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Journal brg/pin design for Draw Bar mech

Journal brg/pin design for Draw Bar mech

Journal brg/pin design for Draw Bar mech

(OP)
Recommendations for journal bearing & pin design: mat'l, pin surface finish & hardness, design contact pressure, lubrication.  The draw bar linkage mechanism has very high loads >500,000 lbs and moves very slowly so that velocity and angular travel <30deg between the pins and bushings is very small.  Typical practice is to limit the contact pressure=load/(brg dia x brg length) to some limit.  Is 4,000-6,000 psi a reasonable limit to minimize wear of either the bushing or the pin?  Does anyone have experience with graphite plugged brgs?  Recommendation for a type of lubricant or surface finish for this nearly static condition.  Thanks

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