MDW

Merits

High Torsional Stiffness, High Response
Zero Backlash

Disk type flexible coupling
Double stainless steel disks absorb parallel, angular misalignments and shaft end-play
Identical clockwise and counter-clockwise rotational characteristics
Finished products featuring two different end bore diameters available in stock

Application

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

Features

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

A : Excellent B : Very Good

For the ultimate high torque, high torsional stiffness, high response performance, take a look at the flexible disk coupling XBW.
Eccentric Reaction Force / Thrust Reaction Force / Changes in Static Torsional Stiffness Caused by Temperature / Static Torsional Stiffness Comparisons [PDF 132KB]

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	E	F	G	M	Wrench Torque (N·m)
MDW-19C	19	8	27	8.5	2.5	6.5	M2	0.5	MDW19C.dxf	MDW19C
MDW-25C	25	10	31	12.5	3.5	9	M2.5	1	MDW25C.dxf	MDW25C
MDW-32C	32	12	40	16	4	11	M3	1.5	MDW32C.dxf	MDW32C
MDW-40C	40	14	44	21	5	15	M4	2.5	MDW40C.dxf	MDW40C
MDW-50C	50	18	57	26	6	18	M5	7	MDW50C.dxf	MDW50C
MDW-63C	63	20	61	35	7	24	M6	12	MDW63C.dxf	MDW63C

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 Eccentricity (mm)	Errors of Angularity (°)	Errors of Shaft End-Play (mm)	Mass^* (g)
MDW-19C	8	0.7	1.5	33000	8.7x10^-7	200	0.12	1.5	±0.5	18
MDW-25C	12	1	2	25000	2.7x10^-6	450	0.12	1.5	±0.5	25
MDW-32C	15	2.5	5	19000	9.6x10^-6	1100	0.15	1.5	±0.5	60
MDW-40C	20	3.5	7	15000	1.9x10^-5	1400	0.15	1.5	±0.5	100
MDW-50C	25	9	18	12000	8.1x10^-5	2200	0.15	1.5	±0.5	210
MDW-63C	30	12.5	25	10000	2.1x10^-4	3000	0.15	1.5	±0.5	340

*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
MDW-19C	Compliant
MDW-25C	Compliant
MDW-32C	Compliant
MDW-40C	Compliant
MDW-50C	Compliant
MDW-63C	Compliant

●All products come with cap screws.
●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].