Bearing

[Vulnavia]

What is the proper bearing # / size / make for a 50mm axle?

[Jnovak]

What is the proper bearing # / size / make for a 50mm axle?

We use this bearing: 6910-2RS. This is a double seal bearing that is 50mm id x 72mm od x 12 mm width. We use 2 for each bearing carrier. We have never had a bearing failure of any kind. Remember that these bearings should be preloaded together and must have a shoulder of some type to take the side load if they are also used for the lateral location of the axle.

Shop around as the prices are all over the map. Here is where we get ours.

http://www.vxb.com/ballbearings.html...FckWMgod_mcAQA

Thanks ... Jay Novak

[Vulnavia]

Thanks Jay,

Why two bearings and can you simplify what "preload" is. I read a few things about it but am, as usual confused.

Thanks again,

[Jnovak]

Thanks Jay,

Why two bearings and can you simplify what "preload" is. I read a few things about it but am, as usual confused.

Thanks again,

If your lateral load is controlled by a link that is attached to the bearing carriers, like a Watts link or any other lateral location method, then 1 bearing will not handle the load period, guaranteed.

It is possible to use a single bearing on 1 side if all the lateral load is taken up on the side with 2 bearing.

Another option is to use an axle tube with a bearing on each side of the tube and where the axle tube carries the lateral load. This presents design/package problems with the sprocket hub.

There are many other issues. I strongly suggest that you use 2 bearings/side.

Preload: the bearings must be clamped to the axle structure in some way to keep them from moving and or rotating on the axle. This means that the axle must have a "shoulder or a spacer" to load the bearing against a shoulder and another method to load the inner race of the bearings against that shoulder.

Live axles normally are stepped with a shoulder that that controls bearing location and some sort of nut to load the bearing against the shoulder. This can be done but is expensive to implement. Most F500 axles use aluminum spacers that control the bearing location.

Thanks ... Jay Novak

[Vulnavia]

Two bearings it is.

Thanks Jay