Angular contact ball bearings in the axial preload under the conditions to work properly. Preload
can not only eliminate the axial clearance of the bearing, but also can
improve the bearing stiffness and spindle rotation accuracy, inhibit
vibration and ball rotation when the slip phenomenon. In
general, the greater the preload, the better the stiffness and the
accuracy of the rotation; but on the other hand, the greater the
preload, the higher the temperature rise, may cause burns, thereby
reducing the service life, or even not normal jobs. Therefore, according to the different speed and load the spindle to select the best load preload value.
Angular
contact ball bearings in the high-speed rotation, the ball will have a
lot of centrifugal force and gyro moment, this time the centrifugal
force is much greater than the role of the ball to the force when
cutting, so the main parameters of the bearing design is no longer the
work load, but should be Rotating speed. In order to solve the high-speed rotation of the centrifugal force
problem, for the rolling bearing itself, you can take the following
measures:
(1) to minimize the ball diameter, that is, to reduce the radial size of the ball;
(2) the use of small density sintering Si3N4 ceramic material to produce the ball, that is, to reduce the ball quality. Si3N4
ceramic material has the advantages of small density, large elastic
modulus, small thermal expansion coefficient, high temperature
resistance, nonconductive, non-magnetic and thermal conductivity. At present with hot pressing Si3N4 ceramic ball, roller is still
bearing steel, this bearing is called mixed ceramic ball bearings.
Jintai
decades of accumulated experience, ceramic ball bearing production
technology has been quite mature, the use of imported ceramic ball,
bearing life far more than domestic counterparts, has been recognized by
many domestic host companies and long-term support, is the high-end CNC
machine tools , Engraving machine and other equipment perfect partner.
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- ADD: No.503,Hunan International Commerce Center, Jintai Square,Changsha 410001,Hunan
- TEL: 86-731-84770165
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- E-mail: sales4@@slide-bearing.com
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