Prevent deformation points for attention during the INA machine tool spindle bearings installed

Improper installation, improper installation may cause damage of INA bearings. Such as under the precondition of high speed operation and high working temperature, should pay special attention to the matching of the rotating ring is too loose, in order to prevent the eccentric on the vibration, and with the fixed ring not flush clearance, in order to prevent the ferrule deformation and vibration under load. The rotating ring burning interference quantity within may also should be made smaller. As long as to ensure that work under the temperature of thermal expansion effect, and under the maximum speed of centrifugal force effect, not cause peristalsis or sliding on the surface of the tight fit. Fixed ring size according to the size of the working load and spindle bearing, choose the smallest clearance fit or interference fit, too loose or too tight is unfavorable to keeping the original precise shape. Should not only precise calculation of rotating ring with the amount of interference, also to accurate calculation of the fixed ring with right quantity. Shaft and hole of the roundness and block shoulder perpendicularity to according to the corresponding precision of bearing requirements. Keep frame assembly accuracy by dedicated assembly is milled to assure, can ensure the accuracy of the INA bearing assembly requirement completely. For heavy load, usually should be lighter than the load and normal load situations fit as tight. The heavy load, the interference should be. Using pairs of machine tool spindle bearing of the spindle, for the most part load lighter, its interference such as large amount, the amount of axial preload is its internal obvious slants big, causing adverse effects. Sometimes the direction of the load and the size can't cut the local judge, for example in high-speed rotating machinery, in addition to the direction of the rotor weight under fixed load, and rotating load caused by uneven quality, if the load is much bigger than the fixed load rotation, the synthesis load is still rotating load; And if rotating load than fixed load, the synthetic load for oscillating load. Regardless of rotating load is oscillating load, machine tool spindle bearings are changing the size and direction. In variable work condition, some ring by load when possible but rotating load, but the fixed load, and the oscillating load. This load is called variable load. In the shaft and bearing, spindle bearing requirements in the radial, axial and tangential direction to three directions such as fixed position. Through the positioning of the radial and tangential the tight fit of bearing ring, the axial positioning only in a few cases with tight fit; Generally USES the axial spacing parts, such as end cover and retainer could happen on the axial location clearance range. Choosing cooperation should focus on the following four: ( 1) Bearing ring circumferential surface should have good bearing and force uniform, in order to reduce the deformation, and can give full play to the bearing capacity of the INA bearings. ( 2) Ring in its surface can't slide along the tangent direction, otherwise it will damage the mating surface. ( 3) Freedom end bearing must be able to adapt to changing with the length of the shaft and bearing seat holes, which must have to adapt to the axial location within a certain range of swimming ability. ( 4) Must pay attention to make the machine tool spindle bearing installation and easy disassembly, saving time and costs for the province. Operating INA bearings, hand sweat will become the cause of rust. Attention should be paid to operation with clean hands, best gloves as far as possible.