Steve Lovelock
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| posted on 9/3/08 at 01:47 PM |
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How can I counter sink fibreglass accurately?
I am thinking of fixing the dash panel I have made to the scuttle using counter sunk head screws. This would mean that I need to counter sink the
fibreglass scuttle panel accurately about twenty times. Never having counter sunk fibreglass before I was just wondering if I was asking too much?
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nitram38
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| posted on 9/3/08 at 02:11 PM |
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You will weaken it.
If anything you should use domeheads with load spreading washers
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twybrow
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| posted on 9/3/08 at 02:12 PM |
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I think you would find it would chip. I am going to use dome heads instead. Have you got an offcut or non visible bit you can try it out on?
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jacko
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| posted on 9/3/08 at 02:18 PM |
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HI At work i use a wood counter sunk bit the type with lots of cutting blades
Jacko
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britishtrident
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| posted on 9/3/08 at 04:17 PM |
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Really not a good idea you will just end up with crack running from the holes, in fact any screwed/bolted fixing used on GRP should use large penny
washers.
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worX
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| posted on 9/3/08 at 05:07 PM |
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As above...
AND - you won't/don't need about 20 screws to hold it in place. (I used 8 and it's more than enough) 7 would be a fine number...
Steve
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02GF74
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| posted on 10/3/08 at 02:33 PM |
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I used 13 4 mm hex button heads. 
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Steve Lovelock
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| posted on 10/3/08 at 05:14 PM |
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Decided on M5 dome headed screws in the end. Have already drilled the holes so I had no option there.
Thanks for the help
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