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Price (excluding tax)
■Disc coupling
・Plate spring absorbs misalignment and transmits power accurately
・Series most commonly used for servo and stepping
■Single disc type
・Model name: SDS (no symbol), SDS-C, SDSS-C
・Excellent rigidity, high positioning power (accuracy), short overall length and space saving
・Plate spring module: 1 piece
・Torsion spring rigidity: High
・Non-aligned absorption: low
■Double disc type
・Model name: SDW (no symbol), SDW-C, SDWS-C
- Leaf springs absorb misalignment. Therefore, the double disc type with many leaf springs has excellent misalignment correction ability.
・Plate spring module: 2 pieces
・Torsion spring rigidity: low
・Non-aligned absorption: high
■Plate spring reinforcement service
・The most important element in determining the performance of a disc type coupling is the leaf spring.
-In addition to standard products, the number of stainless steel plates that make up the leaf spring module can be increased.
- Reinforcing the leaf spring will increase its strength, but it will also increase the reaction force transmitted to the surrounding areas (motors, etc.), which may have a negative impact on peripheral devices.
- If you require improved strength and rigidity, we can accommodate custom orders with reinforced leaf springs.
■Shaft slip torque
- If the shaft slip torque is smaller than the maximum torque of the coupling, compare the shaft slip torque with the actually applied torque (check the motor specifications and load factor).
- If the shaft slip torque is smaller than the actual torque used, we recommend increasing the size of the coupling or using a key for safety.
・We recommend that you test the product under the same conditions as the actual usage conditions before use.
■Structure and materials
You can search for other models from each index. The displayed value is the value of the currently selected part number.
Applicable motor
Fastening bolt size
Fastening method
High torque (durability)
Hub material
Main use
Mass (g)
Maximum rotation speed (min^1)
Maximum torque (N m)
Misalignment tolerance Eccentricity (mm)
Misalignment tolerance end play (mm)
Misalignment tolerance value Declination angle (˚)
Model name
Moment of inertia (kg m2)
Non-aligned absorption
Oil resistance
Operating temperature
Regular torque (N m)
Slip torque by inner diameter (N m)
Standard inner diameter (mm)
Tightening bolt Tightening torque (N m)
Torsional stiffness
Torsional stiffness (N m/rad)
Vibration absorption/damping
Zero backlash (accuracy)
Inner diameter range
Outer diameter range
Electrical insulation
Part Number
SD seriesProduct
CouplingHandling Company
Seiichi Kiko Co., Ltd.Categories
| Image | Price (excluding tax) | Applicable motor | Fastening bolt size | Fastening method | High torque (durability) | Hub material | Inner diameter range | Main use | Mass (g) | Maximum rotation speed (min^1) | Maximum torque (N m) | Misalignment tolerance Eccentricity (mm) | Misalignment tolerance end play (mm) | Misalignment tolerance value Declination angle (˚) | Model name | Moment of inertia (kg m2) | Non-aligned absorption | Oil resistance | Outer diameter range | Regular torque (N m) | Standard inner diameter (mm) | Tightening bolt Tightening torque (N m) | Torsional stiffness | Torsional stiffness (N m/rad) | Zero backlash (accuracy) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Available upon quote | Servo, stepping, encoder: 〇 | M2.5~M8 | Set screw: general, keyway Clamp: general, clamp separation, keyway | 〇 | High strength aluminum alloy, stainless steel | Ø3-Ø30 | Semiconductor manufacturing equipment, SMT, Cartesian coordinate robots, UVW stages, machine tools, index tables | 5~292 | 7,000~16,000 | 1~62 | 0.02 | ±0.1~±0.25 | 0.5~1.0 | (Single disk) SDS, SDS-C, SDSS-C (double disc) SDW, SDW-C, SDWS-C | 1.7×10^5~6.9×10^7 | 〇 | 〇 | Ø16-Ø64 | 0.5~31 | 3~30 | 0.5~15 | ☆ | 270~20,000 | ☆ |
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Reviews shown here are reviews of companies.
