Dimension Drawing
＊1： E＝D2(D2＜6)
E＝D2+0.5(D2≥6)
Specs/CAD
| Part Number | Max. Bore Diameter (mm) |
Rated Torque＊1 (N・m) | ||||||
|---|---|---|---|---|---|---|---|---|
| MWSS-12C | 5 | 0.3 | 52000 | 1.8×10-7 | 140 | 1 | ±0.1 | 8.5 |
| MWSS-16C | 6 | 0.5 | 39000 | 7.8×10-7 | 240 | 1 | ±0.1 | 21 |
| MWSS-20C | 8 | 1 | 31000 | 2.1×10-6 | 330 | 1 | ±0.1 | 36 |
| MWSS-25C | 10 | 2 | 25000 | 6.3×10-6 | 720 | 1 | ±0.2 | 69 |
| MWSS-32C | 14 | 3.5 | 19000 | 2.2×10-5 | 1300 | 1 | ±0.2 | 150 |
＊1： Correction of rated torque due to load fluctuation is not required.
The shaft's slip torque may be smaller than the coupling's rated torque depending on the shaft bore. ⇒Slip torque
＊2： These are values with max. bore diameter.| Part Number | Standard Bore Diameter D1･D2 | ||||
|---|---|---|---|---|---|
| MWSS-12C | 4-4 | 4-4.5 | 4-5 | 4.5-5 | 5-5 |
| MWSS-16C | 4.5-5 | 5-5 | 5-6 | 6-6 | |
| MWSS-20C | 5-6 | 5-8 | 6-6 | 6-7 | 6-8 |
| 8-8 | |||||
| MWSS-25C | 5-6 | 6-6 | 6-8 | 6-10 | 8-8 |
| 8-10 | 10-10 | ||||
| MWSS-32C | 8-8 | 8-10 | 10-10 | 10-12 | 12-12 |
| 12-14 | |||||
●All products are provided with hex socket head cap screw.
●Recommended tolerance for shaft diameters is h6 and h7.
●Bore additional modification is available on request. Please take advantage of our modification services.
●For the shaft insertion amount to the coupling, see Mounting/maintenance. ⇒Mounting and Maintenance
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 |
| Applicable Bore Diameter D1D2 |
keyway | Key | |||||||
|---|---|---|---|---|---|---|---|---|---|
| b | t | Nominal Dimension b×h |
|||||||
| Standard Dimension | Allowance (JS9) |
Standard 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 | |||
| 55 | 16 | ±0.0215 | 4.3 | 16×10 | |||||
| Standard Inch Bore Diameter D1D2 |
Keyway | |||
|---|---|---|---|---|
| Wk | T | |||
| Standard Dimension | Allowance | Standard Dimension | Allowance | |
| 1/2 | 1/8 | +0.002 0 |
0.560 | +0.01 0 |
| 9/16 | 1/8 | +0.002 0 |
0.623 | +0.01 0 |
| 5/8 | 3/16 | +0.002 0 |
0.709 | +0.01 0 |
| 11/16 | 3/16 | +0.002 0 |
0.773 | +0.01 0 |
| 3/4 | 3/16 | +0.002 0 |
0.837 | +0.01 0 |
| 13/16 | 3/16 | +0.002 0 |
0.900 | +0.01 0 |
| 7/8 | 3/16 | +0.002 0 |
0.964 | +0.01 0 |
| 15/16 | 1/4 | +0.002 0 |
1.051 | +0.01 0 |
| 1 | 1/4 | +0.002 0 |
1.114 | +0.01 0 |
| 1-1/8 | 1/4 | +0.002 0 |
1.241 | +0.01 0 |
| 1-1/4 | 1/4 | +0.002 0 |
1.367 | +0.01 0 |
| 1-3/8 | 5/16 | +0.002 0 |
1.518 | +0.01 0 |
| 1-1/2 | 3/8 | +0.002 0 |
1.669 | +0.01 0 |
| 1-5/8 | 3/8 | +0.002 0 |
1.796 | +0.01 0 |
| 1-3/4 | 3/8 | +0.002 0 |
1.922 | +0.01 0 |
- 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
MWSS-CMade of all stainless steel
Clamping TypeMWS-CMWSS-C
MWS-CMade of aluminum alloy
Set Screw TypeMWSMWSS
MWS Made of aluminum alloyMWSS Made of all stainless steel
Material/Finish
| MWSS-C | |
|---|---|
| Main Body | SUS303 |
| Hex Socket Set Screw | SUSXM7 |
| Hex Socket Head Cap Screw | SUSXM7 |
Characteristics
- 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.
- Property
| MWS | MWSS | |
|---|---|---|
| Zero Backlash | ◎ | ◎ |
| High Torque | ○ | ○ |
| High Torsional Stiffness | ○ | ○ |
| Corrosion Resistance (All S.S.) | - | ◎ |
- Recommended Applicable Motor
| MWS | MWSS | |
|---|---|---|
| Servomotor | ● | ● |
| Stepping Motor | ◎ | ◎ |
| General-purpose Motor | ● | ● |
Application
Transport device / XY stage / Parts feederPrecautions for Use
In case of mounting on D-cut shaft, be careful about the position of the D-cut surface of the shaft. ⇒Mounting and MaintenanceThere are sizes where the hex socket head bolt exceeds the outer diameter of the coupling and the rotating diameter is larger than the outer diameter. Please be careful of the interference of coupling. Rotation Diameter
Selection
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.
Selection Based on Shaft Diameter and Rated Torque
The area bounded by the shaft diameter and rated torque indicates the selection size.Thrust reaction force
Change in static torsional stiffness due to temperature
