I have a friend whose son is a machinist.
He bought an old 8N Ford and rebuilt it,
I remember my friend telling me how he rebuilt the front axle bushing, bearings and pin. He installed a grease zerk in the axle casting and cut grease groves in the pin so the grease could travel back and forth completely lubing the axle pin. He probably spent 10+ hrs of machinist labor reworking that old axle bearing. Tractor will be long gone, but that axle bearing will be like new.