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Headset install question

Old 01-19-08, 10:49 PM
  #1  
jberenyi
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Headset install question

Just installed a threaded Campy Record headset tonight. The cups went in fine using the proper tool. There is one small section (90 degrees on a 360 degree circle) on the bottom race that I can fit a .010 feeler gage between the cup and headtube face. Is this okay to leave alone or should I remove the cup and have the headtube faced.

Bottom line: Is there a tolerance for gap between the cup and headtube. Being an engineer, most things in this world have a tolerance but maybe we need zero here.

Last edited by jberenyi; 01-20-08 at 08:23 AM.
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Old 01-20-08, 07:47 AM
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Headsets are not designed to have a gap on any portion. You have either not properly installed it or your headtube needs to be faced.
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Old 01-20-08, 07:53 AM
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2 or 3 jager bombs and she'll face your head tube

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Old 01-20-08, 08:03 AM
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That's gross. Ebay should have removed the pic for sure.
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Old 01-20-08, 08:05 AM
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Originally Posted by 2372ighost View Post
Headsets are not designed to have a gap on any portion. You have either not properly installed it or your headtube needs to be faced.
So even a .010 gap in a 90 degree segment is bad? Wow. I didn't think this would be an issue with so much of the rest of the cup fully seated. Maybe Sheldon can shed some light on this topic.
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Old 01-20-08, 06:02 PM
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Originally Posted by jberenyi View Post
Just installed a threaded Campy Record headset tonight. The cups went in fine using the proper tool. There is one small section (90 degrees on a 360 degree circle) on the bottom race that I can fit a .010 feeler gage between the cup and headtube face. Is this okay to leave alone or should I remove the cup and have the headtube faced.

Bottom line: Is there a tolerance for gap between the cup and headtube. Being an engineer, most things in this world have a tolerance but maybe we need zero here.
If the race is square and doesn't wiggle, it's fine.

Sheldon "Perfect Is The Enemy Of Good Enough" Brown
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Old 01-20-08, 08:27 PM
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Originally Posted by Sheldon Brown View Post
If the race is square and doesn't wiggle, it's fine.

Sheldon "Perfect Is The Enemy Of Good Enough" Brown

Great, the perfect IS the enemy of the good, but "the race is square" is not a sloppy spec, amenable to "good enough!" It means to me "the alignment MUST be as right as available tools can make it."

On the several used frames where I've renewed the headset, I've only needed facing and reaming on one bike, based on not being able to get a good adjustment and smooth rotation. It was also a Stronglight, a bit less forgiving than a ball-based bearing.

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Old 01-20-08, 08:28 PM
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Originally Posted by jberenyi View Post
That's gross. Ebay should have removed the pic for sure.
I've seen her on Ebay a lot - I think she's the one whe rebuilds those bikes.
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Old 01-20-08, 08:31 PM
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Originally Posted by jberenyi View Post
That's gross. Ebay should have removed the pic for sure.
I dunno. Doesn't seem that gross to me.
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Old 01-20-08, 11:13 PM
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Originally Posted by Sheldon Brown View Post
If the race is square and doesn't wiggle, it's fine.

Sheldon "Perfect Is The Enemy Of Good Enough" Brown
Thanks Sheldon. We finished installing the fork and the bearings feel great...nice and silky smooth. Glad I didn't have to remove those gorgeous Record cups.
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