Bearing ABEC parameters Raiders

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ABEC is what does that mean?
The ABEC standards for precision bearings used in the manufacturing tolerances to distinguish between the different levels and design a set of standard. This standard is developed by the American Bearing Manufacturers Association (ABMA) under Annular Bearing Engineering Association / Commission (abbreviation ABEC). American Bearing Manufacturers Association (ABMA), the predecessor of the lubricating bearings Manufacturers Association.stainless steel ball bearings
Bearing ABEC system is generally called precision bearings, numbered from 1-9, the higher the number of the higher level of precision bearing manufacturing. (Large = more narrow range of tolerance zone = more expensive price)
Tolerance zone is what does that mean?
Tolerance zone refers to a set used in the production process and absolutely accurate measurement of the size difference between the sequence. (Editor: Simply put, the narrower the tolerance band, the higher the precision necessary processing., Studied mechanical comrades ask if unclear.)
Other grade numbering system:
The ABEC just a method to bearing tolerance class definition. International Organization for Standardization (InternationalOrganizationforStandardization) and German Standards Organization (DIN) are also similar to the same standard to measure the accuracy of the bearing. ISO and DIN system, the smaller number means that the tolerance band, the narrower the higher the number means the wider the tolerance zone.
The standard specifies the size and running tolerances of the ball, and has nothing to do with the practical effects of the bearing. Important indicators for the materials, sealing, bearing frame, lubrication, friction tolerance at the same time did not make any provisions, the following conclusions can be seen from the standard is not necessarily correct: standard ABEC-7 bearings than standard bearing ABEC-1 transfer fast, use a long time, the standard ABEC-7 bearings certainly only use lubricants do not grease the the resin bearing frame than brass, and more brass than steel ... is a lis t of frequently asked ABEC standards common misunderstanding.
Is generally believed that the more important is the selection of the bearing brand, because the same parameters of the manufacturers, but the actual performance, but there are significant differences.the roller bearing company