h2o_polo_boi
12-29-06, 01:49 PM
getting ready to install my Christ King No Thread headset and just wondering weather I should grease the cups before I press them in. Also, wanted to know if I should grease the crown race. Thanks.
Bicycle Mechanics - to grease or not?
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The Great Stonk
12-29-06, 01:58 PM
yes and yes.
sivat
12-29-06, 02:19 PM
I put a little grease on everything. Keeps it from seizing and rusting, and will make it easier to take apart if you ever need to.
Rowan
12-29-06, 02:23 PM
Are there instructions? Personally, any item (headset cups, sealed bearings) that has to be pressed in and relies on a friction fit to remain in place... I would not apply grease. I would, however, use Loctite 242/243 if the friction fit is slightly looser than it should be.
HillRider
12-29-06, 02:45 PM
Are there instructions? Personally, any item (headset cups, sealed bearings) that has to be pressed in and relies on a friction fit to remain in place... I would not apply grease. I would, however, use Loctite 242/243 if the friction fit is slightly looser than it should be.
Headset cups and crown races don't rely on friction to hold them in place, they are retained by being "sandwiched" between the fork crown and the stem (threadless) or top race (threaded). There is no way they could fall out, no matter how loosely they fit, unless the fork steerer broke. Loosly fitted cups or crown races will eventually wear and damage the headtube or fork steerer but they don't rely on friction to prevent that either.
The many headset I've seen installed by a number of mechanics had grease applied to the cups and the fork's crown race seat before installation. I've done the same on all of my headset installations too. Nothing has ever shifted or fallen out as a result.
Headset cups and crown races don't rely on friction to hold them in place, they are retained by being "sandwiched" between the fork crown and the stem (threadless) or top race (threaded). There is no way they could fall out, no matter how loosely they fit, unless the fork steerer broke. Loosly fitted cups or crown races will eventually wear and damage the headtube or fork steerer but they don't rely on friction to prevent that either.
The many headset I've seen installed by a number of mechanics had grease applied to the cups and the fork's crown race seat before installation. I've done the same on all of my headset installations too. Nothing has ever shifted or fallen out as a result.
h2o_polo_boi
12-29-06, 03:53 PM
+1 with HillRider
in regards to usiing loc-tite, Chris King says "We do not recommend using Loc-Tite and/or similar products to make up for a loose fit as the load forces tend to exceed their holding power causing them to disintegrate and allow movement. While they may seem to work at first, they will usually fail in less than a year."
I already used a smear of grease and just installed my first headset smoothly :beer:
in regards to usiing loc-tite, Chris King says "We do not recommend using Loc-Tite and/or similar products to make up for a loose fit as the load forces tend to exceed their holding power causing them to disintegrate and allow movement. While they may seem to work at first, they will usually fail in less than a year."
I already used a smear of grease and just installed my first headset smoothly :beer: