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The strengths of fine ceramic bearings
Source: China Bearing Network Time: 2018-07-07
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1, excellent high-speed function because silicon nitride ceramic ball as long as 42% of the same volume of steel ball; under high-speed operating conditions; will greatly reduce centrifugal force and gyro torque; then reduce contact stress; reduce conflict power consumption; Limit speed and service life.
2, the use of long life in addition to the density of small decline conflict power consumption progress life; silicon nitride ceramic ball rolling ratio is larger than steel ball; that is, sliding. Maid. And the linear expansion coefficient of silicon nitride ceramic ball as long as the steel ball 29%; preload can be reduced. 庋布跣×宋律. The temperature rise and decrease in bearing operation. Disaster.
3. The elastic modulus of high-strength silicon nitride ceramic material is 1.5 times that of bearing steel; the use of fine ceramic bearings can greatly improve the rigidity of the spindle system; therefore, the fine ceramic bearing is uniquely applicable to machine tool spindles and electric spindles.
4. Sintering resistance The silicon nitride ceramic ball loses its smoothness in a short time; it does not have the appearance of sintering with the ferrule; it can continue to work after smooth recovery. This will improve the reliability of the bearing; together with the equipment reliability.
5. Insulating silicon nitride ceramic materials are non-magnetic and insulating. Fine ceramic bearings are used for electric spindles; eddy current loss will be reduced; and bearing life will be improved.
6, high-precision ceramic ball silicon nitride ceramic material, although difficult to process; but the processability is very good; can be processed to higher precision. Dayou company can be 1 / 8" (3. 175mm) ~ 1-1/4 "The ceramic balls between (31.750mm) are processed to the G3 level; the spherical error is the best at 0. 04μm; the surface roughness Ra is up to 0. 007μm. The progress of the ceramic ball is improved; accordingly, the progress is also improved. The bearing life.
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