go to a fence supply store. they sell all sized rollers for gates that are
shaped to run on pipe rails.

Don

"Ed Ruf (REPLY to E-MAIL IN SIG!)" wrote in message
...
On 4 Jan 2006 16:12:31 -0800, in sci.engr.mech
wrote:

a pair of circular pipes exists, running in parallel.

I wish to use them as tracks for a small railcar.

where to buy wheels, whose "tread" surface is a semi-circle of the
right size to fit over the pipes? very low speeds in this cargo
application, friction-caused efficiencies should not be an issue.

Or must they be made up by a shop on a custom order?

Can you use a standard v-groove wheel instead or do you need the full
contact area between the two?

http://www.mcmaster.com/ctlg/DisplCt...MMainWidth=915
--
Ed Ruf Lifetime AMA# 344007 )
http://EdwardGRuf.com