What kind of bearing do I need??

[85blue4runner]

doing some R&D work for a future project and need to come up with a bearing (or some other pivot point) that acts like a wheel on a spindle. The difference here will be that there could be a pretty good amount of force (500 - 1000 pounds) in a side to side rocking motion. Basically if you put your hands at either side of your tire and pushed and pulled like you were trying to get the wheel off the studs.

The load is pushing on one side, and pulling on the other and the same thing could happen top and bottom. I would like to have a pretty big safety margin and the pivot device can be pretty large (5-6") if needed. Almost like a lazy susan turned up on its edge.. the device only needs to be able to rotate 180 degrees, maybe slightly less and at very slow rates.. this bearing will basically be the union/connection between two items. I would like for it to be sealed if possible, if not, easily serviceable.

thanks

[300sniper]

my first thought is using a car or truck spindle/bearing set up. will that not work?

[85blue4runner]

that may work fine, just have no idea what kind of loads that would take in the directions that i mentioned. Guess that would be a function of the wheel bearing spec?? Maybe a unit bearing off an f-450 size truck??

[rockcrawln]

What about just putting a flanged bronze bearing in it? They can take that kind of load and since you say slow speeds and only 180 degrees that would probably work. What kind of radial load are you looking at having? Are the 500-1000# loads static or dynamic?

[stainless steal dave]

i would use a tapered roller bearing for your project-actually a pair of them mounted back to back-the thick part of the race faces the thick part of the other bearing race. threaded adjustment nut for preloading the bearings as needed. this is the arrangement used on wheel bearings b.t.w. good luck with your project.

[Toddy]

Get a trailer spindle and hub. Look at how much force is allpied to those on a duel axle trailer when turning. On my goose neck it looks like the tires a about to pop off bead when the trailer is loaded and making a tight turn. I am sure it is exciding your 500 to 1000# requirement.

Toddy

[85blue4runner]

thanks guys, was hoping that I could use some sort of wheel bearing and spindle type setup... the load will be dynamic and radial loads and axial loads should be about the same.

[Travis Waldher]

500-1000lbs?

Hell, almost any car's wheel bearings/spindle would work.

[85blue4runner]

maybe I am off on the numbers or the type of load then...

a wheel bearing on a spindle takes most loads inline with the plane of the wheel and tire (radial). An axial load is through the center line of the bearing (i think) but with the wheel bolted to the WMS, axial loads should be very small. So will that spindle and bearing take a large deflecting or prying load??

Lets say the tip of a prybar is the bearing and you are pushing like crazy on the other end of a long pry bar, bouncing, etc.?? What kind of load is that on a tapered roller bearing?? Will it handle a few thousand pounds of that??

thanks

[krugford]

Think about the cornering forces on a car.... that's axial loading right there

[rockcrawln]

Think about the cornering forces on a car.... that's axial loading right there

Or when you clip a curb at 20 mph. :D

[MrShoeBoy]

Can you explain what the project is or will you have to kill us if you say anything :flipoff2: Sounds interesting :D

The wheel bearings off a 14b full floater are pretty big and I bet they can take the side load that you are talking about.

AARON

[rusty_scout]

AMC cars used a spindle that unbolted from the knuckle.
You would have a 4 bolt spindle with the hub and bearings to work with.