Scanning for ideas: Spring preloads double-nut ball screw
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.
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.