I added another thrust bearings back to back to cut the RPM and
greatly increase the life. The thrust bearing that can be used
is 3.75 ID 4.625 OD. Limiting RPM is 3500 RPM and max thrust
capacity is way overkill at 11,000 pounds. These numbers
must be
adjusted for life factors and actual RPM used.

Looks good Paul. For the 4" needles drawn cup or ground race? 

Right now I have located just caged four inch ID. No outer race.
We might have to make an outer race. As far as I know drawn cup
are not available in four inch ID.

The double thrust would be the best low-cost way to go. I think you might need to furnace braze the pins on to prevent distortion, followed by cnc grind to hold the centers. I have an input on the pins/lugs for eaiser production. Loses a little on weight but is much eaiser to keep straight. I'll send in a separate post.

I have a line on some cnc equipment if it isn't sold already. How busy do you think some of these things could keep a business if there was the inclination? I am working a deal with some composite buddies for doing tooling and production. Could be an interesting side business. Bill Jepson

This is  a growing biz. If it keeps going like it has in the past few years.

Paul Lamar

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