1、i Needle Roller bearings Radial Inch Design ANSI/ABMA 18.2:1982 ANSI/ABMA 18.2:1982 (Reaffirmed 2008) Secretariat American Bearing Manufacturers Association ANSI/ABMA 18.2:1982 Stabilized Maintenance 2013 Accredited Standards Committee B3 ii AMERICAN NATIONAL STANDARD (This is not an approved part o
2、f 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 affect
3、ed 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 exis
4、tence 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 circums
5、tances 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 secreta
6、riat 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 CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. This standard is maintained under stabilized maintenance and will be reviewed by Accredited Standards Committee B3 on a 10-year cycle. A
7、ny materially affected and interested party that feels this standard should be revised or withdrawn should submit their rationale for revision or withdrawal to the B3 Secretariat at the address below. Purchasers of American National Standards may receive current information on all standards by calli
8、ng or writing the American National 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 2013 by American Bearing Manufacturers Association All rights reserved. No part of this publication
9、 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 iii iv Needle Roller Bearings Radial, Inch Design CONTENTS SECTION PAGE 1. Scope 1 2. Identification Code . 1 3. Boundary Dimensi
10、ons 6 4. Tolerances . 7 5. Fitting and Mounting Practice . 7 5.1 General . 75.2 Needle Roller Bearings. Drawn Cup 75.3 Needle Roller Bearings. Machined Ring 75.4 Needle Roller and Cage Assemblies . 85.5 Needle Roller Bearing Track Rollers 9 List of Tables ivv LIST OF TABLES* Table No. Title Page BAS
11、IC PLANS FOR BEARING BOUNDARY DIMENSIONS 3.1 Drawn Cup, Without Inner Ring Part 1 mm . 10 Part 2 inches 12 3.2 Machined Ring, Without Inner Ring, Part 1 mm . 14 Part 2 inches 15 3.3 Inner Ring Part 1 mm . 16 Part 2 inches 17 3.4 Needle Roller and Cage Assembly Part 1 mm . 18 Part 2 inches 19 Track R
12、oller, Machined Ring, 3.5 Non-Separable Threaded Stud Part 1 mm . 20 Part 2 inches 21 3.6 Non-Separable Inner Ring Part 1 mm . 22 Part 2 inches 23 BEARING TOLERANCE LIMITS 4.1 Drawn Cup, Without Inner Ring Part 1 mm . 24 Part 2 inches 24 4.2 Machined Ring, Without Inner Ring Part 1 mm . 25 Part 2 in
13、ches 25 4.3 Inner Ring Part 1 mm . 26 Part 2 inches 26 4.4 Needle Roller and Cage Assembly Part 1 mm . 27 Part 2 inches 27 Track, Roller, Machined Ring, 4.5 Non-Separable Threaded Stud Part 1 mm . 28 Part 2 inches 28 4.6 Non-Separable Threaded Stud Part 1 mm . 29 Part 2 inches 29vi Table No. Title P
14、age MOUNTING SURFACE TOLERANCE LIMITS INCH DESIGN Drawn Cup, Without Inner Ring 5.1 Outer Ring Stationary Relative to Load Part 1 mm . 30 Part 2 inches 30 5.2 Outer Ring Rotating Relative to Load Part 1 mm . 31 Part 2 inches 31 Machined Ring, Without Inner Ring 5.3 Outer Ring Stationary Relative to
15、Load Part 1 mm . 32 Part 2 inches 32 5.4 Outer Ring Rotating Relative to Load Part 1 mm . 33 Part 2 inches 33 5.5 Inner Ring Part 1 mm . 34 Part 2 inches 34 5.6 Needle Roller and Cage Assembly Part 1 mm . 35 Part 2 inches 35 Track Roller, Machined Ring, 5.7 Non-Separable Threaded Stud Part 1 mm . 36
16、 Part 2 inches 37 5.8 Non-Separable Inner Ring Part 1 mm . 38 Part 2 inches 39 *This standard contains only Inch Design Products. Metric Design Products will be found in Standard 18.1 (ABMA Standard 18.1)1 Needle Roller Bearings Radial, Inch Design 1. SCOPE This standard for Inch Design Industrial R
17、adial Needle Roller Bearings and components includes: Identification Code Boundary Dimensions Bearing Tolerances Fitting and Mounting Practice Airframe Needle Roller Bearings, Needle Roller Thrust Bearings, and bearings of other types are covered in separate ABMA-ANSI Standards. 2. IDENTIFICATION CO
18、DE 2.1 General. This code identifies and, as far as possible, describes each needle roller bearing or component on the basis of complete dimensional and functional interchangeability. This code establishes a universal language for describing and identifying bearings and components in order to facili
19、tate communications between the user and the manufacturer. The code is also intended to simplify the handling by user personnel of identical bearings made by different manufacturers, whose identification numbers may be different and difficult to interpret. This code applies only to those radial need
20、le roller bearings or components whose boundary dimensions and tolerances conform to this standard. 2.2 Structure of Code. As shown in the following table, Schematic Arrangement of a Complete Code Number, the code consists of three sections. Section 1, called the Basic Number, includes a diameter sy
21、mbol made up of a group of numerals, followed by a type symbol made up of a group of letters and finally by a dimension series symbol made up of a group of numerals. This Basic Number must always be used. Sections 2 and 3 delineate modification of design and lubricants and, if required to complete t
22、he identification, consist of additional letters. In the Schematic Arrangement Tables, “O“ represents any code numeral and “A“ represents any code letter. 2 SCHEMATIC ARRANGEMENT OF A COMPLETE CODE NUMBER Section 1, Basic Number Section 2 Section 3 Diameter Type Dimension Series Cage Material or Int
23、egral Seals or Crowned Outside Surface Lubricant or Preservative 000 AAAA 00 AAA A 2.2.1 Section, Basic Number SCHEMATIC ARRANGEMENT OF SECTION 1 Section 1: Basic Number Diameter Type Dimension Series 000 AAAA 00 The Diameter is indicated by two or three numerals comprising the diameter symbol as sh
24、own in Boundary Dimension Tables 3.1-3.6. The Type is indicated by two, three or four letters comprising the type symbol shown in 2.2.2. The Dimension Series is indicated by two numerals. The first numeral indicates the width series and the second, the diameter series. Both are shown in Boundary Dim
25、ension Tables 3.1-3.6. 2.2.2 Bearing and Component Type Symbols 3 A. NEEDLE ROLLER BEARINGS, DRAWN CUP* Symbol Description NIB Needle roller bearing, full complement, drawn cup, without inner ring. NIBM Needle roller bearing, full complement, drawn cup, closed end, without inner ring. NIY Needle rol
26、ler bearing, full complement, rollers retained by lubricant, drawn cup, without inner ring. NIYM Needle roller bearing, full complement, rollers retained by lubricant, drawn cup, closed end, without inner ring. NIH Needle roller bearing, with cage, drawn cup, without inner ring. NIHM Needle roller b
27、earing, with cage, drawn cup, closed end, without inner ring. Boundary Dimensions shown in Table 3.1 B. NEEDLE ROLLER BEARINGS, MACHINED RING Symbol Description NIA Needle roller bearing, with cage, machined ring, lubrication hole and groove in OD, without inner ring. Boundary Dimensions shows in Ta
28、ble 3.2. Inner Rings, Type Symbol NIR, may be used with machined ring bearings, Type NIA. C. NEEDLE ROLLER BEARING INNER RINGS* Symbol Description NIR Needle roller bearing inner ring, lubrication hole and groove in bore. Boundary Dimensions shows in Table 3.3. Machined Ring Needle Roller Bearings,
29、Type Symbol NIA, may be used with inner rings, Type NIR. *This standard contains only inch design products. Metric design products will be found in Standard 18.1 (ABMA Standard 18.1) 4 D. NEEDLE ROLLER AND CAGE ASSEMBLIES* Symbol Description NIM Needle roller and cage assembly. Boundary Dimensions s
30、hows in Table 3.4. E. NEEDLE ROLLER BEARING TRACK ROLLERS * Symbol Description NIS Needle roller bearing track roller, full-complement, non-separable threaded stud, lubrication hole in stud. NIU Needle roller bearing track roller, full complement, non-separable inner ring, lubrication hole and groov
31、e in bore. Boundary Dimensions shown in Table 3.5 and 3.6. *This standard contains only inch design products. Metric design products will be found in Standard 18.1 (ABMA Standard 18.1) 5 2.2.3 Section 2, Modification of Design SCHEMATIC ARRANGEMENT OF SECTION 2 Section 2 Cage Material or Integral Se
32、als or Crowned Outside Surface AAA The cage material or integral seal information or whether the outer ring has a crowned outside surface is indicated by one or two or three letters, used in the order shown in the following table of symbols. If the bearing has a full complement of rollers, or if a c
33、age of any construction is acceptable, and if the bearing is not sealed and if bearing does not have a crowned outside surface, Section 2 is omitted. If Section 2 has been omitted and Section 3 is required, space Section 3 from Section 2 by using the symbol “X“. CAGE AND SEAL SYMBOLS * Symbol Descri
34、ption X Spacer when Section 3 required J Steel Cage H Non-ferrous metal cage N Non-metallic cage R Double seals (Applies only to Types NIH, NIA, NIS, NIU) W Single seal (applies only to Types NIA, NIH, NIHM) S Crowned outside surface (applies only to Types NIS, NIU) 2.2.4 Section 3, Lubricants and P
35、reservatives SCHEMATIC ARRANGEMENT OF SECTION 3 Section 3 Lubricants and Preservatives A A final letter symbol is added to the bearing code if required to indicate the preservative or lubricant as shown below. The quality of lubricant used is not subject to coding. *This standard contains only inch
36、design products. Metric design products will be found in Standard 18.1 (ABMA Standard 18.1) 6 LUBRICANT AND PRESERVATIVE SYMBOLS Symbol Description No Symbol Used Manufacturers regular preservative or lubricant for the particular bearing involved A Special preservative or lubricant to satisfy partic
37、ular conditions; for details refer to the Bearing Manufacturer. 2.2.5 Coding Examples. The following examples illustrate the application and meaning of typical bearing and component codes. 16NIB95XA From 2.2.2, NIB is found to be the type symbol for an inch design, needle roller bearing, full comple
38、ment, drawn cup, without inner ring. Also 2.2.2 states that Table 3.1 lists the boundary dimensions for Type NIB. Referring to Table 3.1-Part 2, the diameter symbol 16 indicates a bore diameter of 1.0000 inch and the dimension series symbol 95 indicates an outside diameter of 1.2500 inch and a width
39、 of 1.0000 inch. Referring to 2.2.3, X is found to be a coding spacer, since this full complement bearing has no cage and is not sealed. From 2.2.4, A is found to indicate that some special preservation or lubricant is required. 40NIA25 From 2.2.2, NIA is found to be the type symbol for inch design,
40、 needle roller bearing, with cage, machined ring, without inner ring. Also 2.2.2 states that Table 3.2 lists the boundary dimensions for Type NIA. Referring to Table 3.2-Part 2, the diameter symbol 40 indicates a bore diameter of 2.5000 inch and the dimension series symbol 25 indicates an outside di
41、ameter of 3.2500 inch and a width of 1.500 inch. Referring to 2.2.3, the absence of letters after the dimension series symbol indicates that the cage construction is not specified and that the bearing is not sealed. From 2.2.4, the absence of a letter indicates the bearing is packed with the manufac
42、turers standard preservative or lubricant. 26NIM36 From 2.2.2, NIM is found to be the type symbol for an inch design, needle roller and cage assembly. Also 2.2.2 states that Table 3.4 lists the boundary dimensions for type NIM. Referring to Table 3.4-Part 2, the diameter symbol 26 indicates a bore d
43、iameter of 1.6250 inch and the dimension series symbol 36 indicates an outside diameter of 2.0000 inch and a width of 1.250 inch. Referring to 2.2.3, the absence of letters after the dimension series symbol indicates that the cage construction is not specified. From 2.2.4 the absence of a letter ind
44、icates the assembly is packed with the manufacturers standard preservative or lubricant. 56NIU15R From 2.2.2, NIU is found to be the type symbol for inch design, needle roller bearing track roller, full complement, machined ring, nonseparable inner ring. Also 2.2.2 states that Table 3.6 lists the bo
45、undary dimensions for Type NIU. Referring to Table 3.6-Part 2, the diameter symbol 56 indicates an outside diameter of 3.5000 inch and the dimension series symbol 15 indicates a bore diameter of 1.1250 inch and a width of 2.062 inch. Referring to 2.2.3, R is found to indicate that the bearing has do
46、uble seals. Referring to 2.2.4 the absence of a letter indicates the bearing is packed with the manufacturers standard preservative or lubricant. 3. BOUNDARY DIMENSIONS* 3.1 Purpose of Plans. The boundary plans shown in the Boundary Dimensions Tables 3.1-3.6 are designed to reduce the number of bear
47、ing and component sizes, as much as possible, to promote economic production and yet provide a sufficient number of sizes and proportions to satisfy present and future needs of bearing users. 7 4. BEARING AND COMPONENTS TOLERANCES 4.1 General The tolerance limits for inch design bearings and compone
48、nts are based upon long-established practice. 4.2 Tolerance Definitions and Gaging Practice. Definitions of most terms used in the tolerance limit tables as well as gaging practices are covered in ANSI Standard B3.4ABMA Standard 4. Terms not defined in ANSI Standard B3.4ABMA Standard 4 are explained
49、 in the tolerance limit tables. 5. FITTING AND MOUNTING PRACTICE* 5.1 General. This section covers needle roller bearing and component fitting and mounting practice for normal operating conditions. Tables 5.1 - 5.8 list the tolerance limits required for shaft and housing seat diameters for bearings with inner and outer rings as well a
