• Couplings
  • Slit Type

Flexible Couplings - Slit Type - Set Screw Type

MWS

  • Zero Backlash
  • Single-Piece Construction
  • Low Inertia

Specs/CAD

Part Number ALWFM Screw Tightening
Torque (N・m)
Standard Bore Diameter (Dimensional Allowance H8)
D1-D2
Price
(USD)
CAD
Download
Add to Cart Additional Modification
MWS-8 8 3.4 10 1.7 M2 0.3 21.30 CAD Cart       
MWS-12 12 5.2 14 2.5 M2.5 0.5 23.98 CAD Cart       
MWS-16 16 6.8 18 3 M3 0.7 26.21 CAD Cart       
MWS-20 20 7.65 20 3 M3 0.7 27.83 CAD Cart       
MWS-25 25 9.6 25 4 M4 1.7 32.17 CAD Cart       
MWS-32 32 12.6 32 6 M4 1.7 39.13 CAD Cart       

Part Number Max. Bore Diameter
(mm)
Rated
Torque*1
(N・m)
Max. Rotational Frequency
(min-1)
Moment of
Inertia
(kg・m2)*2
Static
Torsional
Stiffness
(N・m/rad)
Max. Angular
Misalignment
(°)
Max. Axial
Misalignment
(mm)
Mass
(g) *2
MWS-8 4 0.1 78000 1.0×10-8 24 1 ±0.1 1
MWS-12 6 0.4 52000 7.0×10-8 80 1 ±0.1 3.1
MWS-16 8 0.5 39000 2.8×10-7 180 1 ±0.2 7.4
MWS-20 10 1 31000 7.5×10-7 200 1 ±0.2 12
MWS-25 12 2 25000 2.3×10-6 780 1 ±0.2 24
MWS-32 16 4 19000 8.0×10-6 1100 1 ±0.2 50

*1: Correction of rated torque due to load fluctuation is not required.
*2: These are values with max. bore diameter.

Part Number Standard Bore Diameter (Dimensional Allowance H8)
D1・D2
MWS-8 2-2 3-3      
MWS-12 4-4 4-5 4.5-5 5-5  
MWS-16 4.5-5 5-5 5-6 6-6  
MWS-20 5-6 5-8 6-6 6-8 8-8
MWS-25 5-6 6-6 6-8 8-8 8-10
10-10        
MWS-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 additional modification is available on request. Please take advantage of our modification services.


Dimension Drawing

MWSFlexible Couplings - Slit Type - Set Screw Type寸法図

*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.

Structure

MWSS-CMade of all stainless steel

MWS/MWSS/MWS-C/MWSS-C_CFlexible Couplings - Slit Type

Clamping TypeMWS-CMWSS-C

MWS-CMade of aluminum alloy

MWS/MWSS/MWS-C/MWSS-C_CFlexible Couplings - Slit Type

Set Screw TypeMWSMWSS

MWS Made of aluminum alloy
MWSS Made of all stainless steel

MWS/MWSS/MWS-C/MWSS-C_CFlexible Couplings - Slit Type


Material/Finish

MWS
Main Body A2017
Anodized
Hex Socket Set Screw SCM435
Ferrosoferric Oxide Film (Black)
Hex Socket Head Cap Screw SCM435
Ferrosoferric Oxide Film (Black)

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.) -

◎: Excellent ○: Very good

  • Recommended Applicable Motor
MWS MWSS
Servomotor
Stepping Motor
General-purpose Motor

◎: Excellent ○: Very good ●: Available


Application

Transport device / XY stage / Parts feeder

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.

MWS/MWSS/MWS-C/MWSS-C_CFlexible Couplings - Slit Type

MWS/MWSS/MWS-C/MWSS-C_CFlexible Couplings - Slit Type

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

MWS/MWSS/MWS-C/MWSS-C_TTechnical Information

MWS/MWSS/MWS-C/MWSS-C_TTechnical Information


Change in static torsional stiffness due to temperature

MWS/MWSS/MWS-C/MWSS-C_TTechnical Information

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.

MWS/MWSS/MWS-C/MWSS-C_TTechnical Information


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