ball screw


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ball screw

[′bȯl ‚skrü]
(mechanical engineering)
An element used to convert rotation to longitudinal motion, consisting of a threaded rod linked to a threaded nut by ball bearings constrained to roll in the space formed by the threads, in order to reduce friction.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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The Elject EP5 Real Mini has an injection unit with a center direct-drive system in which the screw is an extension of the ball screw that is driven by a servomotor.
The ATS 165 Series hard-cover linear ball screw stage also features:
The upper lip gap is adjusted with a ball screw, ramp, and cam; the forming cone air is adjusted with a disc cover moved by.
The nominal life is the number of revolutions (or the number of operating hours at a given constant speed) that the ball screw or roller screw can perform before the first sign of fatigue (flaking or spalling) appears on one of the rolling surfaces (screw, nut or rolling elements).
A special model SE100D (110 tons) was shown with an extra-large servo motor and ball screw that raise injection speeds to 800 mm/sec.
* A precision-grade C10 ball screw diameter(12 to 20 mm) and lead (4 to 20 mm).
As part of its cyber dynamic line product series, Wittenstein cyber motor has launched a new series of linear actuators designed with an integrated ball screw for use in highly dynamic positioning axes.
In the early 1940's, the company would achieve another milestone when successfully developing the world's first aircraft ball screw product, which was utilised on the B-29 "Superfortress".