2 шт. 6806 61806 керамический подшипник ZrO2 шарикоподшипник 30x42x7 мм велосипед Подшипник

2 шт. 6806 61806 керамический подшипник ZrO2 шарикоподшипник 30x42x7 мм велосипед Подшипник

6806 61806 full ZrO2 ceramic deep groove ball bearing 30x42x7mm bike bearing,MTB bicycle bearing for racing bike wheels

Size:

Inner diameter 30mm

Outer diameter 42mm

Thickness 7mm

Inner ring,outer ring,balls : ZrO2

PTFE cage

No seal

Because there are two many different kinds of bearings,so we cann;t show all bearing in our shop,so if you want some models that are not in shop, please contact me for more information.

  1, high-speed: a cold, a small force elasticity, anti-stress, poor thermal conductivity, light weight, low friction coefficient, etc., can be applied to 12,000 rev / min to 75,000 rev / min high-speed spindles and other precision equipment in;  

2, high temperature: temperature of the material itself has 1200 degree, and good self-lubricating, normal temperatures between 180 degree~ -260 degree, no swelling caused due to temperature. Full silicon nitride ceramic ball bearings at 800-1000 degree,normal temperature can be used in furnaces, made of plastic, steel and other high-temperature devices;   

3, corrosion: material itself has corrosion-resistant properties, can be applied in the field of acid, alkali, inorganic, organic salt, water, such as: plating equipment, electronic equipment, chemical machinery, shipbuilding, medical equipment.   

4, magnetic: do not smoke because of non-magnetic dust can reduce premature bearing spalling, noise and large. Available in the demagnetization equipment. Precision instruments and other fields.   

5, electrical insulation: due to the high resistance force, can avoid arcing damage bearings, available in a variety of requirements for insulation of electrical equipment.   

6, vacuum: due to ceramic materials with unique oil-free self-lubricating properties, in ultra-high vacuum environment, the silicon nitride ceramic bearings can not be achieved to overcome the plain bearing lubrication problems.  

7. Water-proof

  Main purpose:

   Medical equipment, optical equipment, printing machinery, high-speed machine tools, high-speed motor, cryogenic engineering, food processing machinery, reactors, high-temperature furnaces, Medical apparatus and instruments, optical instruments, printing machines, cryogenic engineering, bicycles and some other transport.

Other type structure:

Full full ceramic ball bearings

Full ceramic bearing magnetoelectricity insulation resistance, wear-resisting corrosion resistance, free of self-lubrication, characteristics such as high temperature resistance, cold resistance, can be used in extremely harsh environment and the special operating mode. Ring and roller adopts silicon nitride (SI3N4) ceramic materials.

Full ball full ceramic bearing side with ball gap, with no cage structure design, can be more than standard bearing load of the structure of ceramic ball, thus improve the radial load capacity, also can avoid the cage material limit, can achieve the ceramic type cage full ceramic bearing corrosion resistant and temperature resistant effect. This series of bearing is not suitable for high speed, when installation should pay attention to the gap surface mounted on one end of the don't carry axial load. Because of the bearing inner and outer ring gap filling ball, it was not suitable for large axial load application occasions.

The difference between material ZrO2 and SI3N4:

1. A product profile of the zirconia (ZRO2) ceramic ball

Zirconia ceramic ball at room temperature with high strength and high toughness, good wear resistance, high temperature resistance, corrosion resistance, high stiffness, permeability, electrical insulation. Zirconia ceramics ball at 600 degree, strength and hardness is almost the same its density of 6.00 g/cm3, close to the metal thermal expansion rate if the inflation rate, can be used with metal joint.

2. The silicon nitride (SI3N4) ceramic ball product introductio

Silicon nitride ceramic balls are in the high temperature oxidation atmosphere sintering precision ceramics, high strength, high wear resistance, high temperature resistance, corrosion resistance, acid resistance, alkali, can be used in water medium, and has the good performance of insulation materials magnetic. At 800 degree, the strength and hardness is almost the same, its density is 3.20 g/cm3, is almost 1/3 of the bearing steel. Weight, rotating centrifugal force small. Can realize high-speed operation. Also have self lubrication, it can be used to no lubrication medium high pollution of environment. Become a ceramic bearing, hybrid ceramic ball bearing material of choice.