Shrinking disc? |
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Shrinking disc? |
bbrock |
Jun 13 2017, 09:05 AM
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#1
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
I've seen shrinking discs mentioned or discussed on a few older threads but would like to see what people think today.
I have a small oil can spot (~ 3" wide) following a panel patch that needs to be shrunk, and I'm sure there will be more before this project is finished. I don't own an O-A torch but have MAPP and Propane. But the discs look like a much safer and less error-prone way to go. So what do you think of these things? Better than a torch for a nube? Are they all pretty much the same, or is there a particular one that stands out as better? Probably going to mount it on my ancient, bomb-proof 4" Makita with a 5/8" arbor adapter. I have an old 7" Craftsman that I rarely use because it is unwieldy and impossible to get into many places. Thanks! This community rocks! |
jpnovak |
Jun 14 2017, 06:53 AM
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#2
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They call me "Nanoman" Group: Members Posts: 231 Joined: 26-August 09 From: Austin TX Member No.: 10,736 Region Association: Southwest Region |
I have a 4.5 inch shrinking disk that works great. Its perfect for pulling dents.
If you have an "innie" dent you push it out to make an "outie" and then shrink it down. I like the smaller one since I can operate the grinder with one hand and a wet rag in the other. You can see the high spots "blue" when heated and then shrink them down. My method is to hammer and dolly to shape and then use the shrinking disc to effectively plannish the surface finish. They do not work great on inside concave curves. Just from the standpoint of access. |
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