MJC-55-GR-3/8-12

Part Number	Max. Bore Diameter (mm)	Rated Torque＊1 (N・m)Rated Torque＊1 (lbf in.)	Max. Torque＊1 (N・m)Max. Torque＊1 (lbf in.)	Max. Rotational (min-1)	Moment of Inertia＊2 (Kg・m2)Moment of Inertia＊2 (oz. in.2)	Static Torsional Stiffness (N・m/rad)Static Torsional Stiffness (lbf in./deg)	Max. Lateral Misalignment (mm)Max. Lateral Misalignment (in.)	Max. Angular Misalignment (°)	Max. Axial Misalignment (mm)Max. Axial Misalignment (in.)	Sleeve Hardness	Mass＊2 (g)Mass＊2 (oz)
MJC-55-GR-3/8-12	32	75663.75	1501327.5	11000	1.6×10-48.748	90001390.14	0.080.003	1	0～+ 1.40～+ 0.055	D64	32011.29

＊1：　Correction of rated torque and max. torque due to load fluctuation is not required.However, if ambient temperature exceeds 30°C, be sure to correct the rated torque and max. torque with temperature correction factor shown in the table.MJC's allowable operating temperature is -20°C to 60°C.
＊2：　These are values with max. bore diameter.

Structure

Set Screw Type MJC-BLMJC-WHMJC-RDMJC-GRMJC-EBLMJC-EWHMJC-ERDMJC-EGR

MJC-＊＊-＊＊Tight Fit
MJC-＊＊-E＊＊Easy Fit

Clamping Type MJC-CS-BLMJC-CS-WHMJC-CS-RDMJC-CS-GRMJC-CS-EBLMJC-CS-EWHMJC-CS-ERDMJC-CS-EGR

MJC-＊＊CS-＊＊Tight Fit
MJC-＊＊CS-E＊＊Easy Fit

Set Screw + Key Type MJC-K-BLMJC-K-WHMJC-K-RDMJC-K-GRMJC-K-EBLMJC-K-EWHMJC-K-ERDMJC-K-EGR

MJC-＊＊K-＊＊Tight Fit
MJC-＊＊K-E＊＊Easy Fit

Clamping + Key Type MJC-CSK-BLMJC-CSK-WHMJC-CSK-RDMJC-CSK-GRMJC-CSK-EWHMJC-CSK-ERDMJC-CSK-EGR

MJC-＊＊CSK-＊＊Tight Fit
MJC-＊＊CSK-E＊＊Easy Fit

Sleeve

Material/Finish

Characteristics

• Applicable motors

• Property

• This is a jaw type flexible coupling.
• Tight Fit enables transmission with zero backlash at low torque.
• Easy fit allows you to assemble and partition the hub and sleeve smoothly.
• Excellent flexibility allows eccentricity, angular misalignment and twisting vibration to be accepted.
• It has electrical insulation. Resistance value: Not less than 2 MΩ
• There are four types of sleeve hardness. Please select desirable units according to usage conditions including torque and misalignment.

• Sleeve Type

Selection

Selection based on shaft diameter and rated torque

The area bounded by the shaft diameter and rated torque indicates is the selection size.

Selection Example

In case of selected parameters of shaft diameter of φ15 and load torque of 6 N•m, the selected size for [MJC-＊＊-RD, MJC-＊＊-ERD is MJC-30-RD, MJC-30-ERD.

Selection based on the rated output of the servomotor

Selection Example

In case of motor specification of shaft diameter of φ9 and rated torque of 0.64 N•m, the selected size of MJC-＊＊-BL is as follows.
Set Screw Type ----MJC-30-BL
Clamping Type ----MJC-30CS-BL
Set Screw + Key Type ----MJC-30K-BL
Clamping + Key Type ----MJC-30CSK-BL

Ambient Temperature / Temperature Correction Factor

Sleeve Details

Tight Fit

The hub and sleeve are press-fit and can be used under zero backlash＊1.Since the sleeve's vibration absorption can raise the gain of a servomotor, this unit can achieve high responsive operation exceeding the Disk coupling.

Easy Fit

This unit allows you to easily assemble and partition the hub and sleeve. This allows you to reduce the time of assembling the unit and maintenance.It is possible to mount a hub on the shaft in advance and easily assemble the unit even in a location where the coupling is less-visible.

Slip torque

Concerning the sizes shown in the table, please note that the shaft's slip torque is smaller than the max. torque of MJC-CS.Concerning the sizes shown in the table, please note that the shaft's slip torque is smaller than the max. torque of MJC-CS.

Change in static torsional stiffness due to temperature

This is a value under the condition where the static torsional stiffness at 20°C is 100%.
The change of torsional stiffness within the range of allowable operating temperature is as shown in the graph.
Before using the unit, be aware of the deterioration of responsiveness.

Eccentric Reaction Force