It consists of:
- A CXA (fits the MITERSlathe) boring bar holder with a 3/4" split bushing
- The cheapest 2" boring head I could find
- A 3/4" shank for the boring head
Total damage was ~$100.
I turned a couple 3/4" I.D. thrust bushings:
A handle:
The little radial-keyway allows the handle to be rotated 180 degrees and still have positive interference with the back of the boring head shank (which I filed a matching keyway into).
Threw together a quick carbide insert holder. Someone else was on the mill, so all the shaping was done with a file, belt sander, and bench grinder:
Almost done. The two set screws are used to tighten the play out of the split bushing:
To test it out, I turned a ball for the end of the handle. Success!
The ball was tapped, threaded onto the end of the handle, and locked with some red loctite:
Not bad for an afternoon.
how did you hold the ball to drill and tap it?? Cool build!
ReplyDeleteI drilled the whole by flipping the whole piece around in the lathe before parting off the ball, and drilling through all the extra stock. To tap it, I held it in a vice with a v block, with some rubber sheet between the ball and the vice/block.
DeleteNice.
ReplyDelete