Spherical ball bearings due to different environments, so erosion is different, because the erosion in different ways. Bearings and certainly not escape this destiny by erosion, NSK bearings are speaking in terms of the following three ways to erode.
1, cavitation
Cavitation with spherical bearings are solid surfaces that result from contact with liquids and relative motion of surface damage. When the oil film lubricating oil low pressure area, and will form a bubble in oil, bubble motion to high pressure area, bubble collapsing under the pressure, in the collapsing of the moment had a tremendous impact and high temperature, solid surface under repeated impact, material fatigue loss occurs, the friction surface of small pits, which developed into a cavernous scar. Heavy haul, high speed, and large bearing load and speed variations, cavitation occurs;
2, fluid erosion
Spherical ball bearings of a fluid erosion is fluid fluid erosion caused by intense impact on solid surfaces, punctate scars that appear on the solid surface, the smooth surface of this injury;
3, electro-erosion
NSK bearing erosion refers to the motor or electrical leakage, with spherical bearings friction surfaces between the EDM, punctate scars caused by friction on the surface, characterized by damage of reciprocating appeared on the hard surface of the shaft.
If you want to predict the fatigue life of bearings with spherical, remaining life of judge on the need for all the fatigue failure of bearing, that this will take a long time. However, due to rolling fatigue is fatigue that occurred under the compressive stress at the point of contact to reach breakage would occur a significant material change. Therefore, in addition to the earlier cracks, surface Raceway affected by chemical, crack extension prior to the material change in circumstances, detect bearing fatigue by material change is possible.
Scrape the bearings, shaft neck and cavity old grease, wash it with detergent and bearings NSK bearings with a dry cloth, and finally clean the inside with a cloth.　　
Check the bearing and the bearing seat, found cracks, fatigue phenomena such as flaking and bearings rollers are loose, the bearings should be replaced.　　If found spots on the housing washer, the bearings should be replaced.
Check inside diameter of spherical bearing and shaft alignment and clearance shall not exceed 0.10MM when measuring shaft, vertical surface should be in two parts (the Department for maximum wear and tear parts) measurements. If the clearance exceeds limits set using, the bearings should be replaced, so back to normal clearance.　　Burr in journal is not allowed, the Commission points to narrow the gap.
After all the parts have to meet the requirements, after smearing grease of bearings.
　 Bearings with spherical cavity smear grease should note that grease should be packed into the NSK bearing up until the grease coming out the opposite side of the bearing. Within the cavity and the shaft Cap apply a thin layer of grease, rust effect to make it.　　Note the grease cavity do not apply too much, otherwise it will affect cooling and braking.
And the outer bearing on the back axle, spindle head adjustment screw on the nut with your hand, and then with the shaft wrench tighten the adjusting nut on the required torque. After you tighten the nut, rotate around, bearing installation on the other, by pivot bearing and seat the right tie. NSK bearings are tight fit wheel freely rotating and not feel out of the axial clearance.
Final turn lock plate, the retaining nuts, wheel, dust cover and decorative cover.
Pillow block bearing adjustment is completed, a milestone (10km per cent), traffic stop, used to wipe the touch temperature if fever, NSK bearings are adjusted too tight, relocation, appropriate relaxation bearing tightness.