... slewing ring Basic data (Q Series): The single-row four points contact ball Slewing Bearing is composed of ... .The balls contact with the circular race at four points,via which the axial force,radial force ... Gear(max) 12-201--Type of slewing ring Single-row ball Q Series2-- Code of driven typeW ... ,A.normal7--precision gradeHigh precision,without G.normal Single-row ball,bigger module,outer gear,Outer ring ...