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Be stripped
Injury status: TIMKEN bearing load when rotating, the inner ring, outer ring raceway surface rolling or peeling phenomenon decent due to rolling fatigue and showed scaly.
Cause: excessive load. Install side (non linear) torque load, water intrusion. Poor lubrication, the lubricant is not suitable for TIMKEN bearing clearance is not appropriate. TIMKEN bearing box accuracy is not good, TIMKEN bearing box rigid uneven axial deflection of large rust, erosion point, scratch and indentation (surface deformation) causes the development.
Measures: check the load size and re study used TIMKEN bearing improved installation method to improve the sealing device, shutdown protection. The use of appropriate viscosity lubricant, improve lubrication method. Check the shaft and TIMKEN bearings box accuracy. Check the clearance.
Peeling
Injury status: emerged with a dark face slightly worn, dark face by surface into a plurality of small cracks to a depth of 5-10m, and occur in a wide range of small (micro peeling off)
Reason: not suitable lubricant. Foreign body into the lubricant. Lubricant due to poor surface roughness. The pairing of rolling parts of the surface finish is not good.
Measures: the choice of lubricant improve sealing device to improve the matching of rolling parts of the surface finish.
Card.
Injury status: the so-called injury due to surface damage small burn in sliding surface injury caused part of the summary. Linear scar slide surface, rolling surface circumference. Axis card injury torus roller end of cycloid shaped scars near the roller end.
Cause: excessive load, excessive preloading. Bad lubrication. Foreign body bite. Deflection inclined shaft, inner and outer ring. Shaft, TIMKEN bearing box poor accuracy.
Measures: check the load size. The pre pressure should be appropriate. Improving lubricant and lubrication method. Check the shaft, TIMKEN bearing box accuracy.
Crack
Damage: the so-called fracture is due to rolling block local part edge or roller angle of road wheel applied shocks or excessive loads and a small part of the fracture.
Reason: a blow to the installation. Excessive load. Drop the use of bad.
Measures: to improve the method of installation (with hot charging, use appropriate tool holder). Correct loading conditions. TIMKEN bearing installation in place, so that the flange supported.
Crack, crack
Damage: the so-called crack refers to the rolling body raceway round or crack damage. If you continue to use, the cracks will also include development of crack.
Reason: too large interference. Excessive load, impact load. Stripping some development. Fever caused by raceway round of contacts with the installed components and fretting wear. Fever caused by creep. Cone angle of cone axis of malnutrition. The axis of a cylindrical bad. Axis step corner radius than the TIMKEN bearing chamfer caused by interference with TIMKEN bearing chamfer.
Measures: interference fit. Check the load conditions. Improved installation method. The shape of the axle to the appropriate.
Indentation
Injury status: bite a small metal powder, when foreign bodies, in the raceway surface or rotating dent generated on the surface of. Since the installation of impact, in the rolling of the spacing interval on the formation of a concave (Brinell hardness indentation).
Reason: foreign metal powder bite. Impact load assembly or in the transportation process is too large.
Measures: the impact sleeve. The improvement of sealing device. Oil filter. Improve assembly and method of use.
Pear skin pitting