ballen
Diamond
- Joined
- Sep 25, 2011
- Location
- Garbsen, Germany
In my collection of stuff is this (probably home-made) boring bar. It's about 50mm (2") in diameter and about 200mm long, and I'd like to use it for making some clean 60mm holes in cast iron. It has an SK40 taper so is much stiffer than anything I can mount in a Wohlhaupter boring head.
My question is, what tooling can/should I use in this? Is there a suitable standard insert holder I can buy at reasonable price? And why are there two sets of holes? (Note: in spite of the apparent joint line or split line, it seems to be one piece, not screw-apart.)
The holes are 10mm diameter on the smooth part, and the one that is threaded on the end is M12. I don't do this sort of boring on a regular basis so am OK with having something that I adjust by tapping or by trial and error.
My question is, what tooling can/should I use in this? Is there a suitable standard insert holder I can buy at reasonable price? And why are there two sets of holes? (Note: in spite of the apparent joint line or split line, it seems to be one piece, not screw-apart.)
The holes are 10mm diameter on the smooth part, and the one that is threaded on the end is M12. I don't do this sort of boring on a regular basis so am OK with having something that I adjust by tapping or by trial and error.