421-22-12790 bearings are used in the Loader Gearbox Bearing system of komatsu heavy machinery equipment：
421-22-12790 BEARING KOMATSU parts 542, 545, HM350, HM400, WA420, WA470
06032-01021bearings are used in the Cylindrical Roller Gearbox Bearing system of KOMATSU heavy machinery equipment：
06032-01021 BEARING KOMATSU parts D155A, D155S, D155W, D355A, D355C, D455A, HD320, WS23S
7J-3297 bearings are used in the Bulldozer Self-calibrating spherical bearing of Caterpillar heavy machinery equipment：
Caterpillar ：TRACK-TYPE TRACTOR D8R D8R II D8T D9R D9T
39Q6-42120 bearings are used in the final drive Bearing system of HYUNDAI heavy machinery equipment：
39Q6-42120 HYUNDAI BEARING parts
Apply to R250LC9, R250LC9A, R260LC9S, RB220LC9S, RB260LC9S, RD210-7, RD210-7V, RD220-7, RD220LC9
