nDreaZ Posted June 10, 2013 Report Share Posted June 10, 2013 How do you guys manage to drill perfect symmetric pipe holes? Quote Link to comment Share on other sites More sharing options...
gmrhodes13[Staff] Posted June 10, 2013 Report Share Posted June 10, 2013 (edited) I use a tapered stepped drill bit, it's not as fierce as a normal drill bit, just make a small guide hole first, gently does it the more you rush the more you will stuff a hole up. Good luck Edited June 10, 2013 by gmrhodes13 Quote Link to comment Share on other sites More sharing options...
Darth Aloha[Admin] Posted June 10, 2013 Report Share Posted June 10, 2013 It takes more time to set up and layout than it does to drill the holes that's for sure. There are some templates around somewhere you can use to line them up along the barrel. Basically once you locate all your hole locations zap a small pilot hole in each. Then use a unibit (tapered/stepped drill bit) to drill each one slowly. No need to have the drill spinning at top speed. -Eric Quote Link to comment Share on other sites More sharing options...
Felice Posted June 14, 2013 Report Share Posted June 14, 2013 (edited) I'll try to use a forstner drill bit. just an example ---------- Edited August 15, 2022 by gmrhodes13 link removed no longer working Quote Link to comment Share on other sites More sharing options...
gazmosis[501st] Posted June 27, 2013 Report Share Posted June 27, 2013 NNNNOOOOOOOOOOO!!!!!! A forstner bit will tear it apart. Those are not designed to be used on curved surfaces. Mark your drill hole locations. Drill your first round of holes with a 1/8 + or- bit as a guide hole. This will help you zero in exactly on your mark. The bigger bit will find its own way into this smaller hole and pretty much guide itself. But please use standard conic tipped bits. (not brad point bits either) Quote Link to comment Share on other sites More sharing options...
Darth Aloha[Admin] Posted June 27, 2013 Report Share Posted June 27, 2013 (edited) A unibit is your friend (otherwise known as a stepped drill bit) ---------- Pilot holes... pilot holes... pilot holes. -Eric Edited August 15, 2022 by gmrhodes13 link removed no longer working Quote Link to comment Share on other sites More sharing options...
A Master Builder Posted August 14, 2013 Report Share Posted August 14, 2013 SO what drill bit do I use? Quote Link to comment Share on other sites More sharing options...
Logon Posted August 14, 2013 Report Share Posted August 14, 2013 Either a stepper drill or different size metal bits The holes on a 38.1mm pipe is 10.4mm for the cooling holes. And to be honest don't think about using a hand drill buy a vertical table drill. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.