Manual lathe with ballscrew feeds?

[WGJ]

Does anyone know of a manufacturer of lathes that uses ballscrews rather than acme screws for the travels? And is not cnc?

[RICHARD ZASTROW]

Probably need a lead screw for threading.

Dick Z

[Bubba]

You would also have the "back drive" problem. It would be the devil trying to hold a position.

[Andre' B]

A CNC tool room lathe is about as close as you are likly to get.
Here be the Haas version.
[nomedia="http://www.youtube.com/watch?v=0RtBhY8wXqk"]YouTube - Tool Room Lathe[/nomedia]

[WGJ]

And there in lies the logic to the acme screw. I hadn't even thought about the push-back.

Thanks guys.

[WGJ]

A CNC tool room lathe is about as close as you are likly to get.

I know the Haas. I have the toolroom mill. My thought was the lack of backlash. A hydraulic chuck and ballscrew drives would mean that you wouldn't end up with screws and scrolls worn out so quickly at a single position. I am tired of runout on one inch shafts, and anything over two inch is perfect.

Just a thought.

[MSFAB]

I have a ikegai manual lathe early 70's uses a fixed ball screw then has another shaft coming from the gearbox to spin the ballnut. Little backwards but cool.