4.1 Precautions for maintenance and inspection work
4-2
4. Maintenance and Inspection
Caution
The grease film may run out if the actuator performs return operation continuously over a
distance of 30mm or less. As a guideline, every 5,000 to 10,000 cycles, have
approximately 5 cycles of return operation over a 50mm distance or more to regenerate
the oil film.
The ball screw or guide may be damaged if the oil film runs out.
Notice
● First, be sure to wipe off the old grease, and then supply new grease.
● The degradation speed of grease may differ depending on the operating environment
(temperature, humidity and ambient atmosphere).
It is recommended to shorten the grease supply period if the actuator is used under poor
environmental conditions such as high temperatures, high humidity or dusty
atmospheres.
● Also, it is recommended to improve the environmental conditions in case the grease
changes color notably due to poor operating conditions.
● Base oil may separate from the grease due to the mounting orientation or operating
conditions.
Base oil may also leak from the inside of the actuator to the exterior through gaps.
Check visually for oil drips when supplying grease.
● An actuator stored for 6 months or more may suffer from grease degradation.
Supply grease before the start of use.
→For details, refer to "4.5 Greasing method".
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