Oldham Couplings MJ series

Oldham Couplings

Inner diameter

seriesTorqueSet screw

Clamp

Clamp

FeaturesPrinciple

An Oldham coupling consists of 2 hubs and 1 intermediate
torque disc, classified as flexible coupling. It compensatesmisalignments by taking advantage of sliding convex andconcave configuration of hub and torque disc.

Misalignment

Large lateral misalignment compensation

Mounting and Dismounting Easy to mount and dismount with the aid of press fit design
Hub-Shaft Connection Set screw
Fixes a shaft by digging sets crews into the shaft directly
Clamp
Fixes a shaft using elastic deformation of hub notchby tightening cap screws
Flexibility

Variety of torque transmission characteristics can be achieved byvarious versions of torque discs

Consumable materials

Torque discs

Fail-Safe

Resin torque discs fracture to disengage troque transmission
when there is excessive overload

BacklashZero backlash except torque discs SA, A, AJ

Electric isolation Electrically isolated
Magnetic properties No magnetic properties except screws

Oldham Couplings MJ series

INNER
D I A .

LATERALANGULAR

ENDPLAY

STIFFNESSBACKLASH

KEYWAYPRESS FIT

Q T A

M T OCUSTOM

Oldham Couplings

Coupling size

+0.03

Inner diameter 0TorqueHubHub
Torque discSet screw

ClampT O R
Q U ESpecifications
Type Size

TorqueLateral misalignment Angular misalignment

EndplayInertia

Spring constant

MassDrawings

All through hole hubs
MJ-50 and 57 with keyways standard(JIS B13101-1996 )Blind hole hubs standard
MJ-19 and 25 available with throughhole hubs

Blind hole hubs standard
Available with through hole hubs

All through hole hubs
MJ-50，57 with keyways standard(JIS B13101-1996 )Dimensions
Type Size

Inner diameter Overall length Outer diameter Clearance

Max. mounting Min. mounting
lengthlength

KeywaysStandard

Overall length includes clearance
Size 50 and 57 available without keyways

Materials
Size

HubMaterials
Surface treatment
Free-cutting brass Non-chromium chemical
conversion treatment
Aluminum alloy

Anodization
Electroless nickel plating

Torque disc
Material

Polyacetal

Distance Distance Screw

Tightening
TorqueOldham Couplings MJ series

INNER
D I A .

LATERAL

ENDPLAY STIFFNESSANGULARBACKLASH

KEYWAYPRESS FITCUSTOM

M T O

Q T A

Oldham Couplings

type

Coupling size

Inner diameter G6
HubTorqueHub

Torque DiscDrawings

ClampT O R
Q U E

All through hole hubs

Specifications
Type Size

Inner diameter

TorqueLateral

AngularEndplay

Inertia

Spring constant

MassDimensions
Type Sizemounting
Inner diameter Overall length Outer diameter Clearance Max.length

Min. mounting
lengthOverall length includes clearance

Materials
Size

Hub

Torque disc

Materials
Surface treatment
Aluminum alloy Electroless nickel plating

Material
Polyacetal

Distance Distance

Screw

Tightening
Torqueseries

Torque Discs for
Oldham Couplings

Standard

Polyacetal resin
Blind holes

Polyacetal resin
Through holes

Nylon resin

Poly Ether
Ether Ketone

Standard

Easy to dismountVibration damping

Heat resistantSize：6 ~118

Size：19~118

Size：6~41※1
Size：6~88(118Zero backlash

Zero backlash

With backlash

Zero backlash

Aluminum alloy
Lubricant plating

Aluminum alloy
Nylon coating※2,3,4Rigid※3,4,5

Rigid, gall resistantSize：1 9~88

Size：19~118

With backlash

With backlash

MJ-118-T-PEEK is make to order.
Apply MoS2(molybdenum(IV) sulfide) contained grease to toque disc A to prevent galling.
For rigidity, select torque disc A for intermittent operation and AJ for continuous operation.
Torque disc A and AJ is recommended for vertical installation. Use thrust bearings to support the load.
Total lengh of torque disc AJ is 1mm longer than standard product due to the thickness of nylon coating.

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