NSK bearings with clearance adjustment - bearing knowledge

Even the eyes can't see the little dust, also can bring bad influence to NSK bearing. So, keep the surrounding clean, dust from invading bearing. In use for bearing strong impact, will produce scar and creasing, become the cause of the accident. Severe cases, can crack, fracture, so must pay attention to. Avoid NSK bearings with existing workers to replace, must use the appropriate tools. We often stressed the importance of tools, because there are too many customers using the wrong tool in the installation of the bearing damage. In the shaft and bearing seat, bearing requirements in the radial, axial and tangential direction to three directions such as fixed position. Radial and tangential NSK bearing ring by the positioning of the tight fit of implementation, 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 bearing. ( 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 the bearing installation and easy disassembly, saving time and expenses for the province. NSK bearings operating, hand sweat will become the cause of rust. Attention should be paid to operation with clean hands, best gloves as far as possible. Is the life of the bearing with maintenance and maintenance has a very important relationship, because it is related to the length of the bearing life, high and low working efficiency. NSK bearings used by the maintenance of good, can bring many benefits, such as can lead to high production efficiency, produce higher quality precision products several times maintenance can prolong life save you time to purchasing cost. 1 adjusting shim method: in the bearing cover and bearing seat face between placing a set of soft materials ( Mild steel or elastic paper) Gasket; When adjustment, not first spacer on bearing end cover, a evenly tighten the screw on the bearing end cover, a rotating shaft with the hand, until the rolling element bearing contact with the outer ring and axial internal clearance so far; When measuring the bearing cover and bearing gap between end face, plus the NSK bearings in normal work required by the axial clearance; This is required to fill in spacer thickness, and then fill in the bearing cover and gasket prepared between bearing end face, finally tighten the screws. 2 adjusting bolt method: press the circle on the bearing's outer ring, pressurized with adjusting bolts; Before the pressure adjustment, first of all to measure adjustment bolt pitch, then adjust the bolt tightening slowly, until the bearing internal no clearance, and then calculate the adjustment bolt corresponding rotation Angle. For example, pitch to 1. 5 mm, bearing clearance required for normal operation, then adjust the bolt required rotation Angle of 3600 * 0. 15／l. 5 = 360; At this time the adjustment bolt reverse 360, NSK bearings was 0. 5 mm axial clearance, and then use gaskets to be fixed can stop. Flow is lubricated by grease bearing should be replaced after running 1500 hours, grease filling amount of oil in moderation, because too much or too little will cause bearing grease fever, amount to general in bearing chamber volume 1/2 ~ 2/3 is advisable. However, for NSK bearings used lubricating oil, oil should be added to the location of the corresponding provisions;