NSK bearing similarly careful when removing and installing. Note does not damage NSK bearings and other parts, especially interference fit bearing removal, operation difficult. Therefore, at the design stage to think ahead to the ease of disassembly, removal tool based on design is also very important. At the time of demolition, demolition according to drawing research method, order, investigated tie conditions to strike a demolition job of foolproof.
Demolition of the interference fit outer ring in advance on the circumference of the shell sets the extrusion screw several outer rings with screws, and equally tighten the screw, while demolition. Blind plug the screw holes on the usual cover, separable bearings of tapered roller bearing, in setting shell shoulders several incisions, using the pad, press remove, or gently beating demolition.
Demolition of inner ring, can pressure machine pull the latest simple. At this point, should pay attention to the inner ring to sustain its pullout.
Large-scale demolition using hydraulic method of inner ring of the bearing. By setting the oil hole oil pressure on the axis, so easy to draw. Width of NSK bearings oil injection combined with drawing fixture, the demolition job.
NU, NJ type cylindrical roller bearing inner ring removal can take advantage of induction heating method. Local heating in a short time, after the inner ring expansion method for drawing.
Removing relatively small adapter sleeve bearings, with block support for fastening on the axis of inner ring, the nut back after several times, using hammers beating demolition for pad.
Large bearings, hydraulic removal easier, taper hole of pressurization oil oil hole on the axis, so that the inner ring expansion, disassembling bearing method. In operation, the bearing prolapse may suddenly, it is best to use nuts as a block as well.
NSK bearing Raceway or the rolling surface, due to withstand the alternating load effect of contact surface metal is flaking, and gradually expanded to form pits. If it continues to run, you will form an area of Peel region. Due to improper installation or bearing block hole and shaft in the bearing centerline tilt reasons of early fatigue failure occurs, local area bear larger loads.
Material defects and improper heat treatment, with the interference is too large, the combination of bad design, such as seating stress concentrations caused by grooves, will form rings of cracks and breakage.
When the external substances into durum in NSK bearings and pressure between the rolling elements and raceways, allows scrolling surface indentation. In addition, excessive shock loads can also make the contact surface formed by local plastic deformation of potholes. When the bearing at rest, even if the load is small, due to the vibration of the surrounding environment will also form pits of uniform distribution on the Raceway.
When rolling bearing seal well, bringing dust or particulate matter into the bearings, or poor lubrication, contact surface caused more severe scratches or wear, and bearing vibration and noise increases.
Current through the bearing, will produce a small electrical discharge, cause small pits or at the contact surfaces of partial annealing and black highlights. Serious cases into the larger potholes will appear.
Water or substances such as acids, alkalis, salts or intrusion into or lubricant improper selection will refer to bearing corrosion of bearings, precision bearing even if minor corrosion would scrap the bearing.
NSK bearings, especially high speed bearings, due to lack of lubricant, cage and rolling elements or wear ring contact, collisions, or even lead to fracture of cage.


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