- Hello Customer - Log in or Register!
KOYO bearings are easily mounted to the rotor dynamic balance when the dynamic balance of iron filings into the bearing, so it is best to install thrust ball bearing of dynamic balance. Some manufacturers in order to convenient assembly, the assembly of some oil or grease lubrication effect in the bearing chamber painted, but the operation is often difficult to control, if the oil or grease in the bearing chamber accumulates more, in the bearing rotates easily along the shaft into the interior of the rolling bearing. KOYO bearing is best not to oil or grease, such as the non coated not to control shall not be in the bearing chamber of accumulation.
KOYO bearings are generally equal to rolling road sound with other sounds. Ball bearing raceway is irregular, frequencies above 1000Hz, the frequency rate does not change with the speed of it, but its sound pressure level increases with acceleration of the speed. Raceway bearing large, the raceway acoustic sound pressure level decreases with the increase of viscosity and rolling bearing; say small, the sound pressure level in the viscosity increases to about 20mm2/s above, by a reduction to increase. Bearing large rigidity, rolling road sound of a sound pressure level is lower. Such as the radial clearance is too small, reduce rolling road sound of a sound pressure level and main frequency with radial clearance increases. Control of raceway acoustic methods are: selection of low noise KOYO bearings, thrust ball bearings which waviness small, carefully choose to use the premises. Rolling road sound often affects the entire mechanical noise, reduce rolling road sound can reduce the noise of the whole machine.
Percussive sound body and its control method of a large model of ball bearings or cylindrical roller bearing KOYO low speed operation in the pure radial load, because move smaller centrifugal force, in a move will impact non load area of the roll cage or road noise. But with the speed of progress, the noise will disappear. The control method of moving projectile impact sound: appropriate reduction of radial clearance, with reasonable structure and materials keep thrust ball bearing frame compliance.
Creak and control method for KOYO bearings creak metal friction sound cylindrical roller bearings are likely to occur in all occasions, harsh, mostly in the larger models grease lubricated bearings, while in the grease base oil performance optimization more often, rarely occurs in oil lubrication. In addition, the more vulnerable in the winter, when under purely radial load, prone to big occasions in a radial clearance, and with different model sizes, easy to occur at a certain speed range, both continuous and intermittent thrown. Take special processing methods on the outer ring raceway can prevent the creak of the appearing, select the KOYO bearings if necessary, or appropriate reduction of radial clearance of the United States of America thrust ball bearings, the use of high-performance grease and progress of rigidity of bearing matching parts.
Paint rust is characterized by multiple motor sealed, motor sound in the assembly is very good, but in the warehouse put some time later, motor noise becomes large, remove the KOYO bearings with serious rust. Many manufacturers will be considered to be the United States of America thrust ball bearing problem, after continuous publicity our, motor factory is now aware of the problem is the main insulating paint. The problem is mainly because the acidic material insulating paint volatile out the formation of corrosive substances under certain temperature, humidity, the bearing channel after corrosion cause bearing damage. The problem can only be good choice of insulating varnish, and after drying in air for a period of time after the assembly.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7919A5DF NSK | 95 | 130 | 18 |
| 7318BDF NSK | 90 | 190 | 43 |