Selection principle of precision spindle bearing is analysed - bearing knowledge

Machine tool spindle bearing contact Angle generally choose 15 ° and 25 °, and widely used. Angular contact ball bearing according to the size of the spindle is under load, stiffness can choose more transmitte structure mode.     A pair of back-to-back angular contact ball bearing, its characteristic is the main shaft is skewed.     A pair of angular contact ball bearing face to face, its characteristic is the main shaft has good accuracy retention.     A series of angular contact ball bearing, it can bear larger axial load, so the contact Angle is 25 °.     Two bearing series and the third back-to-back structure, it make the spindle has good rigidity, high speed, widely used in CNC lathe, machining center, etc.     The selection of high-speed precision spindle bearing & emsp;   High speed precision spindle bearing dN value generally greater than zero. 6 x106m Mr/min, angular contact ball bearing should choose inner ring lock mouth, cage outside diameter or inner guidance. This structure is conducive to lubricating oil along the channel and rolling body internal lock into the bearing, its limit rotational speed is 30% higher than Angle contact ball bearing outer ring lock. These bearings are widely used in the precision grinding machine on motorized spindle and the spindle, grinding the axial load is not big, often using the contact Angle is 15 ° angular contact ball bearings. The article links: machine tool business website http://www. jc35. com/tech_news/detail/92555。 html