... : C0,C2,C3,C4,C56. Precision Grades: P0,P6,P5,P4,P2(ABEC1,ABEC3,ABEC5,ABEC7,ABEC9)7. Seal form: OPEN ... machine department can supply a full range of spare parts for undercarriage spare parts and bucket and so on . Our main ... link ,bolt & nut, bucket ,teeth ,adaptor,muffler etc . Ball and socket Bearing