Best countersink drill bit for Carbon fibre??

[bretts]

I need to do 4 holes in a chassis but want a neat job.

I tried a counter sink bit I got with a big drill bit set and it was rubbish.

Recommendations please??

Ta

[bigalbi]

I have been using these with good results in both Carbon and Aluminium

http://www.ebay.co.uk/itm/6pcs-90-3-...gAAOSwlMFZEhHG

[CHEVY]

Depending on angle of countersink

American different to others

[Peakey]

Is it imperial or metric your doing? Like Chevy said if it's US it'll be imperial I got some from the US the other year that have been great can't remember the name though

[fidspeed]

try googling it quite bit of useful info out there

dave

[bretts]

Ta...yep good old wikipedia. I wil want do unc for these holes and metic in future projects.


According to wikipedia unc is 82.5 deg and metric is 89.9 deg.

Thanks guys