The following details the mining grader population for machines covered by Parker Bay’s Database. This includes all large motor graders with net power ratings of 200kW (275 hp) or greater and some down to 160 kW. The active population is 3,300 motor graders with a further 1,200 now out of service. The two primary manufacturers of these large graders are Caterpillar and Komatsu, whose models are listed below.