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Old 07-08-08, 11:46 PM   #1
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BB Accordian shield necessary?

I'm putting together an old style cup and spindle BB. The bearings are nice cartridge type, which is nice for keeping the bearings from falling all over when you service it. However, is it necessary to have a spindle shield? It never had one, but my other old bike did. Logic tells me, it is a benny to keep water and crud out of the shell.
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Old 07-08-08, 11:53 PM   #2
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Generally, cartridge refers to a sealed unit as far as I know. I think the name for what you are referring to is a "retainer." In any event, you pretty much answered your own question there: it's essentially an optional piece, but it does serve it's purpose. If you don't have one, and don't feel like going down to the shop to pick one up (depending on your standing with the shop, they might even just give you one), I'm sure the world won't end.

Personally, I use them, but I've never built up an old BB that didn't already have one.
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Old 07-09-08, 01:26 AM   #3
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I'm sorry.

It's called a carriage.

(not a cartridge)

Some people say retainer as well.

Inner race, outer race, carriage, balls, and seals.
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Old 07-09-08, 07:25 AM   #4
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Use the shield if you have or can get one. Pack a bead of grease around both ends to form a better seal.
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