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First noise associated with the bearing manufacturing: here include noise and vibrato holder retainer noise occurs mainly in the ball bearings and tapered roller bearings, when the combination of bearing rotation due to the vibration of the holder, and the holding frame with the rolling body collide will sound. this sound cyclical vibrato (bearings) have a certain frequency sound, is generated due to the raceway surface with large waviness vibrations caused a phenomenon that is the most common future we need to pay a lot of attention before. In particular, we are learning some the INA Bearing knowledge of students who, to carefully look at these key content, may be that some help.
Second caused by improper use of the noise: for the various bearings are present, it will produce the noise and vibration of a certain cycle when the bearing raceway surface or rolling surface by the bumps, indentations, rust when the bearing in operation dirt noise is generated when the dust intrusion. noise is aperiodic, also accompanied by vibration, the sound is not fixed in size, sometimes no.
The third inherent noise: the sound of the raceway and the various bearings and rolling friction sound rolling bearing inherent sound the raceways sound generated by the elastic properties of the rolling element and raceway contact, when the combination of bearing rotation, rolling element roll trail rolling emitted a continuous and smooth sound; abnormal sound of rolling friction may issue a "creak, creak like uncomfortable metal friction unusual sound, good lubrication will not issue such a sound so general the next is not a problem, only the noise increases should pay attention to.
The INA bearings installed in the host, such as measuring a combination of radial bearing spindle runout, can be found in each of its transfer of measured values have some changes; continuous measurement can be found after a certain number of revolutions, this change will approximately repeated. The cycle rotation accuracy, changes approximately repeated quasi-periodic representative of the number of revolutions required cycle rotation accuracy, the magnitude of the change in the quasi-periodic amplitude indicators measure the extent of this change is cyclic rotation accuracy .
Be a proper pre-load bearing spindle speed gradually increased to close to operating speed, in order to implement the "run-in" effect of the bearing, can increase the cycle of the spindle rotation accuracy.
Measuring the size of the shaft and the bearing hole to determine the combination bearings with accuracy, with the following requirements: take the inner ring and the shaft interference fit, the amount of interference 0 ~ +4 μm (at light load, high-precision, 0); outside the circle bearing hole to take the gap with the amount of backlash 0 ~ +6 μm (but in the free end bearings angular contact ball bearings, but also increases the gap); surface of shaft and housing bore roundness error of less than 2μm, the bearings are used every parallel to the end face of the ring of the degree of 2μm or less, the shaft shoulder faces the external end of the beating of 2μm or less; retaining shoulder of the bearing hole on the axis of the beating in a 4μm or less; inner end face of the front cover in the spindle axis of beating in the 4μm.
Organic solvent into the fixed end bearings on the shaft before installation: INA Bearing cleaning with clean kerosene thorough cleaning of 3% to 5%, the first containing grease for grease lubrication bearing for degreasing and cleaning, oil gun fill in the quantitative grease bearing (accounting for 10% to 15% of the bearing space volume); 20 to 30 ℃ heating combination bearings make warming, oil press bearing onto the shaft; tight sets against the shaft and appropriate pressure withstood end bearings axially positioned; spring scale tape volumes in the bearing outer ring, with a measurement method of starting torque check under preload whether substantial changes (even if the bearings are correct, However, due to the fitting or deformation of the holder, the pre-load also changes may
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 4T-25590/25526 NTN | 45.618 | 85 | 25.4 |
| 4T-25590/25522 NTN | 45.618 | 83.058 | 25.4 |