A brief introduction about the small bearing

Usually, a set of bearing is a component, including two steel ring, every ring has a hard fluid passage, the make process of steel ball or roller is just above rolling. Ball or roller are collectively referred to as the rolling body, usually by a have been Da Vinci to illustrate its function of equiangular interval stents to separate. The stent is called separator or retainer. Rolling bearings are generally used to dissolve the fire high hardness, high surface hardness of steel to produce at least. Bearing industry widely used contain a suitable amount of chromium elements and easily through AISI52100 steel, quenching hardness of 61 - most of the bearing parts 65HRC。 Some manufacturers also made of the steel roller bearings. As miniature bearing more used in high sensitivity instrument such as gyroscope, such as general habit using AISI440C stainless steel to make the bearing parts. Roller bearings maker tend to adopt after surface hardening of steel such as AISI3310, 418, 4620, 8620 and 9310 to make the rollers and ring, etc. For some special purpose, such as car wheel hub bearing, roller bearing steel production parts general induction chamber by fire. In all cases, at least on the surface of the rolling parts have high hardness. In some applications, to reduce the ball or roller used to load, these parts with light weight and high strength of ceramic materials such as hydrogenated silicon manufacturing. In addition, under the ultra high temperature and in dry film or boundary lubrication applications, ceramic rolling parts than steel has a longer life expectancy. Compared with the ball and ring materials, materials general requirements of the cage to relatively soft some, they also must have good strength - Mass ratio. Therefore, materials with different physical properties, such as mild steel, brass, bronze, aluminum, polyethylene wash amine ( Dragon) , ptfe ( Teflon or PTFE) , glass fiber, carbon fiber reinforced plastics, are available for use as a retainer materials. In today's era of space explorations and network, many different types of bearings are already available, such as air bearing, box, bearing, magnetic bearing and hydrostatic bearings, etc. , those bearings are suitable for some specific application field. For example, in the space size, pressure fluid supply enough under overloading and requires high rigidity, hydrostatic bearing should be adopted. And as in high speed, light load, low friction and present the application of gas source condition, can use the pressure type air bearing. However, the application range of the rolling bearing is not too many restrictions.