ANSI ABMA 10A-2001 Metal Balls for Unground Bearings and Other Uses《地下轴承和其它用途的金属珠》.pdf
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1、 Metal Balls for Unground Bearings and Other Uses ANSI/ABMA 10A:2001 (R2015) ANSI/ABMA 21.2:1988 (Stabilized Maintenance 2010) Secretariat American Bearing Manufacturers Association ANSI/ABMA 10A:2001 (R2015) Accredited Standards Committee B3 AMERICAN NATIONAL STANDARD (This is not an approved part
2、of the standard) Approval of an American National Standard requires verification by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus means substantial agreement has been reached by directly and materially affec
3、ted interests. This signifies the concurrence of more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that an effort be made toward their resolution. The use of an American National Standard is completely voluntary; their exi
4、stence does not in any respect preclude anyone, whether they approved the standard or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standard. The American National Standards Institute does not develop standards and will in no circum
5、stances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name of the American National Standards Institute. Requests for interpretations should be addressed to the secret
6、ariat of the sponsor whose name appears on the title page of this standard. CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National
7、Standards Institute or online at www.ANSI.org. Published by American Bearing Manufacturers Association 2025 M Street, N.W., Suite 800 Washington, DC 20036 Copyright 2015 by American Bearing Manufacturers Association All rights reserved. No part of this publication may be reproduced in any form, in a
8、n electronic retrieval system or otherwise, without prior written permission of the publisher. Printed in the United States of America 3 Metal Balls for Unground Bearings and Other Uses Contents Section Page 1. Scope 1 2. Normative references 1 3. Definitions and symbols 1 4. Requirements 4 4.1 Mate
9、rials . 4 4.2 Hardness . 4 4.3 Case depth 6 4.4 Quality of surface . 6 4.5 Geometric quality . 7 4.6 Corrosion resistance 8 5. Preferred nominal sizes by materials and grades 9 6. Quality assurance provisions . 12 7. Ordering specifications and package marking 13 Annexes (informational) A Measuremen
10、t of deviation from spherical form 15 B Recommended procedure for microhardness testing of small balls . 17 C Recommended procedure for measurement of case depth in carburized and hardened carbon steel balls 19 D Corrections for hardness readings taken on spherical surfaces 24 E Density, quantity an
11、d weight of common ball materials 25 List of tables . ii List of figures i List of Tables Table Description Page 1 Commonly used material specification reference chart 5 2 Case depth requirements for carbon steel balls 6 3 Tolerances by grade for individual balls 7 4 Tolerances by grade for lots of
12、balls 7 5 Preferred nominal ball sizes 10 6 Applicable inspection levels and acceptance quality level (AQL) 12 A1 Magnification factor 16 D1 Ball hardness corrections for curvatures 24 E1 Density of common ball materials . 25 E2 Number of balls 26 E3 Weight of balls 28 List of Figures Figure Title P
13、age 1 Variations in lot of Grade Gl0A balls 3 A1 Vee block . 16 B1 Recommended method of mounting miniature balls for microhardness testing 17 C1 Case depth microstructure examination . 21 C2 Case depth microhardness examination . 22 5 METAL BALLS FOR UNGROUND BEARINGS AND OTHER USES 1. Scope. This
14、standard establishes the requirements for metal balls for unground rolling contact bearings and other uses. The requirements for finished balls for roiling contact bearings are contained in ANSI/ABMA/ISO 3290. 2. Normative references. The following standards contain provisions, which through referen
15、ce in this text constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the sta
16、ndards below. ANSI B89.3.1-1972 (R1988), Out-Of Roundness, Measurement of ANSI/ASME B46.1-1995, Surface Texture (Surface Roughness, Waviness and Lay) ANSI/ASQC Z1.4- 1993, Sampling Procedures and Tables for Inspection by Attributes ASTM E 18-98, Test Methods for Rockwell Hardness and Rockwell Superf
17、icial Hardness of Metallic Materials ASTM E140-97e1, Hardness Conversion Tables for Metals (Relationship Between Brinell Hardness, Vickers Hardness, Rockwell Hardness, Rockwell Superficial Hardness, Knoop Hardness and Scleroscope Hardness) ASTM E384-89 (1997), Standard Test Method for Microhardness
18、of Materials Federal Specification GGG-G-15C (March 20, 1975), Gage Blocks and Accessories (Inch and Metric) ISO 3290: 1998, Rolling bearings - Balls - Dimensions and Hardness ISO 4288: 1996, Geometrical Product Specifications (GPS) - Surface texture: Profile method - Rules and procedures for the as
19、sessment of surface texture ISO 4291: 1985, Methods for the assessment of departure from roundness - Measurement of variations in radius ISO 6508-1: 1999, Metallic materials - Hardness test - Rockwell test (scales A B - C - D - E - F - G - H - K) 3. Definitions and symbols. The following definitions
20、 and symbols will apply to terms used in this standard. 3.1 Nominal ball diameter, Dw. The diameter value that is used for the purpose of general identification of a ball size; e.g., 1/4 inch, 6 mm, etc. 3.2 Single ball diameter, Dws. The distance between two parallel planes tangent to the surface o
21、f a ball. 3.3 Mean ball diameter, Dwm. Arithmetic mean of the largest and the smallest of the single diameters of a ball. 3.4 Variation of ball diameter, VDws. Difference between the largest and the smallest of the single diameters of a ball. VDws = Dws max Dws min 3.5 Deviation from spherical form,
22、 Rw. The greatest radial distance, in any equatorial radial plane, between the smallest circumscribed sphere and the greatest inscribed sphere with their center common to the least square sphere center. 7 Rw = Re Rx 3.6 Ball lot. Definite quantity of balls manufactured under conditions presumed unif
23、orm and which is considered as an entity. 3.7 Mean diameter of a ball lot, DwmL (see figure 1). Arithmetic mean of the mean diameters of the largest ball and the smallest ball in a ball lot. 3.8 Variation of ball lot diameter, VDwL (see figure 1). Difference between the mean diameters of the largest
24、 ball and the smallest ball in a ball lot. VDwL = Dwm max Dwm min Figure 1-1 - Variation in lot of Grade 10A balls (Metric dimensions) Figure 1-2 - Variation in lot of Grade 10A balls (Inch dimensions) 3.9 Nominal ball diameter tolerance. The maximum allowable deviation of any ball lot mean diameter
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