Introduction

As ballscrews are an indispensable element in today's machinery and apparatus construction, Steinmeyer has developed a wide program of standard ballscrews for various purposes. This catalog shows standard sizes from a nominal diameter of 16 mm through 63 mm.

For miniature ballscrews with nominal diameters ranging from 3 to 16 mm, a separate catalog is available. We edited this catalog to best suit the demands of the users, hence it is divided into two sections, providing you with a broad selection of technical background and design hints, and a listing of standard ballscrew designs, respectively. This catalog is not intended to include all possible designs, and Steinmeyer will design any reasonable ballscrew according to your requirements. Our engineering service is available to users worldwide through our distribution partners, and we shall be glad to discuss your requirements, providing you with the best ballscrew solution available.

General Properties
Ballscrews provide power transmission from rotational to linear motion, or vice versa. Their main properties are high efficiency, durability and high precision. Steinmeyer has improved the basic design by introducing many detailed solutions to improve performance of this product. Modern industrial requirements are increased speeds, reliability and precision along with better economics, detailed design has changed reasonably. In general, every ballscrew shows an efficiency of approx. 90%, due to rolling ball contact between screw and nut. The demands today however, are more complex than simply transforming a rotational movement into a linear movement.

Thread Profile
Steinmeyer ballscrews use a very complex profile of thread grooves on the screw and inside the nut. It is designed to meet the requirements of increased stiffness, smooth motion and low friction. These profiles, developed from the so-called "gothic arc"

profile, allow for optimum control of contact angle, track conformity and backlash of single nuts.

Ball Return
In general, Steinmeyer exclusively uses Internal Recirculation of the balls. Ball deflectors, manufactured in a special, computer controlled milling process from brass, provide smooth motion and less wear on balls than external systems do. The balls follow a CAD designed arc when crossing the screws major diameter to enter the next thread groove, and are held in close contact with the screw surface.
The extreme low profile of our ball return inserts allows for nuts to be designed in very small dimensions. This enables the use of larger screw nominal diameters, maintaining the same nut outter diameter, compared with conventional tube return nuts.