Hollowing Scraper (from rec.crafts.woodturning) - scraper.jpg (0/1)
This is the profile I ground from M2 bar stock for shear scraping the
inside of hollow forms freehand- the cutouts are there because the M2 is used punch tooling, and the piece I used started life as a square punch- if I was starting from round stock like drill rod, there would be no reason for it to be there. Works really well, and leaves a surface that does not require sanding. The tool is used by mounting the tool steel into the end of a 3-4' pipe, and holding it near the center and at the end while bracing it against the midsection and scraping the inside with a smooth motion by moving at the waist and keeping your arms steady. No toolrest (I tried it with the toolrest at first, and it didn't work nearly as well- this is a freehand tool, to be sure.) I had thought that the side angle was relieved, but upon inspection, it turns out I ground it kicked out rather than angled in. It wasn't what I had intended to do, but it works well, so I'm not about to complain- it could be that that is the reason it works well freehand. |
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