In this video I change some tractor wheel rims from 12 stud to 10 stud.
The old centre hole had to be cut out bigger to make room for the new bolt pattern using the gas torch and a simple home made circle cutter. After cutting out and cleaning up with the grinder, the new 10 stud pattern was drawn up in CAD and then cut out of 15mm plate on the cnc plasma.
The new centre was test fitted onto a spare axle in the yard.
The centres were then ground up making a clean surface to weld, the paint ground off by wheel rims, centres laid in and measured to make sure that they were in the middle then tack welded into position.
The brake drum was then test fitted to check for clearance before fully welding in on both sides.

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