Finally completed my ball turning attachment to make use of my under utilised boring head. This was the culmination of a two month process which required me to make:
1. Gear cutters to make the …
2. Missing changewheels for the lathe to …
3. Screwcut the M14 thread on the shaft to screw into the boring head and…
3. To finish the shaft to fit the bearings in the toolpost block which was …
4. My first attempt at cutting a dovetail on the mill …
5. And the first ball is the one on the handle

I learned a lot doing it and very pleased with the result.

Hywel

Edited By Hevanscc on 29/11/2017 21:57:22

Edited By Hevanscc on 29/11/2017 21:58:15

Thanks Dave. The main incentive being the quote I got to buy the missing changewheels, necessity being the mother of invention etc . . .

I thought about that, but after a bit of mental three dimensional gymnastics I decided that the geometry of the cutting edge of the boring bar, as presented to the revolving work, is the same as a regular knife tool used in the normal way. In other words I used it as it is and it worked OK . . .

Hywel