Thin-walled crossed roller bearings are composed of crossed cylindrical roller bearings and crossed tapered roller bearings. Due to their particularity and incomparable advantages over other bearings, they are widely used, and some damages will inevitably occur in the use engineering , so what are the damage forms of thin-walled cross rollers?

Surface wear and peeling of rolling elements (balls and balls, etc.) and inner and outer ring raceways:

This will cause the radial clearance and axial clearance of the thin-walled crossed roller bearing to increase, the thin-walled crossed roller bearing will emit noise and heat during operation, and change the correct working position of the mating shaft, resulting in vibration. The initial stage of surface fatigue spalling is pitting on the surface, which develops into flaky surface exfoliation. Both the rolling elements of the bearing and the raceway surfaces of the inner and outer rings are subjected to periodic pulsating loads, resulting in periodically changing contact stress.

When the number of stress cycles reaches a certain number, fatigue spalling occurs on the working surface of the rolling elements or inner and outer ring raceways. If the load of the bearing is too large, this fatigue will be exacerbated. In addition, if the bearing is installed incorrectly and the shaft is bent, the raceway will also peel off. The fatigue spalling of the bearing raceway will reduce the running accuracy of the shaft and generate vibration and noise.

crossed roller bearings

Wear of mating surfaces of inner and outer rings:

This is because the inner and outer rings of the thin-walled crossed roller bearing are not assembled with the shaft and the housing hole, which destroys the matching relationship between the bearing and the housing, the bearing and the shaft, and further accelerates the matching between the bearing itself and the shaft or housing that matches it. Surface wear (commonly known as the inner or outer ring of the shaft).

Spacer wear and looseness:

During work, the isolation ring and the rolling elements (balls, rollers, etc.) rub against each other, and if the lubrication is poor, the wear will be accelerated. After the isolation ring is worn, the rolling elements will loosen, and in severe cases, the isolation ring will fall apart and the rolling elements will fall off.

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