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Technical & Reference Section => Tech and Restoration => Topic started by: hooga1975 on July 13, 2006, 02:08 PM

Title: How do I remove sealed bearings from a bottom bracket?
Post by: hooga1975 on July 13, 2006, 02:08 PM

As above.  I do not want to smash them out because I want to use them again, but I want to change my cranks.
Cheers
Lee

Title: Re: How do I remove sealed bearings from a bottom bracket?
Post by: oberonspacefruit on July 13, 2006, 02:10 PM

with a big screwdriver/punch. its easier than you think.

Title: Re: How do I remove sealed bearings from a bottom bracket?
Post by: Preston Pirate on July 13, 2006, 02:12 PM

You can use a bearing puller, it fixes inside the inner race from the outside and would rest aagains the frame, you then use a screw thread to pull be bearing out of it's seat.


You'll be able to hire one from HSS or the like...

The other way is to hammer them out with a drift, but you run the risk of knackering the bearings with the harsh impact.

Title: Re: How do I remove sealed bearings from a bottom bracket?
Post by: hooga1975 on July 13, 2006, 02:17 PM

nice one.  The bearings are now out and in one piece!

Title: Re: How do I remove sealed bearings from a bottom bracket?
Post by: Preston Pirate on July 13, 2006, 02:35 PM

 :daumenhoch:

Title: Re: How do I remove sealed bearings from a bottom bracket?
Post by: selfpreservation on July 13, 2006, 11:25 PM

so how did you do it

Title: Re: How do I remove sealed bearings from a bottom bracket?
Post by: hooga1975 on July 14, 2006, 03:12 PM

Quote from: selfpreservation on July 13, 2006, 11:25 PM

so how did you do it

I used the hammer and screw driver technique, and gave them a good old whack!

Title: Re: How do I remove sealed bearings from a bottom bracket?
Post by: FuNMoNsTeR on July 14, 2006, 06:04 PM

For future reference:
 You can cut out some rubber discs from some thick rubber sheet and place these inside the bb shell covering/protecting the bearing race/cup to be removed before you whack it ;)

Next weeks top tip:
 How to remove those pesky boxer stains when you have followed thru trying to remove rusty pedals.

Title: Re: How do I remove sealed bearings from a bottom bracket?
Post by: selfpreservation on July 14, 2006, 08:02 PM

Quote from: hooga75 on July 14, 2006, 03:12 PM

Quote from: selfpreservation on July 13, 2006, 11:25 PM

so how did you do it

I used the hammer and screw driver technique, and gave them a good old whack!

sorry for being blonde but what precisley did you do as i may be changing frames soon(fingers crossed)

Title: Re: How do I remove sealed bearings from a bottom bracket?
Post by: hooga1975 on July 14, 2006, 08:12 PM

I slid the one piece cranks through as far as I could.  I the poked a long thin screw drive into the gap in the bottom bracket and gently tapped round the bearing until it popped out.  It was easier than I thought it would be.