YNR stainless steel handpiece dental ceramic bearing
|deep groove ball bearing|
1. Main Application:
( 1 ) High-speed bearings : Cold resistance, small mechanical flexibility , anti- stress, poor thermal conductivity, light weight, low friction coefficient etc., can be applied at 12,000 rev / min -75 000 rev / min high speed spindle and other precision equipment .
( 2 ) High temperature bearings: temperature of the material itself has 1200 centigrade, and good self-lubricating , temperature is not generated due to the expansion caused by temperature differences between the 100 -800 centigrade. Can be used in furnaces, plastic , steel and other high-temperature devices.
( 3 ) Corrosion-resistant bearings: the material itself has a corrosion-resistant properties , can be applied in the field of acids, alkali , inorganic and organic salts , water , etc. , such as: plating equipment , electronic equipment, chemical machinery , shipbuilding , medical equipment and so on.
( 4 ) Magnetic bearings: As it non-magnetic and dont attract dust can reduce bearing off in advance and avoid big noise . Available in demagnetization device. Precision instruments and other fields.
( 5 ) Electrical insulation bearings: Because of high resistivity, damage-free arc bearings, available in a variety of electrical equipment insulation requirements.
( 6 ) Vacuum Bearings: Due to the unique ceramic material is oil-free self-lubricating properties, in ultra-high vacuum environment, can overcome the plain bearing lubrication problems.
(1),As the corrosion resistance of the ceramic, the ceramic rolling bearing suitable for operation under harsh conditions covered corrosive media.
(2), Since the ceramic ball rolling lower density and lighter weight than steel, therefore the outer ring rotation centrifugal effect can be reduced by 40%, thus greatly extended service life.
(3), Due to the expansion and contraction of the ceramic affected smaller than steel, when have some gap of the bearing, it allows bearing working well in the temperature changes more severe environment.
(4), As the ceramic high modulus of elasticity than steel, not easily deformed when subjected to gravity,so it help to improve the operating speed and achieve high accuracy.
3 Field of application
Medical equipment, cryogenic engineering, optics, high-speed machine tools, high-speed motor, printing machinery, food processing machinery.
In the field of aerospace, marine, nuclear industry, petroleum, chemical industry, textile industry, machinery, metallurgy, electric power, food, locomotives, subway, high-speed machine tools and research needs of national defense and military technology and other high-temperature, high-speed, cryogenic, flammable, explosive, strong corrosion, vacuum, electrical insulation, non-magnetic, dry friction and other special conditions of work, the substitution effect ceramic bearings are indispensable been gradually understanding.
4 Material Classification
(1)Zirconia ceramic bearings
Full ceramic bearings with anti-magnetic insulation, abrasion resistant, oil-free self-lubricating, high temperature resistant, cold, etc., can be used in extremely harsh environments and special conditions. Rings and rolling with zirconium oxide (ZrO2) ceramic materials, maintaining the use of perchloroethylenes (PTFE) as the standard configuration, the general use of glass fiber reinforced nylon 66 (RPA66-25), special engineering plastics (PEEK, PI), stainless steel (AISISUS316), brass (Cu) etc.
(2)Silicon nitride ceramic bearings
Silicon nitride ceramic bearing rings and rolling silicon nitride (Si3N4) ceramic materials, the general use of RPA66-25, PEEK, PI, and phenolic cloth bakelite tubes. SiN4 system ZrO2 full ceramic bearing material suitable for comparing higher speed and load capacity, as well as suitable for higher ambient temperatures. Precision ceramic bearings for high speed and precision while providing high rigidity of the spindle, the highest manufacturing precision of P4 to UP grade
(3)Full ball ceramic bearings
Full ceramic bearings due to its spherical cage-free structural design, can be more than the ceramic ball bearing into the standard structure, thereby increasing its load capacity, while also avoiding the restrictions shelf materials can be achieved by ceramic cage type full ceramic bearing corrosion and temperature effects. The series bearings suitable for high speed, the installation should pay attention to the gap surface mounted on one end does not bear axial load.
(4)Hybrid ceramic ball bearings
Ceramic bearing especially silicon nitride ceramic ball has a low density, high hardness, low friction coefficient, wear resistance, self-lubricating and rigidity characteristics, especially suitable for high-speed, high-precision and long life hybrid ceramic ball bearings rolling elements (inner and outer rings metal). General inner and outer rings bearing steel (GCr15) or stainless steel (AISI440C), ceramic balls can be used ZrO2, Si3N4, or SiC material.