On Sat, 21 Aug 2010 11:04:42 -0700 (PDT), Jim Wilkins
wrote:

On Aug 21, 1:38*pm, Sunworshipper wrote:
I've been forgetting to ask if there are any great ways to design a
I-beam trolley for a winch. Awhile back we unloaded a machine and the
chain slipped around a cast part and jarred the whole crane
contraption I have in the shop. The light weight electric hoist
trolley that wasn't in use jumped up and pivoted right off and came
slamming down.

Anyhow, now I don't trust this thing and have to make one myself.
Pictures would probably be enough to go on. *I just come up with
bearings on bolts or I could make pins, but unsure if I should mill up
some sides and then weld up a channel and then weld the pins in place
or what. *Four wheels, or 6, and should they be slightly angled to
match the tapered beam? The end of the beam doesn't have access.

Maybe I'm just hung up on the idea of being able to take it apart. Is
that really necessary? Hmmm I guess it would be a bitch cutting the
thing off if (?) I destroy it.

SW

This is a 1 Ton HF trolley on rails made of 3" channel iron:
http://picasaweb.google.com/KB1DAL/F...88504883032706

I had to turn the trolley wheels down to fit into the channel.
http://www.harborfreight.com/1-ton-p...ley-97392.html
The text is wrong, there are no gears and the bearings on mine weren't
sealed.
It disassembles easily by removing the nuts on the large shaft.

Three inch channel is marginal or inadequate for a ton but I don't
think I've lifted half that with it yet.

jsw

Maybe two large bolts with large dia. bushings to hold it together.
I'll have to think about that, but that is what I'm looking for in
ideas. The beam is 6" tall X 4"

Thanks

Oh, where are you? I was looking at your bike saw mill, interesting.
I've only seen one in action, round tires and the blade doesn't come
off? The uncle inlaw is making a large one, someday I need to find
some trees and make some cool furniture.

SW