Date: 2013-08-20

Selection of SKF bearings to know basic knowledge

1, the choice of bearing type: the bearing designation is generally determined by the user's technical staff according to the conditions of use of supporting products and choose load for SKF bearings. Business personnel are mainly about user load is consistent with the selected bearing, if the bearing does not meet the requirements, you should advise the customer as soon as possible the options model, but unless special products generally do not have problems in the selected model.
2, selection of bearing clearance: when users buy SKF bearings generally will only inform on what type, grade, rarely claim on bearing clearance, business people must ask bearing conditions of use, speed, temperature, combined with tolerance of the bearing of which are directly related to the selection of bearing clearance. General below 3,500 rpm rotational speed of the motor they use CM clearance, such as high temperature and high speed motor requires a relatively large clearance. Bearing clearance after Assembly is large and cylindrical hole up in narrow and lead to a reduction, clearance reductions interference = x60% (except for the bearing housing is aluminum). Such as bearing clearance before Assembly is 0.01mm, Assembly interference of 0.01mm, the clearance of 0.004mm bearing Assembly. Zero clearance is in theory bearing in noise and life to achieve the best State, but in actual operation, taking into account issues such as temperature rise, SKF bearing clearance after Assembly is 0.002mm-0.004mm better.
3, selection of oils: oils are generally chosen on the basis of SKF bearing speed, temperature, noise requirements and starting torque of choice requires operational staff performance is understanding of various oils.
Selection of 4, bearing seal: SKF bearings can be divided into the lubricating oil and grease lubrication of lubrication. Oil-lubricated bearing selection form bearing, grease lubricated bearings are generally use rubber seals shields or seals. Shields for high temperature or use good parts, sealing-contact seals and two non-contact seal, contact sealed, dustproof performance is good but the torque, torque from the non-bonded seal is small, but good sealing properties of no-contact.

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