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31:. The ABEC scale is designed to provide bearing manufacturers dimensional specifications that meet the standards of precision bearings in a specified class. The scale is also used by manufacturers who produce equipment that require bearings must also know the dimensional tolerances to design parts that will accommodate a bearing.
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Outside the industrial uses mentioned, the scale may also works as a guide for consumers to make informed decisions about the type of bearing they desire. However, the ABEC scale itself does not inform anything about other critical factors related to materials, manufacturing, and performance.
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Often significant is also the maximum runout of the race on the inner ring, as this determines how far the axle may shift dynamically from its center position when rotating. For axle diameters between 1 and 18 mm, for the various ABEC classes, they are : ABEC1 : 10 um,
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The naming scheme is inverse with the tolerance, i.e. higher numbers means lower tolerance. The higher ABEC classes (lower tolerance) provide better precision, efficiency, and the possibility of greater speed capabilities, but do not necessarily allow the components to spin faster.
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hardness, degree of ball and raceway (cone) polishing, noise, vibration, and lubricant. Due to these factors, a high-quality ABEC 3 classified bearing could actually perform better than a lower-quality bearing which satisfies (the stricter) ABEC 7 requirement.
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Bearings which fulfill the least strict class (ABEC 1) can be referred to as "precision" (precise) bearings. Bearings not conforming to at least ABEC 1 cannot be classified as precision bearings because their tolerances are too loose.
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High ABEC-rated bearings are intended for precision applications such as aircraft instruments or surgical equipment. Lower graded bearings are intended for the vast majority of applications such as vehicles, mechanical hobbies,
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195:(Ξm) for a 20 mm inner diameter bearing. A 20 mm ABEC 7 bearing only has a 5 Ξm tolerance window, whereas an ABEC 1 has twice as wide a tolerance.
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The ABEC rating does not specify many critical factors, such as load handling capabilities, ball precision, materials, material
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ISO 492:2014 â Rolling bearings â Radial bearings â Geometrical product specifications (GPS) and tolerance values
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ABEC3 : 7 um, ABEC5 : 4 um, ABEC7 : 2.5 um, ABEC9 : 1.5 um .
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Illustration of bearing tolerances (in micrometers) for a bearing with a 20 mm inner diameter
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171:. High ABEC rated bearings allow optimal performance of critical applications requiring very high
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For illustration, the figure shows the differences in tolerance per ABEC class in
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It was developed by the
Annular Bearing Engineering Committee (ABEC) of the
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There are five classes, which are named using the first five odd numbers:
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211:(ISO) equivalent standard is ISO 492. The German equivalent is
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394:"General Bearing Technical Information - Technical Support"
383:. Minibearings.com.au. Retrieved on 2012-08-12.
209:International Organization for Standardization
371:. Iso.org (2014-09). Retrieved on 2017-10-11.
352:"Ball Bearings ABEC Standard Tolerances Data"
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85:. Unsourced material may be challenged and
41:American Bearing Manufacturers Association
105:Learn how and when to remove this message
23:is an industry accepted standard for the
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16:Industrial scale for bearing tolerance
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339:differences between the ABEC classes
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179:Illustration of bearing tolerances
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215:620. The Japanese equivalent is
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313:Weaknesses of the specification
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381:Bearing Precision Comparison
203:Correspondence with ISO 492
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403:2019-11-19
326:References
234:JIS B1514
25:tolerances
21:ABEC scale
244:class 6X
66:does not
418:Category
319:Rockwell
306:Class 2
300:class 2
292:Class 4
286:class 4
278:Class 5
272:class 5
264:Class 6
258:class 6
250:Class 0
231:DIN 620
228:ISO 492
43:(ABMA).
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35:History
297:ABEC 9
283:ABEC 7
269:ABEC 5
255:ABEC 3
242:normal
239:ABEC 1
225:ABEC
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217:JIS
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