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.)

SRG Series Go to SRG Series(Index)

Rigid Coupling

  • SRG – 2D (.dwg)
  • SRG – 3D (.step)

Side-clamp

Dimensions / Performance

SRG-C

Model CAD Size (±0.3mm) Screw Rated
Torque
(N·m)		 Max.
rpm
(min-1)		 Moment
of
Inertia
(kg·m2)		 Mass
(g)		 Side-
clamp
Hub
Split
(W)
D L L1 F1 Size Fastening
Torque
(N·m)
SRG-16C 16 16 7 3.7 M2.6 1 1 18,000 2.5×10-7 6.8 ○
SRG-20C 20 20 9 4.6 M2.6 1 2.5 15,000 7.5×10-7 12 ○
SRG-25C 25 25 11.5 5.8 M3 1.7 4 12,000 2.3×10-6 24 ○
SRG-32C 32 32 15 7.6 M4 3.5 9 10,000 8.0×10-6 52 ○
SRG-43C 43 41 19.5 10 M5 8 20 8,000 3.3×10-5 114 ○
SRG-53C 53 51 24.5 12.5 M6 13 25 6,000 9.2×10-5 234 ○
  • The Moment of Inertia and Mass values are based on products with max. Inner diameter.
  • Max. torque/rated torque is the value regarding to a coupling’s self-durability and is not related to slip-torque between the coupling bore and the shaft.

SRGL-C

Model CAD Size (±0.3mm) Screw Rated
Torque
(N·m) 		Max.
rpm
(min-1)		 Moment
of
Inertia
(kg·m2) 		Mass
(g)		 Side-
clamp
Hub
Split
(W)
D L L1 F1 F2 Size Fastening
Torque
(N·m)
SRGL-16C 16 22.5 10.3 3 5.4 M2.6 1 1 16,000 3.4×10-7 9.3 ○
SRGL-20C 20 24 11 3.1 5.6 M2.6 1 2.5 14,000 8.6×10-7 14 ○
SRGL-25C 25 35 16.5 4.7 7.6 M3 1.7 4 10,000 3.2×10-6 34 ○
SRGL-32C 32 40 19 5.3 9.1 M4 3.5 9 9,000 9.8×10-6 63 ○
SRGL-43C 43 52 25 7 11.5 M5 8 20 7,000 4.1×10-5 141 ○
SRGL-53C 53 66 32 9 14.5 M6 13 25 5,500 1.3×10-4 297 ○
  • The Moment of Inertia and Mass values are based on products with max. Inner diameter.
  • Max. torque/rated torque is the value regarding to a coupling’s self-durability and is not related to slip-torque between the coupling bore and the shaft.
  • To ensure even tightening, tighten the screws to the recommended torque for the initial tightening, and then repeat the process 2-3 times, alternating with each screw.
Standard Inner Diameter (ID)
Model Standard Inner Diameter (d1, d2) (mm)
3 4 5 6 8 10 11 12 14 15 16 18 20 22 24
SRG□-16C ● ● ● ●
SRG□-20C ● ● ● ● ●
SRG□-25C ● ● ● ● ● ●
SRG□-32C ● ● ● ● ● ● ●
SRG□-43C ● ● ● ● ● ● ● ● ●
SRG□-53C ● ● ● ● ● ● ● ●
  • The recommended shaft tolerance is h7.
  • Custom process (e.g. non-standard Inner diameter, special tolerance etc.) is also available upon a special request in prior to order placement.
  • Keyway is available. (Optional)
Slip Torque
  • The below table shows the actual permissible torque values when the slip torque value is lower than the coupling’s max. torque value.
  • If the slip torque value is lower than the coupling’s max. torque value, please check and compare between the slip torque in the below table and the operating torque value of the connected motor. It is safer to size up the coupling or use a key/keyway when the slip torque value is lower than the motor’s operating torque.
  • The below slip torque values may be subject to change according to different testing conditions. (e.g. shaft tolerance, surface roughness, surface treatment or acceleration/deceleration of driving shafts). On the other hand, the values could be affected when a different kind of fastening screw is used (body material or surface treatment). Therefore, we recommend you test under the same conditions before mounting.
Model Rated
Torque
(N·m)		 Slip Torque (N·m) by Inner Diameter (d1, d2)
3 4 5 6 8 10 11 12 14
SRG□-16C 1 1
SRG□-20C 2.5 1.7
SRG□-25C 4
SRG□-32C 9 7.5 8.5
SRG□-43C 20
SRG□-53C 25
Various options for Side-clamp Hub Split available
SRG-C 1-side hub split
SRG-32CW-10W-14
ID 10mm : Hub Split (W)
ID 14mm : Not Split

SRG-C 1-side hub split
SRG-32CW-10W-14W
ID 10mm : Hub Split (W)
ID 14mm : Hub Split (W)
SRGL-32CW-10W-14
ID 10mm : Hub Split (W)
ID 14mm : Not Split
SRGL-32CW-10W-14W
ID 10mm : Hub Split (W)
ID 14mm : Hub Split (W)