parallel bearings

Actually the inner and outer bearing are slightly different on the inside diameter as the outer bearing shaft is slightly smaller than the inner (so slightly miss named)

I know this as I just purchased a spare set for the camper as cheap insurance for any future bearing problems, as they always say if you have a spare you will never need to use it and hopefully that theory holds out for a long time to come.

I think the naming comes from the fact that both inner and outer bearings have the same outside diameter.

Cheers Glen

G'day Glen,
Yeah, I guess that's why I slipped the word "usually" in there... There's always an exception .. (Then again, mine might be the exception;-))

What I described is accurate in relation to my trailer, which has the axle shafts machined to 1 3/8" (yes, parallel;-)) to take the Ford 68149 bearings all round (inner & outer)..

The trailer that this (current) one replaced was similar in that the shafts were again machined parallel, only on that one they were machined to 1 1/4" to take the 67048 Holden inners..

As you point out, the OD of the outer race (cup) for both these bearings is the same (2 5/16")...

I wonder how many more different configurations there are out there?

It would seem that there are a few axle makers who have to be 'different' just for the sake of it;-)

Like Ed, mine on the CT are the ford bearings, same part number inner and outer.
That outer bearing is a lot bigger than the outer on the box trailer. :o)

I Also use the L68149 bearings.

Ian