Some time ago I made up one of these ball bearing tools after seeing John making them on his video channel. Very useful, I made it quite chunky using an old transit kingpin as the main body. It fitted into one of my Algra rapido t2 size toolholders.
Anyway, I bought a toolholder very cheaply that takes a M2 taper so i thought I'd make the roller tool single ended, and mount it in the mt2 toolholder, and free up one of my regular toolholders. Nice little taper turning job.
Here's the compound slide being aligned to the shank of a taper drill held in the 3 jaw.
I mounted the shank of the old tool in the chuck and turned my best approximation of a mt2 taper on it, with a ejection pin (can't think of the right word) on the end. This was all done by trial and error, it took 3 goes, moving further up the stock each time, but I achieved a good fit, perfectly adequate for the intended purpose.
Heres the finished job.
And here it is in place.
For shafts:
For discs:
I have to manage without the height adjuster so I can mount it either way up. The height is not hyper critical so I'll see how it goes.
All in all a nice little turning job. All this was done on my Willson slant bed lathe. I would not recommend the use of the transit kingpin as raw material as it is very hard at the surface and not easy at all to machine.
Mart.
Anyway, I bought a toolholder very cheaply that takes a M2 taper so i thought I'd make the roller tool single ended, and mount it in the mt2 toolholder, and free up one of my regular toolholders. Nice little taper turning job.
Here's the compound slide being aligned to the shank of a taper drill held in the 3 jaw.
I mounted the shank of the old tool in the chuck and turned my best approximation of a mt2 taper on it, with a ejection pin (can't think of the right word) on the end. This was all done by trial and error, it took 3 goes, moving further up the stock each time, but I achieved a good fit, perfectly adequate for the intended purpose.
Heres the finished job.
And here it is in place.
For shafts:
For discs:
I have to manage without the height adjuster so I can mount it either way up. The height is not hyper critical so I'll see how it goes.
All in all a nice little turning job. All this was done on my Willson slant bed lathe. I would not recommend the use of the transit kingpin as raw material as it is very hard at the surface and not easy at all to machine.
Mart.