mid bb install problem
#1
Lost in the Black Hills
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mid bb install problem
hello everyone, i was pressing my bearings into my bb shell and it seems like the spacer that goes between the two bearings is too long?? the two bearings will stick out on each side 3-4 mm probably and they will not be seated against the machined stops of the bb shell.
is all this normal? it doesn't seem right. do i need to cut the spacer? and that's messed up because it is not going to be easy to cut the thing square AND the precise length it needs to be to allow bearings to be seated in shell and supported by spacer.
is all this normal? it doesn't seem right. do i need to cut the spacer? and that's messed up because it is not going to be easy to cut the thing square AND the precise length it needs to be to allow bearings to be seated in shell and supported by spacer.
![Frown](https://www.bikeforums.net/images/smilies/frown.gif)
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#3
Lost in the Black Hills
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Originally Posted by eightdip
What bb is it? The primo one is meant to stick out
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#4
Dig.
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You don't have to use the inner spacer, just don't make sure when you are tightening them they are tight, but not so tight that they feel unsmooth or don't move with a push or whatever...
And i'm sure a local bike shop will have the inner spacer if you want it...
And i'm sure a local bike shop will have the inner spacer if you want it...
#5
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Originally Posted by KinetikBiker
You don't have to use the inner spacer, just don't make sure when you are tightening them they are tight, but not so tight that they feel unsmooth or don't move with a push or whatever...
And i'm sure a local bike shop will have the inner spacer if you want it...
And i'm sure a local bike shop will have the inner spacer if you want it...
well i don't know about not using the spacer. it wouldn't be proper if there is a lot of clamping force with the cranks. i am using wombolts. is there a lot of force with these? i also don't think it would be correct to not snug the wombolt down as directed. if you leave it slightly loose to accommodate the lack of spacer you will most likely damage the crank interface.
i swear, nothing can ever go smooth. i thought these mid bb kits were universal. now its like i need to cut a spacer to length. i did call standard today and they said i need a 46mm. i am going to ACE to investigate the use of PVC pipe. this will be far easier than metal for me to get square and precisely 46mm.
no local shops, all mail order.
please, any other comments, or follow-up comments to the above?
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#6
Dig.
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Originally Posted by mx_599
i swear, nothing can ever go smooth. i thought these mid bb kits were universal. now its like i need to cut a spacer to length. i did call standard today and they said i need a 46mm. i am going to ACE to investigate the use of PVC pipe. this will be far easier than metal for me to get square and precisely 46mm.
no local shops, all mail order.
please, any other comments, or follow-up comments to the above?
no local shops, all mail order.
please, any other comments, or follow-up comments to the above?
The reason why the spacer is too long is because you probly got it from an american bb where the cups would make more space inbetween the bearings, leaving more room for a longer spacer...
And i'm sure if you called the mailorder you like they can send you a proper spacer if you specify the bb, frame and crank combo.
#7
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YOU DO NEED THAT SPACER... it keeps the bearings from binding, and exploding faster....
****...
you might want to find a smaller one, or trim yours NEATLY...
but dont run them without it for too long.
****...
you might want to find a smaller one, or trim yours NEATLY...
but dont run them without it for too long.
#8
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Originally Posted by sbcdestroy
YOU DO NEED THAT SPACER... it keeps the bearings from binding, and exploding faster....
****...
you might want to find a smaller one, or trim yours NEATLY...
but dont run them without it for too long.
****...
you might want to find a smaller one, or trim yours NEATLY...
but dont run them without it for too long.
#9
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update:
not to worry guys, used a pvc pipe for for a perfect 46mm fit. in the process, i managed to save some weight on my build.
not to worry guys, used a pvc pipe for for a perfect 46mm fit. in the process, i managed to save some weight on my build.
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#10
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Nice Mcgyvering!
I'm all about DIY! Please let us know about the longevity of your homemade spacer!
![Big Grin](https://www.bikeforums.net/images/smilies/biggrin.gif)
#11
Dig.
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Originally Posted by Quick_Torch C5
Nice Mcgyvering!
I'm all about DIY! Please let us know about the longevity of your homemade spacer!
![Big Grin](https://www.bikeforums.net/images/smilies/biggrin.gif)