Hemmings Layshaft bearing

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DogT

DogT

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What's the deal here. I thought "Portugal" was the dreaded bearing that was supposed to be replaced? I just got this from Mick today.

Hemmings Layshaft bearing


Dave
69S
 
OH NO!!!!!!!! LOL LOL You got a point there. I think it should be fine, Mick must know what he's selling.
 
DogT said:
What's the deal here. I thought "Portugal" was the dreaded bearing that was supposed to be replaced? I just got this from Mick today.
Click to expand...

That's the TB bearing.

That particular Portuguese-made phenolic cage FAG bearing is fine, and it IS the special "Mick Hemmings" layshaft ball bearing, -unlike the Portuguese FAG bearings found in some late model gearboxes.


Hemmings 6203 TB bearing
Hemmings Layshaft bearing
Hemmings Layshaft bearing
 
LAB,
Thanks for clearing that up, so much information!!

Dave
69S
 
Irony isn't it, I think at this point you just sigh, shake your head and carry on ridiculosly :wink:
 
If I were doing the job over again, I'd use that Hemmings ball bearing. I bought the roller bearin and the rest of the rebuild supplies well in advance of the job so I wasn't gonna "waste" them once I found out about the Hemmings-recommended bearing. I'm sure the roller will do the job better than the one I took out - which also said "Portugal" on it (looked in fine shape, but that has a way of changing - fast - with bearings, so I'm glad it's at the local metal recyling plant instead of in my gearbox).
 
I guess Potugal isn't the issue it's the material and the manufacturing tolerances of the design.
 
In my experience it's the bearing ball cage that fails first. I would assume that the Hemmings bearing has a beefed up cage.

Cash
 
cash said:
I would assume that the Hemmings bearing has a beefed up cage.
Click to expand...

The Hemmings bearing has a phenolic cage, so presumably it's more able to cope with any shaft flexing or side loads that would eventually destroy a standard steel caged bearing?




RennieK said:
I guess Potugal isn't the issue it's the material and the manufacturing tolerances of the design.
Click to expand...

The FAG bearing is supposed to be a higher quality bearing, and I don't think the blame for the layshaft bearing failures lies with the Portuguese SKF factory or any other bearing manufacturer, as I expect the Norton factory probably used the cheapest bearings they could buy?
 
You got it Les. "Built to a price." Ugliest four words in the language.
 
Don't think we shpuld balme Norton too much on this one, a metal cage was the std job at the time and buying from a Global supplier making ISO std governed parts there should have been no issue.
 
Just out of curiosity, how much does Mick charge for that bearing? I'm in the process of rebuilding a gearbox and decided to call my local bearing supplier. He had to order it from his supplier, but is sending it directly to me for $29.95.
 
29.50USD is a pretty good price. I paid Mick 29.50 pounds which is about $44USD. Plus shipping, but I got a whole bunch of other stuff too. I didn't realize they may have been available locally.

Dave
69S
 
Steve Minning,
could you tell me where you found the bearing for 29.95?
I recently purchased a metal caged deep groove ball bearing from SKF and was planning to use this,
If I could get the pollymide caged one for 29.95 I would use that.
Thanks,
Marshal
 
'ball bearing versus roller bearing' I will start a new topic.
 
LAB,
from your pics it looks like the layshaft bearing cannot be removed w/o removing the minshaft gear as the teeth
on the mainshft gear appear to overlap onto the layshaft bearing cavity?
Is this so as I was planning on replacing the layshaft bearing with the trans in the bike and leave the mainshaft in place.
I just wanted to remove and replace the layshaft bearing w/o disassembling the primary side.
Can I do it this way?
Thanks,
Marshal
 
Marshall,

Yes, you can change the bearing in situ, with the mainshaft still in place. I did mine that way this past weekend. The angle of the photo does look like there's interference, but the outer race will clear.

Mine was kind of a PIA cuz the bearing stuck in the case when I pulled the layshaft out. Getting the bearing puller in there while working along side the mainshaft was fiddly, but it can be done. And stuff does get warm in there when you heat the case....

Good luck!
Ted
 
MarshalNorton said:
Steve Minning,
could you tell me where you found the bearing for 29.95?
I recently purchased a metal caged deep groove ball bearing from SKF and was planning to use this,
If I could get the pollymide caged one for 29.95 I would use that.
Thanks,
Marshal
Click to expand...

I spoke with Miller Bearing. They're a local bearing supply house here in Orlando. I simply asked for a FAG 6203 TB bearing with Polyamide cage. I would expect that you can get them through any bearing house.
 
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