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Unimat sl with high tailstock

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Leslie Deasy31/05/2021 17:32:14
7 forum posts

New unimat sl owner

Just wondering if any one else with a unimat has come across there tailstock been 0.5 higher than the spindle center??

old mart31/05/2021 17:36:26
3398 forum posts
210 photos

That is a lot, 0.05mm high would be pushing it.

Andy Carlson31/05/2021 18:16:50
401 forum posts
130 photos

Mine is OK... never measured it but have not noticed an issue anyway.

Do you get the same height difference with the tailstock barrel fully retracted as with it fully extended? - just wondering if the tailstock is sitting level or not.

Are we talking the ols Unimat DB/SL here or the more modern (red) thing similar to the 'Unimat PC'

old mart01/06/2021 16:50:15
3398 forum posts
210 photos

Looking at the "Lathes UK " website, you should look into ways of raising the spindle height of your lathe to match the tailstock. I think that is the easier option. 0.5mm shim is available and might be used to raise the left hand end of the lathe. Lowering the tailstock would be possible, but harder to do. There are lots of Unimat people on this forum to tell you if this is feasible.

br01/06/2021 17:39:43
697 forum posts
3 photos
Posted by old mart on 01/06/2021 16:50:15:

Looking at the "Lathes UK " website, you should look into ways of raising the spindle height of your lathe to match the tailstock. I think that is the easier option. 0.5mm shim is available and might be used to raise the left hand end of the lathe. Lowering the tailstock would be possible, but harder to do. There are lots of Unimat people on this forum to tell you if this is feasible.

We had a couple of these before upgrading to U3 version.

We never had this problem and suspect it may be a tailstock from another machine perhaps ?

The shim suggestion by old mart is the option I would go for .

bill

Leslie Deasy03/06/2021 01:00:53
7 forum posts
Posted by Andy Carlson on 31/05/2021 18:16:50:

Mine is OK... never measured it but have not noticed an issue anyway.

Do you get the same height difference with the tailstock barrel fully retracted as with it fully extended? - just wondering if the tailstock is sitting level or not.

Are we talking the ols Unimat DB/SL here or the more modern (red) thing similar to the 'Unimat PC'

Hi its the Hammered green model. No droop noticeable on the barrel

br03/06/2021 08:08:31
697 forum posts
3 photos
Posted by Andy Carlson on 31/05/2021 18:16:50:

Mine is OK... never measured it but have not noticed an issue anyway.

Do you get the same height difference with the tailstock barrel fully retracted as with it fully extended? - just wondering if the tailstock is sitting level or not.

Are we talking the ols Unimat DB/SL here or the more modern (red) thing similar to the 'Unimat PC'

The more modern (red) thing similar to the Unimat PC is the UNIMAT 4.

bill

John Olsen03/06/2021 08:50:10
1215 forum posts
92 photos
1 articles

Just to add to the confusion, there is also the Unimat 3 with the more conventional style bed, a V section at the front and a flat at the back. The DB/SL is the earlier type with a pair of round bars for the bed. If I recall correctly, that one could have the headstock easily swivelled to allow taper turning, and also the headstock could be taken right off to go on a milling attachment. So this would imply that a shim could easily be added to that end. It does sound like the tailstock and headstock may come from different batches or something like that.

John

Andy Carlson03/06/2021 08:59:29
401 forum posts
130 photos

The more modern one I was referring to is the 'Basic SL' about which there was a thread on here some time ago. Also a round bar bed but thicker bars than the old SL. Having found it again it's actually less red than I recall - just the tailstock. Apparently lathes.co.uk refer to it (or a very close cousin) as the 'Unimat PC Basic'. It was news to me at the time.

Hopefully the OP's question has been answered. My guess would be that the headstock and tailstock started out on different lathes.

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