| Often high-speed spindle support member installed in pairs |
| 11-15 |
High-speed precision angular contact ball bearings , mainly used for high-speed rotating occasions lighter loads , requiring high precision bearings , high speed, low vibration and low temperature rise a certain life . Often high-speed spindle support member installed in pairs , is the inner surface grinding spindle speed key component parts .The main technical indicators:1 bearing precision index : Over GB/307.1-94 P4 class precision2 high-speed performance: dmN value 1.3 ~ 1.8x 106 / min3 life ( average ):> 1500 hHigh-speed precision angular contact ball bearing service life of a great relationship with the installation , you should note the following1 bearing installation should be clean , clean room for the thin bearings to be carefully matching, bearing spacers to go through the grind of maintaining high inner and outer ring spacers under the premise of the spacer should be controlled in parallel 1um the following ;(2) Before installing the bearings should be cleaned , cleaning the inner slope upward , feel should be flexible , no sense of stagnation , dried , placed in a predetermined amount grease, oil mist lubrication bearing company should be placed in the case of a small amount of oil mist ;3 bearing installation tool should be used exclusively , even by force , is strictly prohibited beat ;4 bearing deposit should be clean and ventilated , non-corrosive gases, relative humidity less than 65% , long-term storage should be periodically rust.
| Cold start or lubricant viscosity is very high |
| 11-15 |
In order to ensure roller bearing manufacturer satisfactory performance , needle roller / angular contact ball bearings like all ball bearings and roller bearings , must always bear acting on the radial and axial certain minimum load , especially if they want to run at high speed or subjected to high accelerations or rapid changes in the load direction . Under these conditions , the rolling element and the inertia force of the retainer and lubricants friction bearing arrangement may play a deleterious effect on the rolling conditions , and may cause the rolling element and the raceway between the sliding destructive .Increase in radial needle bearing on the necessary cross roller bearing minimum radial load can be estimated using the following formula :Frm = 0.02 CAngular contact ball bearings necessary minimum axial load can be calculated using the following formula :WhereFrm = minimum radial load, kNFam = minimum axial load, kNC = basic dynamic load rating ( see product table ) , kNC0 = basic static load rating ( see product table ) , kNdm = bearing mean diameter= 0,5 (d + D), mmn = rotational speed, r / minCold start or lubricant viscosity is very high, even demanding loads. Bearing weight of the components together with external forces generally exceed the minimum necessary load. If this is not the case, you must give Needle roller / angular contact ball bearings impose additional radial and / or axial loads.
| clean room for the bearing to be carefully matching |
| 11-14 |
Imported high-speed precision angular contact ball bearings , mainly used for high-speed rotating occasions lighter loads , requiring high precision bearings , high speed, low vibration and low temperature rise a certain life . Often high-speed spindle support member installed in pairs , is the inner surface grinding spindle speed key component parts .The main technical indicators:1 bearing precision index : Over GB/307.1-94 P4 class precision2 high-speed performance: dmN value 1.3 ~ 1.8x 106 / min3 life ( average ):> 1500 hHigh-speed precision angular contact angular contact ball bearing ball bearing service life of a great relationship with the installation , you should note the following1 bearing installation should be clean , clean room for the bearing to be carefully matching, bearing spacers to go through the grind of maintaining high inner and outer ring spacers under the premise of the spacer should be controlled in parallel 1um the following ;(2) Before installing the bearings should be cleaned , cleaning the inner slope upward , feel should be flexible , no sense of stagnation , dried , placed in a predetermined amount grease, oil mist lubrication should be placed in the case slewing bearing suppliers of a small amount of oil mist ;3 bearing installation tool should be used exclusively , even by force , is strictly prohibited beat ;4 bearing deposit should be clean and ventilated , non-corrosive gases, relative humidity less than 65% , long-term storage should be periodically rust.
| no useful for non-ferrous metals |
| 11-13 |
1, under normal conditions, the roller bearing co efficiency and hydrodynamic bearings lubricated bearings pretty, but more mixed lubricated bearings should be higher;2, the radial clearance is relatively small, radial angular contact bearings can be used preload preload to eliminate backlash, high running accuracy;3, for the same size shaft, bearing a width smaller than the sliding bearings, make the machine compact in the axial direction;4, most of the rolling bearing can be thin bearings subject to both radial and axial loads, so bearing composite structure is simple;5, less lubricant consumption, easy to seal, easy to maintain;6, no useful for non-ferrous metals;7, the high degree of standardization, mass production, low cost;
