Bearings have a low-speed bearing or bearing? How to distinguish?

Up and down speed bearing is ordinary linear velocity rather than speed to locate. The speed of high-speed bearings are request to reach speeds in excess of 60 meters per second, so small bearings may be arbitrarily are tens of thousands, but not high-speed bearing, and large bearing a few hundred revolutions per minute even if high-speed bearing, linear velocity is big reason is the latter. In the sliding bearing, hydrostatic bearing, fluid dynamic pressure bearing, aerostatic bearing, gas dynamic pressure bearing is suitable at high speed. Ordinary with low-speed rolling bearings, high-speed common sliding bearing. Peer, rolling bearing in the ball bearing, spherical, cylindrical and conical. Ordinary in the sliding bearing is bearing shell. Fluctuation speed bearings after it is difficult to distinguish between appearance, and mostly in the common low-speed bearing and the price is cheap, but in the mechanical internal use of high-speed bearing. High-speed bearing used in ordinary machine internal cooling with liquid bearing oil smooth if the bearing is not used in cars on motor high speed no tripod central power, high speed bearing can also cool smooth with solid bearing oil. Internal use is ordinary launched machine transmission differential high-speed bearing, and chassis such as half shaft wheel hub bearing is the use of low speed bearing. If must be from the surface to identify speed bearings, up and down to see the following two points: 1, high speed bearing is higher than the accuracy of the low-speed bearing, and its surface roughness is small. Visual difference is high-speed bearing than the appearance of low speed bearing more lubrication, shaking high-speed bearing outer ring and inner ring gap smaller, and low speed, on the other hand. 2, high-speed bearing compared with low-speed bearing, the precision of the bearing steel ball or roller is different, and the precision is higher than the precision of the low-speed bearing raceway, high-speed bearing of high rank and good material, for example, the microstructure of steel, hardness, etc. In the ordinary rolling bearings with low rotation speed, if the use of high speed rotary rolling bearings needs special request, can on the basis of using the load elements such as reasonable choice of its model. If speed is between 5 to 60 meters per second is not high-speed bearing, ordinary only will smooth can meet the bearing. If use higher speed bearing in some special places, for example in high-speed cutting machine or fine processing machine tools using high-speed rotation axis ChengHai can use ceramic bearings, electrical, magnetic bearings and other special bearings, contact with professional manufacturers.