(1) force Heli whenever possible through the axis of the SKF bearings, this requires a uniform point of application symmetrically and smoothly, through the force of the sphere, or parallel to the axis.
(2) the size of the force should be smooth and uniform, not shocks, this requires the use of oil or to impose a tool for smooth tension or pressure, would certainly have a hammer is also do not fall through the copper sleeve soft scrap metal to be buffered, strike force as mitigation. It is best to use copper or copper hammer hammer.
(3) avoid the rolling force, this required assembling and dismantling the inner ring (shaft washer), through the inner ring of force, when assembling and dismantling the outer ring) by applying pressure in the outer ring.
(4) the drag force to be sustainable to the extent, for example when mounting SKF bearings to just stop when filled to the correct location of the bearings force to ensure the rings (washers) the face arrives in bore or axial abutment face, neither squeezed too tightly and unable to load is not in place.
　Scanning electron microscopy at high magnification observation of fracture site and found that the feature has the following several points:
　　① magnification observation, visible micro-morphology of a number of fan-shaped pattern.
　　③ observation on morphology of fan-shaped pattern at different angles are different, fan-shaped pattern was different plane crack formation of connections. Observation of crack growth in a high area, found a typical fatigue crack; low expansion crack source scanned source Beach designs can be found around the crack, crack corrosion pit distribution source region has a large number of, some of the corrosion pit connections into line, mud flower morphology.
　　④ accept highest stress, reinforced by water jacket cylinder by thermal contact. Stress and b minor. SKF bearings water main recipients of blasting stress at work, stress and thermal stress Assembly three kinds of stress. Maximum stress water for circumferential stress, whose value is estimated at 128MPa is an oil fire is a random anomaly workpiece spark burn abnormal defects often seriously affect the workpiece surface quality and performance of our products, or even failure scrap of the workpiece is not qualified, special appearance or an important workpiece surface quality requires high precision workpieces are even more so.
　　⑤ observation found in production, induction heating, the workpiece is not regular contacts and sensors spark, SKF bearings noise generated by very sensitive. So in order to adhere to the SKF bearings for smooth operation, the General reliability of sintered bronze bearings, but also to take a number of measures, such as proper control of sintering conditions, organization is a single phase a of the alloy and corrosion prevention technology measures can be used; another way is to make the appearance compressive stress, served to offset the water jacket to withstand the tensile stress.
　　As can be seen bearings the water jacket and tie condition of cylinder liner, reinforced by a water jacket cylinder by thermal contact, withstand the highest stress, stress and b minor. SKF bearings water main under blasting stress at work, stress and thermal stress Assembly three kinds of stress. Maximum stress water for circumferential stress, whose value is estimated at 128MPa, inner wall of water maximum stress is about 98MPa.


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