Which way up do the cage bearings go in?

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Which way up do the cage bearings go in?

Postby blokeinamoke » Tue Feb 16, 2010 2:59 pm

Just pulled an old steel frame bike apart to paint... noob me... forgets which way the bearings for the forks/headset go back in?

Any help is much appreciated,

Ta,
Matt
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by BNA » Tue Feb 16, 2010 3:17 pm

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Re: Which way up do the cage bearings go in?

Postby familyguy » Tue Feb 16, 2010 3:17 pm

It shouldnt really matter, cause they'll roll on both surfaces anyway IIRC. Trial and error, you'll soon tell if its not rolling. Try cage DOWN in lower race, cage UP in top race (if you get my drift - the cage has a flat face).

Jim
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Re: Which way up do the cage bearings go in?

Postby LG » Tue Feb 16, 2010 4:08 pm

For a headset you have a cup & cone above the head tube and a cup & cone below at the fork crown. The part of the caged bearing which has the extenal component of the bearing balls free goes into the cups. The solid part of the bearing retainer should point towards the cones. Not sure of a better way of describing this, and I've probably just confused myself. :roll: See how you go.
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Re: Which way up do the cage bearings go in?

Postby il padrone » Tue Feb 16, 2010 5:50 pm

If you want to be really authentic use loose balls :wink: . Ball-bearings in retainers were really brought in during the 60s-70s I believe, to speed up mass-production methods. Back in the 80s we would always use loose balls in preference - more balls to spread the load and they move freeer to possibly reduce the chances of brinelling to the headset cups. You also only want to experience the failure of a caged bearing headset once to convince yourself not to use them :(
Riding bikes in traffic - what seems dangerous is usually safe; what seems safe is often more dangerous.
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Re: Which way up do the cage bearings go in?

Postby saintdarth » Tue Feb 16, 2010 8:41 pm

il padrone wrote: Back in the 80s we would always use loose balls in preference - more balls to spread the load :(


always good to have loose balls!


So what size balls do you use?
I am guessing same size to those in the cage bearing

how many?
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Re: Which way up do the cage bearings go in?

Postby blokeinamoke » Wed Feb 17, 2010 11:38 pm

saintdarth wrote:
il padrone wrote: Back in the 80s we would always use loose balls in preference - more balls to spread the load :(


always good to have loose balls!


So what size balls do you use?
I am guessing same size to those in the cage bearing

how many?


+1 please!
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Re: Which way up do the cage bearings go in?

Postby fixie » Thu Feb 18, 2010 5:49 pm

Varies with the particular headset, but to be helpful: Very old 1/8 inch, Most normal, 5/32 inch, some highclass 1/4 inch. Note even in a metric age balls are Imperial.

You will know usually if you put in the wrong size because the headset will not assemble correctly.
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