The Stovebolt Site Forums The Parking Lot Tons 'o Fun Wheel seal for roller bearings

Well, I got my inner rollers for my 3/4 ton today. I waited on getting a seal, so I could match them to the bearing. (Timken lists 2 different seals anyway, depending on the bearing you use.)

Does the seal ride on the spindle or the bearing spacer?

Anyone have a part number?

Hy Whitedog, could you tell us what year 3/4 ton you're asking about, and seeing as how you wonder if the seal rides on the bearing maybe the bearing number as well.

His pictures are of a 1954.

My original concern was with the thickness of the seal and the new bearing. Upon inspection it doesn't really seem to be a problem. I actually have a new problem though. The old felt seal, absolutely won't fit over the new bearing. The inner sleeve has a slighty larger outer diameter than the old one.

Timken has 2 listings for use with a B46 style bearing; #40973s with an i.d. of 2.093 and a #5756 with an i.d. of 2.062.

I'm going to have to research it more, but I believe I'm going to have to find a seal with a rubber inner lip and not a felt type seal.

Whitedog,

I have 2 sets of the 1-ton roller bearings, one for each of the two projects I have going.

I, like you, found that the o.d. of the inner race is larger than the original bearings. In addition, the set of bearings I purchased within the last year, don't even have a machined surface on the o.d. of the race. The set purchased about 4 years ago do have the machined surface.

I've measured everything and came up with the following results.

Ball (original) bearing -> race o.d. 2.093 (ground finish)
Roller bearing set # 1 -> race o.d. 2.153 (ground finish)
Roller bearing set # 2 -> race o.d. 2.157 (rough surface)

Both of these roller bearing sets are manufactured by MBS bearing in Japan who seems to have a good reputation. MBS Bearings, Japan I think they are the only ones producing these bearings.

I found a table of seal clearance guidelines and for anything under a 4" shaft, the clearance was +/- .030". There is clearly a problem with the o.d. of the bearing race.

The bearings with the rough surface are simply unusable. Seal manufacturers are very clear on what is a smooth enough surface. i.e. smooth with no tool marks

I may be able to find a seal with a 2-1/8 (2.125) shaft diameter specification that would work for the bearings with the finished o.d. surface.

How ironic this is. I have my inner bearing and vernier caliper in front of me as we speak. I was literally scouring through the Timken catalogs. I just came up with seal # 476535.

2.125 shaft
3.154 OD
.375 Width

Rock Auto has them for $10.63

I already have the 40973s seal, it seems like it'll work. If not I'll get the other.

I also came up with a Timken brand bearing that may be interchangable. It'll require a 9/32 thrust bushing behind it though. Right now it looks to be about 1/2 the price as the MBS. I'll have to see what the bushing will cost though. It may not be economical.


Chris

Following your lead I found another couple that may work in the Timken catalog.

55X80X8 & 55X80X8V

Different seal material & slightly different seal design between the two.

Maybe not so far up the creek after all.

John

That Timken site is awesome! There's literally everything you need there to cross over a bearing.

For a tapered outer wheel bearing I have a 1280/1220 combo. The dimensions are identical the b45 outer ball bearing.

For the inner b46 I get:

27880/27820 and 27881/27820 combo. Like I said before, all you need is a 9/32" thick 2" ODx 1.5 ID thrust bushing to make them work.

These bearings are already in production too. The 27880 was used on 46-52 Fords and 87-91 Ferrari's. The 277881 was used by IH from 55-72.

It's too bad I already bought the MBS.

Chris

You can let the seal ride on the thrust bushing, that's how it's done on MGBs the inner and outer timkin with a bushing is how they do it.
The seal runs on the spacer
Seems like you guys have done the leg work for me