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Old 02-05-2012, 05:49 PM
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with the pilot hole and rod you can turn the saw in reverse to cut the paint first.
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Old 02-05-2012, 07:07 PM
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cutting a hole through paint

I don't know about u guys but why wouldn't u use a electricians knock out punch.. Drill a pilot hole first then place punch there and screw together.. Good Luck Jim
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Old 02-05-2012, 07:17 PM
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I have never kept pilot blanks. For years I've just predrilled the hole with the holesaw bit, then install the bit reversed in the holesaw so the tip is inside, and the smooth shank is out. Then just drill the hole.
I do mask off close to the hole with paper to keep hot shavings off the paint, but not close enough to drill through the tape. A spray bottle with water works well to cool the blade if needed.
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Old 02-07-2012, 07:18 AM
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Quote:
Originally Posted by 327 / 350 hp
I don't know about u guys but why wouldn't u use a electricians knock out punch.. Drill a pilot hole first then place punch there and screw together.. Good Luck Jim
327, I do instrumentation and electrical work for a living and even when using a knockout on an elec. panel, it tends to pull the paint from around the edge of the hole. And the enclosure paint is alot thinner than it would be on your ride. Not only that, it can "pull" the metal out around the edges and create an uneven surface that you would have to rework. Probably not a good option if you want to keep from damaging the paint and working surface.......just my two cents.
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Old 02-07-2012, 07:47 AM
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if there is any filler in the area a knock-out punch will crack it and most likely break the bond. not a good thing.
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