5311-ZZ, JAF/FBJ/FAG Brand, 2-Row Angular Contact Ball Bearing (0324k)5311 ZZ, 2 Row Angular Contact Ball Bearing. JAF Bearing No. 5311 ZZ Bore diameter (d) 55 mm Outer diameter (D) 120 mm Basic Load Rating Dynamic 23900 lbs Static 18500 lbs Speed Rating Grease 3300 RPM Weight 5. 100 lbs ABEC Rating ABEC 1 Grease Mobil Polyrex EM, 30 40% free volume fill Radial Internal Clearance (C3) +0. 018 to 0. 043 mm (+0. 0009 to 0. 0017 inch) Tolerance Inner Ring (d) +0 to 0. 015 mm (+0 to 0. 0006 inch) Outer Ring (D) +0 to 0. 015