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ABMA: American Bearing Manufacturers Association

ABMA, the American Bearing Manufacturers Association, is a nonprofit organization that develops and publishes standards for all aspects of the bearing industry. Headquartered in Washington, D.C., United States, ABMA standards are used throughout the United States and, through its 28 member companies, represent approximately 80% of all American bearing production. ABMA also serves as the administrator for the U.S. TAGs (United States Technical Advisory Group) to ISO/TC 4 (International Organization for Standardization/Technical Committee) and to all of its subcommittees. Standards from ABMA-bearing are available both individually, directly through the ANSI webstore, and as part of a Standards Subscription. If you or your organization are interested in easy, managed, online access to standards that can be shared, a Standards Subscription may be what you need - please contact us at: StandardsSubscriptions@ansi.org or 1-212-642-4980 or Request Proposal Price.

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ANSI/ABMA 8.2-1999 (S2020)

Ball and Roller Bearing Mounting Accessories - Inch Design

Mounting accessories covered in this standard are commonly used for the location or fixing of ball and roller bearings to the shaft of a machine or mechanism. The purpose of the standard is to establish dimensions and minimum physical properties of these components consistent and compatible with ABMA and ANSI Standards relating to ball and roller bearings. Products manufactured in accordance with this standard will fulfill the expected function when used with properly-designed shafts. This standard covers: 1.1 Locknuts and removal nuts - Locknuts and removal nuts for ball bearings, cylindrical, spherical, and tapered roller bearings. 1.2 Locking devices - Lockwashers and lockplates for ball bearings, cylindrical, spherical and tapered roller bearings. 1.3 Mounting sleeves - Adapter sleeves and withdrawal sleeves, for ball bearings and spherical roller bearings. 1.4 Shaft dimensions - Required dimensions for threads, keyways, and reliefs for shafts. 1.5 General information - Symbols, definitions, part numbers, materials, tolerances, and threads.


ANSI/ABMA 9-2015 (R2020)

Load Ratings and Fatigue Life for Ball Bearings

Ball bearing performance is a function of many variables. These include the bearing design, the characteristics of the material from which the bearings are made, the way in which they are manufactured, as well as many variables associated with their application. The only sure way to establish the satisfactory operation of a bearing selected for a specific application is by actual performance in the application. As this is often impractical, another basis is required to estimate the suitability of a particular bearing for a given application. This is the purpose of this standard. This standard specifies the method of calculating the basic dynamic load rating of rolling bearings within the size ranges shown in the relevant ANSI/ABMA standards, manufactured from contemporary, commonly used, good quality hardened bearing steel in accordance with good manufacturing practice and basically of conventional design as regards the shape of rolling contact surfaces. This standard also specifies the method of calculating the basic rating life, which is the life associated with 90% reliability, with commonly used high quality material, good manufacturing quality and with conventional operating conditions. In addition, it specifies the method of calculating adjusted rating life, in which various reliabilities, special bearing properties and specific operating conditions are taken into account by means of life adjustment factors. Furthermore, this standard specifies the method of calculating the basic static load rating and the static equivalent load for ball bearings within the size ranges shown in the relevant ANSI/ABMA Standards, manufactured from good quality hardened bearing steel, in accordance with good manufacturing practice and basically of conventional design as regards the shape of rolling contact surfaces.


ANSI/ABMA/ISO 3290-1-2014

Rolling Bearings - Balls - Part 1: Steel balls

This document, an adoption of ISO 3290-1:2008, specifies requirements for finished steel balls for rolling bearings.  



ANSI/ABMA 11-2014 (R2020)

Load Ratings and Fatigue Life for Roller Bearings

Roller bearing performance is a function of many variables. These include the bearing design, the characteristics of the material from which the bearings are made, the way in which they are manufactured, as well as many variables associated with their application. The only sure way to establish the satisfactory operation of a bearing selected for a specific application is by actual performance in the application. As this is often impractical, another basis is required to estimate the suitability of a particular bearing for a given application. This is the purpose of this standard. This standard specifies the method of calculating the basic dynamic load rating of rolling bearings within the size ranges shown in the relevant ANSI/ABMA standards, manufactured from contemporary, commonly used, good quality hardened bearing steel in accordance with good manufacturing practice and basically of conventional design as regards the shape of rolling contact surfaces. This standard also specifies the method of calculating the basic rating life, which is the life associated with 90% reliability, with commonly used high quality material, good manufacturing quality and with conventional operating conditions. In addition, it specifies the method of calculating adjusted rating life, in which various reliabilities, special bearing properties and specific operating conditions are taken into account by means of life adjustment factors. Furthermore, this standard specifies the method of calculating the basic static load rating and the static equivalent load for roller bearings within the size ranges shown in the relevant ANSI/ABMA Standards, manufactured from good quality hardened bearing steel, in accordance with good manufacturing practice and basically of conventional design as regards the shape of rolling contact surfaces.


ANSI/ABMA 12.1-1992 (S2020)

Instrument Ball Bearings Metric Design

This standard covers the characteristics that define metric design instrument ball bearings, their boundary dimensions, tolerances, internal clearances, classification for selective assembly, and recommended practices for gaging, friction torque determination, load rating, operational life prediction and yield rate limitation. The standard applies only to the size ranges covered by Paragraph 4, Boundary Dimensions.


ANSI/ABMA 18.2-1982 (S2013)

Needle Roller Bearings Radial Inch Designá

This standard for Inch Design Industrial Radial Needle Roller Bearings and components includes: identification code, boundary dimensions, bearing tolerances, and fitting and mounting practice.


ANSI/ABMA 19.2-2013 (R2020)

Tapered Roller Bearings - Radial Inch Design

This standard covers inch design radial tapered roller bearings of various types, part numbering systems, boundary dimensions, tolerances, and fitting practices. Tapered roller thrust bearings are covered in a separate ABMA standard. General ABMA standards which apply to various types of bearings should be consulted for tolerance definitions, gauging practices, mounting accessories, and method of evaluating load ratings.


ANSI/ABMA 12.2-1992 (S2020)

Instrument Ball Bearings Metric Design

This standard covers the characteristics that define metric design instrument ball bearings, their boundary dimensions, tolerances, internal clearances, classification for selective assembly, and recommended practices for gaging, friction torque determination, load rating, operational life prediction and yield rate limitation. The standard applies only to the size ranges covered by Paragraph 4, Boundary Dimensions.



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