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Front hub with large bearings??

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Front hub with large bearings??

Old 06-03-17, 02:55 PM
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jawnn
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Front hub with large bearings??

I changed the bearings on my front Surely hub and discovered that the balls were only 1/8th inch.
Does that make them not last as long as the inch balls on my rear wheel?

1/8th inch balls are closser together so maybe it does not make much difference?


What kind of front disc hub can I get with 36 spoke holes and inch balls in cartridge?


I got this Surely hub be cause it was the only one I could find with cartridge bearings. But I think by now there must be a larger selection....I hope.
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Old 06-04-17, 03:22 AM
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As long as its clean, it doesn't matter much. The main advantage to bigger balls is contamination. Regardless of bearing size, the size of the dust/grit making its way in will be the same.
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Old 06-04-17, 05:30 AM
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Working in a bike shop
having opened up very many hubs.

given a hub is undermaintained or badly adjusted(IE, factory default bearing adjustment, never been changed)
and there's enough roughness to warrant opening up and checking:

of those, Front hubs I Always see pitted cones.
and Rear hubs about 1/2 I'll see pitted cones.

So I'd say, the larger 1/4" bearings and larger diameter cones found in rear hubs, have more Tolerance to bad maintenance.
But if you take care of things, 1/8" is OK.


Ironically, working on everyone else's bikes means I never have the energy to pay attention to my own.
So I take comfort, in having 1/4" ball bearings in the front hub.
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Old 06-04-17, 08:26 AM
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No , because there are more of them sharing the load.




...
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Old 06-04-17, 09:38 AM
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I just bought a 1973 CCM with a caged 1/4" ball front hub. It's FAR better than the finicky small ball Raleigh hub I had. Not sure if it is better than a new sealed cartridge hub.
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Old 06-04-17, 09:51 AM
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Originally Posted by fietsbob View Post
No , because there are more of them sharing the load...
This. Smaller bearings mean more bearings, which mean more contact surface, so each individual bearing ball is carrying less load.

My front hub used sealed bearings, and will accept a 20mm through-axle, so the cartridge bearings are huge. They're bigger than the bearings in the freehub. So if the OP wants heavier duty front bearings, go to a sealed bearing hub for a big axle.
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Old 06-04-17, 09:58 AM
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Old School...My Bullseye Freewheel hubset uses 4 of the same bearing, in both hubs , a 6001 cartridge,

I have Enduro brand bearings in it now , an all ball, 90% fill..

(original had separators, an electric motor bearing use, perhaps. I expect he got the best price for buying hundreds of those)


[Early Pugsly fat bikes used a rear hub in the front wheel]





....
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Old 06-04-17, 12:30 PM
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what kind of matanince can I do on a sealed cartirdge?

I did once see a mention of how to open them up and regrease them. and of course make sure they don't get crooked in the seating....
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Old 06-04-17, 01:14 PM
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Originally Posted by jawnn View Post
what kind of matanince can I do on a sealed cartirdge?

I did once see a mention of how to open them up and regrease them. and of course make sure they don't get crooked in the seating....

You can carefully remove the rubber seals and flush out the old lube, allow them to dry and then relube them. They are relatively cheap so you can easily replace them.


If you look around to the different manufacturers of the bearings you can find the speed and load ratings for yours. The results will show that they are more then adequate for a bike wheel.
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Old 06-04-17, 02:44 PM
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Originally Posted by jawnn View Post
I changed the bearings on my front Surely hub and discovered that the balls were only 1/8th inch.
Does that make them not last as long as the inch balls on my rear wheel?

1/8th inch balls are closser together so maybe it does not make much difference?


What kind of front disc hub can I get with 36 spoke holes and inch balls in cartridge?


I got this Surely hub be cause it was the only one I could find with cartridge bearings. But I think by now there must be a larger selection....I hope.
they are 3/16" balls, not 1/8"

there should be ten of them, per side

IF you try and stuff 1/4" balls in there, you WILL ruin your axle cones, and possibly more...
you will also have LESS contact points, so there is NO ADVANTAGE to putting 1/4" balls into a 3/16" ball setup, PERIOD.

then... there is the fact that installing those 1/4" balls will make your hub not fit into the fork dropouts.... and the SEALS will no longer be positioned correctly.... etc.......
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Old 06-04-17, 02:46 PM
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Originally Posted by dabac View Post
As long as its clean, it doesn't matter much. The main advantage to bigger balls is contamination. Regardless of bearing size, the size of the dust/grit making its way in will be the same.

wrong, in all respects.... except for "clean".

read my reply, above this reply, please.
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Old 06-05-17, 01:47 AM
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dabac
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Originally Posted by maddog34 View Post
wrong, in all respects.... except for "clean".

read my reply, above this reply, please.

I'm not sure what you are referring to.


If you think I'm suggesting running bigger balls than intended in a cup & cone would be OK then I'm not.


There might be some combo where switching between inch-sized and metric sized balls (or the reverse) would let you get away with running a (slightly) larger ball w/o significant consequences.


But generally I would not expect anything good from stuffing the wrong sized balls in a cup&cone bearing.


I was - and thought everybody was - talking about the consequences of ball size as such as part of bearing characteristics.


And for that I remain convinced that the main difference between smaller or bigger balls (in an otherwise appropriate bearing) is how sensitive they are to contamination.


The inline skate indistry flirted briefly with what they called "Micro" bearings.
Looking at the specs as such, they'd do the job.
And for fair weather riding they did OK - for a while.
But for touring they sucked. Very poor rain/wet road survival.


Or look at pedals.
I've utterly destroyed 2-3 outboard bearings in Crankbrothers pedals only this year.
Meanwhile my sister is still happily commuting on an old set of flatties, once of them with the endcap entirely missing.
Sure, hers is running a little rough, but it's not turned into shrapnel.


Or look at outboard bearing BBs.
Far smaller balls, and a lot more reported issues than similar quality (Square taper) cartridge BBs.
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Old 06-05-17, 07:27 AM
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davidad
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Originally Posted by maddog34 View Post
wrong, in all respects.... except for "clean".

read my reply, above this reply, please.

Wrong. They are not cup and cone bearings.
Surly Ultra New Hub Axle Kit for 100mm Front Black | 365 Cycles
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