Our own Miniature Ballscrews – General Information

All our miniature ballscrews have an exceptionally high load rating – click on the following links for Technical Tables of our standard SAM, SCM and SEF versions.  We work to aerospace standards and are accredited to AS9100 Rev C.

Ballscrew dynamics and positioning accuracy primarily depend on the accuracy of production and the technical implementation of the specified tolerances.

Our standard Miniature Ballscrews are all designed and made in the UK under AS9100 Rev C and are supplied using Carbon Steel material hardened to 60 ±2 HRC. We can also manufacture in Stainless Steel where corrosion resistance is vital.

PGM Reball Part Numbering System

Thread Profile

diagram of gothic arch thread profile

Our miniature ballscrews have “Gothic Arch” thread profiles and with the optimal relationship of ball diameter to track radius this thread profile generates a contact angle between shaft and nut of around 45°.

This gives our ballscrews very favourable running characteristics at maximum axial loads. The ball track profiles for all our miniature ballscrews are ground after heat treatment using the most advanced machines.

Pre-loading

Our miniature ballscrews have “Gothic Arch” thread profiles and with the optimal relationship of ball diameter to track radius this thread profile generates a contact angle between shaft and nut of around 45°.

This gives our ballscrews very favourable running characteristics at maximum axial loads. The ball track profiles for all our miniature ballscrews are ground after heat treatment using the most advanced machines.

Tolerance Class

Our Ballscrews are manufactured to tolerance Class 3, 5 & 7 according to DIN 69051

Table of Axial Play Date

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