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Adding a leadscrew to a lathe ?

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Rich250209/05/2022 14:15:41
76 forum posts
2 photos

Any one retro fitted a leadscrew to a small lathe? ( 15-20" between centres )

There are now motor controlled set ups withh off the shelf ballscrews that require no gear train so that would cut out a lot of the work.

Is this a practical project or a rabbit hole ?

Clive Foster09/05/2022 14:20:18
3137 forum posts
109 photos

In principle pretty practical but, as you will only do it once, bound to be 5 times the work and general futzing about than you expected.

Lots of careful measuring beforehand will be essential. This is the sort of job that really makes you wish for decent 3D CAD skills.

Clive

John P09/05/2022 14:51:02
407 forum posts
259 photos

Posted by Rich2502 09/05/2022 14:15:41


Any one retro fitted a leadscrew to a small lathe? ( 15-20" between centres )

There are now motor controlled set ups withh off the shelf ballscrews that require
no gear train so that would cut out a lot of the work.

Is this a practical project or a rabbit hole ?

------------------------------------------------------------


Warco cnc conversion Mew 207 through to 212,
a bit bigger than your machine but the principle much the same.
John

Martin Connelly09/05/2022 14:59:55
avatar
2137 forum posts
222 photos

Are you starting off with a lathe with no leadscrew? Often people with electronic leadscrews just add a stepper drive to an existing leadscrew. This allows the half nuts to be engaged and disengaged as required. Adding a ballscrew and nut would require a different way of working as there are no half nuts that work with ballscrews. You may have to come up with a way to disengage the carriage drive and move the ball nut away from the carriage if you wanted to do something that required moving the carriage manually. Back driving the ballscrew may not work.

A permanently fitted ballscrew drive is halfway to having a CNC lathe, is this your aim?

Martin C

JasonB09/05/2022 15:58:06
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Moderator
22764 forum posts
2656 photos
1 articles

If it is a small watchmakers type lathe with a clamp on saddle and no existing leadscrew then the saddle will probably not be designed to slide up and down the bed like on a larger lathe so you may get problems with twist and racking of the carriage.

Frances IoM09/05/2022 16:20:14
1268 forum posts
28 photos
The Taig/Peatol small lathe has no leadscrew - there is, or was, a commercial addon package tho my lathe came with a jury rigged leadscrew using a threaded rod and a nut formed by bit of thin plate, the original rack + gear having been removed - I re-installed the rack as it felt more comfortable but if it were my only lathe think I would look towards a leadscrew of some form.
bernard towers09/05/2022 17:06:34
619 forum posts
109 photos

Look at deansphotgrafia site this shows Taig leadscrew fitting.

Peter Cook 609/05/2022 19:19:58
282 forum posts
80 photos

There is an example of a leadscrew setup I fitted to a Taig here.

Taig Lathe V3 | Model Engineer (model-engineer.co.uk)

Steviegtr09/05/2022 19:25:57
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2436 forum posts
336 photos

Have a look at Ades workshop on Youtube . He is doing one now. Along with a lot of other upgrades.

Steve.

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