1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ICS 21.040.10 ISBN 0-626-15618-1 SANS 1700-2-15:1996 Edition 1 and nat. amdt 1 ISO 2902:1977 Edition 1 Any reference to SABS 1700-2-15 is deemed to be a
4、reference to this standard (Government Notice No. 1373 of 8 November 2002) SOUTH AFRICAN NATIONAL STANDARD Fasteners Part 2: Screw threads Section 15: ISO metric trapezoidal screw threads General plan This national standard is the identical implementation of ISO 2902:1977 and is adopted with the per
5、mission of the International Organization for Standardization. Published by Standards South Africa 1 dr lategan road groenkloof ! private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 1700-2-15:1996 Edition 1 and na
6、t. amdt 1 ISO 2902:1977 Edition 1 Table of changes Change No. Date Scope Nat. amdt 1 2004 Amended to change the designation of SABS standards to SANS standards with no technical changes. Abstract Specifies a series of diameter and pitch combinations for ISO metric trapezoidal screw threads having th
7、e basic profile in accordance with ISO 2901. Keywords ISO metric threads, bolts, designations, fasteners, screw threads, specifications, tables (data), threads, trapezoidal threads. National foreword This South African standard was approved by National Committee StanSA TC 5120.01, Screw threads and
8、fasteners, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This edition is technically identical to SABS 1700-2-15:1996. Lu - Q; INTERNATIONAL STANDARD. 2902. INTERNATIONAL ORGANIZATION FOR STANDARDIZATION 4vlEXYHAPOHAII OPTAHM3ALWII l-IO
9、 CTAHJIAPTM3ALVM *ORGANISATION INTERNATIONALE DE NORMALISATION ISO metric trapezoidal screw threads - General plan Filetages metriques trapko idaux ISO - Vue densemble First edition - 1977-10-01 UDC 621.882.082.4 Ref. No. ISO 2902-1977 (E) Descriptors : screw threads, trapezoidal threads, specificat
10、ions, designation, diameters, thread pitch. Price based on 2 pages FQREWORD ISO (the International Organization for Standardization) is a worldwide federation of national Standards institutes (ISO member bodies). The work of developing 6nternationa6 Standards is carried out through ISO technical com
11、mittees. Every member body interested in a subject for which a technical committee has been set up has the right to be represented on that committee. lnternationa6 organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted
12、 by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. International Standard ISO 2902 was developed by Technical Committee ISO/TC 1, Screw threads, and was circu6ated to the member bodies in June 1976. It
13、has been approved by the member bodies of the following countries : Austria 6 reland Belgium I taiy Brazil Japan Canada Korea, Rep. of Denmark Mexico Finland Netheriands Germany New Zealand Hungary Norway India Poland The member bod ies of the document on technicai grounds Romania South Africa, Rep.
14、 of Spain Sweden Swi tzerland United Kingdom U.S.A. fol!owing countries expressed disapprova! of the France U.S.S.R. 0 International Organkation for Standardkation, 1977 Printed in Switzerland INTERNATIONAL STANDARD ISO 29024977 (E) ISO metric trapezoidal screw threads - General plan 1 SCOPE AND FIE
15、LD OF APPLICATION This International Standard specifies a series of diameter and pitch combinations for ISO metric trapezoidal screw threads having the basic Profile according to ISO 2901. 2 REFERENCE ISO 2901, ISO metric trapezoidal screw threads - Basic pro file and maximum material profiles. 3 CH
16、OKE OF DIAMETER AND PITCH Choose, for preference, diameters in column 1 of the table and, if necessary, in column 2, and then column 3. The diameters in column 3 shall not be used for new designs. For the diameter retained, choose one of the pitches indicated on the corresponding line, for preferenc
17、e the pitches within frames. If it is necessary to use a trapezoidal thread with a pitch other than indicated in the table, choose one of the pitches assigned to a neighbouring diameter. 4 DESIGNATION The one-Start metric trapezoidal screw threads conforming to this International Standard shall be d
18、esignated by the letters Tr, followed by the values of the nominal diameter and of the pitch expressed in millimetres and separated by the sign x . Example : Tr 40 x 7 The multiple-Start metric trapezoidal screw threads conforming to this International Standard shall be designated by the letters Tr
19、followed by the values of the nominal diameter and of the lead for the multiple-Start threads, separated by the sign X, and, in brackets, the letter P and the value of the pitch (axial distance between two neigh- bouring flanks in the same direction), all expressed in millimetres (see figure). Examp
20、le : Tr 40 x 14 (P7) Lead 14 (Number of Starts = - = - defines a screw thread of Pitch 7 40 diameter with 2 Starts) For left-hand metric trapezoidal screw threads conforming to this International Standard, the letters LH shall be added to the thread designation. Example : Tr 40 x 14 (P7) LH FIGURE -
21、 Lead and pitch of multiple-start thread Ph = lead (axial advance at one turn) P= pitch (axial distance between two neighbouring flanks in the same direction) 1 ISO 29024977 (E) 5 DIAMETER/PITCH COMBINATIONS TABLE - Diameter/pitch Dimensions in millimetres P 4 Pitches Nominal d iameters 44 40 36 32
22、28 24 22 20 18 16 14 12 IO 9 8 7 6 5 4 3 Col. 1 Col. 2 Col. 3 I 8 9 10 I 11 12 14 16 18 4 2 20 4 2 - 1 . 22 8 5 3 24 8 5 3 26 8 5 3 .- 1 : i , 28 / ?P l It , * / I .-l-p _ -. _ 1 I 34 ; 1 . 1 i ! 25 1 I 1 1 b , sc1 1 1 i , 40 42 ) 44 46 8 48 8 3 50 8 3 52 l2 1 8 3 55 14 1 9 3 60 14 91 3 65 16 10 4 7
23、0 16 10 4 75 16 ib 4 80 16 10 4 85 18 12 4 90 18 12 4 95 18 12 4 100 20 12 4 105 20 12 4 110 20 12_ 4 ! 115 22 14 6 120 22 14 6 125 22 l4 I 6 I 130 22 14 6 135 24 14 6 140 24 14 6 145 24 14 I 6 150 24 16 6 155 24 16 6 160 28 16 6 165 28 16 6 170 28 16 6 l 175 28 16, 8 . 180 28 18 8 185 32 18 8 190 32 18 8 195 32 18 8 200 32 18, 8 210 36 20 8 220 36 . 20 8 1 230 36 1 20, I 8 240 36 22 8 250 40 22 12 -. - 260 40 22 12 1 270 40 24 21 280 40 24 12 290 44 24 12 300 44 24 12 2
