wquiles
Well-Known Member
Watching videos in youtube I ran across a machinist that was doing the machining and grinding on his new machinist square from Windy Hill Foundry:
Windy Hill Foundry
This is a photo on their web site of the unfinished "as cast" square, and a finished/machined one on the left:
I ordered one with the initial idea to do the machining myself, but since I don't have grinding equipment/ability, I decided to have the machinist that works with the Foundry do the work instead. Man, I am happy I did.
I checked on my granite plate against my only good machinist square - a small 3"x2" tmx:
I checked with my angle meter and got exactly 90.0 deg:
I finally measured at each end and on the center of the square with my micrometer and got 0.7963", 0.7964", and 0.7966" - that is only 0.0003" thickness variation. Plenty good for me
They recommend that I tape the ground surfaces, blast the inner surface a little to remove any rust remains, and paint it. Then remove the tape, and maintain it lightly oiled to prevent rust.
Windy Hill Foundry
This is a photo on their web site of the unfinished "as cast" square, and a finished/machined one on the left:
I ordered one with the initial idea to do the machining myself, but since I don't have grinding equipment/ability, I decided to have the machinist that works with the Foundry do the work instead. Man, I am happy I did.
I checked on my granite plate against my only good machinist square - a small 3"x2" tmx:
I checked with my angle meter and got exactly 90.0 deg:
I finally measured at each end and on the center of the square with my micrometer and got 0.7963", 0.7964", and 0.7966" - that is only 0.0003" thickness variation. Plenty good for me
They recommend that I tape the ground surfaces, blast the inner surface a little to remove any rust remains, and paint it. Then remove the tape, and maintain it lightly oiled to prevent rust.
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