jamesp
Cave Dweller
Member since October 2012
Posts: 36,159
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Post by jamesp on Sept 17, 2017 5:12:20 GMT -5
I made parts for a couple friends some years ago, they used a tube ~3" dia. about 10" long, mounted over a belt sander. In the steel tube was a piece of PVC pipe with a cap on the business end. Chunk of rubber glued or riveted to pipe cap. Worked fairly well. Can you explain Larry ?
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quartz
Cave Dweller
breakin' rocks in the hot sun
Member since February 2010
Posts: 3,341
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Post by quartz on Sept 17, 2017 23:50:26 GMT -5
Nope, no one can explain Larry, and the world is thankful. What they built was a piece of pipe 3, maybe 4" in diameter and ~10" long mounted vertically over a 4" belt sander. The PVC pipe with a flat cap and rubber on the end was to keep the rock from hopping back out of the pipe and keep it in fairly close contact with the sanding belt. Water was piddled onto the belt just ahead of the pipe. I don't know how the depth of the plastic pipe was held in regard to the rock, that came after the initial trial run was done, but an easy thing to do. My involvement was in making the pipe stand up over the belt, and an adapter for the drive motor. Never saw it run due to its location of use, but did see some of the results. They used it for roughing off corners after sawing blanks for a sphere machine, and it worked pretty well in their opinion.
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