HELP -- I need to drill a 1 1/8" hole in fiberglass - Page 3 - Fiberglass RV


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Old 12-05-2012, 01:59 PM   #29
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Ron's idea for a circumferential fence or enclosure of wood around the hole saw is a variation of a router template. Elaborate but better than a nasty gash in the gelcoat when the holesaw skates.

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Old 12-05-2012, 02:05 PM   #30
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Beware of the central chip knife in a Forstner. It's meant to work in wood. It can wedge in glass and pull that tiny center spur to the side tearing out the pilot hole. Similar problem with multispurs.

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Old 12-05-2012, 03:37 PM   #31
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Quote:
Originally Posted by rabbit View Post
Beware of the central chip knife in a Forstner. It's meant to work in wood. It can wedge in glass and pull that tiny center spur to the side tearing out the pilot hole. Similar problem with multispurs.

jack
I agree. A Forstner bit can bite in an do some nasty damage.
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