The bud and the bearing is miniature series used material and dust cover have?

The bud and the bearing is miniature series used material and dust cover have? We all know that the bud and the bearing is the main use of high carbon chromium bearing steel and corrosion resistance of martensitic stainless steel as the material of rail wheel and the ball. And the high carbon chromium bearing steel is used high quality vacuum degassing high carbon chromium bearing steel ( JIS G 4805/SUJ 2、AISI/SAE E52100) And quite a material, can guarantee the quenching hardness, excellent resistance to load, long life and low noise characteristics. Use of stainless steel is the page and to develop 'DD400' material, than SUS440C with higher quenching hardness, longer life and more excellent load resistance. In addition, the carbon has spherical fine dispersion characteristics, noise characteristics of similar to chrome steel can be obtained. In terms of corrosion resistance, based on ASTM - The experimental results show that the A380 'DD400' is equal to SUS440C corrosion resistant properties. In addition, in recent years to adapt to the demand for long life and low noise, bearing the company also produces ceramic material of rolling ball bearing. The orbit of the bearing wheel using previous chromium bearing steel, use ceramic ball ( Silicon nitride) 。 Compared with the previous chromium bearing steel ball, with the advantages of low noise and long life with. In addition, the silicon nitride peculiar to the connectivity of a close to zero, Insulation performance) To prevent the bearing inner electricity environment when using the electric corrosion is also very effective. Light weight compared with bearing steel, ceramics, in the aspect of reducing torque is also worth looking forward to. （ 1) Steel dust cover ZZ: made up of steel dust cover and snap ring, nominal model for ZZ. USES the dust cover with a split ring will plate fixed on the outer ring structure, the dust cover inside and outside the inner ring weeks not contact. （ 2) Steel dust cover, KK,HH） : bearing nominal model for KK or HH, JIS nominal model for ZZ, USES the steel plate dust cover directly fixed on the outer ring structure, the dust cover inside and outside the inner ring weeks not contact. （ 3) Rubber seal ( 党卫军,DD) Bearing nominal model for SS and DD, USES the insert sheet forming structure of rubber seal directly fixed on the outer ring, seal and inner ring peripheral is not contact with SS and contact of the DD. DD type with sealing, torque is bigger.