ward 2A lathe

[Bob McDougallParticipant @bobmcdougall63250]

Wear on the auxilliary Capstan slide has become apparent! . a centre drill is about 30 tho below centre. . The majority of the wear is on the lower section but the upper capstan slider has some signs of wear also. The wear appears to be front heavy so the whole capstan carrige is tilted forward and lower.

the wear from where the gibb strip was located to the moving upper capstan section.

also wear of the capstan head into the capstan saddle.

on bothe sides

ANY options appreciated.

our thoughts are, moglice or equivalent.

Scrape the capstan slider (top bit) flat , cut down the capstan saddle (bottom bit fixed to the bed) and moglice it. but we will still be down due to the turret wear. but we could shim the turret up as its wear appears even but not sure if it is because of the cutting direction you would expect more wear on the frontside ?

Anyone around SN16 would apperciate help. we have got this far but we are not precision engineers.

Have purchased a surface plate and 1" wide cast iron bar to make a straight edge and will run a dial indicator over all the parts we can to get an idea of wear. next post might be in scraping.lol.

[David George 1Participant @davidgeorge1]

Hi have a look at Turcite. It can be glued and screwed to slideway parts and is a permanent repair but will need machining etc.

David

[Bob McDougallParticipant @bobmcdougall63250]

Hi David, yes we are looking at all options, what we are unsure about is just what acuracy is needed in the capstan head. clearly this machine was used to the point when we now have it so it was making parts even with this wear so if we can gain 90% of the origional acurracy . is that good enough. ?

What is the effect of a low center height capstan head ?

my thoughts are ,a centre drill will cut an off centre hole.

a drill will cut a taper

If we know these faults can we compensate for them ?

any hole over drill size is cut by the borijng tool so no problem

small drills will bend to adapt to the centre drill hole.

???

[Howard LewisParticipant @howardlewis46836]

As you say, an off centre capstan will result bin inaccurate work. A Roller box, having been set to metal turned with a toll in the toolpost, will then cut off centre and probably produce undersize and / or tapered, IF the rollers will enter on the job. And, probably the wear is not even, so the capstan will actually be inclined, and be even more likely to produce a taper.

Sounds like the fault needs to be corrected by whatever means, mill back to level and then fit packing to return to design dimension. (Raglan lathes had hardened ways which were bolted to the bed, so that they could be replaced when when worn. So, a similar technique seems needed here )

Keep up the good work. You will have a good solid machine when all is finished.

Howard

[James TarffParticipant @jamestarff78077]

Hi there could you inform me witch way the Hoffman N1055 bearings go I took my A2 to bits some year ago then I fell ill and I’m just now getting back to doing the job I like and not the jobs I have to .my memory as taken a hit but I need to make sure .Are the bearings face to face in the or face to back .On the Hoffman bearings the it as the bearing information and the word thrust .My head is telling me to put one bearing with the thrust facing the chuck then the spacers and the second bearing with the thrust facing the spindle nuts on the brake.I hope that someone can help as I would love to rebuild this old girl

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