- Hello Customer - Log in or Register!
The nature of the bearing noise is that the use of modern processing technology to produce the bearings will still occur, SKF bearings its own decision on the structure of the noise.
Nature of the noise can be divided into raceway sound, rolling shock and jarring sound of three kinds of sound, as described below:
(A) the bearing raceway raceway sound and control the sound is running when the bearing, the rolling body raceway rolling issued a slippery continuous sound, all bearing the unique occur basic sound . Sound that is generally bearing raceway sound with other sounds. Ball bearing raceway sound is irregular frequencies above 1000Hz, its main frequency does not change with the speed, but the total sound pressure level increases with the speed acceleration. Bearing raceway loud, the sound pressure level of its raceway with the viscosity decreases with increasing; while the sound of a small roller bearings, and its level increased in viscosity to about 20mm2 / s or more, by reducing the transfer is somewhat increased.
Greater rigidity of bearing raceway total sound pressure level is lower. If the radial clearance is too small, the total sound pressure level raceway and the main frequency will decrease as the radial clearance increases dramatically.
Control raceway sound methods are: selection of low-noise FAG bearings that waviness small bearings, judicious selection of the conditions of use. Raceway sound often affect the entire mechanical noise reduction raceway sound can reduce the overall mechanical noise.
(2) the impact of rolling sound and control models of ball bearings or larger cylindrical roller bearings in pure radial load low speed, the centrifugal force due to rolling body is small, in a non-load zone of rolling element will Shock cage or raceway and noisy. However, as the speed increased, the sound will disappear. Impact on the rolling sound control methods are: appropriate to reduce the radial clearance, the use of reasonable structure supple material of the bearing cage.
(3) bearing jarring sound and control jarring sound is a cylindrical roller bearings on all occasions that may occur harsh sound of metal friction occurs mostly in grease lubricated bearings in larger models, and in the base oil properties more susceptible to deterioration of grease, oil lubrication in almost no time. In addition, more prone to winter, when subjected to pure radial load, radial clearance prone to big occasions, and with models of different sizes, at a particular speed range prone to both occur consecutively will appear intermittently. Outer ring raceway take special processing methods to prevent the emergence of creaking, if necessary, use this bearing, NSK Bearings or appropriate to reduce the radial clearance, the use of excellent performance match with the bearing grease and improve parts of the rigidity.
Bearing raceway raceway sound and control the sound is running when the bearing, its rolling body raceway rolling issued a slippery continuous sound, all bearing the unique occur basic sound. Sound that is generally bearing raceway sound with other sounds. Ball bearing raceway sound is irregular frequencies above 1000Hz, its main frequency does not change with the speed, but the total sound pressure level increases with the speed acceleration. Bearing raceway loud, the sound pressure level of its raceway with the viscosity decreases with increasing; while the sound of a small roller TIMKEN bearings, its level increased in viscosity to about 20mm2 / s or more, by reducing the to be increased. Greater rigidity of bearing raceway total sound pressure level is lower. If the radial clearance is too small, the total sound pressure level raceway and the main frequency will decrease as the radial clearance increases dramatically. Control raceway sound methods are: selection of low-noise bearings that waviness small bearings, judicious selection of the conditions of use. Raceway sound often affect the entire mechanical noise reduction raceway sound can reduce the overall mechanical noise.
Rolling sound and control the impact of the larger models of ball bearings or cylindrical roller bearings in pure radial load low speed, the centrifugal force due to rolling body is small, in a non-load zone of rolling element cage will impact or raceway and noisy. However, as the speed increased, the sound will disappear. Impact on the rolling sound control methods are: appropriate to reduce the radial clearance, the use of reasonable structure supple material of the bearing cage.
Bearing jarring sound and control jarring sound is a cylindrical roller bearings on all occasions that may occur harsh sound of metal friction occurs mostly in grease lubricated bearings in larger models, while in the performance degradation of lubricating base oil tallow more likely, in almost no oil lubrication. In addition, more prone to winter, when subjected to pure radial load, radial clearance prone to big occasions, and with models of different sizes, at a particular speed range prone to both occur consecutively will appear intermittently. Outer ring raceway take special processing methods to prevent the emergence of creaking, if necessary, use this bearing, INA bearings or appropriate to reduce the radial clearance, excellent performance and bearing greases and improve parts of the match rigidity.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7330ADB NSK | 150 | 320 | 65 |
| 7230BDB NSK | 150 | 270 | 45 |