80
34.5
29
26
72
M8
20
8
30
195
1.1
34.5
29.25
26
80
M8
20
9
30
191
1.3
34.5
29.25
26
80
M8
20
9
30
189
1.3
35
29.4
26
86
M8
20
9
30
206
1.3
37.5
30.7
27
100
M10
25
10
60
211
2.3
37.5
31.1
27
104
M10
25
10
60
215
2.3
209
Drawn:
Verified:
2021-04-01 Pz/Jh
2021-04-27 Pz
Replacing:
Replaced by:
192
0.6
KTR-N dated 2019-07-17
KTR-N
Sheet:
Edition:
CLAMPEX® KTR 620
Operating/Assembly instructions
1
40822 EN
3 of 11
10
Technical data
Illustration 1: CLAMPEX® KTR 620
Continuation: table 1
dxD
[mm]
85 x 155
90 x 155
95 x 170
100 x 170
105 x 185
110 x 185
115 x 197
120 x 197
125 x 215
130 x 215
130 x 230
135 x 230
140 x 230
150 x 263
160 x 290
Shaft
diameter
dw
[mm]
65
70
75
65
70
75
70
75
80
70
75
80
80
85
90
80
85
90
85
90
95
85
90
95
90
95
100
95
100
110
95
100
110
95
100
110
100
105
115
110
120
125
120
130
135
Transmittable
torque or axial
force
T
[Nm]
Fax
[kN]
5500
6400
7300
5500
6600
7900
6200
7400
8600
6200
7400
8600
10500
11800
13700
10500
11800
13700
12500
14100
16000
12500
14100
16000
14500
16600
18800
17000
18400
22000
18400
20800
26200
18400
20800
26200
19900
22200
27800
2700
32000
36200
39000
48000
51000
169
183
195
169
189
211
177
197
215
177
197
215
263
278
304
263
278
304
294
313
337
294
313
337
322
349
376
358
368
400
387
416
476
387
416
476
398
423
483
491
533
579
650
738
756
Please observe protection
note ISO 16016.
Clamping screws
DIN EN ISO 4017 - 10.9
total = 0.10
Dimensions
[mm]
Surface
pressure of
clamping
set/
hollow shaft
PH
[N/mm2]
Weight
~ kg
B
B1
B2
d1
M
Length
z
TA
[Nm]
44.5
38.2
34
114
M10
25
11
60
216
3.2
44.5
38.2
34
114
M10
25
11
60
223
3.2
50
43.45
39
124
M10
30
14
60
182
4.3
50
43.45
39
124
M10
30
14
60
176
4.3
56.5
49.1
43.5
136
M12
35
12
100
208
5.8
56.5
49.1
43.5
136
M12
35
12
100
202
5.8
60.5
53
48
147
M12
35
14
100
193
6.9
60.5
53
48
147
M12
35
14
100
189
6.9
61
53.4
48
158
M12
35
14
100
196
8.7
61
53.4
48
158
M12
35
14
100
187
9.4
66.5
75.5
51
165
M14
40
12
160
213
10.8
66.5
57.5
51
165
M14
40
12
160
209
10.8
67
57.8
51
172
M14
40
12
160
207
10.3
71
62.2
55
186
M14
40
14
160
202
15.2
78.5
68.5
61
198
M16
45
12
250
215
21.5
Drawn:
Verified:
2021-04-01 Pz/Jh
2021-04-27 Pz
Replacing:
Replaced by:
KTR-N dated 2019-07-17
KTR-N
Sheet:
Edition:
CLAMPEX® KTR 620
Operating/Assembly instructions
1
40822 EN
4 of 11
10
Technical data
Illustration 1: CLAMPEX® KTR 620
Continuation: table 1
dxD
[mm]
165 x 290
170 x 300
175 x 300
180 x 320
185 x 320
190 x 340
195 x 340
200 x 340
220 x 370
240 x 405
260 x 430
280 x 460
300 x 485
320 x 520
340 x 570
Shaft
diameter
dw
[mm]
120
130
135
130
140
145
130
140
145
140
15
155
140
150
155
150
160
165
150
160
165
150
160
165
160
170
180
170
180
200
190
200
220
210
220
240
220
230
250
240
250
270
250
260
280
Transmittable
torque or axial
force
T
[Nm]
Fax
[kN]
39000
48000
51000
46500
53000
59000
46500
53000
59000
66000
76000
83000
66000
76000
83000
82000
91000
102000
82000
91000
102000
82000
91000
102000
105000
120000
138000
125000
145000
182000
165000
190000
238000
220000
245000
300000
297000
330000
399000
331000
365000
437000
429000
469000
556000
650
738
756
715
757
814
715
757
814
943
1013
1071
943
1013
1071
1093
1138
1236
1093
1138
1236
1093
1138
1236
1313
1435
1533
1471
1611
1820
1737
1900
2164
2095
2227
2500
2700
2870
3192
2758
2920
3237
3432
3608
3971
Please observe protection
note ISO 16016.
Clamping screws
DIN EN ISO 4017 - 10.9
total = 0.10
Dimensions
[mm]
Surface
pressure of
clamping
set/
hollow shaft
PH
[N/mm2]
Weight
~ kg
B
B1
B2
d1
M
Length
z
TA
[Nm]
78.5
68.5
61
198
M16
45
12
250
212
21.5
79
68.9
61
208
M16
50
14
250
212
22.5
79
68.9
61
208
M16
50
14
250
209
22.5
95
85
77.5
222
M16
50
16
250
210
32.7
95
85
77.5
222
M16
50
16
250
207
32.7
98
87.7
77.5
238
M16
50
16
250
225
36.3
98
87.7
77.5
238
M16
50
16
250
222
36.3
98
87.7
77.5
238
M16
50
16
250
219
36.3
120
107.55
96.5
268
M20
60
15
480
205
53
123.5
111.1
98
288
M20
60
16
480
214
66
138
125.3
110.5
312
M20
60
16
480
202
82
152.5
140
121
334
M20
60
18
480
193
103
159
139.8
124
360
M24
70
16
840
205
120
160.5
141.6
124
380
M24
70
18
840
190
138
177.5
158.4
139
402
M24
70
18
840
195
189
Drawn:
Verified:
2021-04-01 Pz/Jh
2021-04-27 Pz
Replacing:
Replaced by:
KTR-N dated 2019-07-17
KTR-N
Sheet:
Edition:
CLAMPEX® KTR 620
Operating/Assembly instructions
1
40822 EN
5 of 11
10
Technical data
Illustration 1: CLAMPEX® KTR 620
Continuation: table 1
dxD
[mm]
360 x 590
390 x 650
420 x 670
440 x 710
460 x 750
470 x 705
480 x 770
500 x 820
530 x 850
560 x 885
590 x 950
620 x 960
660 x
1020
700 x
1085
750 x
1100
800 x
1230
Shaft
diameter
dw
[mm]
270
280
290
290
300
320
320
330
350
340
350
370
360
370
390
370
380
400
380
390
410
400
410
430
430
440
460
450
460
480
470
480
500
500
520
540
530
550
570
560
580
600
600
620
650
640
660
700
Transmittable
torque or axial force
T
[Nm]
Fax
[kN]
545000
592000
694000
704000
760000
879000
827000
876000
1000000
1117000
1190000
1345000
1306000
1386000
1554000
950000
1000000
1150000
1557000
1648000
1818000
1653000
1725000
1915000
2048000
2154000
2374000
2306000
2419000
2654000
2735000
2863000
3128000
3150000
3396000
3689000
3636000
3942000
4261000
4189000
4520000
4863000
5281000
5672000
6287000
6091000
6511000
7394000
4037
4229
4786
4855
5067
5494
5169
5309
5714
6571
6800
7270
7256
7492
7969
5135
5263
5750
8195
8451
8868
8265
8415
8907
9526
9791
10322
10249
10517
11058
11638
11929
12512
12600
13062
13663
13721
14335
14951
14961
15586
16210
17603
18297
19345
19034
19730
21126
Please observe protection
note ISO 16016.
Drawn:
Verified:
Clamping screws
DIN EN ISO 4017 - 10.9
total = 0.10
Dimensions
[mm]
Surface
pressure of
clamping
set/
hollow shaft
PH
[N/mm2]
Weight
~ kg
B
B1
B2
d1
M
Lengt
h
z
TA
[Nm]
182
163
143
424
M24
70
20
840
216
207
191
169.2
148
454
M27
70
18
1250
216
249
208.4
186.4
166
486
M27
70
20
1250
184
285
220
198
179
506
M27
70
21
1250
222
343
223
201
179
534
M27
70
21
1250
230
387
241.6
219.6
200
538
M27
70
21
1250
151
340
247
223
201
551
M30
100
21
1650
223
449
241
217
198
572
M30
100
24
1650
214
515
262.3
238.3
216
606.5
M30
100
24
1650
208
585
266
242
220
632
M30
100
24
1650
212
636
281.5
257.5
236
664
M30
100
28
1650
211
805
307
283
258
706
M30
100
28
1650
201
853
319
293
267
748
M33
130
28
2250
199
993
318.5
292.5
263
788
M33
130
28
2250
187
1112
346
320
280
850
M33
130
32
2250
202
1111
359
333
296
900
M33
130
32
2250
202
1589
2021-04-01 Pz/Jh
2021-04-27 Pz
Replacing:
Replaced by:
KTR-N dated 2019-07-17
CLAMPEX® KTR 620
Operating/Assembly instructions
1
KTR-N
Sheet:
Edition:
40822 EN
6 of 11
10
Technical data
Tolerances, surfaces
Tolerances for dW 2):
dW ≤ Ø160 = h6/H7
dW > Ø160 = g6H7
1) One proper turning process is
sufficient (Rz ≤ 16 µm).
2) Maximum permissible
tolerance of hub or shaft.
Illustration 2:Tolerances and surfaces (example: CLAMPEX® KTR 620)
2
Advice
2.1 General advice
Please read through these operating/assembly instructions carefully before you mount the clamping set.
Please pay special attention to the safety instructions!
The operating/assembly instructions are part of your product. Please store them carefully and close to the
clamping set. The copyright for these operating/assembly instructions remains with KTR.
2.2 Safety and advice symbols
STOP
!
Warning of potentially explosive
atmospheres
This symbol indicates notes which may contribute to
preventing bodily injuries or serious bodily injuries that
may result in death caused by explosion.
Warning of personal injury
This symbol indicates notes which may contribute to
preventing bodily injuries or serious bodily injuries that
may result in death.
Warning of product damages
This symbol indicates notes which may contribute to
preventing material or machine damage.
General advice
This symbol indicates notes which may contribute to
preventing adverse results or conditions.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2021-04-01 Pz/Jh
2021-04-27 Pz
Replacing:
Replaced by:
KTR-N dated 2019-07-17
CLAMPEX® KTR 620
Operating/Assembly instructions
2
KTR-N
Sheet:
Edition:
40822 EN
7 of 11
10
Advice
2.3 General hazard warnings
STOP
With assembly and disassembly of the clamping set it has to be made sure that the entire
drive train is secured against accidental switch-on. You may be seriously hurt by rotating
parts. Please make absolutely sure to read through and observe the following safety
indications.
• All operations on and with the clamping set have to be performed taking into account "safety first".
• Please make sure to switch off the power pack before you perform your work on the clamping set.
• Secure the power pack against accidental switch-on, e. g. by providing warning signs at the place of switch-on
or removing the fuse for current supply.
• Do not reach into the operation area of the machine as long as it is in operation.
• Please secure the rotating drive components against accidental contact. Please provide for the necessary
protection devices and covers.
2.4 Intended use
You may only assemble and disassemble the clamping set if you
• have carefully read through the operating/assembly instructions and understood them
• are technically qualified and specifically trained (e. g. safety, environment, logistics)
• are authorized by your company
The clamping set may only be used in accordance with the technical data (see table 1). Unauthorized
modifications on the clamping set are not admissible. We will not assume liability for any damage that may arise.
In the interest of further development we reserve the right for technical modifications.
The clamping set described in here corresponds to the technical status at the time of printing of these
operating/assembly instructions.
3
Storage, transport and packaging
3.1 Storage
The clamping sets are supplied in preserved condition and can be stored at a dry and roofed place for 6 - 9
months.
!
Humid storage rooms are not suitable.
Please make sure that condensation is not generated.
3.2 Transport and packaging
The clamping sets are packed differently each depending on size, quantity and kind of transport. Unless
otherwise contractually agreed, packaging will follow the in-house packaging specifications of KTR.
!
In order to avoid any injuries and any kind of damage please always make use of proper
transport and lifting equipment.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2021-04-01 Pz/Jh
2021-04-27 Pz
Replacing:
Replaced by:
KTR-N dated 2019-07-17
KTR-N
Sheet:
Edition:
CLAMPEX® KTR 620
Operating/Assembly instructions
4
40822 EN
8 of 11
10
Assembly
Generally the clamping set is supplied in mounted condition. Before assembly the clamping set has to be
inspected for completeness.
4.1 Components of clamping set CLAMPEX® KTR 620
Component
1
2
3
Quantity
1
1
see table 1
Description
External ring (phosphated)
Internal ring
Hexagon screws DIN EN ISO 4017 (phosphated) 1)
1) External and internal rings with QPQ coating: hexagon screws DIN EN ISO 4017 with Geomet coating
Illustration 3: CLAMPEX® KTR 620
!
Dirty or used clamping sets have to be disassembled and cleaned before assembly.
Afterwards the taper surfaces and threads have to be lubricated with Molykote MoS 2 (see
illustration 4). For re-lubrication please use the multi-purpose grease Molykote G Rapid
plus, as an example.
If hexagon screws with Geomet coating are used, the tappings of the external ring and the
hexagon screws must not be lubricated with Molykote.
4.2 Assembly of the clamping set
!
Inspect the taper surfaces and clamping screws of the clamping set for the lubrication
specified.
• Inspect the fit of shaft and hub for the tolerance specified (see illustration 4).
• Clean and degrease the contact surfaces of shaft and hub/hollow shaft inside.
!
!
The contact surfaces of shaft and hub bore (hollow
shaft inside) must neither be lubricated nor oiled
(see illustration 4).
If hexagon screws with Geomet coating are used, the
tappings of the external ring and the hexagon screws
must not be lubricated with Molykote.
When mounting the tapers of the clamping set free
from grease the tabular and calculated parameters
deviate.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2021-04-01 Pz/Jh
2021-04-27 Pz
Illustration 4: Cleaning and lubricating the
contact surfaces
Replacing:
Replaced by:
KTR-N dated 2019-07-17
CLAMPEX® KTR 620
Operating/Assembly instructions
4
KTR-N
Sheet:
Edition:
40822 EN
9 of 11
10
Assembly
4.2 Assembly of the clamping set
• Unscrew the clamping screws by several revolutions so that the external ring detaches slightly from the
internal ring.
• Afterwards position the clamping set KTR 620 outside on the hub/hollow shaft (see illustration 5 and
illustration 6).
The external surface of the hub (hollow shaft outside) can be lubricated in the area of the fit
of external clamping set.
• Push the hollow shaft along with the clamping set onto the shaft.
• Hand-tighten the clamping screws first and align the external clamping set with the hub and hollow shaft.
!
Mount the shaft before tightening the clamping screws.
• Tighten the clamping screws gradually in several revolutions evenly one after another (see illustration 7) until
the front surfaces on the screw head side of external and internal ring are flush. Consequently correct
clamping of external and internal ring can be inspected visually (see illustration 8).
When tightening the clamping screws the maximum screw tightening torque (see table 1) must not be
exceeded.
Protruding of the internal ring up to 0.5 mm is permissible with QPQ coating.
Illustration 5: Pushing the clamping set
onto the hollow shaft
Illustration 6: Pushing onto the shaft
Illustration 7: Tightening the
clamping screws
Illustration 8: Visual
inspection
During assembly the hub is not displaced axially to the shaft with KTR 620.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2021-04-01 Pz/Jh
2021-04-27 Pz
Replacing:
Replaced by:
KTR-N dated 2019-07-17
CLAMPEX® KTR 620
Operating/Assembly instructions
4
KTR-N
Sheet:
Edition:
40822 EN
10 of 11
10
Assembly
4.3 Disassembly of clamping set
STOP
Driving components released or falling down may cause injury to persons or damage on the
machine.
Secure the driving components before disassembly.
• Unscrew all clamping screws evenly one after another in several revolutions. Do not fully unscrew the
clamping screws out of the thread.
To reduce the clamping forces do not fully unscrew the clamping screws in no case.
!
• Screw the separate screws into the extraction threads of the internal ring (component 2) (see illustration 9).
Select the number of screws z1 and size of thread M1 according to table 1.
• Tighten the clamping screws evenly at ¼ revolution one after another. Increase the extraction torque gradually
until the external ring (component 1) and internal ring (component 2) are separated.
• Remove the shaft from the hub/hollow shaft.
• Pull the released clamping set from the hub/hollow shaft.
Illustration 9: Releasing the clamping set KTR 620
!
If these hints are not observed or operating conditions are not considered with the selection
of the clamping set, the operation of the clamping set may be affected.
Used clamping sets have to be disassembled and cleaned before assembly. Afterwards the
taper surfaces and threads have to be lubricated with Molykote MoS 2 (see illustration 4). For
re-lubrication please use the multi-purpose grease Molykote G Rapid plus, as an example.
5
Disposal
In respect of environmental protection we would ask you to dispose of the packaging or products on termination of
their service life in accordance with the legal regulations and standards that apply, respectively.
All clamping sets consist of metal. Any metal components have to be cleaned and disposed of by scrap metal.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2021-04-01 Pz/Jh
2021-04-27 Pz
Replacing:
Replaced by:
KTR-N dated 2019-07-17
CLAMPEX® KTR 620
Operating/Assembly instructions
6
KTR-N
Sheet:
Edition:
40822 EN
11 of 11
10
Spares inventory, customer service addresses
A basic requirement to ensure the readiness for use of the drive components is a stock of some clamping sets on
site.
Contact addresses of the KTR partners for spare parts and orders can be obtained from the KTR homepage at
www.ktr.com.
7
KTR does not assume any liability or warranty for the use of spare parts and accessories
which are not provided by KTR and for the damages which may incur as a result.
Advice regarding the use in
EU directive 2014/34/EU
potentially explosive atmospheres according to
If used in potentially explosive atmospheres the type and size of clamping set (for category 3 only) has to be
selected in that the difference between the peak torque of the machine including all operating parameters and the
rated torque of the clamping hub at least corresponds to a safety factor of s = 2.0.
CLAMPEX® clamping sets are not part of directive 2014/34/EU, since
• this product is a torsionally rigid, backlash-free, frictionally engaged connection with one or more taper
clamping ring(s) ensured by several screws.
(Clamping screws have to be secured, e. g. by means of a medium strength adhesive.)
• due to the design of clamping sets a fracture/failure is not likely (frictional heat is only generated by improper
assembly/tightening torques, i. e. with use other than for intended purpose).
Please observe protection
note ISO 16016.
Drawn:
Verified:
2021-04-01 Pz/Jh
2021-04-27 Pz
Replacing:
Replaced by:
KTR-N dated 2019-07-17
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