On Aug 21, 11:06*pm, "DoN. Nichols" wrote:
...
This is a 1 Ton HF trolley ...
I had to turn the trolley wheels down to fit into the channel.
...
* * * * Note that the wheels on the shown trolley are tapered to match
the angle of the flanges of the channel iron. *Something to bear in
mind when you make your own.
* * * * * * * * DoN.

The wheel taper didn't match the channel angle very well. Perhaps it
fits a larger beam better?

One 6203 bearing supports each wheel.
http://www.gizmology.net/bearings.htm

jsw