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Technical & Reference Section => Tech and Restoration => Topic started by: ATL on July 29, 2008, 11:37 AM

Title: Bottom bracket assembly bearing question? Dumb
Post by: ATL on July 29, 2008, 11:37 AM

What way do the bearing go in on the bottom bracket, as my bearing ring has a metal back so the bearings only protrude on one side, does the metal side face out, or face in toward the bottom bracket? Ie face inside the bike?

Sorry guys i should have taken pics as i took the bike apart as iv never done this before!

Title: Re: Bottom bracket assembly bearing question? Dumb
Post by: HEYWOOD BMX on July 29, 2008, 11:48 AM

 :) Is it an unsealed US BB? The bearings should go into the cups so that the balls actually protrude /rotate in the cups themselves.Don`t forget plenty of grease will help...


 

Title: Re: Bottom bracket assembly bearing question? Dumb
Post by: ATL on July 29, 2008, 11:53 AM

I believe its a US, yeah its unsealed. So they go facing inward with the rear of the metal cage on the outside? Against the nut you tighten up? Balls are protruded.....inward yeah got tons of grease it just sounded a bit gratey so i thought id ask.

Title: Re: Bottom bracket assembly bearing question? Dumb
Post by: Lazarou on July 29, 2008, 11:56 AM

Quote from: ATL on July 29, 2008, 11:53 AM

Balls are protruded

 :LolLolLolLol:

Title: Re: Bottom bracket assembly bearing question? Dumb
Post by: SaMAlex on July 29, 2008, 11:56 AM

Put the ball race on the bench or floor. Then get the inner race (the one that screws in on the crank spindle) and place it in/on the bearing. Try it with the bearings both ways up. It will only really work one way, the inner race will just sit on the metal if its upside down.

Title: Re: Bottom bracket assembly bearing question? Dumb
Post by: ATL on July 29, 2008, 01:02 PM

Cheers guys! :D