一、Calculation for single-row ball slewing ring 1、Capacity of slewing ring C0 = f ·D·d In Equality:Co ——Capacity of bearing ,N f ——Capacity factor ,110 N / mm2 D ——Diameter of track center ,mm d ——Diameter of ball ,mm 2、Loading calculation Cp = P + 4370 M/D + 3.44 Fr In Equality:Cp ——Loading caculation , kN M ——Toppling movement ,kN·m Fa ——Axial force ,kN Fr ——Radial force ,kN 3、Safety factor calculation fs = Co / Cp fs see the following table。 二、 Calculation for 3-row-roller slewing ring bearing 1、Capacity of slewing ring C0 = f ·D·d In Equality:Co ——Capacity of bearing ,N f ——Capacity factor ,147N / mm2 D ——Diameter of track center,mm d ——Upper row roller diameter,mm 2、Loading caculation Cp = P + 4500 M/D In Equality:Cp ——Loading caculation,kN M ——Toppling movement ,kN·m Fa ——Axial force,kN 3、Safety factor calculation fs = Co / Cp fs see the following table 。 Slewing ring safety factor fs |