SK2
Torque Limiter with clamping hub for direct drives

0.1 - 1,800 Nm

SK2 TORQUE LIMITER WITH CLAMPING HUB FOR DIRECT DRIVES

Specifications SK2

SK2 series 1,5 2 4,5 10 15 30 60 80 150 200 300 500 800 1500
Adjustment range available
from - to (approx. values) (Nm)
TKN
0.1-0.6
0.4-1
0.8-1.5
0.2-1.5
0.5-2
1-3
3-6
2-6
4-12
5-10
8-20
10-25
20-40
10-30
25-80
20-70
30-90
20-70
45-150
80-180
30-90
60-160
120-240
100-200
150-240
200-320
80-200
200-350
300-500
400-650
500-800
650-850
650-800
700-1200
1000-1800
Adjustment range available from - to (approx. values), full disengagement (Nm) TKN 0.3-0.8
0.6-1.3
0.2-1

0.7-2
2.5-4.5 2-5
5-10
7-15 8-20
16-30
20-40
30-60
20-60
40-80
20-60
40-80
80-150
80-140
130-200
120-180
160-300
60-150
100-300
250-500
200-400
450-800
1000-1250
1250-1500
Overall length (mm) A 42
4651
5765
6574
7582
8795
102112
115127
116128
128140
139153
163177
190 223
Overall length, full disengagement (mm) AF 42
4651
5765
6574
7582
8795
102112
117129
118130
131143
142156
167181
201 232
Actuation ring Ø (mm) B 23 29 35 45 55 65 73 92 92 99 120 135 152 174
Actuation ring Ø, full disengagement (mm) BF 24 32 42 51.5 62 70 83 98 98 117 132 155 177 187
Fit length (mm) C 11 13 16 16 22 27 31 35 35 40 42 51 48 67
Inner diameter
from Ø to Ø H7 (mm)
D1 /
D2
3-8 4-12 5-14 6-16 10-26 12-30 15-32 19-42 19-42 24-45 30-60 35-60 40-75 50-80
Inner diameter
from Ø to Ø H7 (inch)
D1 /
D2
0,125"-
0,313"
0,187"-
0,375"
0,250"-
0,500"
0,250"-
0,750"
0,500"-
1,000"
0,500"-
1,125"
0,625"-
1,250"
0,750"-
1,625"
0,750"-
1,625"
1,000"-
1,750"
1,250"-
2,250"
1,500"-
2,250"
1,625"-
2,875"
2,000"-
3,125"
Diameter (mm) D3 9 12 14 20 21.1 24.1 32.1 36.1 36.1 42.1 58.1 60.1 60.1 68.1
Outer diameter of coupling (mm) E 19 25 32 40 49 55 66 81 81 90 110 123 134 157
Distance (mm) F 12 13 15 17 19 24 30 31 31 35 35 45 50 63
Distance,
(full disengagement) (mm)
FF
11.5 12 14 16 19 22 29 31 30 33 35 43 54 61
Distance (mm) G 3.5 4 5 5 6.5 7.5 9.5 11 11 12.5 13 17 18 22.5
Distance between centers (mm) H 6 8 10 15 17 19 23 27 27 31 39 41 2x48 2x55
Screw ISO 4762 I M2.5 M3 M4 M4 M5 M6 M8 M10 M10 M12 M12 M16 2xM16 2xM20
Tightening torque (Nm) I 1 2 4 4.5 8 15 40 50 70 120 130 200 250 470
Approx. weight (kg)0.047 0.07 0.2 0.3 0.4 0.6 1 2 2.4 4 5.9 9.6 14 21
Moment of interia

(10-3 kgm2)
Jges
0.01 0.01 0.02
0.060.07
0.100.15
0.270.32
0.750.80
1.801.90
2.502.80
5.105.30
11.511.8
22.823.0
42.0 83.0
Torsional stiffness
(103 Nm/rad)
CT
0.7
1.21.3
75
98
2015
3928
7655
12985
175110
191140
420350
510500
780 1304
Lateral misalignment max. (mm)0.15
0.150.20
0.200.25
0.200.30
0.150.20
0.200.25
0.200.25
0.200.25
0.200.25
0.250.30
0.250.30
0.300.35
0.35 0.35
Angular misalignment max. (degrees)1
11.5
1.52
1.52
11.5
11.5
11.5
11.5
11.5
1.52
1.52
22.5
2.5 2.5
Lateral spring stiffness (N/mm)70
4030
29045
280145
475137
900270
1200420
920255
1550435
2040610
37501050
2500840
2000 3600
Actuation path (mm)0.7 0.8 0.8 1.2 1.5 1.5 1.7 1.9 1.9 2.2 2.2 2.2 2.2 3
CAD Portal 1,5 2 4,5 10 15 30 60 80 150 200 300 500 800 1500
2D/3D Data 

Properties

  • Design: With clamping hub and 1 radial screw ISO 4762.
  • Temperature range: -30° C to +100° C (-22° F to +212° F)
  • Backlash: Absolutely backlash free through frictional clamping connection
  • Service life: Maintenance free when operated within the technical specifications.
  • Tolerance: Tolerance between hub and shaft 0.01 – 0.05 mm.
  • Material:
    • bellows made of highly elastic stainless steel
    • torque limiter section: High strength hardened steel
    • hub material: up to series 80 aluminium from series up 150 steel
  • Properties of Torque Limiter model SK2:
    • absolutely backlash-free and torsionally rigid
    • easy mounting and dismounting
    • adjustable settings
    • electrically ant thermally insulated
    • compensation of shaft misalignments
    • low moment of interia
    • actuation ring moves to trigger external sensor
    • disengagement within 1 - 3 msecs