Technical Data  Reducers  Small-Size Gear Motor  Handling

This section describes general use of gear motors, hypoid motors, and croise motors.

For more information, see the instruction manual provided with the product.

Torque arm design

Whether a standard torque arm is used or whether you design and make a torque arm, check the strength of each element in the following manner.

1. Check the torque arm and fixing bolt

Check according to the torque arm reaction force R.

R = T + W × G C

2. Selection of bearing

Check according to the bearing reaction forces A and B.

A(Bearing a) = L1 × (R - W) - D × R L2

B(Bearing b) = (L1 + L2) × (R - W) - D × R L2

  • T：Output torque N・m{kgf・m}
  • W：Weight of reducer kg{kgf}
  • R：Torque arm reaction force kg{kgf}
  • G：Distance between center of driven shaft and center of gravity of reducer m
  • C：Distance between center of driven shaft and rotation stopper m
  • D：Distance between center of reducer and rotation stopper m
  • L1：Distance between center of reducer and bearing b m
  • L2：Distance between bearing a and bearing b m

*For the direction of rotation shown in the figure to the left, the output torque is positive. When it is reversed, the output torque is negative.

Dimensions when optional torque arm is used (These are approximate values. )

Also applies to adapter and inline reducer types.
Model number G
HMTA010-30H5～35H1200
HMTA020-30H5～200
HMTA020-45H600～1200
HMTA040-55H600～1200		 0.10m
HMTA020-35H300～480
HMTA040-30H5～35H200
HMTR220-45H5～55H120		 0.12m
HMTR075-35H5～55H480
HMTR150-55H100～200		 0.13m
HMTA040-45H300～480
HMTR150-45H5～80
HMTR370-55H5～60FI		 0.15m
HMTR550-55H5～40FI 0.26m
Bearing