Abec 1 Bearing

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What Are ABEC Ratings? | AST BearingsThere are five classes, going from widest tolerances to tightest: 1, 3, 5, 7, and 9. Higher ABEC classes provide better precision, efficiency, and greater speed Bearing Tolerances and Precision Levels | AST BearingsABMA standard 20 defines 5 classes: ABEC 1, ABEC 3, ABEC 5, ABEC 7, and ABEC 9. Instrument series ball bearings are defined in standards 12.1 and 12.2 
Levels of Precision - Choose Wisely: How Fast Your BearingsAug 24, 2015 - ABEC includes five tolerances classes: 1, 3, 5, 7, and 9 with 1 being the widest and 9 the tightest. Thus, bearings with a higher ABEC rating Ball Bearings ABEC Standard Tolerances Data - EngineersA ball bearing is a type of rolling-element bearing that uses balls to maintain the separation between the bearing races.  The purpose of a ball bearing is to reduce rotational friction and support radial and axial loads.  The ABEC scale is an industry accepted standard for the ABEC scale - WikipediaThe ABEC scale is an industry accepted standard for the tolerances of a ball bearing.  Bearings not conforming to at least ABEC 1 cannot be classified as precision bearings as their tolerances are too loose. The scale also works as a guide 
 

SKF Spherical Roller Bearing 22317 Cc ABEC-1

17000 29300
13 NU205EM

Flanged Miniature Deep Groove Ball Bearings Mf117zz, Mf137zz, F687zz, F697zz, F607zz, F627zz ABEC-1

Stainless Steel Yes
206 Series Normal Duty

High Quality Flanged Miniature Ball Bearings F685zz, F695zz, F605zz, F625zz, F635zz ABEC-1

Unirex N2 Rubberized
Steel Setscrew Ball Bearin

Miniature Ball Bearings 681zz, 682zz, 683zz, 684zz, 685zz, 686zz, 687zz, 688zz, 689zz ABEC-1, ABEC-3

4 Bolt Flange 215 SERIES (211 - 30
Steel Non-Expansion