Slit Type Flexible Coupling

MWS Setscrew Type

Merits

Zero Backlash

Design changes in the aluminum alloy's slit pattern have improved performance
One-piece metallic spring coupling
Absorption of angular misalignments and shaft end-play by spring action
Parallel misalignment is not absorbed
High torsional stiffness and response
Identical clockwise and counter-clockwise rotational characteristics
Available in aluminum alloy and stainless steel
Finished products featuring two different end bore diameters available in stock
We produce clean washed, single piece specialty couplings constructed of SUS304 steel for special environment use Please inquire for price and delivery time

Application

Servomotor	-
Stepping Motor	A
General-purpose Motor	-
Encoder	-

Features

Zero Backlash	A
High Torsional Stiffness	B
High Torque	B
Absorption of Misalignment	-
Vibration Absorption	-
Electrical Insulation	-
Corrosion Resistant (All Stainless Steel)	A

A : Excellent B : Very Good

Thrust Reaction Force / Changes in Static Torsional Stiffness Caused by Temperature / Slip Torque [PDF 362KB]

Configuration & Material

*Stock screws can be replaced with stainless steel screws. Please take advantage of our stainless steel screw option.
For more information please refer to Stainless Steel Screws [PDF 256KB].

Dimensions

unit:mm
Catalog Number	A	L	W	F	M	Wrench Torque (N·m)
MWS-8	8	3.4	10	1.7	M2	0.3	MWS8.dxf	MWS8
MWS-12	12	5.2	14	2.5	M2.5	0.5	MWS12.dxf	MWS12
MWS-16	16	6.8	18	3	M3	0.7	MWS16.dxf	MWS16
MWS-20	20	7.65	20	3	M3	0.7	MWS20.dxf	MWS20
MWS-25	25	9.6	25	4	M4	1.7	MWS25.dxf	MWS25
MWS-32	32	12.6	32	6	M4	1.7	MWS32.dxf	MWS32
MWSS-8	8	3.4	10	1.7	M2	0.3	MWSS8.dxf	MWSS8
MWSS-12	12	5.2	14	2.5	M2.5	0.5	MWSS12.dxf	MWSS12
MWSS-16	16	6.8	18	3	M3	0.7	MWSS16.dxf	MWSS16
MWSS-20	20	7.65	20	3	M3	0.7	MWSS20.dxf	MWSS20
MWSS-25	25	9.6	25	4	M4	1.7	MWSS25.dxf	MWSS25
MWSS-32	32	12.6	32	6	M4	1.7	MWSS32.dxf	MWSS32

Specifications

Catalog Number	Max. Bore (mm)	Rated Torque (N·m)	Max. Torque (N·m)	Max. Rotational Frequency (min^-1)	Moment of Inertia^* (kg·m²)	Static Torsional Stiffness (N·m/rad)	Errors of Angularity (°)	Errors of Shaft End-Play (mm)	Mass^* (g)
MWS-8	4	0.1	0.2	78000	1.0x10^-8	24	1	±0.1	1
MWS-12	6	0.4	0.8	52000	7.0x10^-8	80	1	±0.1	3.1
MWS-16	8	0.5	1	39000	2.8x10^-7	180	1	±0.2	7.4
MWS-20	10	1	2	31000	7.5x10^-7	200	1	±0.2	12
MWS-25	12	2	4	25000	2.3x10^-6	780	1	±0.2	24
MWS-32	16	4	8	19000	8.0x10^-6	1100	1	±0.2	50
MWSS-8	4	0.2	0.4	78000	2.4x10^-8	49	1	±0.1	2.7
MWSS-12	6	0.3	0.6	52000	1.8x10^-7	140	1	±0.1	7.8
MWSS-16	8	0.5	1	39000	7.2x10^-7	240	1	±0.1	18
MWSS-20	10	1	2	31000	2.0x10^-6	330	1	±0.1	32
MWSS-25	12	2	4	25000	6.1x10^-6	720	1	±0.2	63
MWSS-32	16	3.5	7	19000	2.1x10^-5	1300	1	±0.2	130

*Adjustment of rated and maximum torque specifications for load fluctuations is not required.
For more detailed information, please refer to Selection Guidelines [PDF 171KB].
**Based on the maximum shaft bores.

Stock Bores

Catalog Number	RoHS	Stock Bores D₁·D₂
MWS-8	Compliant
MWS-12	Compliant
MWS-16	Compliant
MWS-20	Compliant
MWS-25	Compliant
MWS-32	Compliant
MWSS-8	Compliant
MWSS-12	Compliant
MWSS-16	Compliant
MWSS-20	Compliant
MWSS-25	Compliant
MWSS-32	Compliant

●All products come with setscrews.
●Hubs with shaft bore diameters of φ4 or less have one setscrew.
●Recommended tolerance on shaft diameters is h6 and h7.
●Bore and keyway modifications are available on request. Please take advantage of our bore modification services.
For more information please refer to Custom Bore Modifications [PDF 495KB].