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.)
SD Series
Disk Type Coupling 
| Single Disk | Double Disk | |||||
|---|---|---|---|---|---|---|
| Model | SDS (No mark) | SDS-C | SDSS-C | SDW (No mark) | SDW-C | SDWS-C |
| Shape |  |
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 |
 |
 |
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| Hub Material | High Strength Aluminum Alloy | Stainless Steel | High Strength Aluminum Alloy | Stainless Steel | ||
| Clamping Methods | Set-screw | Side-clamp | Set-screw | Side-clamp | ||
| OD range | Ø16-Ø64 | Ø12-Ø104.5 | Ø16-Ø94.5 | Ø16-Ø64 | Ø12-Ø104.5 | Ø16-Ø94.5 |
| ID range | Ø3-Ø30 | Ø3-Ø50 | Ø3-Ø45 | Ø3-Ø30 | Ø3-Ø50 | Ø3-Ø45 |
| For more info | View more > | View more > | View more > | View more > | ||
Single Module vs Double Module
- SD Series absorbs the misalignment through the plate springs in the middle part. Therefore, the double module is better at absorption of misalignment than the single module.
- On the other hand, the single module has higher stiffness and precise positioning feature as well as it saves space in terms of shorter length(L).
| Single Disk | Double Disk | |
|---|---|---|
| Plate-Spring Modules | 1 | 2 |
| Transmission Level of Torque (Permissible Torque) |
Identical | |
| Static Torsional Stiffness | High | Low |
| Absorption of Misalignment |
Low | High |
Custom Service : Extra plate springs Reinforcement
- The most important part that determines the performance of SD coupling is assembly set of Plate-Springs.
- As a customized service, Sung-il Machinery provides extra quantity of plate springs added according to customer’s special requests.
- However, please be aware that this process makes strength of product enhanced, at the same time it may increase reaction force on shafts and would give negative effects on the connected devices.
- Please contact Sung-il Customer Service team for more details.
