I. Introduction Our company is a professional manufacturer of miniature bearings business, while operating various types of imported bearings, the production range between 1mm-22mm in diameter, there are 6 series, F series, MR series, R series, S series etc.; these series of bearings Our long-term stock price has an absolute advantage; while my company as well as all kinds of self-aligning ball bearings, cylindrical roller bearings, double row spherical roller bearings, needle roller bearings, angular contact ball bearings , tapered roller bearings, thrust ball bearings, spherical roller thrust bearings, linear bearings; quality and reasonable prices. Welcome to the needs of the company manufacturers call us to discuss two bearing material 1) rings, rolling the required material properties: rolling fatigue strength, high hardness, high wear resistance 2) cage material required performance : good dimensional stability, mechanical strength also need good processability. Depending on the application, and the required impact resistance, heat resistance, good corrosion resistance. 3) Materials and rolling rings: the rings and rolling typically use high carbon chromium bearing steel. Most of the bearing steel in the JIS SUJ2. SUJ2 chemical composition, in the world, as the bearing material has been normalized. For example: with AISL52100 (United States), DIN100Cr6 (West Germany), BS535A99 (UK), etc. are the same kinds of steel. Steel from the above, according to specific uses, the use of high-speed steel having excellent heat resistance, good corrosion resistance of stainless steel. 4) cage material: stamping retaining material, the use of low carbon steel. Depending on the application, use brass, stainless steel plate. Cutting material holder, the use of high-strength brass, carbon steel, in addition to a synthetic resin is also used. Third, the bearing performance 1) low noise; 2) high speed; 3) precision; 4) long life. Fourth, technical data 1) the role of lubrication on bearing lubrication rolling bearing fatigue life and friction, wear, temperature, vibration, etc. have a major impact, not properly lubricated bearings will not work. Analysis showed that causes bearing damage, bearing damage and about 40% are related to poor lubrication. Therefore, a good bearing lubrication is an effective measure to reduce friction and wear of the bearing. In addition, the bearing lubrication as well as heat, rust, seals, and other effects to ease the impact. 2) Grease lubrication grease base oil, thickener and additives for lubricants. When selected, you should choose very suitable for bearing grease conditions, due to different trademarks, the performance will also be a great difference, so when the choice must be careful. Bearing grease commonly used calcium-based grease, grease, sodium, calcium and sodium based grease, lithium grease, aluminum grease and molybdenum disulfide grease. Number of bearing grease filled, to fill the space inside the bearing 1/2-1/3 as appropriate. Should reduce speed to 1/3. Excessive grease will make the temperature increased. 3) Oil lubrication at high speed, high temperature conditions, greased oil lubrication is not suited to be used. By oil circulation, can take a lot of heat. 4) Viscosity Viscosity is an important characteristic of the lubricating oil, the viscosity of the oil film thickness directly affects the size of the flow of the lubricant between the friction surface and the formation of the charge, the temperature of the bearing oil viscosity is generally 12-18cst. The higher the speed should be selected lower viscosity, heavier loads higher viscosity should be selected. Commonly used lubricating mechanical oil, high-speed machine oil, turbine oil, compressor oil, transformer oil, cylinder oil. The WT tolerance of 6 grade/ABEC3 is as follows d (mm) △ dmp Vdp (diameter series) Vdmp Kia △ Bs Vbs 9 0,1 2,3,4 than over the minimum to the maximum max min max Maximum Maximum Maximum Max max max min Max Min Max max 2.0 10 0 -7 9 7 5 5 5 0 -120 15 10 18 0 -7 9 7 5 5 7 0 -120 20 18 30 0 -8 10 8 6 6 8 0 -120 20 3mm diameter the inner diameter of the inner diameter Outer Diameter Bore Diameter Width Width Type Type basic dynamic load rating Cr (N) Load Rating Cr (N) basic static load rating Cor (N) Load Rating Cor (N) Max.Speed ??Max.speed OPEN ZZ Grease Grease lubrication agent Oil * 1000rpm 3 6 2 2.5 MR63ZZ 209 74 71 80 7 2 3 683ZZ 311 112 63 75 8 2.5 3 MR83ZZ 395 141 60 67 8 3 4 693ZZ 558 180 60 67 9 2.5 4 MR93ZZ 571 189 56 67 9 3 5 603ZZ 571 189 56 67 10 4 4 623ZZ 631 219 50 60 13 5 5 633ZZ 1301 488 40 48