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That is great to hear about the rpm's. I was really concerned about the oil foaming or the pinion bearings becoming hot. I was looking at using composite bearings costing 3-4 times as much as the only alternative to keeping the top of the chuck alive. By using normal bearings I can save a great...

Bringing this back up to the top to ask about your pinion bearing. I am looking at running a set of 5 tons in a expectation rig that will see stretches of highway at mostly 70. Now before everyone goes off no that this thing will weigh right around 6200 with 3440 of that being axles, brackets...