168-8451 bearings are used in the final drive gearbox system of Caterpillar heavy machinery equipment：311C, 315C, 315D L, 318B, 318C, 318D L, 319C, 319D, 319D L, 319D LN, 320B, 320C, 320C FM, 320C L, 320D, 320D FM, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 321B, 321C, 321D LCR, 322B, 322B LN, 323D

333-3042 bearings are used in the excavator slewing gearbox system of Caterpillar heavy machinery equipment： E315D L, E316E L, E318D L, E318D2 L

2K-5066 bearings are used in the Loader Gearbox Bearing system of Caterpillar heavy machinery equipment： Caterpillar 936 950 950B/950E 966C 966D G936

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