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Thread: Looking for ideas
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19th August 2012, 12:03 AM #1.
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Looking for ideas
A couple of years back I found two large (370 x 120 x 25 mm) permanent magnets in one of our work cleanup skips. The magnets came from a large Titanium sublimation pump and are sheathed in 0.8 mm SS but they still stick together like crazy - in fact they are capable of serious damage if not kept separated. Currently one sits under my DP and acts as a sort of black hole for metal swarf. Every now and then I pick it up and wipe of all the swarf into a plastic bucket. The other sits under a workbench gathering metal dust.
I was thinking one would make an excellent magnetic fence for a woodworking bandsaw. They stick pretty well to the cast iron table of my bandsaw but not quite enough to inspire confidence that they would not move under pressure from a large piece of wood passing thru the saw. I'm pretty sure that if I removed the SS sheathing from a long edge it would really stick to the table and then I would use some cams on the ends to act as lifters so it could be moved.
What I would like to do is find some way of encasing the magnet into a suitable fence. The commercial varieties of these fences use an ally extrusion that covers the full length of the table and also has some embedded T-tracks for hold downs etc. I am not fussed about having T-tracks.
One possibility is to just use MDF to encase the back, top and ends, and use some 1/4" ally plate for the front.
Anyone have any other ideas?
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19th August 2012, 12:24 AM #2
Short on ideas Bob, but i can say one thing, don't get a body part caught between the magnet and something magnetic......
Would simply using a piece of CI as the fence be better? If the ally is not anodized it will leave grey on the timber-not that thats a big problem at the bandsawing stage.1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.
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19th August 2012, 12:41 AM #3.
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Oh I know all about that. About 30 years ago I came too close to a 1/4 ton magnet while holding a 1/2" socket wrench and it pulled my hand onto one the side of one of the poles. I though the magnet was off but someone had turned it back on and left it on a low setting. A couple of bruises and skin nicks was the sum total of injuries. After that I always checked it was off.
Would simply using a piece of CI as the fence be better? If the ally is not anodized it will leave grey on the timber-not that thats a big problem at the bandsawing stage.
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