rodw
Well-Known Member
- Joined
- Dec 2, 2012
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Hi guys, I am fitting a BXA toolpost to my new lathe and tomorrow's job is to drill and ream a 12mm hole about 40mm deep in the centre of the 16mm bolt I bought today. I've already drilled an 8.5mm hole right through the piece (as an 10 thread is required as well) and have a set of unused chucking reamers to do the job with.
I just wanted to check the hole size to use. From what I have read, it seems that an 11.5mm hole is the right size to go for. That is 0.5mm or 0.002" undersize.
It just sounds too easy to use a standard sized drill. Should I be using a fractional drill? I do have a set of imperial Letter and Number drills that I can use for fractional sizes if required.
Anyway, I just wanted to check this before diving in and breaking something.
I just wanted to check the hole size to use. From what I have read, it seems that an 11.5mm hole is the right size to go for. That is 0.5mm or 0.002" undersize.
It just sounds too easy to use a standard sized drill. Should I be using a fractional drill? I do have a set of imperial Letter and Number drills that I can use for fractional sizes if required.
Anyway, I just wanted to check this before diving in and breaking something.