"Larry Jaques" wrote in message
news
On Sat, 4 Aug 2018 11:40:02 -0400, "Jim Wilkins"
wrote:

"Leon Fisk" wrote in message
news
On Fri, 03 Aug 2018 18:15:27 -0700
Larry Jaques wrote:

snip
I wonder if Iggy's going to build one (with his son, of course)
for
use in-house, complete with remote control.

I suspect Iggy has time issues nowadays for stuff like that. Like
lack
of...

http://www.spydercrane.com/

Kickass idea! I'll bet they're doing extremely well with sales.
$70k for the URW295

Thanks for the price look-up. I was curious but didn't dare look.
I
knew it would be sobering...

--
Leon Fisk
Grand Rapids MI


I modified my 1 ton engine hoist into a miniature version of that by
adding larger wheels and a trailer coupler. Controlled tests show
that
it isn't stable enough to hoist and especially move with much more
than I can dead-lift, but it lifts quite a bit higher and I'm back
out
of the way. Bolt-on outrigger beams would help its stability..

Yabbut, you're supposed to make it spideylike!

Only if you want to sell it. The stuff I build for my own use
is -simple-. When components exceed the capacity of my machine tools I
revert to much slower manual layout and fabrication methods, and may
not bother to build something in steel that I won't need much and
could lash together with rope and timbers.

It's an excellent self-loading trailer that can straddle the load
and
then transport it on planks.

Having trouble here picturing that, but the effect sounds cool. I
like the mods which add a wheel at the end of the hoist and weld
brackets and a boat winch to the back of the boom. Much better
control during raising/lowering than the standard hydraulics give.

I made a boat winch attachment for the smaller crane on my pickup, and
used it quite a bit to pull logs out of a heap and lift them into the
bed. The winch mount and the boom end pulley pin to the existing
holes.

The cable can nearly double the stress on the boom, and bend the
adjustment pins.

For a larger hoist like the 1 ton shop crane I like to use a hanging
chainfall instead, so I can move around to align the load as it lands,
instead of having to be back at the winch.
-jsw