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Thin Dense Chrome on type 52100 Steel

Two questions, appreciate the help

- Rack Marks - Why sometimes you would see larger marks than other times. I understand contact point condition, but does Chrome build up around rack points and maybe under?

- Is TDC film conductive?

Thanks

Jeb Bo
Manufacturing - Florence, South Carolina, USA
June 14, 2010

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July 15, 2010

Jeb,

I can't really answer your query on the rack marks as I would really need to see the practical side of things. If they are being done by the same people all the time then it would be unusual to have variable jig marks, but if you use multiple suppliers then it wouldn't be unusual to see variation in the jig marks.

Thin dense chrome is conductive. There is nothing especially different about the TDC compared to hard engineering or decorative chrome. The plated chrome is still in the metallic state.

Brian Terry
Aerospace - Yeovil, Somerset, UK