Nachi 5309BNLS - 5300 Series Double Row Angular Contact, MFR ID NAC-5309

Double-Row Angular Contact Ball Bearings have a thinner width than 2 stacked Deep-Groove bearings can sustain combined loads of simultaneously acting radial and axial loads because they have a contact angle (α). The contact angle is defined as the angle between the line joining the points of contact between the ball and the raceways in the radial plane.