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Technical & Reference Section => Tech and Restoration => Topic started by: Clean on March 28, 2011, 07:26 PM

Title: Please help: Bearing Race Orientation?
Post by: Clean on March 28, 2011, 07:26 PM

Guys,

Another NoOb question as a progress through my first build....

I have read contradictory views on the tinterweb regarding bearing race orientation.

For Bottom Brackets everything points to the exposed side of the bearing race (more of the ball visible) faces inwards so the bearings run against the curved race seated in the BB. Read this:

http://www.atomiczombie.com/ct-bb1pce.html (http://www.atomiczombie.com/ct-bb1pce.html)

From what I can find regarding Headsets, it is the reverse, with advice to place races facing outwards so that the bearings run against the cone shaped insert and not the cup fitted into the bike headtube! Read this:

http://www.parktool.com/blog/repair-help/threaded-headset-service (http://www.parktool.com/blog/repair-help/threaded-headset-service)

Please can anyone clarify the orientation for BOTH sets of Races?

Many thanks in advance,

Clean.

Title: Re: Please help: Bearing Race Orientation?
Post by: oldtired on March 28, 2011, 07:36 PM

bb solid side out as per link    headset solid side facing cups ,some headsets are opposite on top race Tange ones i think'they have a seat that goes in the top of the frame rather than a cup  but the race still fits the same way in the cups?   will bung up some pics in a mo

 what headset is it you got? 
pics
headset left bb right, standard parts

(http://www.radbmx.co.uk/archive/albums/ff98/jimjdld/bmx/cups.jpg)

Title: Re: Please help: Bearing Race Orientation?
Post by: Clean on March 28, 2011, 09:26 PM

Cheers, fella!

Cracked it. Build complete; just polishing her up for some pics!

 :4_17_5: