Can you put too many bearings in a hub?
09-19-21, 08:18 PM
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Can you put too many bearings in a hub?
I am rebuilding a 1990 MTB with Deore hubs. If I recall, when I opened it up, out came 9 bearings. When I repacked them, I was able to get 11 in. Should I go back to the 9 or is the 11 ok/better?
09-19-21, 08:32 PM
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Originally Posted by Lbxpdx
I am rebuilding a 1990 MTB with Deore hubs. If I recall, when I opened it up, out came 9 bearings. When I repacked them, I was able to get 11 in. Should I go back to the 9 or is the 11 ok/better?
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09-19-21, 08:40 PM
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Originally Posted by cyccommute
9. If you use too many the bearing will bind. Loose bearings should look like there is room for one more but that one can’t fit. 11 is way too many.
thanks
09-21-21, 04:14 PM
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Originally Posted by Lbxpdx
I am rebuilding a 1990 MTB with Deore hubs. If I recall, when I opened it up, out came 9 bearings. When I repacked them, I was able to get 11 in. Should I go back to the 9 or is the 11 ok/better?
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09-21-21, 04:51 PM
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Originally Posted by ThermionicScott
Are you using the right ones? They should be 1/4" in back and 3/16" in front.
09-22-21, 12:21 AM
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Can you put too many bearings in a hub?
A few times I've overhauled a used hub that was new to me, and there's been one bearing too few. Always seem to be a Campy hub, too. Never understood that.
09-22-21, 06:22 AM
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https://si.shimano.com/api/publish/s...-M550-1116.pdf
https://si.shimano.com/api/publish/s...-M550-1106.pdf
https://si.shimano.com/api/publish/s...M650-1100A.pdf
https://si.shimano.com/api/publish/s...-M650-1115.pdf
Shimano says 9 on each side of the rear hub(1/4") and 10 on each side of the front hub (3/16") for the 7 speed Deore DX and LX of that era.
https://si.shimano.com/api/publish/s...-M550-1106.pdf
https://si.shimano.com/api/publish/s...M650-1100A.pdf
https://si.shimano.com/api/publish/s...-M650-1115.pdf
Shimano says 9 on each side of the rear hub(1/4") and 10 on each side of the front hub (3/16") for the 7 speed Deore DX and LX of that era.
09-22-21, 08:53 AM
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Originally Posted by SurferRosa
Sort of a good question. And if you're using the correct size bearings, I don't think you can put in too many to allow for proper adjustment.
A few times I've overhauled a used hub that was new to me, and there's been one bearing too few. Always seem to be a Campy hub, too. Never understood that.
A few times I've overhauled a used hub that was new to me, and there's been one bearing too few. Always seem to be a Campy hub, too. Never understood that.
Give ‘em space. Every bearing in a bicycle should look like it has space for one more bearing but they really can’t take that last one.
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Twisting Down the Alley. Misadventures in tornado alley.
09-22-21, 12:44 PM
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Originally Posted by cyccommute
By having what looks like one bearing missing, the bearings have space to spread out and roll individually rather than keep bumping into its neighbors.
09-22-21, 10:43 PM
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Its an old school thing that applies to many types of old equipment that used bearings and races. As a kid was rebuilding an old 8hp swamp cooler motor that had the brushes and bearings missing from one end of the armature. Guy at the junk yard told me to after cleaning line up 1/4" balls without the grease then remove one and then grease it up to assemble. It worked fine for years.
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09-23-21, 07:46 AM
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There's no good reason to use fewer than the recommended amount, though. "Full race minus one" is what you do if you don't know how many balls are recommended or if you're bad at counting. I don't know why we're on this tangent...
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RUSA #7498
Originally Posted by chandltp
There's no such thing as too far.. just lack of time
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