... with the circular race at four points,via which the axial force,radial force and resultant moment may be born simultaneously ... ,A.normal7--precision gradeHigh precision,without G.normal Single-row ball,bigger module,outer gear,Outer ring with installation screw holes ... installation bolt holes,Dia.of track center 1250mm,Dia.of ball 40mmOEM supplier for Excavator for your reference, nice quality R260LC ...