... .ABEC-1,ABEC-3 4.Wide range Angular Contact lfr track roller bearing 1. Quality level: reach the same level as the Japanese ... precision grade: Series 78C, 79C, 70C, 72C, 73C- Double row type without filling slots: Series 52, 53 With filling slots: Series ... , construction equipment, pumps and printing presses Packing:Work house: lfr track roller bearing