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A junkyard lathe and mill tool grinder

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Arbalist:
Nice job, good looking thread!

vtsteam:
Today I thought I'd try a new experiment with this tag sale sander. First step was to blue up one of the slide pieces, and mark a line 1-1/2 degrees off square. I decided to do this using a little math since that's a pretty small angle to mark with a protractor.

The piece measured 2.10" long, and I wanted to know how far out to make a mark at one end to yield a 1-1/2 degree angle. I figured the tangent function would do it. With the pocket calculator TAN of 1.5 degrees x 2.1 = .055. So I needed to make a mark .055" in from one end, and then connect it to the other end. This is what it looked like:

vtsteam:
Then I started filing to the line. I could have milled it, but I don't have a rotary table, and by the time I set up the mill and got that heavy vise over to 1-1/2 degrees, set the cutter height and did edge finding, etc.....well it was a lot quicker and easier to just file it  to the line. I might have spent 5 minutes total -- and it was nice doing it outside in the sun on this unusually cool day.

vtsteam:
I bought a barrel of aluminum scrap at an auction once, and there were a lot of one inch square bar cutoffs -- maybe from a screw machine room.  I took one of the aluminum blocks and another strip of 1/8" by 1/2" steel, and positioned them to space the new strip an inch away from the one I just filed, and parallel with it. I clamped the steel strip down with a welder's clamp.

vtsteam:
Then I removed the spacer block and spot welded the new strip in place:

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