Scanning for ideas: Spring preloads double-nut ball screw

January 24, 2008

The Series 1510 miniature precision ball screw from (Steinmeyer Inc., Burlington, Mass., comes with a double nut preloaded by a spring between the two nuts.

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This compensates for torque variations due to inaccurately ground threads. It also compensates for wear over time, so the ball screw continuously delivers smooth motion with near-constant idling torque. The standard nut has a cylindrical body with an attaching thread. It is available in diameters from 3 to 16 mm with pitches down to 0.5 mm.