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.
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References in periodicals archive ?
The S-HTF ball screw has been designed for high-load applications, such as those found in plastic injection-moulding machines and forming presses.
A ball screw, also referred to as a ball screw linear actuator, translates rotation into linear movement.
A ball nut assembly (BNA) consists of a ball screw and nut.
Ball screw feed drives are frequently used to position the spindle (or stage) to the desired location due to their high stiffness and accuracy.
Both ball screw and nut treated to a surface hardness of 56 HRC.
According to the contracts, Beaver will supply horizontal stabilizer ball screw assemblies for the Bombardier Global 7000 and Bombardier Global 8000 ultra-long-range jets.
Their mechanical ball screw lifting mechanisms provide an inching capability that enables the lifts to aid in the replacement of components that are installed from below.
The ECG-HD linear drive features two guide rails and is available with a toothed belt or a ball screw drive in three widths--125mm, 160mm and 220mm--giving stroke lengths of up to 5000mm for the toothed belt version and 2400mm for the ball screw option.
Gear beads, motors, encoders and controllers from Maxon's standard program are used to drive the spindles, which are available in a metric M6 spindle with a self-locking function or a 5-millimeter ball screw with no self-locking feature.
The actuator allows increased efficiency and greater reliability for shift-by-wire application by incorporating a ball screw technology that is more efficient and compact than conventional products.
The addition of ball screw choices improves the force range of the ERD up to 200 lb.