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Are everyone familiar with toothed chain gears? It is a relatively important basic component in mechanical equipment; it has powerful functions. However, once there is a failure in the sprocket, it will directly affect work efficiency, which is surely something no one wants to see. To avoid such situations, let’s take a look at the reasons that lead to the failure of sprockets. 1. Wear of the tooth surfaces of sprocket gears: In open gear drives or closed gear drives using contaminated lubricating oil, relative sliding between the meshing tooth surfaces allows some harder abrasive particles to reach the friction surface, resulting in changes to the tooth profile and an increase in side clearance. This leads to excessive thinning of the sprocket gear teeth, ultimately causing them to break. Under normal circumstances, tooth surface abrasive wear during operation occurs only when abrasive particles are present in the lubricating oil. 2. Adhesion of tooth surfaces in sprocket gears: In high-speed, heavy-load gear transmissions, the high friction between the tooth surfaces along with high relative speeds result in excessively high temperatures in the meshing area. When the lubrication conditions are poor, the oil film between the tooth surfaces disappears, allowing the metal surfaces of the two teeth to come into direct contact and thus stick together. 3. Fatigue pitting of sprocket teeth: When the teeth of two meshing gears come into contact, the forces and reactions between the tooth surfaces generate contact stresses on these working surfaces. Since the position of the point of engagement changes, and since the sprocket teeth move in a periodic manner, the contact stresses vary in a pulsating cycle. 4. Tooth fracture in sprockets: The gears that bear loads during operation act like cantilever beams; when the stress applied cyclically at their roots exceeds the fatigue limit of the material from which the sprocket teeth are made, cracks appear at those roots and gradually spread. When the remaining part of the tooth can no longer withstand the transmission load, tooth fracture occurs. Serrated chain gears cause uneven loading on the serrated chain conveyor due to severe shocks during operation. 5. Plastic deformation of the tooth surface of sprocket gears: Under impact loads or heavy loads, local plastic deformation can occur on the tooth surface, thereby causing deformation of the surface of the involute tooth profile. Do you know the reasons for the failure of sprocket gears? These are all factors that cannot be ignored. Want to learn more? Follow us right away.