Quote:
Originally Posted by neil_p
Head angle I'm sure is 82 degree, if you don't have that cutting tool a 90 will do, but it won't support the head well and all the pressure will be in a small area at thinnest point. If the cf sheet is not very thick, the countersink taper will be knifed edged and it will be very easy to be a de-lamination point. Probably ,ADR this sound drastic, but if the screw is done up very tight it will damage the material with a 90 degree cut.
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I would worry about the countersink angle too much, just get as close as possible.
I made a chassis for my 1/12 car that uses imperial screws using a 90 degree countersink bit over a year ago and have never had a problem with it. I did seal all the holes and edges with super glue to prevent de-lamination.
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