Tips for Drilling Holes in Fiberglass - Page 2 - Fiberglass RV


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Old 04-03-2012, 10:57 AM   #15
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Or you could do like a dentist and grind the hole out. Start with a 1/8" twist drill, then switch to a dremel tool with a small stone or diamond burr to enlarge the hole. On your clock the capture nut would probably cover small chips anyway. Be sure and post pics of your finished work.
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Old 04-03-2012, 12:39 PM   #16
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OK
Now that you have said it is a small hole I would just go for it no matter how you do it.
A Brad Ponit bit will give a clean hole and just don't let the bit pull through when it breaks thru the backside and it should be OK.

Again though going backwards with the Brad Point will ensure it will not tear out.
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Old 04-03-2012, 02:45 PM   #17
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Originally Posted by Lil M. View Post
Hmmm...that would make TWO holes...one in the cabinet and one in the outside wall.
uh...drainage?
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Old 04-03-2012, 09:09 PM   #18
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Mission accomplished. I marked the location, protected it with painter's tape, drilled a pilot hole with an 1/8" regular bit, going in reverse and then forward, drilled 1/4" hole with the brad point bit, again going in reverse and then forward. Kept speeds low and things seemed to work out fine.
Then I tried to insert the shaft of the movement through the hole. Too tight, so I ended up reaming out the hole to about 5/16" just going at slower speed. The shaft finally went through. I secured the movement with the hex nut, aligned and mounted the hands, installed the battery, and the little clock started its circular journey.
I ordered some self-adhesive dots to mark the numbers, but they only came in gold, so I've spray-painted them black and they're drying as I type. Will install tomorrow.
Thanks everybody for all your help. I decided to celebrate with a glass or two of white wine...much more civilized than whiskey.
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hands.jpg  
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Old 04-03-2012, 09:20 PM   #19
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I love it when a plan comes together Can't wait to see the finished product
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Old 04-03-2012, 09:21 PM   #20
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Old 04-03-2012, 09:22 PM   #21
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That was a really cool idea.
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Old 04-03-2012, 09:34 PM   #22
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Thanks all. Actually, I borrowed the idea from Robert Johans and his Scamp reno.
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Old 04-03-2012, 10:39 PM   #23
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Old 04-04-2012, 01:00 AM   #24
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Luv it! well done!
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Old 04-04-2012, 05:19 AM   #25
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Good job.
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Old 04-05-2012, 08:01 AM   #26
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Quote:
Originally Posted by Jon Vermilye View Post
Another way to make a clean hole is to use a tapered reamer. Drill a hole large enough for the tip of the reamer, then use the reamer to enlarge the hole to the finished diameter. Avoids any tear out.

I agree that this is a great way to drill fiberglass with an almost 100% certainty of a clean hole!
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Old 04-05-2012, 08:09 AM   #27
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It looks like the second hand was too long but you fixed that!

Nice work.
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Old 04-05-2012, 01:55 PM   #28
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It looks like the second hand was too long but you fixed that!

Nice work.
Good one! It's my attempt at being edgy/artsy.

Applied the little self adhesive black plastic dots (they're <1/8" thick). I'm taking bets as to how long they stay stuck once I take the Scamp on the road.
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