| T O P I C R E V I E W |
| melle | Posted - 27 Aug 2018 : 21:01:55
Does anyone happen know what the dimensions of the front wheel bearing inner seal are?
The outer is 50-70-10/8, what does the 10/8 denomination mean? I asked my father in law who has been working in the industrial power transmission industry for a couple of decades, but he'd never seen it before. I have a double lip 50-70-10 seal I trust will work just fine, but I'm curious now.
www.saabv4.com |
| 11 L A T E S T R E P L I E S (Newest First) |
| melle | Posted - 01 Sep 2025 : 11:56:46
The new seals (fitted in 2019) have lasted 6500km/ 4000 miles... They're cheap enough and I have a few spares, but I'd still be interested in a suitable high rpm/ automotive alternative so I don't have to replace them every five years.
www.saabv4.com |
| melle | Posted - 17 Jan 2019 : 19:03:48
quote:
Originally posted by melle
Will see what happens.
I took the old hub apart; the lips on the outer seal had completely worn away, resulting in the grease leaking out and the bearing starving of lubrication. I've fitted that seal in 2011 and it has done about 17000km before it failed. The other side has the same seal fitted and so does the hub I just installed, this was the last of my stock. I'll keep an eye on the other side and expect to be doing this one again in a few years' time.
If anyone knows where to get decent quality seals for this application, please give me a shout, I can do with four of each.
Inner: 42-65-10
Outer: 50-70-10
Permissible rotational speed min 45m/s
www.saabv4.com |
| melle | Posted - 30 Aug 2018 : 09:02:08
10m/s and up to 100 degrees C or 120 peak is what I could get locally (in NL). 100mph is about 45m/s. A well greased bearing shouldn't get hot I'd say, but friction on the seal surface may be an issue.
I'm not sure what type of seal you get with new bearings, but I do know from experience they're absolute sh!te. Some of the bearings currently available seem to be of the 2r type (rubber seal both sides) which removes the need for an external seal. I'm using a complete hub with a good used bearing that I've washed out and repacked with grease.
What did you find?
www.saabv4.com |
| RhysN | Posted - 30 Aug 2018 : 07:21:23
What revs are those industrial seals rated to Melle? The ones I found have a rotational speed of 30 metres/second, and up to 200 degrees C. |
| melle | Posted - 29 Aug 2018 : 20:46:05
That's what I fear. I bought a nitrile seal, viton seals are bloody expensive and I'm not sure they would do the job either if rated for lower rpm.
www.saabv4.com |
| beardydave | Posted - 29 Aug 2018 : 20:21:53
Might be able to get round that with material choice. What material did you go for on the industrial seal?
If the seal is static it wont centrifuge out from the shaft and let grease out. If its shaft mounted you could hve problems.
If you run faster than rated sliding contact speed it will heat up more and degrade the material faster. Possibly even on first use. |
| melle | Posted - 29 Aug 2018 : 18:21:14
Haven't found any seals for automotive applications, so I ordered SKF industrial seals which are rated for a much lower rpm. Will see what happens.
www.saabv4.com |
| melle | Posted - 28 Aug 2018 : 18:59:07
Inner is 42x65x10. I have difficulty locating the correct type seals for this application online, will contact a local real world supplier.
www.saabv4.com |
| melle | Posted - 28 Aug 2018 : 12:40:40
Steve, it's the size on the actual seal. Thanks Stefan, that makes sense! Will take a hub apart to check the rear seal dimensions and post here for future reference.
www.saabv4.com |
| StefanM | Posted - 28 Aug 2018 : 09:35:10
It is a seal that have two different heights. Saab used similar seals on the transmission also. Lied flat on a surface the outer edge is 8mm. Measured at the liparea it is 10mm.
Most often replaced by standard 50-70-10. |
| stevebod | Posted - 28 Aug 2018 : 08:21:59
Hi Melle,
I don't know either but could it be an alternative size? Were there two housing used or something like that, which mean a 10mm or 8mm thick seal is needed depending on the situation? |
