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Home > Help Needed / General Tech Chat > Drilling Through Fiberglass

wil_h

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9258 Posts
Member #: 123
Post Whore

Betwix Harrogate and York

27th Mar, 2006 at 11:36:05am

Some tips please, I always seem to damage the gelcoat.

Should I use fast or slow speed drill, should I use tape over the hole, which side should I drill from (I'd assume from the gelcoat side), any drilbits that are better for the job (wood drills for example)

Cheers

Wil

Fastest 998 mini in the world? 13.05 1/4 mile 106mph



On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


AlexB
Site Admin

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6295 Posts
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The boring bloke who runs this place.

Berkshire

27th Mar, 2006 at 11:44:29am

I'd tape over the hole, and drill slowly with a sharp drill..


Andymini

208 Posts
Member #: 438
Senior Member

London

27th Mar, 2006 at 12:02:52pm

Use a very sharp metal drill bit. If you can, grind the drill with a shallower angle at the tip.

Also start with a smaller hole and work your way up. Polyester resin is really rather brittle, hence the chipping.

Use a slow(ish) speed.

If you do still get chipping, you can easily repair with a little bit of polyester body filler.

Andy

Joe C

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Carlos Fandango

Burnham-on-Crouch, Essex

27th Mar, 2006 at 12:08:44pm

Wood bits are definatly better for smaller holes, I reckon those flat wood bits should work for larger holes and holesaws for really big holes. go through from the gel coat side and use a light pressure and generally go easy, i reckon a slowish speed should help too, around 750 rpm?

Another thing that may be worth a try is cone or step cutters, I use them for dilling all my sheet now.

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/


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