INA bearing assembly considerations

Bearing use factors mainly refers to install, use, maintenance, maintenance, repair and so on meets the technical requirements. According to INA bearing installation, use, maintenance, maintenance of technical requirements, the operation of the INA bearing on the load, speed, temperature, vibration, noise and lubrication condition monitoring and inspection, found that abnormal immediately to find the reason, adjustment, so that it is back to normal. Installation condition is one of the primary factor of use factor, bearing is often caused by improper installation of a complete set of change the stress of bearing between various parts, bearing in the abnormal state of operation and the service life of the early end internal factors mainly refers to the structure design, manufacturing process and material quality and so on three major factors in determining the quality of bearing. 1, the selection of the bearing clearance: user when buying bearings generally just let us know in what type, grade, rarely on bearing clearance request, business people must ask INA bearing conditions of use, which the INA bearing speed, temperature, fit tolerance are directly related to the selection of the bearing clearance. Generally under 3500 RPM speed motor mostly adopts CM clearance, such as high temperature and high speed motor, require the use of relatively large clearance. Bearing clearance after assembly will rise because of the inner hole and cylindrical reduction and lead to reduce, the reduction of clearance = interference quantity x 60% ( Except the bearing chamber is aluminum) 。 Such as bearing clearance is zero before assembly. 01 mm, interference when assembling the quantity to zero. 01 mm, bearing assembly after the clearance of 0. 004mm。 In theory at zero clearance noise and bearing life can reach the best state, but in actual operation considering the problems such as temperature, bearing clearance to 0 after assembly. 002mm- 0. 004 mm is better. 2, grease choice: the choice of grease is generally according to INA bearing rotating speed, heat resistance, noise requirements and starting torque, etc, to choose, for business people to know a lot about the performance of all kinds of grease. 3, bearing type selection, bearing type is commonly used by the user's technical personnel according to the product of form a complete set of conditions and the load of INA bearings. Business people mainly learn the user's actual load is consistent with the selected bearing, if use of cylindrical roller bearing short of asks, should suggest customer re-election model as soon as possible, but unless special products on the choice models generally do not have what problem. 4, the choice of bearing seal type: INA bearing lubrication can be divided into oil and grease. Oil lubricated bearing is generally choose form of bearing, grease lubrication INA bearings generally choose dust cover or rubber seal seal. Dust cover suitable for high temperature or the use of good parts, seal two points contact seal and non-contact seal and contact seal dustproof performance is good but the starting torque, the sealing type starting torque is small, but there is no contact sealing performance is good. Remove bearing: the roots of INA bearings installed in the steering knuckle axis, difficult to break out, the main is not convenient to operate, can use the special pull, can easily down. Will pull with two conical inside round a condom, bearing, tighten the bolt, then use to thresh ring will be snared and make its cannot be opened, and then turn the handle, make the screw top hole in the center of the steering knuckle side, continue to handle clockwise rotation, the bearing can be pulled out. Using old leaf spring: on the old leaf spring length is appropriate, in accordance with the center distance of tyre nut with acetylene cutting cut two slightly larger than the tyre nut of the diameter of the hole, the leaf spring concave outwards, in turn to the side before screwed into the nut and end flush, in order to protect the steering knuckle threads, between the leaf spring and the steering knuckle fill with the thickness of the block, and tighten the two tire pressure on the steel plate spring nut, use of the elasticity of the leaf spring, but it will not be too tight mill bearing pull outward. If still not bottom bearing, but several times in the central leaf spring hammer, shaking force, then screw nut. 1. Remove before making clear the relationship between INA bearings and related parts: look carefully bearing location relationship with associated parts, analysis of the installation process and method, and then make a sealed, methods and procedures. 2. Can not sealed, try not to hurt: separation of bearing, inside and outside are usually USES the interference fit, in order to ensure its accuracy, shorten the repair time limit for a project, and can not try not to hurt. 3. The removal of adopting scientific methods: ( 1) Remove the shaft neck, should power works in the inner ring, remove the bearing of rolling mill bearing should work in the inner ring. ( 2) Remove the bearing inner ring or outer ring, the force should be balanced, even, not skewed, in case the card dead. ( 3) Removing INA bearings, broken items must not be used as tap, must be removed with pressure discharge or using special tool to remove, the individual is also available copper bar or other soft metal liner struck.