Limiting speeds of bearings depend on the bearing type, size, load , lubrication, clearance etc. Appropriate conditions of limiting speed listed in this catalog are:
equivalent dynamic load P 0.1C, radial bearings carry pure radial load, thrust bearings only carry axial load, cooling condition is normal, housing and shaft are
stiffness, manufacturing accuracy of bearing is ordinary class.
If bearings do not conform to the above conditions
(e.g. P>0.1C or bearings carry combined load of radial and
axial), the operating speed of bearings should be lower
than a given limiting speed, so reduction speed factors
f1,f2 are introduced, their values can be taken from Fig.
5.1 and Fig. 5.2.
If limiting speed listed in this catalog do not meet
the requirements, the limiting speed can be increased by
means of improving manufacturing accuracy, increasing
clearance values and using circulating oil, mist or oil
jet lubrications and selecting special materials and
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