Build a watchmakers lathe

[Michael Edwards 1Participant @michaeledwards1]

10. Now back to that headstock hole. Well that supposed to contain a pin to stop the bearing from turning.

So time to strip it down and take a look. Yep there is a pin supposed to be in there.

The hole in the bearing contains a felt wick that locates in a well at the bottom of the bearing housing. I have removed this for replacement.

Edited By Michael Edwards 1 on 29/12/2019 19:45:23

Edited By Michael Edwards 1 on 29/12/2019 19:46:23

[Michael Edwards 1Participant @michaeledwards1]

11. Now time for a new pin. I found an imperial drill bit a tight fit in the hole and used Loctite to keep in place. This will be cut off to size and filed down flush.

[Michael Edwards 1Participant @michaeledwards1]

Well this is it so far.

I have ordered a few bits. 1. Oil cups so I can replace the nipples that were on there as someone had put grease in them and there should be oil.

2. A belt. I need to get a motor to power it.

3. I've also ordered some 10mm blank arbours from RDGTools so I can make a face plate and also have a good model to make some collets. As I am not a production unit I think semi hardened metal will be ok for the collets.. I have a Boxford lathe so cylindrical grinding wont be a problem. After seeing my uncle cylindrical grind on a Coronet Wood Lathe to excellent tolerances for local machine shops when he retired I think anything is capable by an Engineer. He was a tool maker in the 60/70's and apparently designed and built some motorcycle suspension during his lunch breaks for someone that won the Isle of Man TT during the 60's or 70's. Alas he has past and I cant find much information. The local Model Engineering society has a picture on the wall of him but the current members do not know him, and I know he was not a member but the supervisor of some of the guys that used to work in the tool room that were members.

Edited By Michael Edwards 1 on 29/12/2019 20:10:26

[Michael GilliganParticipant @michaelgilligan61133]

Great progress, Michael … and much easier than building a replica from scratch !!

MichaelG.

[Michael Edwards 1Participant @michaeledwards1]

Posted by Michael Gilligan on 29/12/2019 20:47:07:

Great progress, Michael … and much easier than building a replica from scratch !!

MichaelG.

Thankyou Michael. Well worth the 300 mile round trip to pick it up. Amazing person, I am going to keep him anonomus on here as he is a member.

[Michael Edwards 1Participant @michaeledwards1]

12. Drill bit now successfully Loctited in and cut off with a mini cutoff wheel

Time to start filing flush

13. Ok its destroying the paint work but hayho I can replace that. I think thats flush enough now.

Really happy with the pin it fits great

14. Removed both bearings this time so I can mask up to respray.

Also marked them up front and back and also saved the felt wicks for safe keeping.

15. All keyed and masked up for respray of etching primer before the matt black enamel.

I received the oil cups today from RDGTools. Doh!! I ordered 1/4" BSP They are the wrong size measuring 1/2" I should have checked my Zeus Book before I ordered. Oh well nice little project I can get my son on the lathe and get him to make me some. Time to produce some drawings for him. Get him off the XBox.

[Michael Edwards 1Participant @michaeledwards1]

16. Checking spindle on the comparator b y putting in a V-Block and turning slowly on the bearing surfaces to see if any deflection.

 

 

 

Well the bearing surfaces are perfect to within .0001"

 

Edited By Michael Edwards 1 on 30/12/2019 21:24:59

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Michael Edwards 1 on 30/12/2019 21:24:03:

[…]

Well the bearing surfaces are perfect to within .0001"

.

Well … it is a Pultra

MichaelG.

[Michael Edwards 1Participant @michaeledwards1]

Oh heck I noticed the collet key was missing so thats the next job to make a new one

[Michael Edwards 1Participant @michaeledwards1]

Posted by Michael Gilligan on 30/12/2019 21:34:31:

Posted by Michael Edwards 1 on 30/12/2019 21:24:03:

[…]

Well the bearing surfaces are perfect to within .0001"

.

Well … it is a Pultra

MichaelG.

Would love to know the age of this it certainly is well engineered.

[Michael GilliganParticipant @michaelgilligan61133]

… made just in time for WW2, I believe

MichaelG.

[Michael Edwards 1Participant @michaeledwards1]

Posted by Michael Gilligan on 30/12/2019 22:33:04:

… made just in time for WW2, I believe

MichaelG.

oh wow

[Michael Edwards 1Participant @michaeledwards1]

17. Just made a nice pair of oli cups.

[Author]

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