Original NBK JMC Series Flexible Couplings MJC-40CS-ERD-20-20 Made in Japan

Temperature correction factor
For couplings that use rubber or resin, the rated torque and maximum torque may vary depending on the operating temperature (excluding MSXP, MOP, and MOHS).
If the ambient temperature exceeds 30 °C, apply the correction factors shown in the table below to both the rated torque and maximum torque.
Ambient temperature
Temperature correction factor
-20℃～30℃ 1.00
30℃～40℃ 0.80
40℃～60℃ 0.70
60℃～120℃ 0.55
Note that the correction factors can only be applied within the allowable operating temperature range of each coupling.
For details on operating temperature, please refer here.

For all-metal couplings, as well as MSXP, MOP, and MOHS, the effect of temperature on torque reduction is minimal, thus, no correction using this table is required.

Rotation Diameter
Rotation diameter refers to the larger of the coupling outer diameter (φA) or the diameter with the bolt head protruding (φA1)while rotating.
When using couplings in narrow spaces, pay attention to the rotation diameter. Refer to the table below for rotation diameter details.
The rotation diameter is calculated based on the reference dimensions.
As it fluctuates according to tolerance, build a margin into your design values.


Rotation diameter (by coupling type)
Moment of Inertia
This is a value that indicates the rotational difficulty of Couplicon®.
Smaller moment of inertia reduces the load torque at the time of start and stop.
Damping ratio
This is a parameter that represents the damping property of vibration amplitude.

XGT2XGL2XGS2 have a large damping ratio, thus enabling the servomotor gain to be raised