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Linear Motion Tips

Covering Linear Motion Systems, Components and Linear Motion Resources

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Gallery: Crossed-roller slide variations and uses

★ By Lisa Eitel Leave a Comment

← PREVIOUS PAGE || Usually a third element — a cage — keeps the rollers well-spaced (which in turn prevents excess friction in the form of skidding or poor performance due to roller-to-roller contact).

Cages wrap around crossed-roller guide rollers to maintain their spacing — and prevent skidding, premature wear, and failure. Various anti-creep mechanisms prevent cage creep. Shown here is a Schneeberger crossed-roller guide that uses a rack and pinion feature to maintain cage position.

Composite or engineered-plastic cages let rollers space more tightly together, so more rollers fit into the crossed-roller guide assembly for a given stroke length … and that in turn increases load capacity.

In contrast, cages made of aluminum or other metal take more space and reduce the guide roller count for a given length, but are often the only suitable choice for harsh environments or applications operating in cleanrooms or vacuums. That’s because composites are sensitive to contamination and can contaminate controlled environments with outgassing.

While indispensable, crossed-roller guide cages can exhibit what’s called cage creep …

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Filed Under: Crossed-roller slides, Featured, Slides + guides (all)

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