13-03-2022, 09:51 AM
Hi Jon
I use standard HS drills (Bosch as it happens). I have a metric set in 0.5mm increments and an Imperial set (not Bosch). Almost all the time the metric in 0.5 increments are OK and if you need more accuracy then I go to the nearest size then use a reamer (by hand).
Hope I’m not teaching Granny etc…. But sharp drills are vital! If you don’t have one, buy a bench grinder and learn how to set the right angle. Also punch the hole first and use progressively bigger drills starting small. A drill press is invaluable and I set mine to a low speed which seems to work best.
Hope this helps
Cheers
Howard
I use standard HS drills (Bosch as it happens). I have a metric set in 0.5mm increments and an Imperial set (not Bosch). Almost all the time the metric in 0.5 increments are OK and if you need more accuracy then I go to the nearest size then use a reamer (by hand).
Hope I’m not teaching Granny etc…. But sharp drills are vital! If you don’t have one, buy a bench grinder and learn how to set the right angle. Also punch the hole first and use progressively bigger drills starting small. A drill press is invaluable and I set mine to a low speed which seems to work best.
Hope this helps
Cheers
Howard