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Bearing failure analysis, in order to improve the reliability of systems engineering work surface an important part of the bearing (bearing job functions in the loss of its provisions, resulting in malfunction or failure of the phenomenon known as work (bearing failure can be classified according to their normal life failure and two early failures, this is mainly for pitting and fatigue lead to early bearing failure analysis and suggest improvements to enhance the TIMKEN bearing life and reliability.
TIMKEN Bearing fatigue failure is a failure surface forms, mainly for fatigue crack initiation, propagation and fracture processes in alternating load faults arising under long-term effects of the metal. Cracks in two ways:
On the surface, this is, TIMKEN bearings in rolling contact process, due to the work surface of the plastic deformation and strain hardening surface contact stress caused by cyclical changes in the role of external loads, and finally in the development of small cracks from the inside surface, in between the formation of surface cracks, wedged into the surface as a result of lubricant power open to crack down on the wall, forcing the forward crack;
From the surface layer, the repeated stress, the surface contact, the exposed surface of the first place in a certain depth of the cracks cracks and angle of the direction along the surface to a certain depth from the surface of the contact surface, and beyond the surface, and ultimately the formation of erosion stripped, leaving a Makeng.
On the surface, or from cracks in the surface layer, these two goals (parts carburizing, quenching and other heat treatment of the surface, and if it has uneven hardness, organizations, and non-uniform stress and other negative, then contact stress generally the opposite from the cracking of ground, if the parts of the surface quality is poor, there is a defect (oxidation and decarbonization), rubbing or poor lubrication, the surface cracks.
TIMKEN bearings, before testing, we first used to check the amount of blocks, standard parts and measuring instruments, sheet metal inspection of the premises under one roof, so that these objects can be rapidly the temperature and the room temperature homogenization.
Then we dry or dry TIMKEN bearings, drip oil for immediate delivery inspection, this time bearing outer surface protects the entire inspection process is not allowed direct contact with the skin, the film's human, the operator should wear clean gloves or hand painted rust, but must not be mixed with the bearing surface of the hands of the anti-rust agent, or the deviation of the measurement results.
TIMKEN bearings delivered until the cancellation of the routine examination before they can be sealed package and immersed in acid wash with gasoline or kerosene oil, 3%, turning the outer ring, and carefully rinse the cage, rolling element and raceway at the junction, requires residual Any traces of oil original hidden parts, rinse thoroughly. Bearing After cleaning, dry cleaning should pay attention to your neighbor, on the bench with a clean dry into neutral liner, or far-infrared drying furnace slowly. Because even dry neighbor drying or drying, the whole process should not close TIMKEN bearing ring, cage or rolling elements.
TIMKEN bearings in the inspection has been completed, it shall immediately deliver or rusting inventory process, to seize the whole inspection process should be completed in order to avoid last long cause corrosion. Note clean and free of oil, pure gasoline use, it can cause corrosion. Bearing repair and maintenance, rather than a simple repair and maintenance of our bearings do maintenance must strictly comply with the precautionary measures to avoid damage during repair of bearings, bearing the recommended professional maintenance personnel.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7015C NSK | 75 | 115 | 20 |
| 7013A NSK | 65 | 100 | 18 |