My davit of 2 x 2 hitch stock is mounted. About twelve feet base to top.
Ninety off that three feet long and a diagonal. Electric hoist goes on the
end of three foot horizontal top piece.

It is currently temporarily welded with 1/4" plate just holding it vertical
to the container. Mounted on a concrete rotator on bottom, and has a
masthead on top, negating the simple sliding of a square hole bearing like a
harrow bearing on from the end. I need to pass this vertical shaft through
some sort of bearing for a 360 swing, then weld a bracket over to the
container to secure it.

Any ideas about how to do this without taking it off, cutting it, putting
bearing on, welding it back together, and reinstalling it?

This davit is held off the side of the container about a foot, and is for
light lifting in and out of the pickup. I would like to have good rotation
on it on ball bearings. The best thing seems to be a harrow bearing with a
square center, just trying to find an alternative without taking the whole
heavy thing down.

But by the time I do all this fabbing, it would probably be less work just
taking it down and doing it the right way.

Steve

On May 9, 1:59*am, "Steve B" wrote:
...I need to pass this vertical shaft through
some sort of bearing for a 360 swing, then weld a bracket over to the
container to secure it....
Steve

When I need a custom bearing I scrounge up a piece of pipe for the
outer race, cut welding rod for rollers and turn the inner race to
fit. It's "sealed" by sheet metal washers and the excess grease that
oozes out.
https://picasaweb.google.com/KB1DAL/...44353392854802
The axles, minus the grease fittings on the ends that lead to the
cross holes and grooves:
https://picasaweb.google.com/KB1DAL/...44360314674306

In case you never rebuilt bicycles, you assemble loose bearings by
sticking the balls or rollers in a layer of grease.

jsw

On Sun, 8 May 2011 22:59:40 -0700, "Steve B"
wrote:

My davit of 2 x 2 hitch stock is mounted. About twelve feet base to top.
Ninety off that three feet long and a diagonal. Electric hoist goes on the
end of three foot horizontal top piece.

It is currently temporarily welded with 1/4" plate just holding it vertical
to the container. Mounted on a concrete rotator on bottom, and has a
masthead on top, negating the simple sliding of a square hole bearing like a
harrow bearing on from the end. I need to pass this vertical shaft through
some sort of bearing for a 360 swing, then weld a bracket over to the
container to secure it.

Any ideas about how to do this without taking it off, cutting it, putting
bearing on, welding it back together, and reinstalling it?

This davit is held off the side of the container about a foot, and is for
light lifting in and out of the pickup. I would like to have good rotation
on it on ball bearings. The best thing seems to be a harrow bearing with a
square center, just trying to find an alternative without taking the whole
heavy thing down.

But by the time I do all this fabbing, it would probably be less work just
taking it down and doing it the right way.

Steve


something like
http://www.hayley-group.co.uk/catalo...ller-bearings/

Steve B wrote:
My davit of 2 x 2 hitch stock is mounted. About twelve feet base to top.
Ninety off that three feet long and a diagonal. Electric hoist goes on the
end of three foot horizontal top piece.

It is currently temporarily welded with 1/4" plate just holding it vertical
to the container. Mounted on a concrete rotator on bottom, and has a
masthead on top, negating the simple sliding of a square hole bearing like a
harrow bearing on from the end. I need to pass this vertical shaft through
some sort of bearing for a 360 swing, then weld a bracket over to the
container to secure it.

Any ideas about how to do this without taking it off, cutting it, putting
bearing on, welding it back together, and reinstalling it?

This davit is held off the side of the container about a foot, and is for
light lifting in and out of the pickup. I would like to have good rotation
on it on ball bearings. The best thing seems to be a harrow bearing with a
square center, just trying to find an alternative without taking the whole
heavy thing down.

But by the time I do all this fabbing, it would probably be less work just
taking it down and doing it the right way.

Steve



How about taking a harrow bearing, use a thin kerf saw and split the
inner and outer race.
Clamp the inner in place so the cut is 90 deg. Out of plane with the
lift stresses. Tack it in place in a few spots.
Then install the outer race and rollers, The outer race could be held
together by a saddle like a main/rod bearing in an engine.. Place some
shims in the gap to allow free movement.

--
Steve W.