I have a bearing pretty close to the inside, on my hub. It causes my other bearing to push out and into my cranks as I ride. Is there a way to move the bearing out safely? Can I apply some oil or something? Do I need a tool to do the job? Is my other bearing supposed to move like that anyway?
Has anyone ever used some kind of sleeve between the hub and the bearings to eliminate this problem completely. It could be a piece of tubing cut to the right length so that the bearings stay at the correct distance from the hub. It could be plastic or metal tubing.
I imagine that you'd want to put grease on the axle before sliding the sleeve on to eliminate any possibility of water collecting between the sleeve and axle to keep rust from forming.
john_childs wrote:> *That is the way that it is currently done on the square taper hubs. > There is either a slip on sleeve or a machined lip that acts as a> physical stop for the bearing when it's pressed on. But that only> stops the bearing from moving too far towards the hub. It doesn't> stop the bearing from moving towards the crank.>
Very few frames are stiff enough to hold a loose bearing in place, and> those that are stiff enough are overbuilt. You can't rely on the> frame to keep a loose bearing in place. *
So what you are saying is that the frame ends up flexing apart wider because of pressure from the bearing.
In my line of work, we use bearings that have a set screw to hold the bearing in place on the shaft. Is there a bearing manufactured that is the correct size for the uni, that also would have a setscrew to lock it onto the shaft? Has anyone ever looked into that?
John_childs 28 February 2005 10:28:52 [ permanent link ]
One on one wrote:> *So what you are saying is that the frame ends up flexing apart wider> because of pressure from the bearing.>
In my line of work, we use bearings that have a set screw to hold the> bearing in place on the shaft. Is there a bearing manufactured that is> the correct size for the uni, that also would have a setscrew to lock> it onto the shaft? Has anyone ever looked into that? *
Yup. The frame legs flex apart due to the slipping bearing. The bearing gets the outward force do to pedaling forces. There is more outward force on the bearing when climbing hard or pedaling hard.
I'm not familiar with the type of bearing you describe. I can't say whether that type of bearing would work or not.
The Loctite fix does solve the problem. Two of my unicycles have had a slipped bearing. The first was my stock Coker and the second was my DM freestyle uni. Loctite solved the problem and the slipping hasn't reoccurred.
Unfortunately, when you buy a new uni it's not going to come with the bearings Loctited on the hub. That's unfortunate.
