Date: 2013-08-20

NSK bearings, load ratings

The static load of the bearing:
Bearings in the following situations, you should use the calculation of the basic static load rating C0:
Low speed (n<10 r/min) reciprocating oscillating slowly, under the action of load time stationary, rotating (to withstand dynamic stress) or static state of NSK bearings, load in a short time, must also check the safety factor, including shock loads or the maximum load. Basic static load rating ISO 76:1981 standards, equivalent to the most heavily loaded rolling element and the Raceway contact centre,
The calculation of contact stress:
For self-aligning ball bearings 4600Mpa
For all other ball bearings 4200Mpa
For all roller bearings 4000Mpa
In this stress will cause permanent deformation of the rolling element and the Raceway, approximately 0.0001 of the rolling element diameter. For radial bearings, load for pure radial load thrust bearing, is a function in NSK bearing axial loads.
Checking the static load of the bearing: refers to the calculated static load safety factor, defined as the:-s0=C0/P0:
C0= the basic static load rating, KN
P0= equivalent static load, KN
S0= static load safety factor
When calculating the equivalent static load, the maximum load that can occur should be substituted.
Dynamic bearing loads
Basic dynamic load rating c functions to calculate bearings under dynamic stress, that is, turning under load bearing. Its shows achieved ISO 281:1990 NSK bearing loading, basic rating life of 1 million cycles. Magnitude and direction of the load is assumed constant. For radial bearings, and loads for pure radial load, for thrust bearings, is in the Centre of the bearing axial loads.
Rolling bearing life defined as first appeared on one of the bearing rings and rolling fatigue of metals (peel or break) before you sign, NSK bearings can reach to a few working hours at a certain speed; proven to seemingly identical bearings under the working conditions, still different life will be achieved.

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