Omron OMNUC G User Manual page 185

When connecting to a V-belt or timing belt, consult the manufacturer for belt selection and tension.
A radial load twice the belt tension will be placed on the motor shaft. Do not allow a radial load
exceeding specifications to be placed on the motor shaft. If an excessive radial load is applied, the
motor shaft and bearings may be damaged.
Set up a movable pulley between the motor shaft and the load shaft so that the belt tension can
be adjusted.
Water and Drip Resistance
The protective structure for the Servomotors is as follows:
IP65 (except for through-shaft parts and cable outlets)
Pulley
Belt
Tension
4-1 Installation Conditions
Tension adjustment
(Make adjustable.)
4
4-4