New BB-UN300 defective??
08-05-23, 11:41 AM
#1
Newbie
Thread Starter
New BB-UN300 defective??
Dear All,
I've just received a new Shimano BB-UN300. As I hold the cartridge housing and turn the axle, I feel soft, regular bumping. 6-7 bumps per turn of the axle regardless of the direction I turn the axle. Is this to be expected?
Best to all,
Recovering
I've just received a new Shimano BB-UN300. As I hold the cartridge housing and turn the axle, I feel soft, regular bumping. 6-7 bumps per turn of the axle regardless of the direction I turn the axle. Is this to be expected?
Best to all,
Recovering
08-05-23, 11:45 AM
#2
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a good BB will turn smoothly with no restriction and zero play.
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08-05-23, 03:18 PM
#3
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I suspect that your feeling dried or hardened grease. It's bumpy because the BB was stationary in storage, so lumps formed between the balls.
This is par for the course, especially for stuff that sat around a long time.
If you're worried, bolt something to the spindle and spin it a while to see if it resolves.
This is par for the course, especially for stuff that sat around a long time.
If you're worried, bolt something to the spindle and spin it a while to see if it resolves.
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An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
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FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
