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scrapers from old files

I have started grinding scrapers, so far, one that is almost square, but angled back slightly towards the right(like Mr raffan suggests for bottom of boxes in one book) a curved in one dierction one, a round nose, and then I was trying to find a way to make one of the kelton type ones for undercutting bowl edges. it was puzzling me as to how to draw it, but then I found a french curve that had the exact shape, in the right size too. my only change was to sharpen in two directions(it curves around, with almost a ball tip) the ball was sharped to be used on side up, so I can reach tight spaces, and the curved shaft sharpened to be used other way up for undercutting wide things.

Reply to
Reyd Dorakeen
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Reyd, Using files for scrapers may sound lie a good idea, but it has some possible dangers. Files are usually hardened to the point where they become brittle. If you have ever broken one, you may have found some slivers, very sharp, that if broken under the pressure of turning, can become flying darts.

To help prevent this, the file should be ground smooth to eliminate sources of stress fractures. Then the file should be tempered at something around

400-500 degrees F. This is no guarantee, but it give you a better chance. A better choice would be to take one of your shock rods, heat it as hot as you have the capability, then hammer it out flat to a shape you want, let it cool slowly, grind the profile you need, then reharden and temper. If you want a larger piece of high carbon steel, try to locate an old Chrysler product from the late 50's, 60's or early 70's and get one of the torsion bars from the front end, or use truck sway bars.
Reply to
Ken Moon

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