1、_SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising theref
2、rom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions.Copyright 2012 SAE International All rights reserved. No part of this pub
3、lication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970
4、(outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AS955AEROSPACESTANDARDAS955 Issued 2012-07 Supersedes MA4534 & MA4535 Metric Sockets
5、, Wrenches, Hand Twelve Point, High Strength, Thin Wall RATIONALEThe creation of AS955 is to incorporate improvements compiled from customer feedback. AS955 supersedes MA4534 and MA4535. TABLE OF CONTENTS 1. SCOPE . 31.1 Classification 31.1.1 Type I Metric Sockets 31.1.2 Type II Metric Box Wrenches,
6、 Double Head . 31.1.3 Type III: Metric Combination Wrench . 32. APPLICABLE DOCUMENTS 42.1 SAE Publications . 42.2 ASME Publications 42.3 ASTM Publications 42.4 ISO Publications 43. REQUIREMENTS 53.1 Illustrations . 53.2 Materials . 53.3 Marking . 53.4 Square Drive Ends 53.4.1 Drive End Dimensions 53
7、.4.2 Tang Engagement and Disengagement . 53.5 Hardness . 63.6 Finish . 63.6.2 Black Oxide or Phosphate Treatment . 63.6.3 Surface Condition 63.7 Test Loads 63.7.1 Mandrels for Wrench Openings 63.7.2 Test Plug . 83.7.3 Qualification Test 93.8 Wrench Opening . 93.8.1 Wrench Design 93.8.2 Qualification
8、 Test Procedure for Wrench Design . 93.8.3 Bolt and Nut End Opening Tolerance 103.8.4 Clearance Holes . 103.9 Type I, Class 2, Universal Sockets . 12SAE AS955 Page 2 of 24 3.10 Type II Box Wrenches, Type III Combination Wrenches 123.10.1 Type II, Class 1, Style A and B Box Wrench, 15 degree offset e
9、ach end . 123.10.2 Type II, Class 3, Style A and B Box Wrench, Modified Offset 123.10.3 Type II, Class 2, Style A Box Wrench, Deep Offset 123.10.4 Type III, Class 1, Style A, B, C, and D Box Wrench, Combination 123.11 Workmanship . 133.11.1 Foreign Object Damage (FOD). 134. NOTES . 24FIGURE 1A INTER
10、NAL WRENCH ENGAGEMENT 9FIGURE 1B MANDREL FOR WRENCH DESIGN TEST PROCEDURE . 10FIGURE 2A BOLT CLEARANCE HOLE . 10FIGURE 2B BOLT CLEARANCE HOLE REQUIREMENT . 11FIGURE 2C BOLT CLEARANCE HOLE GAGE . 12FIGURE 3 TYPE I, CLASS I SOCKET STYLE A, B, AND C 13FIGURE 4 TYPE I, CLASS I SOCKET STYLE A, B, AND C 1
11、4FIGURE 5 TYPE I, CLASS I SOCKET STYLE A, B, AND C 15FIGURE 6 TYPE I, CLASS I SOCKET STYLE A, B, AND C 16FIGURE 7 TYPE I, CLASS 2 UNIVERSAL SOCKETS . 17FIGURE 8 TYPE I, CLASS 2 UNIVERSAL SOCKETS . 18FIGURE 9 TYPE II BOX WRENCH 19FIGURE 10 TYPE II, CLASS 1 15 DEGREE OFFSET ENDS BOX WRENCH . 20FIGURE
12、11 TYPE II, CLASS 3 MODIFIED OFFSET BOX WRENCH . 21FIGURE 12 TYPE II, CLASS 2 DEEP OFFSET BOX WRENCH . 22FIGURE 13 TYPE III, CLASS 1 COMBINATION BOX AND OPEN END WRENCH 23TABLE 1 HEXAGON MANDREL DIMENSIONS AND ENGAGEMENT DATA . 7TABLE 2 BOLT CLEARANCE HOLE REQUIREMENTS . 11TABLE 3 TYPE I, CLASS 1 SO
13、CKETS - 1/4 IN SQUARE DRIVE. 13TABLE 4 TYPE I, CLASS 1 SOCKETS - 3/8 IN SQUARE DRIVE. 14TABLE 5 TYPE I, CLASS 1 SOCKETS 1/2 IN SQUARE DRIVE 15TABLE 6 TYPE I, CLASS 1 SOCKETS - 3/4 IN SQUARE DRIVE. 16TABLE 7 TYPE 1, CLASS 2 UNIVERSAL SOCKETS - 1/4 IN SQUARE DRIVE . 17TABLE 8 TYPE 1, CLASS 2 UNIVERSAL
14、 SOCKETS - 3/8 IN SQUARE DRIVE . 18TABLE 9 TYPE II BOX WRENCH 19TABLE 10 TYPE II, CLASS 1 15 DEGREE OFFSET ENDS BOX WRENCH . 20TABLE 11 TYPE II, CLASS 3, MODIFIED OFFSET BOX WRENCH 21TABLE 12 TYPE II, CLASS 2, DEEP OFFSET BOX WRENCH 22TABLE 13 TYPE III, CLASS 1 COMBINATION BOX AND OPEN END WRENCH 23
15、SAE AS955 Page 3 of 24 1. SCOPE This SAE Aerospace Standard (AS) covers high strength thin wall (commercial) metric sockets, universal metric sockets, metric box wrenches and metric torque adaptors which possess the strength, clearances, and internal wrenching design so configured that, when mated w
16、ith 12 point fasteners conforming to the requirement of ISO 4095, they shall transmit torque to the fastener without bearing on the outer 5% of the fasteners wrenching points. This standard provides additional requirements beyond ASME B107.100 and B107.5M appropriate for aerospace use. Inclusion of
17、dimensional data in this document is not intended to imply that all of the products described herein are stock production sizes. Consumers are requested to consult with manufacturers concerning lists of stock production sizes. The dimensional limits of box and combination wrench lengths have been es
18、tablished to provide configuration control for tool storage applications. 1.1 Classification Metric sockets and wrenches covered by this AS shall be of the following types, classes, and styles, as specified: 1.1.1 Type I Metric Sockets Class 1: Metric Sockets Style A - Regular length Style B - Mid l
19、engthStyle C - Long length Class 2: Universal Joint Metric Sockets 1.1.2 Type II Metric Box Wrenches, Double HeadClass 1: 15 degree offset each end Style A: Regular length Style B: Long lengthClass 2: Deep offset each end Style A: Regular length Class 3: Modified offset each end Style A: Short lengt
20、hStyle B: Regular length 1.1.3 Type III: Metric Combination WrenchClass 1: 15 degree offset each end: Style A: Extra short lengthStyle B: Short length Style C: Regular length Style D: Long lengthSAE AS955 Page 4 of 24 2. APPLICABLE DOCUMENTS The following publications form a part of this document to
21、 the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order. In the event of conflict between the text of this document and references cited herein, the text of this document
22、 takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-7
23、76-4970 (outside USA), www.sae.org.AS478N Identification Marking Methods AS4984A Coating Requirements for Aerospace Hand Tools MA4534 Socket Wrenches, Hand (Metric) MA4535 Wrenches, Box and Open End Combination Twelve Point, High Strength, Thin Wall, Metric2.2 ASME Publications Available from Americ
24、an Society of Mechanical Engineers, 22 Law Drive, P.O. Box 2900, Fairfield, NJ 07007-2900, Tel: 973-882-1170, www.asme.org.ASME B46.1 Surface Texture ASME B107.4 Driving and Spindle Ends for Portable, Hand, Air and Electric Tools ASME B107.5M Socket Wrenches, Hand (Metric Series) ASME B107.100 Flat
25、Wrenches ASME B107.17 Gages and Mandrels for Wrench Openings 2.3 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org.ASTM E 18 Rockwell Hardness and Rockwell Superficial Hardness of Metallic Mate
26、rials, Standard Methods of Test For 2.4 ISO Publications Available from International Organization for Standardization, 1, rue de Varembe, Case postale 56, CH-1211 Geneva 20, Switzerland, Tel: +41-22-749-01-11, www.iso.org.ISO 4095 Fasteners for Aerospace Construction - Bi-hexagonal (Metric) SAE AS9
27、55 Page 5 of 24 3. REQUIREMENTS 3.1 Illustrations The illustrations shown herein are descriptive, not restrictive, and are not intended to preclude sockets, universal sockets, box wrenches and combination wrenches which are otherwise in accordance with this document. 3.2 Materials Unless otherwise s
28、pecified hereinafter, the materials used in the manufacture of the sockets, universal sockets, box wrenches and combination wrenches shall be steel, the chemical composition and heat treatment of which shall be such as to produce tools conforming to the physical requirements specified herein. Powder
29、ed metal or cast steel shall not be used. 3.3 Marking The sockets, universal sockets, box wrenches and combination wrenches shall be marked in a permanent manner with the nominal wrench opening size. In addition, the tools shall be marked with the country of origin and the manufacturers name or with
30、 a trademark of known character that the source of manufacture may be determined. Marking requirement shall be in accordance with AS478N. 3.4 Square Drive Ends 3.4.1 Drive End Dimensions Internal drive end dimensions shall conform to ASME B107.4. External drive tangs in accordance with ASME B107.4 s
31、hall be used to judge the following requirements: 3.4.1.1 Internal Drive Opening All internal drive openings shall be broached or formed in a smooth and well defined manner. Tools having internal drive openings shall be firmly attachable to corresponding size external drive tangs by one of the follo
32、wing methods. 3.4.1.1.1 Detent All four faces of the internal drive opening shall be recessed so that one of the recesses engages the spring loaded steel ball on the corresponding external drive. If the internal drive end thickness is less than twice the dimension Df in Table 7 of ASME B107.4, the r
33、ecess shall be centered in the internal drive opening within 0.25 mm. 3.4.1.1.2 Cross-Hole One or more of the faces of the internal drive opening shall be drilled with a cross-hole to engage the spring loaded steel ball or plunger on the corresponding external drive. If the internal drive end thickn
34、ess is less than twice the dimension Df in Table 7 of ASME B107.4, the cross-hole(s) shall be centered in the internal drive opening within 0.25 mm. 3.4.2 Tang Engagement and Disengagement The detachable sockets and universal sockets shall be so designed that external tangs can be inserted into the
35、corresponding internal openings without undue force and shall be manually detachable without the use of any tools or keys, and meet the minimum force requirements to remove the external tang as specified in applicable tables of ASME B107.4. Binding between surfaces and corners shall not be evident.
36、SAE AS955 Page 6 of 24 3.5 Hardness Unless otherwise specified herein, sockets, universal sockets, box wrenches and combination wrenches shall be hardened throughout to a Rockwell hardness of not less than 40 nor more than 54 on the “C“ scale. Hardness definitions, nomenclature and procedures used h
37、erein can be found in ASTM E 18. When grinding is necessary to prepare the test surface, the amount removed must not exceed 0.18 mm on the surface contacted by the indenter. 3.6 Finish Wrenches shall be protected with one of the following three types as specified within AS4984AType I - Nickel Chromi
38、um coating Type II - Black Oxide or Black Phosphate or Other Black Finish Coatings Type III - Alternate coating (Used in lieu of Nickel Chromium coating) 3.6.1.1 Surface Finish Requirements of Nickel Chromium Plate On all Type I sockets and universal sockets, the outer longitudinal surface or major
39、diameter thereof shall be bright with 30 in maximum Ra, except where knurled or grooved. The remaining exterior longitudinal socket surface shall be 150 in maximum Ra. On all Type II box wrenches and Type III combination wrenches, a minimum of 180 degrees of the outer periphery of the box ends (90 d
40、egrees on each side of the longitudinal axis of the wrench) shall be 30 in maximum Ra. Microinch measurements shall be made with a surface-measuring instrument using a 0.030 in roughness width cutoff. Definitions and nomenclature used herein can be found in ASME B46.1 3.6.2 Black Oxide or Phosphate
41、Treatment The tools shall be coated with a chemically produced oxide or phosphate coating followed with a coating of rust preventive oil. All external surfaces shall have a maximum Ra roughness height value of 250 in. Microinch measurements shall be made with a surface-measuring instrument using a 0
42、.76 mm roughness width cutoff. Definitions and nomenclature used herein can be found in ASME B46.1 3.6.3 Surface Condition All external surfaces shall be free from pits, nodules, forge flash, burrs, cracks, and other detrimental defects. The external forge flash shall blend smoothly with adjacent su
43、rfaces except that the forge flash shall be completely removed from the periphery of the heads of box wrenches and combination wrenches and from that portion of the handle which shall be essentially straight and uniform in section dimensions. 3.7 Test Loads The items covered herein shall withstand t
44、he proof loads set forth in the applicable tables, without failure or permanent deformation (set) which might affect durability or serviceability of the tools. Adequate safeguards for personnel and property shall be employed in conducting all tests. Approved eye protection shall be worn at all times
45、 and equipment safety shields in place when tests are in progress. 3.7.1 Mandrels for Wrench Openings Wrench openings shall be tested on hexagonal mandrels. The size of all mandrels shall conform to the dimensions and tolerances specified in Table 1. The fourth column of Table 1 (Mandrel Engagement
46、Maximum Depth) does not apply when testing Type II box wrenches and Type III combination wrenches. Mandrels shall be hardened to a Rockwell hardness of not less than 55 on the “C“ scale and shall have smoothly finished wrench engagement surfaces. SAE AS955 Page 7 of 24 TABLE 1 - HEXAGON MANDREL DIME
47、NSIONS AND ENGAGEMENT DATA ForWrenchSizes(mm)Hexagonal MandrelAcross Flats Tolerances (mm) Mandrel Across Corners(Ref) (mm) Mandrel Engagement Maximum Depth of Insertion (mm)No Bearing Area for Mandrel(Ref) (mm) Plus Minus 3.2 0.025 0.05 3.68 1.3 0.014 0.025 0.05 4.60 1.6 0.014.5 0.025 0.05 5.17 1.8
48、 0.015 0.025 0.05 5.75 2 0.015.5 0.025 0.05 6.32 2.4 0.026 0.025 0.05 6.90 2.6 0.027 0.025 0.05 8.05 3.2 0.028 0.025 0.05 9.19 4 0.029 0.025 0.05 10.34 4.4 0.0310 0.025 0.05 11.49 4.8 0.0311 0.025 0.05 12.64 5.6 0.0312 0.025 0.076 13.79 6 0.0413 0.025 0.076 14.94 6.4 0.0414 0.025 0.076 16.09 7 0.041
49、5 0.025 0.076 17.24 7.4 0.0416 0.025 0.076 18.39 8 0.0517 0.025 0.076 19.54 8.8 0.0518 0.025 0.076 20.69 9.6 0.0519 0.025 0.076 21.84 10.2 0.0620 0.025 0.076 22.99 10.6 0.0621 0.025 0.076 24.14 11.2 0.0622 0.025 0.076 25.28 11.8 0.0723 0.025 0.076 26.43 12.2 0.0724 0.025 0.076 27.58 12.8 0.07SAE AS955 Page 8 of 24 TABLE 1 - HEXAGON MANDREL DIMENSIONS AND ENGAGEMENT DATA (CONTINUED) ForWrenchSizes(mm)Hexagonal MandrelAcross Flats Tolerance
