Speed for Ball Screws

Ball velocity in a Ball Screw should not exceed 3,000 rpm x in. (rotational speed (rpm) times the nominal diameter (in.)).

For example, a 3/4 x .200 size Ball Screw should be limited to 4,000 rpm (3,000/.750 = 4,000 rpm). For applications requiring speeds beyond 3,000 rpm x in., use a larger lead, a larger diameter, or contact Roton Application Engineering. Freewheeling Ball Screws work best at 350 rpm and less.

This limit is imposed by the dynamic action of the stop pins contacting the ball retainer.

For operation of Freewheeling Ball Screws beyond 350 rpm, contact Roton Application Engineering. In addition to the above guidelines, each screw drive system should be evaluated for safe rotational speed so that natural frequency vibrations are avoided (see Critical Speed section).