Model number 30302 Bore Dia (d) 15mm Outer Dia (D) 42mm Width (B) 13mm Dynamic Load Rating (Cr) (Newtons) 22.8kn Static Load Rating (Cor) (Newtons) 21.5kn Max Speed (Grease) (X1000 RPM) 9000r/min Max Speed (Oil) (X1000 RPM) 12000r/min Weight (g) (grams) 0.094kg The taper roller bearing Material Ring Material Chrome Steel ,Carbon steel,Stainless steel Cage material Cage material Bearing Clearance C0,C2,C3,C4,C5 Bearing Vibration Zv1,Zv2 and Zv3 Bearing Greese As you requirement, such as SRL ,PS2, Alvania R12 and so on