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IKO main bearing bearing sliding fault is mainly manifested in the location (typical location)

Example: The working surface of the double half inner ring angular contact ball bearing has slippage failure

Slippage generally occurs on a half-ring raceway of a double-half ring, and there is obvious tailing phenomenon, and one third of the spherical surface of the rolling element of the faulty bearing is discolored. Of course, there are also wide and narrow half-rings that have slippage at the same time, and there are also cases where the steel ball changes color and the inner ring does not slip.

The main cause of IKO roller bearing skid injury is the light weight of the rotor, which does not form sufficient radial load on the bearing; the main cause of ball bearing skid injury is the change of the axial load. In addition, when the movement resistance of the rolling elements and the cage is too large, the slipping and rubbing failure will occur.

IKO spindle bearing sliding fault factors

(1) Slip caused by insufficient axial load

When the axial load of the IKO bearing is insufficient, the radial force acts on the bearing and is transmitted to the steel ball to prevent it from forming an effective contact angle. The steel ball is in contact with the two half inner rings at the same time, forming multi-point contact. Then there is a slipping fault.

(2) Multi-point contact caused by insufficient radial clearance

The inner ring of the IKO bearing has a peach-shaped groove structure. In the case of insufficient radial clearance, it will cause the surface of the steel ball and the groove surface to slip and scratch.

(3) Slip caused by the spin of the steel ball

In a ball bearing that rotates at high speed and bears a certain axial load, a centrifugal force that deviates from the center of the ring and is distributed in the radial direction will be generated, which changes the force of the IKO bearing. Under the action of centrifugal force, the force of the steel ball on the outer ring channel is greatly increased, while at the same time the force between the steel ball and the inner ring channel is reduced. The change of the force on the inner and outer ring channels will affect the change of the contact angle between the steel ball and the inner and outer rings, resulting in a smaller contact angle of the outer ring and a larger contact angle of the inner ring.

In the case of a certain axial load, the higher the speed of the bearing, the greater the difference between the contact angles of the inner and outer rings. If the contact angle of the inner and outer ring is very different, it will affect the friction state in the bearing.