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.)

SAD Series Go to SAD Series(Index)

Advanced Double Disk Coupling [SADW]

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

Side-clamp

Dimensions / Performance
Model CAD Size (±0.3mm) Screw Permissible
Torque
(N·m) 		Max.
rpm
(min-1)		 Moment
of
Inertia
(kg·m2) 		Static
Torsional
Stiffness
(N·m/rad) 		Mass
(g)		 Permissible Misalignment Side-
clamp
Hub
Split (W)
D D1 L L1 F Size Fastening
Torque
(N·m)		 Angular
(˚)		 Parallel
(mm)		 End-
play
(mm)
SADW-19C 19 8.5 26.6 8.5 2.6 M2 0.5 1.3 14,000 9.1X10-7 600 18 2 0.1 ±0.2 X
SADW-27C 27 14.5 34.4 11 3.3 M2.6 1 3 10,000 4.8X10-6 1,300 42 2 0.15 ±0.3 X
SADW-32C 32 15.5 40 12 3.6 M3 1.7 4.5 9,000 1.1X10-5 2,000 72.6 2 0.2 ±0.4 X
SADW-35C 35 16.5 37.4 12.5 3.8 M3 1.7 6 8,500 1.5X10-5 2,200 83 2 0.2 ±0.4 X
SADW-40C 40 20.5 46.9 15.5 4.5 M4 3.5 12 8,500 3.3X10-5 4,800 132.6 2 0.2 ±0.4 X
SADW-44C 44 22.5 46.9 15.5 4.5 M4 3.5 14 8,000 5.0X10-5 6,000 161 2 0.2 ±0.6 X
  • The Moment of Inertia and Mass values are based on products with max. Inner diameter.
  • Permissible 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 4.5 5 6 6.35 7 8 9 9.525 10 11 12 12.7 14 15 15.875 16 17 18 19 20 22
SADW-19C ● ● ● ● ● ● ● ●★
SADW-27C ● ● ● ● ● ● ● ● ● ● ● ● ● ●★
SADW-32C ● ● ● ● ● ● ● ● ● ● ● ● ●★
SADW-35C ● ● ● ● ● ● ● ● ● ● ● ● ● ●★ ●★
SADW-40C ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●★
SADW-44C ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●★
  • 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.
  • The IDs with ★ mark may have structural limitations for additional keyway machining. Please contact customer service, especially if non-standard keyway dimensions are needed.
  • Due to interference of the middle parts, make sure the shaft is only inserted into L1 depth for IDs with ★ mark. Consult us first if you’re concerned about misalignment.
Slip Torque
  • The below table shows the actual permissible torque values when the slip torque value is lower than the coupling’s permissible torque value.
  • If the slip torque value is lower than the coupling’s permissible 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 Permissible
Torque (N·m)		 Slip Torque (N·m) by Inner Diameter(d1, d2)
3 4 4.5 5 6 6.35 7 8 9 9.525 10 11 12 12.7
SADW-19C 1.3 0.7 1.3
SADW-27C 3 2.1 2.5 2.6 3
SADW-32C 4.5 3.1 3.9 4.1 4.5
SADW-35C 6 3.3 4.5
SADW-40C 12 4.8 6.5 7.5 8.3 9 10.2
SADW-44C 14 8 10 12 13