Bearing seal questions for new build
12-08-12, 11:36 PM
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Bearing seal questions for new build
OK so what your looking at is the headset of a current build that I am starting from a 18" Diamond back frame. Note: It will be going to paint here soon. Well I have the pressed fit cups in the frame (that's right, right?) however what I am missing is the very top and bottom seals that protect the bearings form the elements. The fork shaft is 1 1/8" and the bearing recess into the cups already fit to the frame. So my question is what part do I need for the bottom seal and what part do I need for the top seal? Looking on Amazon i see angles like 45/45 and 45/35 and have no idea what I am looking for here.
Below are some pics of my current every day rider and what I am looking at in comparison to the build I am looking at. Any help is greatly appreciated. Oh as most of your can see this is a cross country/mountain bike build.
12-08-12, 11:40 PM
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As for the seals, these are usually part of the headset, and the originals rarely (if ever) sold separately. Depending on the side of the gap and the shape of the headset you can sometimes improvise seals from O-rings, or a carefully trimmed sheet of rubber or plastic.
If all else fails, and the bike is intended for rough service, cut a ring about 1/2" wide from an inner tube, and stretch it over the lower cup letting it wrap under the crown to make a skirt. Done right this makes a very effective, though not beautiful weather seal.
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Last edited by FBinNY; 12-08-12 at 11:44 PM.
12-09-12, 12:32 AM
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Also is there a tool used to cut down stem form the front fork? Kind of like a pipe cutter for 1 1/8th" tubing? Does anyone have a link or could let me use one for a minute. I will pay for shipping.
12-09-12, 12:39 AM
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Wouldn't it make more sense to paint it before pressing in the headset and building it up?
As for the seals, these are usually part of the headset, and the originals rarely (if ever) sold separately. Depending on the side of the gap and the shape of the headset you can sometimes improvise seals from O-rings, or a carefully trimmed sheet of rubber or plastic.
If all else fails, and the bike is intended for rough service, cut a ring about 1/2" wide from an inner tube, and stretch it over the lower cup letting it wrap under the crown to make a skirt. Done right this makes a very effective, though not beautiful weather seal.
As for the seals, these are usually part of the headset, and the originals rarely (if ever) sold separately. Depending on the side of the gap and the shape of the headset you can sometimes improvise seals from O-rings, or a carefully trimmed sheet of rubber or plastic.
If all else fails, and the bike is intended for rough service, cut a ring about 1/2" wide from an inner tube, and stretch it over the lower cup letting it wrap under the crown to make a skirt. Done right this makes a very effective, though not beautiful weather seal.
I will not add anymore parts to the build until I paint but i know there will be a gap in time between now and when i get the necessary parts. The original parts are for a threaded fork shaft. So it won't work with this new fork. I cannot get the bottom seal off the old bike fork shaft, is there a way to do this?
12-09-12, 04:25 AM
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12-09-12, 05:43 AM
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Good to go, care to point me in the right direction? What parts do I need?
Something like this: https://www.amazon.com/Origin8-Pro-Th...cycle+headsets
If so how do I press them into the frame and or remove the old ones?
Something like this: https://www.amazon.com/Origin8-Pro-Th...cycle+headsets
If so how do I press them into the frame and or remove the old ones?
Last edited by paramil; 12-09-12 at 05:47 AM.
12-09-12, 09:07 AM
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Good to go, care to point me in the right direction? What parts do I need?
Something like this: https://www.amazon.com/Origin8-Pro-Th...cycle+headsets
If so how do I press them into the frame and or remove the old ones?
Something like this: https://www.amazon.com/Origin8-Pro-Th...cycle+headsets
If so how do I press them into the frame and or remove the old ones?
First go to the Park Tools' web site and review the tutorials on headset installation and the various types. As noted, if you are going from a threaded fork to a threadless one, you need a completely new and different type of headset.
Yes, there are cutting guides that let you cut a steerer to the proper (and be SURE you know what proper is) length but they are a bit expensive for a one time use. A fine tooth hacksaw guided by a hose clamp around the steerer is a good way to do it.
Also there are specific removal and installation tools for headset cups and the crown race but, again, it is possible to fashion homemade, low cost tools to accomplish the same things. That said, headset removal and installation are often left to a bike shop even by otherwise experienced home mechanics.
12-09-12, 10:42 AM
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the headset you have never had any seals , If original parts,
it was a chosen for lowest cost part, to keep the selling price lower.
there are other headsets that will offer cartridge sealed bearings..
I too suggest dropping by the Bike shop, .. 'show and tell' works so much better in person.
Also, they can help you sort out the way you fit on the bike better, being able to see you, there.
the 'measure thrice, cut once' .. really applies to fork steerers.
it was a chosen for lowest cost part, to keep the selling price lower.
there are other headsets that will offer cartridge sealed bearings..
I too suggest dropping by the Bike shop, .. 'show and tell' works so much better in person.
Also, they can help you sort out the way you fit on the bike better, being able to see you, there.
the 'measure thrice, cut once' .. really applies to fork steerers.
Last edited by fietsbob; 12-09-12 at 10:50 AM.
12-09-12, 10:53 AM
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Actually, I'm a firm believer in measure thrice and cut twice. Make the first cut too long and add spacers above the stem until you have ridden it enough to be really sure where you want the bars. Then, after you are certain, make the second cut.
12-09-12, 12:17 PM
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paramill, Have a bike shop remove the old headset before painting, then after the frame is painted have them face the head tube and bottom bracket, chase the bottom bracket and install the new headset. The price should be nominal and not much more than making your own set of home made tools for a one off job.
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12-09-12, 12:26 PM
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paramill, Have a bike shop remove the old headset before painting, then after the frame is painted have them face the head tube and bottom bracket, chase the bottom bracket and install the new headset. The price should be nominal and not much more than making your own set of home made tools for a one off job.
Brad
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12-09-12, 12:41 PM
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Finish by cleaning up and deburring the cut with a file. A half round medium file is nice for the job, but not necessary. You can also use emery cloth and your fingertips.
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WARNING, I'm from New York. Thin skinned people should maintain safe distance.
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An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
12-09-12, 03:55 PM
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Check, well I am afraid that its not that simple either. I am currently contracted in Asia. I have gone to the local bike shop a few times and their capabilities are horrible. I will put out a feeler on FB and see if anyone here has any experience in this field. Thanks.
12-09-12, 04:06 PM
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An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
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An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
Last edited by FBinNY; 12-09-12 at 04:12 PM.
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