H-M Supporter - Gold Member
H-M Supporter - Gold Member ($25)
- Dec 27, 2017
About what size would it become necessary or at least advisable to predrill with a smaller bit? I have a little project that needs a 5/16" hole shot through about .750" aluminum plate. I would like to just pop one of my HSS screw machine bits in the collet and do the entire hole with it and forgo the predrill.