Shaft Coupling

Coupling is a core component that transmits power and motion
from the driving shaft to the driven part while absorbing misalignment
and any possible factors that could reduce efficiency of machines
(e.g. vibration, noise, electric current, etc.)

SK Series

Schmidt-Kupplung Coupling

  • SK – 2D (.dwg)
  • SK – 3D (.step)
Dimensions / Performance
SIZE Performance CT
kNm/rad		 Dimensions
ΔKr min
mm		 ΔKr
mm		 ΔKv
mm		 ΔKw
°		 TKN
Nm		 TKmax
Nm		 min-1 D
mm		 R
mm		 J
kg cm2		 m
kg		 L
mm		 L1
mm		 F
mm		 d
mm		 M
SK 4.2.6/3 6 23 45 0.8 45 85 2,800 10 60 62 2.8 0.5 44 8 45 25 3xM6
SK 4.2.8/5 0.5 110 210 1,800 24 82 84 8.9 0.8 67 40 5xM6
SK 4.5.6/3 13 50 95 0.8 45 85 1,900 10 60 62 3.1 0.6 45 25 3xM6
SK 4.5.8/5 0.5 110 210 1,600 24 82 84 9.1 1.1 67 40 5xM6
SK 7.3.7/3 9 34 64 0.8 110 210 3,500 24 70 74 7.5 1.1 74 12.5 48 25 3xM10
SK 7.3.9/3 0.8 150 290 3,100 33 90 94 21.5 1.7 70 45 3xM10
SK 7.7.9/3 17 66 126 0.8 150 290 2,200 33 90 94 24 1.9 70 45 3xM10
SK 7.7.12/4 0.5 280 550 1,900 63 120 124 63 3 98 50 4xM10
SK 10.5.12/3 14 53 100 0.5 360 710 2,300 81 120 120 95 4.5 101 17 90 50 3xM12
SK 10.5.12/4 0.5 480 945 2,300 108 120 120 105 5 90 50 4xM12
SK 10.9.12/3 22 85 162 0.5 360 710 1,700 81 120 120 107 5.1 90 50 3xM12
SK 10.9.14/4 0.5 590 1,155 1,800 132 140 140 187 6.8 110 50 4xM12
SK 13.6.14/3 17 64 122 0.5 630 1,240 1,700 142 140 143 275 9.8 134 26 100 55 3xM16
SK 13.6.16/4 0.5 1,010 1,980 1,600 227 158 164 475 13 120 60 4xM16
SK 13.9.14/3 22 85 162 0.5 630 1,240 1,500 142 140 143 285 10 100 55 3xM16
SK 13.9.16/4 0.5 1,010 1,980 1,400 227 158 164 480 13.2 120 60 4xM16
SK 16.7.16/3 18 68 129 0.5 1,130 2,200 1,500 252 158 164 550 15 155 31 115 60 3xM16
SK 16.7.18/4 0.5 1,760 3,440 1,400 395 180 184 680 17 135 70 4xM16
SK 16.10.16/3 25 95 180 0.5 1,130 2,200 1,200 252 158 164 585 16 115 60 3xM16
SK 16.10.18/4 0.5 1,760 3,440 1,200 395 180 180 910 20 135 70 4xM16
SK 20.9.20/3 22 85 162 0.3 2,160 4,220 1,200 484 200 202 1,500 26 196 33 150 80 3xM20
SK 20.9.25/4 0.3 3,830 7,500 1,000 860 250 252 3,700 41 200 100 4xM20
SK 20.15.20/3 37 142 270 0.3 2,160 4,220 900 484 200 202 1,850 32 150 80 3xM20
SK 20.15.25/4 0.3 3,830 7,500 800 860 250 252 4,100 44 200 100 4xM20
  • TKN= rated torque, TKMAX= Maximum torque capacity, min-1 = Max. rpm, ΔKv= Maximum linear range of the coupling, △Kr= Maximum radial offset capacity, △Kr min= Min. required radial offset
  • △Kw= Max. angular misalignment capacity, Ct= Torsional stiffness, J= Moment of inertia, m= Mass, L= Coupling length, M= Numbers of threaded bores x bolt size, F= Bolt circle diameter
  • Size SK 4.2.6/3 – SK 16.10.18/4 allows an axial misalignment up to 1mm; Size SK 20.9.20/3 – SK 20.15.25/4 up to 2mm.