Harrison lathe restoration

[squalane]

Hi folks, fairly new to wood turning and I'm getting stuck at the first hurdle.. I noticed a slight wobble in the (new) chuck on my harrison jubilee lathe, and upon opening up the headstock cover I noticed the spindle seems to be at an angle, which I'm assuming doesn't help with said wobble.. No idea how it got that way but wondering if anyone has any advice for how to fix it? Any advice is much appreciated. I've attached photos as links as I couldn't compress them sufficiently to stick on here, hope they work..
Thanks!
https://ibb.co/tcRMTPChttps://ibb.co/wsX3Pznhttps://ibb.co/mvwFcdFhttps://ibb.co/MMFJCVHhttps://ibb.co/Zx5vPbFhttps://ibb.co/L9dWfny

 

[parvum]

Hello I have two of these lathes and from your pictures it seems that the four speed pulley is loose on the spindle and tipped out of square with spindle. The mating surface on he pulley is rather narrow and the soft aluminium is prone to being displaced if any play developes which rapidly worsens under the hammering dealt by the loose fit. If the spindle was bent it would rapidly destroy the bearings and you would hear a lot of noise under load. I have rebushed several of these pulleys to take up out off round and excess clearance.If you do not have the facilities to bore the pulley true and the make a bush to fit any small engineering firm should be able to do this for you. In any event to either repair the pulley or examine and replace bearings will require removing the spindle which can then be checked for truth, ideally with v blocks and a dti but rolling it on a flat surface will give you a good indication if there is any distortion. But before stripping the spindle check th front bearing for any up and down play and the pulley for a firm fit on the spindle
hope this helps
regards Paul

 

[squalane]

Hello I have two of these lathes and from your pictures it seems that the four speed pulley is loose on the spindle and tipped out of square with spindle. The mating surface on he pulley is rather narrow and the soft aluminium is prone to being displaced if any play developes which rapidly worsens under the hammering dealt by the loose fit. If the spindle was bent it would rapidly destroy the bearings and you would hear a lot of noise under load. I have rebushed several of these pulleys to take up out off round and excess clearance.If you do not have the facilities to bore the pulley true and the make a bush to fit any small engineering firm should be able to do this for you. In any event to either repair the pulley or examine and replace bearings will require removing the spindle which can then be checked for truth, ideally with v blocks and a dti but rolling it on a flat surface will give you a good indication if there is any distortion. But before stripping the spindle check th front bearing for any up and down play and the pulley for a firm fit on the spindle
hope this helps
regards Paul

Hi Paul, thanks so much for getting back to me, I think you are right about the pulley being tipped out of square - I'm not hearing noise to indicate the bearings are being damaged.. Funny thing is I've been trying to get the pulley loose from the spindle but with no success, there is a grub screw on it which I've removed but it still seems totally welded on. Either I'm being silly and missing something or it has seized up onto the spindle somehow..

 

[Phil Pascoe]

Check there isn't another grub screw under the first one.

 

[squalane]

Check there isn't another grub screw under the first one.

HI Phil, yeah wasn't sure whether than might be the case but I can't see/feel another in there, unless the head has been completely worn out..

 

[parvum]

Hello again, another joyful feature of this design is an aluminium pulley on a steel spindle, this combination is prone to galling which makes separating the two difficult. WD40 is the preferred lubricant or paraffin, but try and true up the pulley to the spindle, as pulling in whilst cocked will cause further galling as the effective diameter of the pulley bore is reduced although not in ahelpful way!

 

[squalane]

Hello again, another joyful feature of this design is an aluminium pulley on a steel spindle, this combination is prone to galling which makes separating the two difficult. WD40 is the preferred lubricant or paraffin, but try and true up the pulley to the spindle, as pulling in whilst cocked will cause further galling as the effective diameter of the pulley bore is reduced although not in ahelpful way!

Ah ok I think that must be what it is! That's really helpful to know, thanks! I'll give it some WD40 tomorrow and see if I can get it to move...

 

[Fergie 307]

Know nothing about their woodworking lathes, but a lot about the metalworking ones. I would agree with Paul, they do have a thing about fitting one grub screw on top of another. Also very keen on taper pins, although logically you would expect one or the other, not both. Heat maybe your friend here as the alloy will expand very differently to the steel shaft. Getting it hot with a hot air gun then a good dose of Plus Gas may help. Another idea would be to make a suitable spacer to fit around the front of the spindle, then use a washer and nut, or the chuck on the spindle to draw it out.

 

[Fergie 307]

And if you need to rebore and sleeve it, then make your sleeve in steel so you don't have the problem again.