The Shop > Metal Stuff

Scraping a surface plate. Where to start ?

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vtsteam:
Wouldn't you use a longer straightedge rather than a larger surface plate, assuming any size to the first one? Unless you have llfting tackle for the rub.

JHovel:
For a surface plate I would use another larger surface plate. Yes, liftinhg tackle may be required - or a helper.
Staightedge is useful for checking.measuring geometry of surfaces to each other or narrow long slides.
Joe

krv3000:
hi well just nick the bathroom mirror or the glass kitchen table put blue on it put it on top of your plate give it a  rub and all the hi spots will be marked  and go from there

DavidA:
Joe,

I was assuming that the person scraping had no access to another plate and would have to start from scratch; or should that be scrape.

I  have a large(ish) piece of plate glass that could be used as per krv3000.

A long time ago I contemplated grinding a ten inch parabolic mirror. Wisely this idea was put in the 'maybe later' file.

My own surface plate seems to be pretty good. At least for the stuff I do. But I do have a source of sg iron that could be milled into 5" squares for practicing on.

One more thing to pass the time.

Dave.

vtsteam:
jhovel are you a scraper hand?

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