- Joined
- Mar 14, 2013
- Messages
- 443
A couple of noob boring head questions in the "correct me if I'm wrong" format:
Take a typical boring head that says "max 5/8" offset, I assume that's the center hole so that means that usinga boring bar that goes down to 9/16 gives a max diameter of .625x2+9/16 or 1.8125? Then the outer hole is, say, another 5/8 off so that'd be an additional 1.25 for a max 3.0625 hole diameter? At which point you can use the cross hole and go still wider?
If you use the cross hole do you use the same boring bar or do you need a different one with different rake for end cutting?
I've also been told that one can use a boring head for OD turning (I don't have a lathe) by turning the boring bar around. To do this you either need to reverse the mill's direction of rotation (not immediately possible on mine, though I haven't looked at the wiring) or a reverse cutting boring bar. I've never seen such a "backwards" boring bar advertised; are they actually available?
What about using a boring head for facing/flycutting or trepanning? OK or inadvisable?
Take a typical boring head that says "max 5/8" offset, I assume that's the center hole so that means that usinga boring bar that goes down to 9/16 gives a max diameter of .625x2+9/16 or 1.8125? Then the outer hole is, say, another 5/8 off so that'd be an additional 1.25 for a max 3.0625 hole diameter? At which point you can use the cross hole and go still wider?
If you use the cross hole do you use the same boring bar or do you need a different one with different rake for end cutting?
I've also been told that one can use a boring head for OD turning (I don't have a lathe) by turning the boring bar around. To do this you either need to reverse the mill's direction of rotation (not immediately possible on mine, though I haven't looked at the wiring) or a reverse cutting boring bar. I've never seen such a "backwards" boring bar advertised; are they actually available?
What about using a boring head for facing/flycutting or trepanning? OK or inadvisable?