Pre war Colchester Master

[hthParticipant @hth]

Hi Again

 

Maybe this variant does not have a thrust bearing at all ? Mystery .

 

I will have a closer  look at the Salisbury sold example while at the library computer tomorrow .

 

The bronze bearings have a unusual method for adjustment . Firstly the two screws either side of the oiler have tapered ends , the screw tapers fit into tapered holes in the bronze bearings , the bearings are one piece but have a slot along the top with the two tapered holes in the slot , as the screws force into the bearings the slot opens slightly . Secondly, there is a split in the headstock casting itself and a bolt that allows a  squeezing force to be applied to the bearing shell  .

 

Edited By hth on 15/09/2015 09:44:58

Edited By hth on 15/09/2015 09:46:25

Edited By hth on 15/09/2015 09:48:10

[Ady1Participant @ady1]

It sounds like a variation on the Drummond M system

So the main bearings are adjusted thus:

The adjusters are loosened

The Bolt on the casting is tightened until the spindle first shows slight signs of resistance

The adjusters are screwed down, pushing the bearing minutely away from the spindle and into the wall of the headstock casting

[hthParticipant @hth]

Posted by Ady1 on 15/09/2015 10:06:21:

It sounds like a variation on the Drummond M system

So the main bearings are adjusted thus:

The adjusters are loosened

The Bolt on the casting is tightened until the spindle first shows slight signs of resistance

The adjusters are screwed down, pushing the bearing minutely away from the spindle and into the wall of the headstock casting

Hi Yes that's about right . Thanks for the link Mike

[hthParticipant @hth]

I used a torch and had a peak , I can see that there is something squeezed in there between the gear and the headstock casting at the red A indicated . It appears that the thrust bearing is in there . Mike

[hthParticipant @hth]

 

 

The old Colchester has a quaint method for the reversing of the lead screw , the gears are marked" for RH threads" . My other lathe is a 1940 Hendey  Metric version with a Paris dealers plate on it, this lathe ended up here because Mr Hitler invaded France .

 

 

Edited By hth on 18/09/2015 03:15:04

Edited By hth on 18/09/2015 03:15:29

Edited By hth on 18/09/2015 03:16:44

Edited By hth on 18/09/2015 03:19:14

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