• Couplings
  • Slit Type

MSH-8

Flexible Couplings - Spiral Slit Type

  • Zero Backlash
  • Single-Piece Construction

Dimension Drawing

MSHFlexible Couplings - Spiral Slit Type寸法図

*1: E = D2 + 0.2(D2<4)

E = D2 + 0.7 (4 ≤ D2<E max.)

MSHFlexible Couplings - Spiral Slit Type寸法図

*1: E = D2 + 0.2(D2<4)

E = D2 + 0.7 (4 ≤ D2<E max.)

Specs/CAD

Part Number ALWE max.FGM Screw Tightening
Torque (N・m)
Standard Bore Diameter (Dimensional Allowance H8)
D1 - D2
Price
(USD)
CAD
Download
Add to Cart Additional Modification
MSH-8 8 3.6 14 3.175 1.8 - M2 0.3 31.65 CAD Cart       

Part Number Max. Bore Diameter
(mm)
Max. Rotational Frequency
(min-1)
Moment of
Inertia
(kg・m2)*1
Static
Torsional
Stiffness
(N・m/rad)*1
Max. Eccentricity Max. Angular
Misalignment
(°)
Max. Axial
Misalignment
(mm)
Mass
(g)*1
No Load
(mm)
With Load
(mm)
MSH-8 3.175 78000 1.0×10-7 1.2 0.2 0.11 5 ±0.25 1.4

*1: These are values with max. bore diameter.

Part Number Standard Bore Diameter (Dimensional Allowance H8)
D1-D2
MSH-8 1.5 mm - 1.5 mm 1.5 mm - 3 mm 2 mm - 2 mm 2 mm - 3 mm 3/32" - 3/32"
3/32" - 1/8" 3 mm - 3 mm 1/8" - 1/8"
MSH-13C 3 mm - 3 mm 1/8" - 1/8" 4 mm - 4 mm 4 mm - 5 mm 5 mm - 5 mm
MSH-16C 3 mm - 5 mm 1/8" - 1/8" 1/8" - 5/32" 1/8" - 3/16" 5/32" - 5/32"
5/32" - 3/16" 4 mm - 4 mm 4 mm - 5 mm 3/16" - 3/16" 3/16" - 5 mm
5 mm - 5 mm
MSH-20C 3 mm - 5 mm 1/8" - 1/8" 1/8" - 5/32" 1/8" - 3/16" 1/8" - 1/4"
5/32" - 5/32" 5/32" - 3/16" 5/32" - 1/4" 4 mm - 4 mm 4 mm - 5 mm
3/16" - 3/16" 3/16" - 5 mm 3/16" - 1/4" 5 mm - 5 mm 5 mm - 6 mm
5 mm - 1/4" 1/4" - 1/4"
MSH-26C 5 mm - 5 mm 5 mm - 6 mm 5 mm - 1/4" 1/4" - 1/4" 1/4" - 5/16"
1/4" - 8 mm 1/4" - 3/8" 1/4" - 10 mm 5/16" - 5/16" 5/16" - 3/8"
8 mm - 8 mm 8 mm - 10 mm 3/8" - 3/8"
MSH-32C 3/8" - 3/8" 3/8" - 1/2" 3/8" - 5/8" 10 mm - 10 mm 1/2" - 1/2"
1/2" - 5/8" 5/8" - 5/8"

MSH-8 is provided with hex socket set screws.
MSH-13C to MSH-32C are provided with hex socket head cap screws.
● Recommended tolerance for shaft diameters is h6 and h7.


MSH-8 is provided with hex socket set screws.
MSH-13C to MSH-32C are provided with hex socket head cap screws.
● Recommended tolerance for shaft diameters is h6 and h7.
Part Number Standard Bore Diameter (Dimensional Allowance H8)
D1-D2
MSH-8 1.5 mm - 1.5 mm 1.5 mm - 3 mm 2 mm - 2 mm 2 mm - 3 mm 3/32" - 3/32"
3/32" - 1/8" 3 mm - 3 mm 1/8" - 1/8"
MSH-13C 3 mm - 3 mm 1/8" - 1/8" 4 mm - 4 mm 4 mm - 5 mm 5 mm - 5 mm
MSH-16C 3 mm - 5 mm 1/8" - 1/8" 1/8" - 5/32" 1/8" - 3/16" 5/32" - 5/32"
5/32" - 3/16" 4 mm - 4 mm 4 mm - 5 mm 3/16" - 3/16" 3/16" - 5 mm
5 mm - 5 mm
MSH-20C 3 mm - 5 mm 1/8" - 1/8" 1/8" - 5/32" 1/8" - 3/16" 1/8" - 1/4"
5/32" - 5/32" 5/32" - 3/16" 5/32" - 1/4" 4 mm - 4 mm 4 mm - 5 mm
3/16" - 3/16" 3/16" - 5 mm 3/16" - 1/4" 5 mm - 5 mm 5 mm - 6 mm
5 mm - 1/4" 1/4" - 1/4"
MSH-26C 5 mm - 5 mm 5 mm - 6 mm 5 mm - 1/4" 1/4" - 1/4" 1/4" - 5/16"
1/4" - 8 mm 1/4" - 3/8" 1/4" - 10 mm 5/16" - 5/16" 5/16" - 3/8"
8 mm - 8 mm 8 mm - 10 mm 3/8" - 3/8"
MSH-32C 3/8" - 3/8" 3/8" - 1/2" 3/8" - 5/8" 10 mm - 10 mm 1/2" - 1/2"
1/2" - 5/8" 5/8" - 5/8"

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
3/32" 0.15 0.07 0.03
3 mm 0.15 0.07 0.03
1/8" 0.11 0.05 0.02
MSH-13C 3 mm 0.44 0.22 0.11
1/8" 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
1/8" 0.96 0.48 0.24
5/32" 0.86 0.43 0.21
4 mm 0.79 0.39 0.19
3/16" 0.7 0.35 0.17
5 mm 0.7 0.35 0.17
MSH-20C 3 mm 1.6 0.8 0.4
1/8" 1.57 0.78 0.39
5/32" 1.44 0.72 0.36
4 mm 1.35 0.67 0.33
3/16" 1.24 0.62 0.31
5 mm 1.2 0.6 0.3
6 mm 1.11 0.55 0.27
1/4" 1.01 0.5 0.25
MSH-26C 5 mm 4.27 2.13 1.06
6 mm 3.43 1.71 0.85
1/4" 3.32 1.66 0.83
5/16" 2.84 1.42 0.71
8 mm 2.82 1.41 0.7
3/8" 2.48 1.24 0.62
10 mm 2.48 1.24 0.62
MSH-32C 3/8" 5.78 2.89 1.44
10 mm 5.55 2.77 1.38
1/2" 4.4 2.2 1.1
5/8" 3.27 1.63 0.81

Structure

Outside diameter φ8

MSH_CFlexible Couplings - Spiral Slit Type

Outside diameter φ13 - φ32

MSH_CFlexible Couplings - Spiral Slit Type


Material/Finish

MSH
Main Body A7075
Anodized
Hex Socket Set Screw SCM435
Ferrosoferric Oxide Film (Black)
Hex Socket Head Cap Screw SCM435
Ferrosoferric Oxide Film (Black)

Characteristics

  • Recommended applicable motor
MSH
Servomotor
Stepping Motor
General-purpose Motor

◎: Excellent ○: Very good ●: Available

  • Property
MSH
Zero Backlash
Allowable Misalignment
Small Eccentric Reaction Force

◎: Excellent ○: Very good

  • 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.

Application

Transport devices / actuators / optical equipment / encoders

Precautions 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

MSH_CFlexible Couplings - Spiral Slit Type

Thrust Reaction Force

MSH_CFlexible Couplings - Spiral Slit Type


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