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topic 5451

Aluminum Surface Hardening


We have a printed circuit board driller which uses an aluminum rail as the guidance/support for the tooling table. The tooling table is supported by air shoes riding against the surface of the aluminum rail. The air shoes are also made of aluminum. If a shoe fails, it digs into the aluminum rail. What would be the best surface finish/plating to be applied to the rail in order to either eliminate or minimize damage to the rail in case of an air shoe failure?

Thanks in advance for your help.


Robert C. Crowe
electronic controls - Oliver Springs, Tennessee USA


Hard anodizing provides a good wear resistant finish for aluminum in many applications.

larry hanke
Larry Hanke
materials testing laboratory
Minneapolis, Minnesota

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