Simple selection and use of SKF sliding thrust bearing test technical requirements

SKF bearing is widely used now, but the problem really is more than the standard bearing, especially on the choice of bearing type. For general machine tools, the life of the spindle components is mainly refers to the use of the term to keep the spindle precision, thus, the precision of the bearing is asked to keep the performance to meet the requirements of the spindle component life. For heavy duty machine tools or strong cutting machine, should first consider the bearing capacity of the thrust bearing. SKF bearing make precision parts, thus a prudent attitude when use requirements accordingly, already became using high-performance bearing, if use undeserved, also cannot achieve the expected performance effect, so the use of bearings that should be paid attention to the following: 1, 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 bearing for selection. Business people mainly learn the user's actual load is consistent with the selected sliding thrust bearing, if bearing can not meet the use requirements, should suggest customer re-election model as soon as possible, but unless special products on the choice models generally do not have what problem. 2, the selection of the bearing clearance: user when buying SKF bearing generally just let us know in what type, grade, rarely on the clearance request, business people must ask bearing conditions of use, the thrust bearing of the rotational 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, thrust bearing clearance to 0 after assembly. 002mm- 0. 004 mm is better. 3, grease choice: the choice of grease are generally according to the situation of SKF bearing rotating speed, heat resistance, noise and the starting torque choice, for business people to know a lot about the performance of all kinds of grease. 4, the choice of bearing seal type: SKF bearing lubrication can be divided into oil and grease. Grease lubrication oil lubrication bearing is generally choose bearing, thrust bearing dust cover is generally selected 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.