A. Retainer material
(1) the majority of the steel cage bearings are used, the most widely used is the wave-shaped carbon steel stamping, basket-shaped, box-shaped cage, etc., suitable for working conditions and environment bearing carbon chromium bearing steel; use of carbon steel plate stamping cage suitable for bearing condition and resistant to environmental corrosion bearing steel.
(2) non-ferrous metals with excellent surface finish quality. Work at high temperatures, can be used silicon bronze solid cage, operating temperature up to 315 degrees Celsius; because of the strength of aluminum lower than brass, light weight, and thus often used aluminum and brass solid cage, mainly applicable to speed a higher proportion of light, corrosion and other conditions.
(3) engineering plastics cage, there are great development in recent years, mainly because it has some corrosion resistance, good self-lubricating properties, low friction, easily obtained, inexpensive, easy to manufacture, etc., but easy "aging." Currently used by 66 of the most widely-reinforced nylon, it can continue working temperature range of -40 to 120 degrees Celsius.
Teflon high strength, self-lubricating properties, continuous operating temperatures up to 300 degrees Celsius, phenolic tape has high mechanical strength, excellent wear resistant properties, but expensive for high-speed spin around the operating temperature -40 to 150 degrees Celsius, up to 180 degrees Celsius instantaneous.
II. Rings and rolling materials
(1) high carbon chromium bearing steel
The vast majority of the bearing rings and rolling elements are colored with a special steel manufacturing. High carbon chromium bearing steel (GCr15 and GCr15SiMn with ZGCr15 and ZGCr15SiMn) manufacture rings and rolling elements, its parts hardness as follows:
GCr15 and ZGCr15 materials with rings and rollers for HRc61 ~ 65, the ball is HRc62 ~ 66;
GCr15SiMn and ZGCr15SiMn materials with rings and rollers for HRc60 ~ 64, the ball is HRc60 ~ 66.
With high carbon chromium bearing steel bearings are generally applicable to the operating temperature range of -40 to 130 degrees, oil and grease properly. Can meet the requirements of general machinery.
Carbon chromium bearing steel bearing parts at high temperature back too far, and its adaptation to temperature up to 250 degrees.
With advances in smelting technology, high carbon chromium bearing steel smelting can use different methods, such as vacuum smelting technology, which will enable the intrinsic quality of the steel greatly reform, particularly the oxygen content of non-metallic inclusions in steel and have formed significantly reduced. With this high carbon chromium bearing steel bearings, the fatigue life can grow exponentially.
According to a large number of experimental comparative data show that different methods to obtain smelting GCr15, GCr15SiMn, ZGCr15, ZGCr15SiMn bearing steel bearings.
(2) carburizing bearing steel
Carburizing bearing steel rings and rolling elements made, its hardness is: rings and rolling elements for HRc60 ~ 64, general fitness and working temperature range of -40 to 140 degrees Celsius, oil and grease properly, can under greater shock and vibration conditions, such as locomotives and rolling mill bearings, etc., but the steel heat treatment process more complicated.
(3) Heat bearing steel
Heat-resistant steel ferrule bearing rolling elements, its hardness: rings and rollers for HRc60 ~ 64, the ball is HRc61 ~ 65, under normal circumstances lubrication for the working temperature of 120 to 250 degrees Celsius, such as aircraft engines, gas turbines and other spindle working conditions.
(4) corrosion-resistant steel bearings
Corrosion resistant steel bearing rings and rolling elements, its hardness: rings and rolling elements should not be less than HRc58, for water, nitric acid, chemical reagents and other corrosive media, the temperature is -253 to 350 degrees Celsius.
