Planetary Roller Screw Installation and Maintenance

Roller screw systems require little maintenance when compared to fluid power alternatives, such as hydraulic and pneumatic systems.


Roller screws are precision components and should be handled with care. Roller screws should be allowed to remain in their shipping crate or properly supported when stored.

CMC roller screws are shipped in sealed plastic, and the units should remain sealed until they are installed for use.


In some cases, the roller nut must be removed and re-installed on the shaft. In such cases, CMC can provide a custom fit mandrel to ensure that internal integrity of the roller screw assembly is maintained at all times during the assembly and disassembly process.

Screw Shaft End Design

Structural integrity of custom end features of the shaft designed per the customer’s specifications are the responsibility of the customer.

Starting up the Screw

After the assembly has been cleaned, mounted, and lubricated, it is recommended that the nut makes several full strokes at low speed. This allows installation and verification of limit switches or any other mechanism unique to the assembly prior to applying full load and operating at full speed.

Operating Temperature

Screws made from standard steels and operating under normal loads can sustain temperature ranges from –20 degrees Celsius (-4 degrees Fahrenheit) to +110 degrees Celsius (230 degrees Fahrenheit). If your screw will be operating outside of these temperature ranges, contact CMC.