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Selection and application of "high precision SKF imported bearings"

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1. Selection of high-precision bearings High-precision bearings refer to bearings with high rotation precision, high dimensional accuracy and low surface roughness; P4 grade and higher than P4 grade bearings in China's specifications; for example, P2 grade bearings are of high precision Bearings; this is generally appropriate with the US norms ABEC 7 and ABEC 9; and international norms ISO P4 and P2 are appropriate; international norms are confessed and selected by many countries; such as Japan; Germany and France.
After fine processing; all types of rolling bearings can reach high precision requirements; but the most used in high-precision bearings are angular touch ball bearings; and the main axis of metal cutting machine tools with high precision and high rigidity requirements There are also many double-row short cylindrical roller bearings; the second is tapered roller bearings.
At that time; because of the development of bearing processing skills; the international level of fine bearing practice products at all levels is mostly below 1/2 of the normative value; for example, the roundness of ball bearings for machine tools is 0.3 μm; and the top of the computer is 0. 25μm.
In general; when selecting a fine bearing for the user; it should be selected from the above three types first; and even in these three types; not every standard has fine products; it must also be in each Look for samples from bearing companies or production plants; or sell some inquiries to their bearings. General; P4 precision bearings are more readily available; and P2 precision bearings are mostly ordered. The first production of fine products is to be trial-produced. New product disposal.
2, the method of obtaining high-precision spindle support to obtain high-precision spindle support; in principle, it can be summarized as follows:
(1) Select high-precision bearings and improve their accuracy through the use of skills.
(2) Examining the application skills; for example, using the error cancellation method to improve the accuracy of the device; the smaller interference method to reduce the deformation of the raceway; adjusting the clearance method to improve the positioning accuracy and the inversion accuracy, etc.
(3) Eliminate the influencing factors that lead to the loss of bearing accuracy.

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