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difficulty banging sealed crank bearings into cups

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Gary72:
I'd leave the cups in but dont forget to put the spacer in before the 2nd bearing ::)

firebird4130:
yeah I'm glad you said that , as I was beggining to convince myself that I didn't need it! I've always had this with doing bikes I'm like a perfectionist with setting them up, but have to go through several catastrophic errors before getting to the end result, I should know as I've even fitted cranks recently but it's just gone from my head! Every time is like the first  :LolLolLolLol:

sonic-1:

--- Quote from: fraz4130  Every time is like the first  :LolLolLolLol:
[/quote ---ooooo that sounds like so much fun  :LolLolLolLol: :LolLolLolLol: :LolLolLolLol:
--- End quote ---

pickle:
i'll tempt fate but say i've never had trouble fitting bearings in a BB, my fly spanish ones just needed tapping in....and the ones on my Sugino CT just pressed in with my fingers  :-\

with regards the spacer, i just put one side in, then put the spindle through with the spacer on, then push the other bearing onto the spindle and push it in  :daumenhoch:

perry:
so youve put the alloy cups into the frame without bearings in them ?

knock em out and push the bearings into the cups . the bearings are the only part thats guaranteed to be made properly

they WILL fit into the alloy cups , its putting the cups/bearings into the frame where the problem is as no one ever decided what size it shoud be  ;D

ive had cups that were 2mm bigger than the shell  ::)

get a digital vernier caliper ( few quid these days ) and see what the tolerance is , but i can see you having to sand the cups to fit

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