Dimension Drawing
＊1： E = D2 + 0.2(D2＜4)
E = D2 + 0.7 (4 ≤ D2＜E max.)
＊1： E = D2 + 0.2(D2＜4)
E = D2 + 0.7 (4 ≤ D2＜E max.)
| Part Number | Max. Bore Diameter (mm) |
Max. Rotational Frequency (min-1) |
Moment of Inertia (kg・m2)＊1 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| No Load (mm) | |||||||||
| MSH-13C-4-4 | 5 | 48000 | 6.8×10-7 | 4.6 | 0.25 | 0.11 | 5 | ±0.25 | 5.8 |
＊1： 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
- Applicable motors
| MSH | |
|---|---|
| Servomotor | ● |
| Stepping Motor | ◎ |
| General-purpose Motor | ● |
- Property
| MSH | |
|---|---|
| Zero Backlash | ◎ |
| Allowable Misalignment | ◎ |
| Small Eccentric Reaction Force | ◎ |
- This is a metal spring coupling with single-piece construction. A spiral-shaped slit is inserted into a cylindrical material.
- Because there is no backlash and the flexibility is excellent, it is suited to use at low torque for encoders, etc.
- The eccentric reaction force is minimal. It reduces burden on the shaft and helps prevent equipment damage.
- Metric and inch size bore diameters are available as standard.
- The structure is simple, enabling easy separation.
Material/Finish
| MSH | |
|---|---|
| Main Body | A7075 Anodized＊1 |
| Hex Socket Set Screw | SCM435 Ferrosoferric Oxide Film (Black) |
| Hex Socket Head Cap Screw | SCM435 Ferrosoferric Oxide Film (Black) |
＊1： Due to manufacturing process requirements, couplings may have bores with or without surface treatment. This does not affect the performance of the couplings.
Slip torque
As in the table below, the clamping types MSH-C have different slip torque according to the bore diameter. Take care during selection.Unit : N・m
| Part Number | Bore Diameter（mm） | |||||||
|---|---|---|---|---|---|---|---|---|
| 3 | 3.175 | 3.97 | 4 | 4.76 | 5 | 6 | 9.525 | |
| MSH-13C | 0.3 | 0.3 | ||||||
| MSH-16C | 0.4 | 0.3 | 0.3 | 0.5 | 0.3 | 0.3 | ||
| MSH-20C | 0.4 | 0.6 | 0.8 | 0.6 | 0.9 | |||
| MSH-26C | 2.6 | 3.3 | ||||||
| MSH-32C | 5.2 | |||||||
These are test values based on the conditions of screw tightening torque of the values described in MSH-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.
Torque by bore
Torque Value Differs According to the Bore Diameter. Refer to the Larger Bore Diameter of D1 and D2.Unit : N・m
| Part Number | Bore Diameter | Torque | ||
|---|---|---|---|---|
| Instantaneous Transmission | Single-Direction Rotation | Forward/Reverse Rotation | ||
| MSH-8 | 1.5 mm | 0.2 | 0.1 | 0.05 |
| 2 mm | 0.17 | 0.08 | 0.04 | |
| 3/32in | 0.15 | 0.07 | 0.03 | |
| 3 mm | 0.15 | 0.07 | 0.03 | |
| 1/8in | 0.11 | 0.05 | 0.02 | |
| MSH-13C | 3 mm | 0.44 | 0.22 | 0.11 |
| 1/8in | 0.42 | 0.21 | 0.1 | |
| 4 mm | 0.4 | 0.2 | 0.1 | |
| 5 mm | 0.4 | 0.2 | 0.1 | |
| MSH-16C | 3 mm | 0.98 | 0.49 | 0.24 |
| 1/8in | 0.96 | 0.48 | 0.24 | |
| 5/32in | 0.86 | 0.43 | 0.21 | |
| 4 mm | 0.79 | 0.39 | 0.19 | |
| 3/16in | 0.7 | 0.35 | 0.17 | |
| 5 mm | 0.7 | 0.35 | 0.17 | |
| MSH-20C | 3 mm | 1.6 | 0.8 | 0.4 |
| 1/8in | 1.57 | 0.78 | 0.39 | |
| 5/32in | 1.44 | 0.72 | 0.36 | |
| 4 mm | 1.35 | 0.67 | 0.33 | |
| 3/16in | 1.24 | 0.62 | 0.31 | |
| 5 mm | 1.2 | 0.6 | 0.3 | |
| 6 mm | 1.11 | 0.55 | 0.27 | |
| 1/4in | 1.01 | 0.5 | 0.25 | |
| MSH-26C | 5 mm | 4.27 | 2.13 | 1.06 |
| 6 mm | 3.43 | 1.71 | 0.85 | |
| 1/4in | 3.32 | 1.66 | 0.83 | |
| 5/16in | 2.84 | 1.42 | 0.71 | |
| 8 mm | 2.82 | 1.41 | 0.7 | |
| 3/8in | 2.48 | 1.24 | 0.62 | |
| 10 mm | 2.48 | 1.24 | 0.62 | |
| MSH-32C | 3/8in | 5.78 | 2.89 | 1.44 |
| 10 mm | 5.55 | 2.77 | 1.38 | |
| 1/2in | 4.4 | 2.2 | 1.1 | |
| 5/8in | 3.27 | 1.63 | 0.81 | |
Structure
Outside diameter φ8
Application
Transport devices / actuators / optical equipment / encodersPrecautions 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 Maintenance
- There 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
Technical Information
Eccentric Reaction Force
Thrust Reaction Force
Specification Changes
Please be informed of the following changes to the specifications of some sizes of the Flexible Coupling – Set Screw Type.See here for details
https://www.nbk1560.com/news/2025/20251203_Flexible-Coupling/
