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Bearing Class
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Many organizations have developed standards, including the American Bearing Manufacturers Association (ABMA), International Organization for Standardization (ISO) and the Deutsches Institut für Normung (DIN). ABEC and RBEC standards are defined by ABMA Standard 20. Similar standards are defined by ISO 492, JIS B1514 and DIN 620. ABEC bearing ratings were established by the Annular Bearing Engineering Committee (ABEC) of the American Bearing Manufacturers Association (ABMA). There are five classes of bearings in the ABEC rating system - 1, 3, 5, 7, and 9. The higher the ABEC rating, the tighter the tolerances and the higher the bearing precision. ABEC 1 bearings are designed for use in lower speed and accuracy applications. RBEC bearing ratings were established by the Roller Bearing Engineering Committee (RBEC) of the American Bearing Manufacturers Association (ABMA). There are five classes of bearings in the RBEC rating system - 1, 3, 5, 7, and 9. The higher the RBEC rating, the tighter the tolerances and the higher the bearing precision. RBEC ratings apply to cylindrical roller and spherical roller bearings. RBEC 1 bearings are designed for use in lower speed and accuracy applications. Although the specifications may differ slightly, the following equivalency can be made between ABMA, ISO and DIN bearing classes. ANSI Standard 20 / ISO 492 / DIN 620 ABEC 1 / Class Normal / P0 ABEC 3 / Class 6 / P6 ABEC 5 / Class 5 / P5 ABEC 7 / Class 4 / P4 ABEC 9 / Class 2 / P2
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Your choices are...
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Unground Bearing
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Unground bearings include bearings that are totally unground, partially unground and have precision levels less than ABEC 1.
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RBEC 1 / Class 0 / P0
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RBEC 1, Class 0 and P0 bearings are designed for use in lower speed and accuracy applications.
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RBEC 3 / Class 6 / P6
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RBEC 3, Class 6 and P6 bearings are designed for use in lower speed and accuracy applications.
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RBEC 5 / Class 5 / P5
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RBEC 5, Class 5 and P5 bearings are designed for use in higher speed and accuracy applications.
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RBEC 7 / Class 4 / P4
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RBEC 7, Class 4 and P4 bearings are designed for use in higher speed and accuracy applications.
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RBEC 9 / Class 2 / P2
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RBEC 9, Class 2 and P2 bearings are considered super precision and are designed for use in critical, high-tech applications.
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Other
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Other, unlisted quality rating.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Tables:
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| Bearing Standard | Tolerance Class | Bearing Types | | ABMA ANSI | ABMA/ANSI Std. 20 | ABEC-1 RBEC-1 | ABEC-3 RBEC-3 | ABEC-5 RBEC-5 | ABEC-7 | ABEC-9 | Radial bearings (except tapered roller bearings) | | ABMA/ANSI Std. 19.1 | Class K | Class N | Class C | Class B | Class A | Tapered roller bearings (Metric series) | | ANS B3.19 ABMA Std. 19 | Class 4 | Class 2 | Class 3 | Class 0 | Class 00 | Tapered roller bearings (Inch series) | | ABMA/ANSI Std. 12.1 | -- | Class 3P | Class 5P Class 5T | Class 7P Class 7T | Class 9P | Precision instrument ball bearings (Metric series) | | ABMA/ANSI Std. 12.2 | -- | Class 3P | Class 5P Class 5T | Class 7P Class 7T | Class 9P | Precision instrument ball bearings (Inch series) | | ISO | ISO 492 | Normal class Class 6X | Class 6 | Class 5 | Class 4 | Class 2 | Radial bearings | | ISO 199 | Normal class | Class 6 | Class 5 | Class 4 | -- | Thrust ball bearings | | ISO 578 | Class 4 | -- | Class 3 | Class 0 | Class 00 | Tapered roller bearings (Inch series) | | ISO 1224 | -- | -- | Class 5A | Class 4A | -- | Precision instrument bearings | | JIS | JIS B 1514 | Class 0 Class 6X | Class 6 | Class 5 | Class 4 | Class 2 | All types | | DIN | DIN 620 | P0 | P6 | P5 | P4 | P2 | All types | | ABMA - American Bearing Manufacturers Association (ABEC-Ball Bearings, RBEC-Roller Bearings) ANSI- American National Standards Institute ISO- International Organization for Standardization JIS- Japanese Industrial Standards DIN- Deutsch Industrie Norm |
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| Standard ABEC Tolerances Inner Rings (all tolerances in micrometers) | | Bearing Bore (mm) | Bore Diameter* +.00mm to | Width Variation | Radial Runout | Side Runout with Bore | Raceway Runout with Side | Width Inner & Outer Rings | | ABEC Rating | 1 | 3 | 5 | 7 | 9 | 3 | 5 | 7 | 9 | 1 | 3 | 5 | 7 | 9 | 3 | 5 | 7 | 9 | 3 | 5 | 7 | 9 | 1-3-5-7 | 9 | | 0 - 10 | -3 | -2 | -2 | -1.5 | -1 | 3 | 2 | 1 | .5 | 3 | 2 | 1.5 | 1 | .5 | 3 | 3 | 1 | .5 | 6 | 3 | 1 | .5 | -50 | -10 | | 10 - 18 | -3 | -2 | -2 | -1.5 | -1 | 4 | 2 | 1 | .5 | 4 | 3 | 1.5 | 1 | .5 | 4 | 3 | 1 | .5 | 6 | 3 | 1 | .5 | -50 | -20 |
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| Standard ABEC Tolerances Outer Rings (all tolerances in micrometers) | | Bearing O.D. (mm) | Outside Diameter* +.00mm to | Width Variation | Radial Runout | Raceway Runout with Side | Outside Diameter Runout with Side | | ABEC Rating | 1 | 3 | 5 | 7 | 9 | 3 | 5 | 7 | 9 | 1 | 3 | 5 | 7 | 9 | 3 | 5 | 7 | 9 | 3 | 5 | 7 | 9 | | 0 - 18 | -4 | -3 | -2 | -2 | -1 | 4 | 2 | 1 | .5 | 6 | 4 | 2 | 1.5 | .5 | 8 | 3 | 2 | .5 | 4 | 3 | 1.5 | .5 | | 18 - 30 | -4 | -3 | -2 | -2 | -1.5 | 4 | 2 | 1 | .5 | 6 | 4 | 2 | 1.5 | 1 | 8 | 3 | 2 | 1 | 4 | 3 | 1.5 | .5 |
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