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Technical & Reference Section => Tech and Restoration => Topic started by: hooga1975 on December 18, 2006, 10:22 AM

Title: Whats is the best way of fitting a bottom bracket
Post by: hooga1975 on December 18, 2006, 10:22 AM

I dont want to damage the sealed bearings or cups.  I was thinking about putting them in a vice and gently squeeze them in.  The last set I fitted I banged them in with a hammer and a piece of wood, but I did put a few marks in the bearing cups.  Whats is the best way to do it without causing any damage?

Title: Re: Whats is the best way of fitting a bottom bracket
Post by: gmac on December 18, 2006, 10:23 AM

I use the vice method for sealed bearings. Just make sure yoiu have something soft accross the jaws, like a towel or something.

Title: Re: Whats is the best way of fitting a bottom bracket
Post by: Mattdub on December 18, 2006, 12:59 PM

I would also consider a local bike shop ( hopefully with a guy you know working there / competant (sp) mechanic ) for BB's & Headsets .

Title: Re: Whats is the best way of fitting a bottom bracket
Post by: andygti39 on December 18, 2006, 09:50 PM

best way is to make a pair of aluminium softjaws for the vice, so that when you tighten the vice the aluminium will squash first as its softer  :daumenhoch:

Title: Re: Whats is the best way of fitting a bottom bracket
Post by: theRuler on December 18, 2006, 09:51 PM

massive hammer in each hand

when i nod my head, hit it

Title: Re: Whats is the best way of fitting a bottom bracket
Post by: daz bmx it! on December 18, 2006, 09:54 PM

Ditto!  :2funny:

Title: Re: Whats is the best way of fitting a bottom bracket
Post by: selfpreservation on December 18, 2006, 10:08 PM

bike shop deffo

Title: Re: Whats is the best way of fitting a bottom bracket
Post by: Moose on December 18, 2006, 10:19 PM

Vice, soft-jaws, grease  :daumenhoch:

Title: Re: Whats is the best way of fitting a bottom bracket
Post by: THE TUF*NECK on December 18, 2006, 10:21 PM

heat the frame up with a blow totch put the bearings on a bed of dry ice for 1 hour put them in or is that a bit rough? big hammer wood also works

Title: Re: Whats is the best way of fitting a bottom bracket
Post by: MartyC on December 18, 2006, 10:21 PM

Pop the cups inthe freezer for a few hours and then two pieces of wood on either side of the vice jaws and you're away  :daumenhoch:

Title: Re: Whats is the best way of fitting a bottom bracket
Post by: OrgasmDonor on December 19, 2006, 02:25 PM

freeze cups n use a big fook off wooden mallet, and whack the bejesus out of them until somethin gives, i use this technique on all my builds, its fookin terrifyin but effective :daumenhoch:

Title: Re: Whats is the best way of fitting a bottom bracket
Post by: hooga1975 on December 19, 2006, 03:49 PM

I gave up on the vice as it didnt go wide enough.  Whilst rooting around in my old mans shed I found a fook off wooden hammer and smacked the feckers in with it.  Thanks for the tips though fellas :daumenhoch:

Title: Re: Whats is the best way of fitting a bottom bracket
Post by: login_user on December 19, 2006, 05:36 PM

I used a bit of 10mm threaded studing and 2 planed pieces of hard wood with 10mm holes in them and a couple of nuts and washers.Place a nut and washer on one end of the studing then put the studing through one piece of wood then the bearing cup,the frame,the other piece of wood and then the other nut and washer.Do both the nuts up so it pulls the bearing cup into the frame,then do the other side. Simple :D

Hope that makes sense. :daumenhoch:

Title: Re: Whats is the best way of fitting a bottom bracket
Post by: OrgasmDonor on December 19, 2006, 07:08 PM

Quote from: hooga75 on December 19, 2006, 03:49 PM

I gave up on the vice as it didnt go wide enough.  Whilst rooting around in my old mans shed I found a fook off wooden hammer and smacked the feckers in with it.  Thanks for the tips though fellas :daumenhoch:

Thats ma boy :daumenhoch: