The fixing holes in the seat-engaging surfaces in case of longitudinal guidances, which are ground together, should be centre-bored after the rail holes. By using special fixing screws the differencies of the distances of the holes can be compensated in most cases. The sides with the hollow spots may not be used as seat-engaging surfaces.
Fins occurring with the drilling will be removed with a fine rubstone in order to obtain a perfect seat-engagement of the ERO-longitudinal guidances.
Before embedding the longitudinal guidances are to be perfectly cleaned.
They are protected against corrosion with light lubricating.
The firm longitudinal guidance pair (1) is pressed with an appropriate gripping element against the bearing surface and the fixing screws are pulled tight.
The parallelism of the firm longitudinal guidance pair is checked. The measured parallelisms must be lying within the tolerances of longitudinal guidances.
Mount the firm longitudinal guidance (2).
Mount feed rail (3) and tighten fixing screws but slightly. Pull in cages with roll bodies and position precisely. Mount end pieces and eventual strippers.
Adjust guidance free from backlash (according to chapter 2) and tighten the fixing screws of the feed rail.
Prestress of antifriction slideways
The adjustment free from backlash of a guidance is normally effected by means of regulating screws. An equal zero backlash process is only reached, if the feed-in is exclusively made, where the roll bodies are located.
When using regulating screws one regulating screw must be used per each fixing screw of the rail. The thread of the regulating screw should correspond with the thread of the ERO longitudinal guidance.
The adjustment free from backlash of an ERO antifriction slideway can be effected in a more sensible way, if the own weight is compensated by lifting.