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Cymber
United Kingdom
966 Posts |
 Posted - 16/07/2007 : 20:17:14
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Can someone please let me know the correct exact bearing diameters for P Type stub axles.
Maurice, |
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Peter Scott
United Kingdom
1240 Posts |
Posted - 16/07/2007 : 20:53:53
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Maurice
The hub bearings for a PA are as follows, all measurements in mm:
Front Inner - Part no 6304 ID 20, OD 52, W 15
Front Outer - Part no 6205 ID 25 OD 52 W 15
Rear ........ - Part no 6208 ID 40 OD 80 W 18
Peter |
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Cymber
United Kingdom
966 Posts |
Posted - 16/07/2007 : 21:58:23
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Thanks Peter.
I have not made myself clear. What I need to know is the correct diameters of the stub axle itself onto which the bearings fit.
Maurice |
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Peter Scott
United Kingdom
1240 Posts |
Posted - 17/07/2007 : 09:58:25
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Maurice
Sorry that I read your question the 'wrong way round'. You will need one of the experts to give you the precise diameters of the stub axle.
Peter |
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Bruce Sutherland
United Kingdom
1579 Posts |
Posted - 17/07/2007 : 10:44:07
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Detail bearing fit tolerances can be found on a bearing manufacturer's technical website such as www.tec.nsk.com.
Cheers - Bruce (PB0564)
Bruce. |
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Cymber
United Kingdom
966 Posts |
Posted - 17/07/2007 : 20:19:36
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Thanks Bruce I tried it but the site is down at the moment, will try again later.
Maurice. |
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Cymber
United Kingdom
966 Posts |
Posted - 19/07/2007 : 20:39:42
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Presumeably the difference between J & P Type stub axles is because of the change from felt to lipped seals. Can I therefore assume that it is acceptable to machine a J axle to become a P one.
Having just crack tested four stub axles I now realise why they break, the radius between the shaft and the body is covered in machining marks which are all stress raisers. Would it not be sensible to pollish these out? Has any one done this?
Maurice. |
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George Eagle
United Kingdom
3244 Posts |
Posted - 19/07/2007 : 21:24:24
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Hi Maurice
I believe the only difference between J and P type stub axles is the landing for the seals. In the J/L the landing is of larger diameter to take the felt seals wheres that on the P type axle is of a smaller diameter to take the lipped seals.
I had the landings for the seals on L2023 machined down to take lip seals, all I needed was new smaller diameter inner spacers.
Regards George |
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Cymber
United Kingdom
966 Posts |
Posted - 23/07/2007 : 19:54:42
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Is it usual these days to use sealed or unsealed bearings in front hubs? at least a single sealed outer bearing would seem to be a good idea. For P Type hubs it is probably neccessary to use steel bodied seals as the original ones but are they still available?
Maurice. |
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John Reid
United Kingdom
705 Posts |
Posted - 24/07/2007 : 00:19:10
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Maurice,
I recently replaced the wheel bearings in our P-type and used -2RS sealed bearings. I also used a neoprene oil seal, E708 4 SC 225 150 3l. A good fit and no machining required. So far so good.
All parts are available from Jonathan Welch who is rebuilding a P and is a regular contributor to the forum. His user name is Bodger, but he's not! Excellent service.
John R |
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talbot
United Kingdom
718 Posts |
Posted - 24/07/2007 : 08:55:22
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I was informed by MG T series enthusiasts from the States that the seals in sealed bearings are there to keep pre packed grease in and dirt out. If sealed bearings are used in hubs won't this prevent grease, packed into the hub at a service, getting into the balls and tracks?
Jan T |
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Cymber
United Kingdom
966 Posts |
Posted - 24/07/2007 : 21:34:04
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These front hubs of mine are getting "curiouser and coriouser". I have four original hubs in which the distance between the bearing abutments measure :- 1.210 1.210 1.214 & 1.181 inches. The spacers measure :- 1.185 1.235 1.184 & 1.187 inches, only the longest one shows no sign of wear. Surely these dimensions should be the same. Can someome please tell me what the correct dimension is?
Maurice. |
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