Warren-

Thanks for the tip. I have already started the search, but see many discussions are about using them for decoration or "eyes" on a sculpture.

I also saw some ads for ceramic bearings, and now see I have more research to do.

Thanks again.

Besides the good resources mentioned above, there are other choices. You didn't say what size you are trying to deal with, or what your machining resources are. Car parts are a cheap source of spindles and bearings. Water pump bearings are useful, even with out the housing. Wheel spindle bearings are often useful and the lubrication can be adjusted for your climate.

I have worked with most bearings except for ceramic. So a little more information would help.

Don

I'll try to add a photo, but the maquette has a 3/8" stainless steel shaft, with bearings at the top and bottom of the "sail" which rotates with the wind like a weather vane. The full size version will have a 5/8" shaft, and depending on the bearings available, I'll have to figure out how to mount and enclose them. My "machining" capability is limited to my angle grinder.

Bob,

You can weld a piece of pipe over the end of the shaft and then fit a flanged collar bearing inside the pipe pretty easily. Check out the MSC catalogue for what is available and you'll get plenty of ideas, I'm sure. And don't overlook the fact that many larger hardware stores carry some standard bearings for 5/8" shaft as they are used for wheels on lawnmowers and the like.

I have seen and worked on kinetic sculpture with ceramic bearings. They did not hold up in an outdoor environment. Also, standard sealed bearings rusted. My research found stainless steel sealed bearings. Not knowing your application can make it difficult to offer good advice. What you mentioned made me think about weathervanes. They have a very simple bearing. A shaft with a point on the top. Best, Tom.

Stephen Fitz-Gerald

Skateboard bearings fit a 3/8ths shaft,and are sealed ,but aren't meant for vertical configurations. If the piece were light enough it might work. At least they'd be cheap and easy to replace.