How to choose the timken cylindrical roller bearing and cooperate with the assembly quality analysis of technology

Check the parts look first, and then clean, wipe, ready to before assembly. Next to the ring raceway thickness deviation separation, separation will be inside or outside ring positioning, record results are numbered. Simultaneously measure the inner ring width in parts factory with actual size deviation, measuring inner diameter size and note the actual deviation on the ring. 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 timken bearings, 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. 2, 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 timken bearing conditions of use, which the bearing rotating 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, cylindrical roller 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. 3, the choice of grease: the choice of grease are generally according to the situation of timken bearing rotating speed, heat resistance, noise and the starting torque choice, for business personnel to the performance of a variety of oils and fats to be understand. 4, the choice of bearing seal type: cylindrical roller bearing can be divided into oil lubrication and grease lubrication. Oil lubricated bearing is generally choose form of bearing, grease lubricated 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. Bearing assembly to control the height of the bearing. So as long as the axial circle or raceway groove height of the seat in the process ask guaranteed, bearing assembly without matching, can be arbitrary assembly, at the same time satisfy the separable bearing can swap request of the separate parts. To ensure that the contact Angle tolerance range, these are not the parts processing and inspection. When the requirements parts guaranteed, bearing assembly process is simple and smooth, which is why the thrust bearing in the precision of parts inspection instead of a finished product. Timken bearing of separable pieces more, need to keep common medium and small sized frame and steel ball form components, which requires the assembly of steel ball and cage for pressing, pressing way associated with the type of cage. For oversize bearings, some cage can not pressing, all parts are separable, packing materials and cylindrical roller bearing should be complete when tightly. Two-way bearing with single bearing all the components of the part is very strong, processing equipment and tooling are consistent, when need can be ear in assembling, it is also bearing a hold point. Differences and bearing assembly process.