• Couplings
  • Slit Type

Flexible Couplings - Slit Type - Clamping Type

MWSS-C

  • Zero Backlash
  • High Torque
  • Single-Piece Construction

Specs/CAD

Part Number ALWFGM Screw Tightening
Torque (N・m)
Standard Bore Diameter
D1-D2
Price
(USD)
CAD
Download
Add to Cart Additional Modification
MWSS-12C 12 5.2 14 2.6 4 M2 0.5 55.01 CAD Cart       
MWSS-16C 16 6.8 18 3.4 5 M2.5 1 56.09 CAD Cart       
MWSS-20C 20 7.65 20 3.8 6.5 M2.5 1 59.72 CAD Cart       
MWSS-25C 25 9.6 25 4.8 9 M3 1.5 72.91 CAD Cart       
MWSS-32C 32 12.6 32 6.3 11 M4 2.5 96.84 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
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.


Dimension Drawing

MWSS-CFlexible Couplings - Slit Type - Clamping Type寸法図

*1: E=D2(D2<6)

E=D2+0.5(D2≥6)

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

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

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.) -

◎: 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

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

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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