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Its fine, the OD can range from .002 to .007 without any difference in pumping performance. They do get loud if the OD clearence gets too big, but it doesn't hurt anything. The gear basically sets its own clearance when under torque. It will crush that clearance down to bearing load size and...

.001 for width clearance. The distance between the housing top of the pocket and the top of the gear when placed in the pocket. The outer diameter to the housing is usually called the body clearance. We don't make them that tight because people find it hard to make them fit, and I've seen split...

Yeah, that's what the standard product runs. We keep all mill spec on our product for the last 20 years, along with all clearances for each pump and gear set since it's 100% inspect. All we need is the serial number to verify. Martenwear gears use a progressive heat treat that surface hardens...