Monday 18th June 2018

Satellite roller screw for greater thrust

Phil Jones, of ABSSAC says“ lead screws and ball screws have a legitimate use in the market place, but should the application require extreme positional accuracy or perhaps high acceleration forces and rotational speeds, then the satellite roller screw products might be a better solution. Offering a standard, as well a bespoke range of products, ABSSAC has worked on numerous applications through the years where standard lead and ball screw designs just can not compete.

Applications to date have included flight critical aerospace apparatus, medical operating equipment and advanced machine tool operations, in some cases complete hydraulic systems have been replaced with intelligent motor control and roller screw linear movement. 

A satellite roller screw employs matched rollers to rotate (or satellite as the product name suggests) around the screw thread during actuation instead of ball bearings. By design, there is an immediate increase in the physical amount of contact points on the screw that can support a load compared with that of the same diameter ball screw. The satellite roller screw is therefore primarily chosen as part of a transition within a new or existing design to achieve greater load capacity and greater linear positional accuracy, in the smallest envelope space.

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