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MG TD TF 1500 - GENERATOR ARMATURE

Is there any way to repair a worn armature rear bearing area. Is a speedisleeve available?
Sandy
Sandy

Even the thinnest speedy sleeve would increase the shaft diameter so the rear bush would have to be reamed. Perhaps an easier way would be to turn the shaft down and press in an oversized bush into the rear plate. If you go metric there are lots of different sized bushes available. I am pretty certain the tacho gearbox end of the shaft has a chamfer on the bore to take a lathe running centre and the other side has a centre dot.

Cheers

Jan T
J Targosz

Why couldn't you turn down the armature bearing surface to fit a standard speedi-sleeve? They're available as small as .498"... is the shaft larger than that?
Kevin McLemore

Easiest repair would be to buy an undersized bush and ream it to fit the shaft. The cost for a machine shop to do it would be comparable to purchasing a new correct sized bushing.. at least here as I just looked at having that done.
MG LaVerne


The Moss catalog has an INFO sheet that states the dimensions for a standard bushing, but I could not find the dimension for the armature shaft itself. I wonder what the clearance for this bushing to shaft od was suppose to be originally.

Does anyone have a new armature they could measure so we have a reference for the shaft od?

Most of my used generator armature shaft to new bushing clearance was a little looser than I thought was best. I would guess about .003" would be ideal, even though most of the force is taken at the front ball bearing from belt tension.
Richard Cameron

The rear bearing seems to cop it from over tensioned belts. Dave DB's article "Keep Your Belts Loose" details this problem. Cheers
Peter TD 5801
P Hehir

The rear bearing area on a new armature from Holcome (sp?) is 0.5905 That is the same on all of the Lucas generators used on the MG, at least from the TDs through the early MGBs are the same. Cheers - Dave
DW DuBois

Hmm... Dave that makes the shafts essentially 15mm, yes?
Kevin McLemore

"that makes the shafts essentially 15mm, yes? "
Could be (if you swing that way :-) - I'm not sure that the Brits were using metrics at that time in their manufacturing (they certainly weren't using a decimal system with their money back then). Cheers - Dave
DW DuBois

Partly off topic.
We may not have used decimal currency. BUT
With20 shillings,8 half crowns,40 sixpences,80 thrupenny bits,10 florins and 960 farthings to the Pound we probably had the best mental arithmatists in the world.
Just to confuse things we also had the Guinea @ £1-1 shilling.
When I was serving my time in the fifties quite a lot of equipment was already metric.
Ray TF2884
Ray Lee

I meant to add that the ball race at the other end is a 6202zz which is a 15mm bearing.
Ray
Ray Lee

Wasn't the British military metric long before the changeover in 72? Just as the US military runs on metric today... I remember shillings and pence well.
Geoffrey M Baker

Not wanting to prolong this too much.
The STEN gun was the first British gun to use a metric round. It was the 9mm X 15 mm Parabellum round,(the same as the Luger) the STEN was made to use recovered German rounds. It is said that the enemy was safe if in front of a barn door. I believe it was made for troops and partisans behind enemy lines.
The next metric were NATO standard arms.
Ray
Ray Lee

This thread was discussed between 10/11/2015 and 12/11/2015

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