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.)

SRB Series Go to SRB Series(Index)

Radial Beam Coupling_Stainless Steel Body

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

Side-clamp (SRBMS-C)

Dimensions / Performance
Model CAD Size (±0.3mm, *L: ±1.0mm) Screw Rated
Torque
(N·m)		 Max.
Torque
(N·m)		 Max.
rpm
(min-1)		 Moment
of
Inertia
(kg·m2)		 Static
Torsional
Stiffness
(N·m/rad)		 Mass
(g)		 Permissible Misalignment
D L L1 F Size Fastening
Torque
(N·m)		 Angular
(˚)		 Parallel
(mm)		 End-play
(mm)
SRBMS-12C 12.7 14 5 2.5 M2 0.5 0.2 0.4 20,000 2.4×10-7 120 10 1 – ±0.15
SRBMS-16C 16 16 6 3 M2.6 1 0.4 0.8 20,000 7.0×10-7 240 20 1 – ±0.15
SRBMS-19C 19.1 17 6.3 3.1 M2.6 1 0.6 1.2 19,000 1.5×10-6 300 32 1 – ±0.15
SRBMS-22C 22.2 20 7.4 3.7 M3 1.5 1 2 17,000 3.1×10-6 350 42 1 – ±0.15
SRBMS-26C 26.2 23 8.4 4.1 M3 1.5 2 4 15,000 7.2×10-6 720 70 1 – ±0.15
SRBMS-32C 31.8 30 11 5.4 M4 2.5 3.8 7.6 10,000 2.0×10-5 1,300 140 1 – ±0.15
  • 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.
Standard Inner Diameter (ID)
Model Standard Inner Diameter (d1, d2) (mm)
3 4 5 6 6.35 8 9.525 10 11 12 14 15
SRBMS-12C ● ● ●
SRBMS-16C ● ● ● ●
SRBMS-19C ● ● ● ● ●
SRBMS-22C ● ● ● ● ● ●
SRBMS-26C ● ● ● ● ● ● ● ●
SRBMS-32C ● ● ● ● ● ● ●
  • 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 (Side-clamp type only)
  • 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 Max.
Torque
(N·m)		 Slip Torque (N·m) by Inner Diameter (d1, d2)
3 4 5 6 6.35 8 9.525 10 11 12 14 15
SRBMS-12C 0.4 0.3 0.3 0.3
SRBMS-16C 0.8 0.4 0.5
SRBMS-19C 1.2 0.7 1.1
SRBMS-22C 2 1 1.3 1.4 1.8
SRBMS-26C 4 1.3 1.3 1.6 2.2 2 2 2.3
SRBMS-32C 7.6 1.5 1.5 1.5 1.7 2.9 4.1 3.5