Here’s some pics of a Caterpillar 18M Grader Axle we have in for a complete rebuild overhaul. The Axle is mounted to our Rottler CNC machine which we have programs written for each of these parts that we machine & rebuild on a regular basis. All the bores are first machined, or bored, perfectly round & straight. We then weld the bores with our York bore welding machine fixture & then re-machine, or bore the bores back to spec.