Angle contact ball bearing installation form

There are three kinds of back-to-back, face-to-face and series. When installed back to back (the opposite sides of the two bearings), the contact angle of the bearing spreads in the direction of the axis of rotation, which increases the radial and axial support angle rigidity and resistance to deformation. When mounted face to face (opposite to the narrow faces of the two bearings), the contact angle of the bearing converges toward the direction of the axis of rotation, and the ground bearing angle is less rigid. Since the inner ring of the bearing protrudes from the outer ring, when the outer ring of the two bearings is pressed up, the original clearance of the outer ring is eliminated, and the preload of the bearing can be increased.