Why is the rated speed of deep groove ball bearings (reference speed) greater than the limit speed, greater than almost double?. Only deep groove ball bearings are like this? Why?
LZ, look at the SKF manual!SKF's deep groove ball bearing manual is so marked. You can look at other brand manuals.For example: Japan's four major companies NSK, NTN, KOYO, NACHIGermany FAGAmerican TIMKENThese brands of ordinary deep groove ball bearings, performance parameters are very close, can be compared more. SKF really do not understand, but the quality of bearings are indeed commendable.
Reference speed (with respect to heat) and limit speed (as opposed to physical structure) are parameters that vary according to consideration. Because the contact surface of the deep groove ball bearing is the smallest, and the friction force is the smallest, so the reference speed will be higher than the limit speed.
The maximum speed of various bearings can be checked by table, and the ultimate speed of deep groove ball bearings is very high. But, "why is the rated speed of deep groove ball bearings (reference speed) greater than the limit speed, greater than almost double?". Only deep groove ball bearings are like this?" Where does that come from? No, it will damage the bearings very soon.
