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.| Part Number | Max. Bore Diameter (mm) |
Rated Torque＊1 (N・m) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| MST-16-6-7 | 8 | 0.5 | 39000 | 3.3×10-7 | 80 | 0.1 | 2 | ±0.4 | 8.1 |
＊1： Correction of rated torque due to load fluctuation is not required.
＊2： These are values with max. bore diameter.
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)
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 eccentricity, angular misalignment, and end-play to be accepted.
- There are two types of units made of aluminum alloy or all stainless steel.
- Wide variation of outside diameter φ 8 - φ 63.
- Property
| MST | MSTS | |
|---|---|---|
| Zero Backlash | ◎ | ◎ |
| High Torque | ○ | ○ |
| High Torsional Stiffness | ○ | ○ |
| Allowable Misalignment | ○ | ○ |
| Corrosion Resistance (All S.S.) | - | ◎ |
- Recommended Applicable Motor
| MST | MSTS | |
|---|---|---|
| Servomotor | ● | ● |
| Stepping Motor | ◎ | ◎ |
| General-purpose Motor | ● | ● |
Material/Finish
| MST | |
|---|---|
| Main Body | A2017 Anodized |
| Hex Socket Head Cap Setscrew |
SCM435 Ferrosoferric Oxide Film (Black) |
| Hex Socket Head Cap Bolt |
SCM435 Ferrosoferric Oxide Film (Black) |
Structure
MSTS-KMade of all stainless steel
Set Screws + Key TypeMST-KMSTS-K
MST-KMade of aluminum alloy
Outside diameter φ12 - φ32
Clamping TypeMST-CMSTS-C
MST-C Made of aluminum alloyMSTS-C Made of all stainless steel
Outside diameter φ40 - φ63
Set Screw TypeMSTMSTS
MST Made of aluminum alloyMSTS Made of all stainless steel
Application
Transport device / XY stage / Parts feederSelection
Selection Example
In case of selected parameters of shaft diameter of φ10 and load torque of 1.5 N•m, the selected size forMSTMSTSis MST-25MSTS-25
Selection Based on Shaft Diameter and Rated Torque
The area bounded by the shaft diameter and rated torque indicates the selection size.Eccentric Reaction Force
Thrust reaction force
Change in static torsional stiffness due to temperature
The change of MST and MSTS 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.
