Dimension Drawing
＊1： E＝D2(D2＜6)
E＝D2+0.5(D2≥6)
*2: In a case where the bore diameter is φ 4 or less, the set screw is used in only one place.Specs/CAD
| Part Number | Max. Bore Diameter (mm) |
Rated Torque＊1 (N・m) | ||||||
|---|---|---|---|---|---|---|---|---|
| MWSS-8 | 4 | 0.2 | 78000 | 2.4×10-8 | 49 | 1 | ±0.1 | 2.7 |
| MWSS-12 | 6 | 0.3 | 52000 | 1.8×10-7 | 140 | 1 | ±0.1 | 7.8 |
| MWSS-16 | 8 | 0.5 | 39000 | 7.2×10-7 | 240 | 1 | ±0.1 | 18 |
| MWSS-20 | 10 | 1 | 31000 | 2.0×10-6 | 330 | 1 | ±0.1 | 32 |
| MWSS-25 | 12 | 2 | 25000 | 6.1×10-6 | 720 | 1 | ±0.2 | 63 |
| MWSS-32 | 16 | 3.5 | 19000 | 2.1×10-5 | 1300 | 1 | ±0.2 | 130 |
＊1： Correction of rated torque due to load fluctuation is not required. For more detailed information, please refer to Selection Guidelines.
＊2： These are values with max. bore diameter.
| Part Number | Standard Bore Diameter (Dimensional Allowance H8) D1･D2 |
||||
|---|---|---|---|---|---|
| MWSS-8 | 2-2 | 3-3 | |||
| MWSS-12 | 4-4 | 4-5 | 4.5-5 | 5-5 | |
| MWSS-16 | 5-5 | 5-6 | 6-6 | ||
| MWSS-20 | 5-6 | 5-8 | 6-6 | 6-8 | 8-8 |
| MWSS-25 | 5-6 | 6-6 | 6-8 | 8-8 | 8-10 |
| 10-10 | |||||
| MWSS-32 | 8-8 | 8-10 | 10-10 | 10-12 | 12-12 |
| 12-14 | |||||
●All products are provided with hex socket set screws.
● Recommended tolerance for shaft diameters is h6 and h7.
● Bore and keyway modifications are available on request. Please take advantage of our modification services.
| Part Number | Standard Bore Diameter (Dimensional Allowance H8) D1･D2 |
|---|---|
| MWSS-8-2-2 | 2-2 |
| 3-3 | |
| MWSS-8-3-3 | 2-2 |
| 3-3 | |
| MWSS-12-4-4 | 4-4 |
| 4-5 | |
| 4.5-5 | |
| 5-5 | |
| MWSS-12-4-5 | 4-4 |
| 4-5 | |
| 4.5-5 | |
| 5-5 | |
| MWSS-12-4.5-5 | 4-4 |
| 4-5 | |
| 4.5-5 | |
| 5-5 | |
| MWSS-12-5-5 | 4-4 |
| 4-5 | |
| 4.5-5 | |
| 5-5 | |
| MWSS-16-5-5 | 5-5 |
| 5-6 | |
| 6-6 | |
| MWSS-16-5-6 | 5-5 |
| 5-6 | |
| 6-6 | |
| MWSS-16-6-6 | 5-5 |
| 5-6 | |
| 6-6 | |
| MWSS-20-5-6 | 5-6 |
| 5-8 | |
| 6-6 | |
| 6-8 | |
| 8-8 | |
| MWSS-20-5-8 | 5-6 |
| 5-8 | |
| 6-6 | |
| 6-8 | |
| 8-8 | |
| MWSS-20-6-6 | 5-6 |
| 5-8 | |
| 6-6 | |
| 6-8 | |
| 8-8 | |
| MWSS-20-6-8 | 5-6 |
| 5-8 | |
| 6-6 | |
| 6-8 | |
| 8-8 | |
| MWSS-20-8-8 | 5-6 |
| 5-8 | |
| 6-6 | |
| 6-8 | |
| 8-8 | |
| MWSS-25-5-6 | 5-6 |
| 6-6 | |
| 6-8 | |
| 8-8 | |
| 8-10 | |
| 10-10 | |
| MWSS-25-6-6 | 5-6 |
| 6-6 | |
| 6-8 | |
| 8-8 | |
| 8-10 | |
| 10-10 | |
| MWSS-25-6-8 | 5-6 |
| 6-6 | |
| 6-8 | |
| 8-8 | |
| 8-10 | |
| 10-10 | |
| MWSS-25-8-8 | 5-6 |
| 6-6 | |
| 6-8 | |
| 8-8 | |
| 8-10 | |
| 10-10 | |
| MWSS-25-8-10 | 5-6 |
| 6-6 | |
| 6-8 | |
| 8-8 | |
| 8-10 | |
| 10-10 | |
| MWSS-25-10-10 | 5-6 |
| 6-6 | |
| 6-8 | |
| 8-8 | |
| 8-10 | |
| 10-10 | |
| MWSS-32-8-8 | 8-8 |
| 8-10 | |
| 10-10 | |
| 10-12 | |
| 12-12 | |
| 12-14 | |
| MWSS-32-8-10 | 8-8 |
| 8-10 | |
| 10-10 | |
| 10-12 | |
| 12-12 | |
| 12-14 | |
| MWSS-32-10-10 | 8-8 |
| 8-10 | |
| 10-10 | |
| 10-12 | |
| 12-12 | |
| 12-14 | |
| MWSS-32-10-12 | 8-8 |
| 8-10 | |
| 10-10 | |
| 10-12 | |
| 12-12 | |
| 12-14 | |
| MWSS-32-12-12 | 8-8 |
| 8-10 | |
| 10-10 | |
| 10-12 | |
| 12-12 | |
| 12-14 | |
| MWSS-32-12-14 | 8-8 |
| 8-10 | |
| 10-10 | |
| 10-12 | |
| 12-12 | |
| 12-14 |
●All products are provided with hex socket set screws.
● Recommended tolerance for shaft diameters is h6 and h7.
● Bore and keyway modifications are available on request. Please take advantage of our modification services.
Additional Modification Service
Modified Part Number
Enter the desired bore diameter and then click [Check Modified Part Number].
| Standard bore diameter(D1) | Standard bore diameter(D2) | Modified Part Number | Price | Add to cart |
|---|---|---|---|---|
|
mm
in.
|
mm
in.
|
Cart |
| Shaft Hole D1D2 |
keyway | Key | |||||||
|---|---|---|---|---|---|---|---|---|---|
| b | t | Nominal Dimension b×h |
|||||||
| Basic Dimension | Allowance (JS9) |
Basic Dimension | Allowance | ||||||
| 6 | 7 | 2 | ±0.0125 | 1.0 | +0.1 0 |
2×2 | |||
| 8 | 9 | 10 | 3 | ±0.0125 | 1.4 | 3×3 | |||
| 11 | 12 | 4 | ±0.0150 | 1.8 | 4×4 | ||||
| 13 | 14 | 15 | 16 | 17 | 5 | ±0.0150 | 2.3 | 5×5 | |
| 18 | 19 | 20 | 22 | 6 | ±0.0150 | 2.8 | 6×6 | ||
| 24 | 25 | 28 | 30 | 8 | ±0.0180 | 3.3 | +0.2 0 |
8×7 | |
| 32 | 35 | 36 | 38 | 10 | ±0.0180 | 3.3 | 10×8 | ||
| 40 | 42 | 44 | 12 | ±0.0215 | 3.3 | 12×8 | |||
| 45 | 48 | 50 | 14 | ±0.0215 | 3.8 | 14×9 | |||
- Refer to the "Couplicon Bore Diameter Additional Modification Service" for more information.
- BT： Additional modification of bore
- KT： Metric Keyway Modification (JIS Standard)
- KA： Inch Keyway Modification (AGMA Standard)
Slip torque
As in the table below, the clamping types MWS-C and MWSS-C have different slip torque according to the bore diameter. Take care during selection.Unit : N・m
| Part Number | Bore Diameter (mm) | |||||||
|---|---|---|---|---|---|---|---|---|
| 4 | 4.5 | 5 | 6 | 8 | 10 | 12 | 14 | |
| MWS-25C | 3 | 3.1 | 3.5 | |||||
| MWSS-12C | 0.3 | 0.4 | 0.5 | |||||
| MWSS-20C | 0.9 | 1.9 | ||||||
| MWSS-25C | 1.2 | 1.4 | 1.9 | 3.1 | ||||
| MWSS-32C | 1.9 | 2.4 | 3.4 | 4.1 | ||||
These are test values based on the conditions of shaft dimensional allowance: h7, hardness: 34-40 HRC, and screw tightening torque of the values described in MWS-CMWSS-C dimension tables. They are not guaranteed values.
Slip torque changes with usage conditions. Carry out tests under conditions similar to actual conditions in advance.
Structure
Set Screw TypeMWSMWSS
MWS Made of aluminum alloyMWSS Made of all stainless steel
Clamping TypeMWS-CMWSS-C
MWS-CMade of aluminum alloy
Material/Finish
| MWSS | |
|---|---|
| Main Body | SUS303 |
| Hex Socket Set Screw | SUSXM7 |
| Hex Socket Head Cap Screw | SUSXM7 |
Characteristics
- Recommended Applicable Motor
| MWS | MWSS | |
|---|---|---|
| Servomotor | ● | ● |
| Stepping Motor | ◎ | ◎ |
| General-purpose Motor | ● | ● |
- Property
| MWS | MWSS | |
|---|---|---|
| Zero Backlash | ◎ | ◎ |
| High Torque | ○ | ○ |
| High Torsional Stiffness | ○ | ○ |
| Corrosion Resistance (All S.S.) | - | ◎ |
- This is a metal spring coupling with single-piece construction. A slit is inserted into a cylindrical material.
- A plate spring formed by a slit allows angular misalignment, and end-play to be accepted.
- There are two types of units made of aluminum alloy or all stainless steel.
Application
Transport device / XY stage / Parts feederSelection
Selection Based on Shaft Diameter and Rated Torque
The area bounded by the shaft diameter and rated torque indicates the selection size.
Selection Example
In case of selected parameters of shaft diameter of φ 5 and load torque of 0.8 N•m, the selected size forMWSMWSSis MWS-20MWSS-20.Thrust reaction force
Change in static torsional stiffness due to temperature
This is a value under the condition where the static torsional stiffness at 20°C is 100%. The change of MWS and MWSS in torsional stiffness due to temperature is small and the change in responsiveness is extremely small. If the unit is used under higher temperature, be careful about misalignment due to elongation or deflection of the shaft associated with thermal expansion.
Related Products
A slit-type coupling XWSS-C SUS316L material finished with clean washing and clean packaging, which is best suited to FPD and semiconductor manufacturing equipment, is available.XSTS-C
