Trailer bearing Identification

[BruceB]

I did the annual bearing and brake service yesterday and had to change all the brake shoes and three out of four bearing sets.
I need to buy new bearing sets to carry as spares to replace the ones used but have run into a little problem in that I want to buy them from bearing sellers rather than as packs from a trailer dealer since I want so many.
One of the bearings is causing me some grief, on the trailer ident card is says 48548 inner 48510 outer.
What is in was L48549X inner and LM48510 outer and to make matters worse some trailer dealers are showing one code and others the other code.
I can easily and cheaply get 48548/48510 bearings from many places but what is the difference between them and why are both shown as be suitable for my axle depending on where you look.
The hubs are 203 x 40 AR 5.5inch Avonrides

[Trailer Guy]

People might be tripping up because Avonride did three hubs that will take 203 x 40 brakes (and also with that PCD), but also took 200 x 50 ones too. You should have a casting number on the drum, hopefully, which should help you.


It sounds to me like you may be being misled by the ident card too. 48548 is an inner cone and 48510 should be it's matching cup, not the outer bearing number. And, just to compound the issue, Avonride only usually fitted this size bearing outer to a 250mm sized drum! Also could this: "L48549X" have been misread and the 9 actually be an 8? As this would be more likely.


Anyway, all of the above is throwing up more questions than answers, so sorry for that. This may help you, though. This is the casting number with the correlating bearings, for the Avonride 203 / 200 drums:



Casting number 11890
Inner cone LM67048
Inner cup LM67010
Outer cone 32004X (outer cup inc.)
Seal 250.168.37
Dust cap diameter 47mm



Casting number 13856
Inner cone LM67048
Inner cup LM67010
Outer cone L44649
Outer cup L44610
Seal 250.168.37
Dust cap diameter 60mm



Casting number 16035
Inner cone LM501349
Inner cup LM501310
Outer cone LM501349
Outer cup LM501310
Dust cap diameter 82mm



Hope above helps. If not, feel free to post up again


All the best

[BruceB]

I am sure it is a 9 on the existing bearings and these were supplied with the trailer.
The bearings on the trailer indent card are definitely -
Outer cone/cup 44649/44610
Inner cone/cup 48548/48510

The actual fitted bearings are-
Outer cone/cup 44649/44610
Inner cone/cup 48549/48510

The L48548 quoted on some suppliers websites is identically sized apart from about .03mm less depth.
I'll take the bearings into a bearing supplier tomorrow in Inverness and ask for equivalents. When I am buying four sets at a time the saving by buying non trailer bearing packs is considerable, hence the point of identifying them to buy at an engineering supplier!

Incidentally the seal number is 262 162 037 which doesn't match any of the above!

[thomas]

If it helps, when I ordered bearings for my Knott hub, (160 00 & 200x50) Autow told me the numbers had changed and sent me a 44649 outer and a 48548 inner - Meredith and Eyre, who made the axle, backed it up. My hub takes the same bearings as a 203x40.

[Trailer Guy]

Lol, don't you just love bearings! Good luck with it, I'm sure the bearing suppliers will sort you out, no problem

[BruceB]

I went into two bearing specialists today and ended up ordering the 48548/10 bearings, I doubt it will be noticed that my hub track per axle overall will be 0.06mm narrower than it was.....

The 48549'/10's were available but at £40 each as they were now discontinued and only precision grades were now available. I still can't figure out why the manufacturer fitted different bearings to the one on the trailer indentification card supplied with the trailer though...

I ended up getting three full sets of two bearing sets and one grease seal for £30 total, better by far than the same bearing pack at £20 a set from the trailer dealers. simples!

[IBWET]

Originally Posted by BruceB

I went into two bearing specialists today and ended up ordering the 48548/10 bearings, I doubt it will be noticed that my hub track per axle overall will be 0.06mm narrower than it was.....

The 48549'/10's were available but at £40 each as they were now discontinued and only precision grades were now available. I still can't figure out why the manufacturer fitted different bearings to the one on the trailer indentification card supplied with the trailer though...

I ended up getting three full sets of two bearing sets and one grease seal for £30 total, better by far than the same bearing pack at £20 a set from the trailer dealers. simples!

That's a very good price,..who was the specialist,I just bought 3 sets (two wheels and a spare) from Bradley direct for £75 including caps pins and nuts. Bearing services in Glasgow wanted £110 for 2 sets...so pays to shop around.