Self-aligning ball bearings. Design: Tapered bore. Bore diameter d: 50mm. Outside diameter D: 90mm. Width B: 20mm. Width outer ring C: 20mm. Shoulder diameter inner ring d1: 61.7mm. Shoulder diameter outer ring D1: 78.1mm. Protrusion of the balls from bearing side faces C1: 0mm. Chamfer dimension r1,2min: 1.1mm. Tapered bore, taper 1:X: Tapered bore, taper 1:12. Abutment diameter shaft damin: 57mm. Abutment diameter shaft damax: 62mm. Abutment diameter housing Damax: 83mm. Fillet radius ramax: 1.1mm. Basic dynamic load rating C: 26.5kN. Basic static load rating C0: 9.2kN. Fatigue load limit Pu: 0.48kN. Reference speed: 16000r/min. Limiting speed: 10000r/min. Calculation factor kr: 0.04. Calculation factor e: 0.21. Calculation factor Y0: 3.2. Calculation factor Y1: 3. Calculation factor Y2: 4.6.