Trolly for sliding bifold door.

[Frank S]

In building a back door for my shop I found the need for a trolly like would be used on an overhead crane. I have several ranging from a small half ton to a pair of massive 10 ton trolleys But everything I have was either too huge or smaller than I was comfortable for using to support the bifold door, that and all would have hung down far too low to use without major modifications.
Better to just make one designed for the purpose.
the side plates are made from 1 1/2" x6"x5/16" angle iron the wheels have 6206 ball bearings on 20mm stubshafts 3 1/8" roller dia. with a 4" dia flange made from 3/4" mild steel plate
It turned out so well I almost decided to use it as a trolley for with a 1ton chain hoist it is far stronger than the factory one hanging on 1noe of my jib cranes in the machine shop van