Member postings for Rockingdodge

Address is incorrect, probably 74 North Street Downend Bristol BS16 5SF

Yes but only Gods are allowed to eat Ambrosia

Cont. from last post

Top on to avoid bits falling in.

Fit cover for the belt pulleys and clutch spring, this is a real PITA as there is minimal room where the cover has to be held in one hand and the belts wrangled over the clutch spring and the double pulley especially as it's a heavy casting.

Then it's the change wheel train and support plates to fit and adjust, I did run the lathe berforhand to check correct meshing and change of speeds, and then run up the gearbox and check all speeds and leadscrew and feed, all works as expected.

Just need to fit the covers and we're back in operation

Roger

Ok so reassembly starts

Mandril inserted into orifice

Chuck spindle inserted feeding it through the main gears and gear on left that meshes with the Mandril

Chuck spindle re-inserted feeding it through the main gears and gear on left that meshes with the Mandril the right way round

Front bearing retaining cap fitted

cont. in next post

Roger

Collected replacement mandril from Simon

And milled the keyways out

Strangly the key on the outside of the head was quite slack in the change wheels so I'm making up a replacement key to fit.

Roger

Will do, sahould be collecting a newly made mandril tomorrow morning. I will need to do a couple of 3/16" keyways and then it's the rebuild.

Roger

City still desperately needs a bypass though to relieve the traffic on the Ross - Leominster route

Roger

ex Herefordian?

You traitor

All checked and ok, these lathes are built like a tank and very unlikely to twist under stress.

Roger

Thanks Graham but I'm sorted now.

Strange how a couple of you pop up out of the woodwork, Forest of Dean, geddit?

Ok now retiring to my padded quiet room.

Roger

Simon has kindly offered to make a new one for me and he lives only 10 miles from me but it is a more tortuous journey than you would think, back of beyond would probably describe it. Certainly an interesting drive.

Thanks to all who offered help and or advice, very much appreciated.

Roger

Edited By Rockingdodge on 02/08/2023 12:16:10

I totally agree, I'll take out the taper pin and fashion up a brass replacement and see how it holds up when threading, the motor is a circa 2kw one and I thread at 30rpm so it'll be interesting to see if it holds up against that kind of torque.

Roger

I must investigate if this is a just a taper pin or meant to be a weak link

Doesn't give the pin at the end of 4/316 a number so maybe replace it with some cheddar cheese might work?

Roger

Sorry Martin had to do this

4/487 is the part broken

snipped out of the circa 1937 user manual

Apologies can be considered

Roger

Haha, I knew it didn't look right but my meds have been messing my head lately so I knew someone would put me right

Oh and that ape is a silverback gorilla..... watch out

Roger

And you're going to run the fixed steady on a bearing surface?

I am a member even though I haven't visited for quite a while but their lathes don't have large bores except for possibly one that isn't that accurate any more, also they are committed to building a couple of 7 1/4" locos.

Roger

Nope, would need more than 30rpm and a small toolpost to damage it, didn't even mark the piece of metal it was holding.

Strangely the power feed has a clutch built into the spindle but the leadscrew doesn't, I suspect it might of had a shear pin in it's early life but was replaced with one that wasn't a shear pin!!!

Roger

Yep, love to do that , please see below

That's what was necessary in order to retrieve the bit of shaft with a 40 tooth gear attached to it, so no chance of machining any time soon besides my spindle bore is 3/4" and I would be machining with at least a 4" stickout with no support, not a good scenario for accurate work.

Roger

Stupid me had an episode while setting up the lathe to do a 6tpi internal thread and crashed the toolpost into the chuck. This snapped the end off the mandril that takes a feed from the chuck spindle out of the head for running the treading spindle and the power feed.

Is there someone who could face, drill and ream the end to take a new piece, either to press fit, silver solder or some other way of reparing it for me?

The largest diameter of the shaft is 1", the diameter of the bearing surfaces that run in I think a Babbit bearing is 0.75" and the broken bit is 0.5" with a 3/16" keyway that I could do on my mill.

Overall length is approx. 5"

I live in Ross-on-Wye, Herefordshire but could mail the bits if anyone can help please?

Thanks

Roger