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Mismatched Number of Balls in a Hub Bearing

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Mismatched Number of Balls in a Hub Bearing

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Old 06-23-15, 07:05 AM
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Mismatched Number of Balls in a Hub Bearing

I dismantled the hub of my wife's bike this morning and found that one side had 8 bearing balls while the other had 9. I am sure that I did not drop a bearing as I had a cloth over my lap. Has anyone else ever found a bearing to contain a different number of balls on either side?
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Old 06-23-15, 07:11 AM
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Originally Posted by rodscot
I dismantled the hub of my wife's bike this morning and found that one side had 8 bearing balls while the other had 9. I am sure that I did not drop a bearing as I had a cloth over my lap. Has anyone else ever found a bearing to contain a different number of balls on either side?
Yes. Once on an older bike I was rehabbing. Just figured previous "mechanic" lost count or factory mistake. Wouldn't surprise me a bit to find wally world bikes with differences!
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Old 06-23-15, 07:17 AM
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Check inside the hub shell as a bearing ball will sometimes disappear into the interior. Otherwise it was an assembly mistake somewhere along the line.
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Old 06-23-15, 07:42 AM
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Was this a front or rear hub? I assume the rear. Yes, there can be a different number of bearings on each side for the rear hub as well as dfferent size bearings on each side. Look close and compare the sizing.

Last edited by Jicafold; 06-23-15 at 07:49 AM.
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Old 06-23-15, 07:53 AM
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I've seen different sizes, and hence different counts, on the left and right sides of rear hubs. Not often. But it does happen.

Don't sweat it though. Just put back as many as will fit in the race. Don't cram in the last one, because there is usually almost enough space for one more but not quite enough, and you want that little bit of free space. Get the size right of course. Then just fill in the race.
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Old 06-23-15, 07:54 AM
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Originally Posted by Jicafold
Was this a front or rear hub? I assume the rear. Yes, there can be a different number of bearings on each side for the rear hub as well as dfferent size bearings on each side. Look close and compare the sizing.
+1
Not that uncommon for hubs with a definite left/right difference to use different bearings.
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Old 06-23-15, 08:32 AM
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Thanks, it was the rear hub.

I did check inside the shell but nothing there. Having read the responses here now, I reckon that there is no 'missing' ball. I am sure that both races are the same size - the balls are definitely the same size - but will look more closely to make sure. I have ordered some more balls and will do as suggested by adding back as many as will fit inside comfortably without forcing or 'squashing' them in.

Last edited by rodscot; 06-23-15 at 08:35 AM.
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Old 06-23-15, 08:35 AM
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You sure one didn't sneak out stuck to the axle?
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Old 06-23-15, 08:36 AM
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Specifying WHICH hub would go a long way to giving you a correct answer.
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Old 06-23-15, 08:37 AM
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Originally Posted by ThermionicScott
You sure one didn't sneak out stuck to the axle?
No, checked the axle and cones. The clothes, the floor, even my trousers. I am sure the garage mice got there before me.
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Old 06-23-15, 08:38 AM
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Originally Posted by Bill Kapaun
Specifying WHICH hub would go a long way to giving you a correct answer.
Sorry but I have clarified this now. It was the rear, which is a freewheel hub.

Last edited by rodscot; 06-23-15 at 08:41 AM.
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Old 06-23-15, 08:42 AM
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Originally Posted by rodscot
Sorry but I have clarified this now. It was the rear, which is a freewheel hub.
Specifying WHICH BRAND/MODEL.........
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Old 06-23-15, 09:31 AM
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Originally Posted by Bill Kapaun
Specifying WHICH BRAND/MODEL.........
I am sorry. I misunderstood. It is an old bike and worth very little. My wife has had it for 25 years and I have no idea what the make is or the make of the wheel. However, I think that I got enough info to help me deal with the problem. Many thanks.
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Old 06-23-15, 10:26 AM
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Originally Posted by JonathanGennick
Just put back as many as will fit in the race. Don't cram in the last one, because there is usually almost enough space for one more but not quite enough, and you want that little bit of free space. Get the size right of course. Then just fill in the race.
^ Yes it is a pretty simple solution. Take one from the other side and see if it fits without "cramming in the last one." If it fits, you need 9... if not, you need 8. She has been riding it for 25 years. Easiest way to find the lost ball is to buy a replacement and it will pop up right after you attach the wheel to the frame.

John
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