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