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.)

SCJ Series

Cross Joint Coupling

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

Set-screw

Dimensions / Performance
Model CAD Size (±0.3mm) 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)
SCJ-15 15 22.2 8 3.9 M3 0.7 0.25 0.5 21,000 2.9×10-7 200 9 1.5 0.3
SCJ-20 20 23.4 7.9 3.8 M3 0.7 0.5 1 16,000 1.0×10-6 450 20 1.5 0.5
SCJ-25 25 30.4 10.4 5 M4 1.7 1 2 12,000 3.1×10-6 800 35 1.5 0.5
SCJ-32 32 39 13.5 6.6 M4 1.7 2 4 9,000 1.1×10-5 1,200 75 1.5 0.5
SCJ-40 40 45.6 16 7.8 M5 4 5 10 7,000 3.1×10-5 1,900 145 1.5 0.5
  • 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. (Set-screw type is usually less durable than other clamping method, thus please consider it has a complementary option e.g. keyway along with.)
Standard Inner Diameter (ID)
Model Standard Inner Diameter (d1, d2) (mm)
3 4 5 6 6.35 8 10 11 12 14 15
SCJ-15 ● ● ●
SCJ-20 ● ● ● ● ●
SCJ-25 ● ● ● ● ●
SCJ-32 ● ● ● ● ● ● ●
SCJ-40 ● ● ● ● ● ●
  • 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)