Certain applications call for special tolerancing to ensure optimal performance, which WIB is accustomed to accommodating. Dimensions that fall outside international standard will be identified with a PA designation, which appears in the descriptions and drawings. Special PA tolerances may be combined with standard tolerances when one or more tolerances are not referenced in the standards. These tolerances are shown on the bearing drawings as well. This is primarily used for bearings with profiles. For example: P0/PA
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Packaging is a very important parameter for the retention of the bearing quality during transport and storage. It is designed to protect the bearings against corrosion, dust, and other pollutants. Apart from that, each unit is labeled and carries all the relevant information concerning the technical and quality features of the bearing. The production batch number is printed on the label and guarantees the traceability of the product, as well as the identification of the manufacturing date. Therefore, it is advisable to unpack the ball bearing only prior to use or assembly.
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The noise level is an important quality criteria of a ball bearing. It mainly depends on the following factors: precision of the geometric forms surface finish of the raceway and the balls cleanliness of the bearing type of lubricant type of cage rotational speed
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It is even possible to apply a coating on the outer ring, before assembling the bearing, thus guaranteeing the best possible geometrical forms. The machining of grooves ensures that the coating perfectly adheres to the metal surface. Additionally, a wider temperature range may be covered.
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By applying surface treatments on outer ring contact surfaces, it is possible to improve certain mechanical characteristics such as the hardness. By doing this, we can increase wear resistance while decreasing the friction coefficient. With certain treatments it is possible to achieve high resistance to specific chemical agents. The table below shows a small sample of examples of such surface treatments and their resulting technical characteristics.
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