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1、a C Secretariat American Bearing Manufacturers Association Approved April 1, 1?8 1200 1 9 t h Street, NW Suite 300 Washington, DC 20036-2422 202-429-5155 202-223-4579 f a Approval of an American National Standard requires verification by ANSI that the requirements for due process, consensus, and oth
2、er criteria for approval have been met by the standards developer. Consensus is established when, in the judgment of the ANSI Board of Standards Review, substantial agreement has been reached by directly and materially affected interests. Substantial agreement means much more than a simple majority,
3、 but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made toward their resolution. The use of American National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approve
4、d the standards or not, from manufacturing, marketing, purchas- ing, or using products, processes, or procedures not conforming to the standards. The American National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard
5、. 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 secretariat or sponsor whose name appears on the title page of this st
6、andard. CAWON NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute require that action be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive c
7、urrent information on all standards by calling or writing the American National Standards Institute. Published by American Bearing Manufacturers Association 1200 19th Street, NW, Washington, DC 20036-2422 Copyright 0 1998 by American Bearing Manufacturers Association All rights reserved. No part of
8、this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without prior written permission of the publisher, Printed in the United States of America -,-,- ANSI/ABMA/ISO 3096: 1996 lerance Secretariat American Bearing Manufacturers Association Approved April 1, 1
9、998 American National Standards Institute, Inc. -,-,- (This foreword is not part of ANSI/ABMA/ISO 3096:1998.) IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of developing International Standards is carried
10、 out through IS0 technical committees. Every member body interested in a subject for which a technical committee has been authorized has the right to be represented on that committee. International organ- izations, governmental and non-governmental, in liaison with ISO, also take part in the 7ork. D
11、raft International Standards adopted by the technical committee are circulated to member bodies for voting. Publication as an International Standard requires approval of at least 75% of the member bodies casting a vote. International Standard 3096 was prepared by Technical Committee ISO/TC4, Rolliiz
12、g bearings, Subcommittee 5, Needle roller bearings. This standard was processed and approved for submittal to ANSI by Accredited Standards Committee B3 on Ball and Roller Bearings. Committee approval of this standard does not necessarily imply that all committee members voted for its approval. Sugge
13、stions for the improvement of this standard gained through experience with its use will be welcomed. These should be sent to: American Bearing Manufacturers Association, Secretariat, ANSI ASC B3, 1200 19th Street, NW, Suite 300, Washington, DC 20036-2422. -,-,- ANSI/ABWISO 3096:1996 Rolling bearings
14、 - Needle rollers - and tolerances 1 Scope This International Standard specifies dimensions and tolerances for finished steel needle rollers used as rolling elements. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of thi
15、s International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated b
16、elow. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 286-2 : 1988. IS0 system of limits and fits - Part 2: Tables of standard tolerance grades and limit deviations for holes and shafts. IS0 4291 : 1985, Methods for the assessment of departure from roundness
17、 - Measurement of variations in radius. 3 Terms, definitions and symbols For the purposes of this International Standard, the following terms and definitions apply. The symbols (except those for tolerances) shown in figures 1 and 2 and the values given in tables 1 and 3 denote nominal dimensions unl
18、ess specified otherwise. 3.1 nominal diameter of a needle roller, - recommended gauges of needle roller; - maximum circularity deviation. In addition, no single diameter within the entire length of a needle roller shall exceed the actual maximum diameter at the middle of its length by more than a) 0
19、,5 pm for grade 2; b) 0,8 pm for grade 3; c) 1 pm for grade 5. 5.2 Length The tolerance on the single length, &, for needle rollers of all grades shall be h13, see IS0 286-2. 5.3 Chamfe? dimension (see figure 1) Chamfer dimension limits for flat end needle rollers of all grades are specified in tabl
20、e 3. 3 ANSI/ABMA/ISO 3096:1996 Table 2 - Variation O f gauge lot diameter, preferred gauges and circularity deviation Tolerance values in micrometres Grade “DwL 1 max. I Needle roller gauges (Upper and lower deviation limits of DW,& Maximum circularity deviation 1 Tolerance values apply only at the
21、middle of the needle roller length. However, each single diameter of a needle roller shall also comply with the requirement of 5 1 2 If nothing to the contrary is agreed between the customer and the supplier. needle rollers of any nominal dimensions and any of the Table 3 - Chamfer dimension limits
22、for flat end needle roller Dimensions in millimetres easurement o f ion Circularity deviation shall be measured at the middle of the needle roller length according to a), annex A, of IS0 4291 :1985. In practice, it is usually measured by a numerical evaluation of the needle roller circumference, as recorded on a polar chart which shows the measured circumference. ANSVABMA/ISO 3096:1996 Annex A (informative) Bibliography 1 J IS0 1 132 : 1 980, Rolling bearings - Tolerances - Definitions. 5