MJT couplings combine the features of a metallic spring coupling with zero backlash and a flexible coupling with an elastic rubber sleeve.
Therefore, MJT couplings can be used for rotational angle transmission with zero backlash and for torque transmission.
There are three different types of sleeves with different hardness.
Check the following points for proper selection of MJT couplings.

  1. Zero Backlash Transmission
    In applications where rotational angle transmission and motion control at low torque are needed, MJT couplings can be used like metallic spring couplings with zero backlash. In addition, MJT couplings can absorb torsional vibration, which other zero backlash couplings can not absorb. The permissible torque in zero backlash applications is smaller than the rated torque mentioned in the specification tables. Please refer to the table
    below Any of the three different sleeves have the same permissible torque in zero backlash applications, however, the harder the sleeve the better the response of angular transmission. You may select the best sleeve for your requirments, referring to the static torsional stiffness in the table below or the specification tables.
  2. Torque Transmission
    MJT, a compression coupling, can generally transmit higher torque than metallic spring couplings, and this coupling can be recommended for the applications of general industrial machinery like pumps, where backlash is acceptable. The rated and maximum torque of blue, white and red sleeves are respectively low, medium and high, while the permissible misalignment of blue, white and red sleeves are respectively large, medium and small. You may select the most suitable sleeve for your application. For torque transmission applications, we recommend an MJT with keyway（MJT-**K）or an MJT with clamp hub and keyway（MJT-**CK）for safe and sure shaft attachment.

 

Product Code Hardness
of Sleeve*
(JIS A)		 Zero Backlash
Permissible Torque
(N·m)		 Rated
Torque*
(N·m)		 Max.
Torque*
(N·m)		 Static Torsional
Stiffness
(N·m/rad)		 Errors of
Eccentricity
(mm)		 Errors of
Angularity
(°)		 Errors of Shaft
End-Play
(mm)
MJT-14 BL 80 0.1 0.7 1.4 8 0.15 1.0 +0.6
0
WH 92 1.2 2.4 14 0.10
RD 98 2 4 22 0.10
MJT-20 BL 80 0.2 1.8 3.6 16 0.20 1.0 +0.8
0
WH 92 3 6 29 0.15
RD 98 5 10 55 0.10
MJT-30 BL 80 0.5 4 8 46 0.20 1.0 +1.0
0
WH 92 7.5 15 73 0.15
RD 98 12.5 25 130 0.10
MJT-40 BL 80 1.2 4.9 9.8 380 0.15 1.0 +1.2
0
WH 92 10 20 570 0.10
RD 98 17 34 1200 0.10
MJT-55 BL 80 - 17 34 1400 0.20 1.0 +1.4
0
WH 92 35 70 1600 0.15
RD 98 60 120 2600 0.10
MJT-65 BL 80 - 46 92 2800 0.20 1.0 +1.5
0
WH 92 95 190 3000 0.15
RD 98 160 320 4900 0.10
MJT-80 BL 80 - 95 190 3200 0.20 1.0 +1.8
0
WH 92 190 380 5300 0.15
RD 98 325 650 6500 0.10
MJT-95 BL 80 - 130 260 3600 0.20 1.0 +2.0
0
WH 92 265 530 6200 0.15
RD 98 450 900 8900 0.10

* Durometer Hardness（Shore A）.
*Adjustment of rated and maximum torque specifications for load fluctuations is not required. However, if operating temperature exceeds 30℃,
please adjust rated torque and maximum torque as detailed in the table below.
The operating temperature range for MJT is -20℃~60℃. For more detailed information, please refer to Making Your Couplicon® Selection.