Page 7 of catalogue Rail guide tables of SKF Linearsysteme GmbH

Cover
The slides with ball screw and linear motor drive are available as follows: • With bellows made of oil and water resistant polyurethane fibre material on both sides. The carriages and ballscrew nut are additionally protected by wipers (with the exception of the SH Screws). The screw thrust bearings are also sealed. • Without cover for applications without exposure to dirt, e.g. in

laboratories. The carriages, ballscrew nut and bearings are sealed as they are in the bellows version. The effective stroke is, of course, longer than in the bellows version. • With steel cover, made from corrosion resistant steel sheet, for applications with extreme exposure to dirt from above or for those applications where shock impacts on the cover cannot be excluded. The effective stroke is as long as in the version without cover.

Precision classes
The characteristics of the different precision classes are listed in the table below. The precision given in diagram 1 applies to a single table in clamped condition on an ideal plane clamping surface.

Straightness defined as in VDI 2617 sheet 3.

Diagram 1: Precision
150 P10

100

Straightness Tz/Ty [μm]

P5 50 P2 P1

0 100 300 500 700 900 1 100 1 300 1 500 1 700 1 900 2 100 2 300 2 500

Stroke [mm]

7