Date: 2013-08-20

How to choose a bearing and meet the changing needs of the

1, the choice of bearing type: General the bearing designation is determined by the user's technical staff according to the conditions of use of products to choose and load bearing. Business personnel to understand users and the actual load of the selected bearing in line if the bearing does not meet the requirements, should advise the customer to model the election as soon as possible, but unless special products on select models, generally do not have any problems.
2, bearing clearance option: users at the time of purchase bearing usually only inform on what model, grade and rarely claim on bearing clearance, business people must ask the bearings use conditions, which speed, temperature of the bearings, the fit tolerance is directly related to the choice of bearing clearance. General below 3,500 rpm rotational speed of motors mostly CM clearance, such as high temperature and high speed motor requires a relatively large clearance. Bearing clearance after Assembly as large and cylindrical hole up in narrow and lead to a reduction, clearance reduction = the degree of interference of x60% (except for the bearing housing is aluminum). Like bearing clearance before 0.01mm, Assembly interference of 0.01mm, the bearing clearance for 0.004mm. Bearing noise when the zero-clearance in theory and life are the best State, taking into account issues such as temperature rise in the actual operation, bearing clearance after Assembly is 0.002mm-0.004mm better.
3, choice of oils: oil is generally chosen is based on speed, temperature of the bearings, noise requirements and select terms of starting torque, required business performance is understanding of various oils.
4, selection of bearing type a, b, c: lubrication of the bearings can be divided into oil and grease lubrication. Oil-lubricated bearings are generally is the choice of bearings, grease-lubricated bearings are generally use shields or rubber seal seals. Dust cover for high temperature or use the good parts, seals-contact and non-contact sealed type sealed two-contact sealing, dustproof performance torque much better, non-regulated braking torque is small, but had no contact with good sealing performance.
Selection of fit
For dimension of inner diameter and outer diameter of the bearing size is based on the standard manufacturing tolerances, bearing inner ring and shaft, outer ring and block bore with the tightness can be achieved only through control of tolerances for shaft and housing bore tolerances to achieve. Meet the base of the bearing inner ring and shaft hole, used in conjunction with holes in the outer ring of the bearing shaft.
Tie is correctly selected, you must know the actual load bearing conditions, temperatures and other requirements, but in fact is very difficult. Therefore, in most cases is selected based on using an expert tie.
Load size
Amount of WINS between ring and shaft or housing depends on the size of load, heavy load of larger amount of WINS, lesser amount of load smaller WINS.

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