Granville lathe identification

[Paul ThomsonParticipant @paulthomson70142]

Help needed to identify a Granville lathe

[Paul ThomsonParticipant @paulthomson70142]

Hi everyone, as a newby to lathes, I just bought an old girl that needs some TLC and new bits (to be bought, or made) to restore it to its former glory before I can start using it.I have photos, but can’t see how to add them, so if someone can explain how I as photos maybe someone can help me identify which model it is (so I can buy the new bits needed). And finally, how do I remove the Chuck?. Thanks in advance, Paul.

[JasonBModerator @jasonb]

Welcome to the Forum Paul, have a look at this which should show you how to post photos.

J

[not done it yetParticipant @notdoneityet]

someone can help me identify which model it is

This link may help you identify the model. Chuck is likely screwed on, if not bolted.

**LINK**

[Paul ThomsonParticipant @paulthomson70142]

Thanks for the very quick replies gentlemen. Thanks to Jason, I have now uploaded the photos. I have it stopped now! It needs a lot of work.

[Graham FlavellParticipant @grahamflavell13482]

Paul

Have you looked at the lathes.co.uk site? There is quite a bit of information there on Granville lathes. You model looks as though it migh be a CSL with a few none standard parts. Granville chucks are usually screw on, the same size as Myfords with whom they share a number of similarities in the design.

Regards

Graham

[Paul ThomsonParticipant @paulthomson70142]

Many thanks Graham, spot on sir! I have looked at the pics on the site you suggested and it does indeed look like a CSL. the arms that originally held the electric motor and pulleys are missing and someone has made a botched replacement, but if you ignore that it does look identical. Thank you for taking the time to help. Do you know how I remove the shaft that the Chuck fits onto from the frame,I now have the Chuck of the backplate and I can see the backplate is indeed screwed onto the shaft I have taken the bolts out of the two split bronze bearings and taken out the grubscrews from the pulleys. Does the bit on the back of the shaft unscrew?

[Graham FlavellParticipant @grahamflavell13482]

Paul

If I understand you correctly the back of the mandrel has one or two plain collars which are screwed on but generally they are split and locked into place with an Allen headed screw. Once this is removed the gear attached to the mandrel can be seen to be locked into place with a grub screw driven down between the mandrel and the gear when this is removed the gear should pull off. I am basing this on how my Granville Major is assembled. Your model may be different so I would advise you to proceed slowly and cautiously in the dismantling of the lathe. Hope that helps.

Regards Graham

[Paul ThomsonParticipant @paulthomson70142]

Thanks Graham, I will take some pics now and post them.
Paul.

[Paul ThomsonParticipant @paulthomson70142]

Hi Graham, that’s some more pics showing the shaft I need to remove. There was only 1 grub screw that I can see and that was in the big gear at the Chuck end. I removed this and the whole centre cluster of pulleys and gears now slides back and forth on the shaft. The back end has 2 drilled holes in it but I can’t see any grub screws in these holes. I can’t see how this shaft comes out!…..

[alan-lloydParticipant @alan-lloyd]

Does the collar on the end screw up tight against the other? they appear to both have tommy bar holes in them, hold the inner one next to the gear and try to undo the outer one

[Paul ThomsonParticipant @paulthomson70142]

Hi Alan, I will try it. The holes only go down about 2 to 2.5mm and seem to be solid at the bottom.

[alan-lloydParticipant @alan-lloyd]

They probably require a special c type of spanner

[Paul ThomsonParticipant @paulthomson70142]

That makes sense, a”C”with a small pin in the top of the C. I will make a pair and try it. Thanks Alan.

[Paul ThomsonParticipant @paulthomson70142]

Well done Alan, the fish & chips are on me. It’s out, they were indeed 2 threaded collars. I am going to machine some flats into them so I can use an open ended spanner to do them back up. They weren’t even tight, seems you nip them up just enough to take the end float out of the shaft then lock with the second collar.i will post some pics when the old girl is fully reconditioned and back to her former glory. This is a solid bit of kit with virtually no wear. I was going to buy a new mini lathe until I found out they use plastic gears!….Yuk!…

[Paul ThomsonParticipant @paulthomson70142]

Thanks to everyone who took the time to contribute. I got my new (old) lathe identified, then striped without causing any damage.

[Paul ThomsonParticipant @paulthomson70142]

Granville CS lathe restored. Zero play in the Chuck and the tailstock and headstock line up within 2 thou. Just got to lap the slides and gib steps now as they are still a bit sticky in places.

[Paul ThomsonParticipant @paulthomson70142]

Will take some pics of the finished job and post. 👍

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