6805 61805 полный SI3N4 нитрида кремния керамические радиальный шарикоподшипник 25x37x7 мм

6805 61805 полный SI3N4 нитрида кремния керамические радиальный шарикоподшипник 25x37x7 мм

Free shipping 6805 61805 full SI3N4 silicon nitride ceramic deep groove ball bearing 25x37x7mm bike bearing,MTB bicycle bearing

Quality :SI3N4 Ceramic inner and outer rings,

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.

  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.