EN 22568:1989

Hand- and machine-operated circular screwing dies and hand-operated die stocks (ISO 2568:1988)

Specifies how to prepare detail specifications for power
transformers. Includes a blank detail specification, which shows
the format, and indicates which tests are considered to be
appropriate to this type of component.

Runde Hand- und Maschinenschneideisen und Schneideisenhalter (ISO 2568:1988)

Filières rondes de filetage, à main et à machine, et porte-filière à main (ISO 2568:1988)

La présente Norme internationale fixe les dimensions générales des filières à main et à machine. Ces dimensions, établies en fonction du diamètre et du pas de filetage, sont les suivantes:
diamètre extérieur;
épaisseur;
longueur taillée;
dimensions générales de fixation.
Elle fixe également les dimensions d'interchangeabilité des porte-filières à main. La présente Norme internationale est applicable aux filières destinées à l'exécution des filetages suivants:
Filetages métriques ISO:
à pas gros, de M1 à M68;
à pas fins, de M1 à M56.
Filetages ISO en inches:
série «Unified Coarse» (UNC), de N° 1 -- 64 à 2 3/4 -- 4;
série «Unified Fine» (UNF), de N° 0 -- 80 à 1 1/2 -- 12.
Les caractéristiques dimensionnelles des filières rondes, en fonction
des diamètres et pas de filetage, sont données dans l'annexe A.

Hand- and machine-operated circular screwing dies and hand-operated die stocks (ISO 2568:1988)

General Information

• Status: Published
• Publication Date: 27-Sep-1989
• Withdrawal Date: 27-Mar-1990
• ICS: 25.100.50 - Taps and threading dies
• Technical Committee: CEN/SS I09 - Small tools
• Drafting Committee: CEN/SS I09 - Small tools
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 13-Oct-1999
• Completion Date: 13-Oct-1999
• Ref Project: SIST EN 22568:2000 - Hand- and machine-operated circular screwing dies and hand-operated die stocks (ISO 2568:1988)

Overview

EN 22568:1989 (identical to ISO 2568:1988) specifies the general dimensions and interchangeability requirements for hand- and machine-operated circular screwing dies and hand-operated die stocks. The standard establishes dimensional rules for threading dies used to produce ISO metric threads (coarse and fine), ISO inch threads (UNC and UNF), and - in an informative annex - non‑ISO inch threads (BSW, BSF, BA). It also covers marking conventions and tolerance classes for precision and non‑precision dies.

Key topics and technical requirements

• Scope of threads covered
  • ISO metric coarse: M1 to M68
  • ISO metric fine: M1 to M56
  • ISO inch (UNC): ranges from No. 1‑64 up to larger inch sizes shown in the standard
  • ISO inch (UNF): ranges from No. 0‑80 up to sizes listed in the standard
  • Annex B: guidance dimensions for BSW, BSF and BA series (informative)
• Dimensional parameters defined
  • Outside diameter (D)
  • Thickness and cutting portion length (C)
  • General dimensions of attachments and chamfers
  • Die‑stock interchangeability dimensions (for hand die stocks)
• Classes and tolerances
  • Two classes: precision and non‑precision screwing dies
  • Precision tolerances specified (e.g., D: f10; E: js12); non‑precision tolerances are left to the manufacturer’s discretion
• Tables and annexes
  • Annex A: detailed dimensional tables for metric and inch threads
  • Annex B: non‑ISO inch thread dimensions (informative)
• Marking
  • Required marking format with examples (e.g., M12 x 1.25, 1/4‑20‑UNC, No. 12‑28‑UNF, BA No. 4)
  • Option to append the ISO symbol when fully compliant

Practical applications and users

• Tool manufacturers producing circular screwing dies and die stocks - to ensure dimensional conformity and interchangeability.
• Toolroom and machine shops selecting threaded tooling for production or repair.
• Procurement and quality engineers specifying and inspecting dies for assembly lines or maintenance.
• Design engineers needing standard die dimensions to match fixtures or tool-holders.
• Technical training and documentation for standards-based tool selection and marking.

Using EN 22568 / ISO 2568 helps organizations achieve consistent thread quality, interchangeability of hand die stocks, and clear marking for traceability.

Related standards

• ISO 4230 (referenced for taper-pipe “R” series threads) - see ISO 4230 for taper thread die details.
• National adoptions: this ISO text was adopted as EN 22568 and later as national variants (e.g., SIST EN 22568).

Keywords: circular screwing dies, hand-operated die stocks, ISO 2568, EN 22568, threading dies dimensions, metric threads, UNC UNF, BSW BSF BA, die stock interchangeability, precision screwing dies, die marking.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Hand- and machine-operated circular screwing dies and hand-operated die stocks (ISO 2568:1988)Runde Hand- und Maschinenschneideisen und Schneideisenhalter (ISO 2568:1988)Filieres rondes de filetage, a main et a machine, et porte-filiere a main (ISO 2568:1988)Hand- and machine-operated circular screwing dies and hand-operated die stocks (ISO 2568:1988)25.100.50Navojna rezalna orodjaTaps and threading diesICS:Ta slovenski standard je istoveten z:EN 22568:1989SIST EN 22568:2000en01-december-2000SIST EN 22568:2000SLOVENSKI
STANDARD
INTERNATIONAL STANDARD INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEXflYHAPOflHAR OPrAHM3A~MFl I-IO CTAH/jAPTM3A~MM Hand- and machine-operated circular screwing dies and hand-operated die Stocks Filikes rondes de filetage, a main et a machine, et porte-fili&re 4 main ISO 2568 Second edition 1988-12-01 Reference number ISO 2568 : 1988 (E) SIST EN 22568:2000

~so 2568 : 1988 (El Foreword ISO (the International Organization for Standardization) is a worldwide federation of national Standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Esch member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 2568 was prepared by Technical Committee ISO/TC 29, Smal. too 1s. This second edition cancels and replaces the first edition (ISO 2568 : 1973), of which it constitutes a minor revision. lt incorporates amendments 1 and 2, published in 1977 and 1983 respectively, and a new clause 5 “Marking” has been added. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated. 0 International Organkation for Standardkation, 1988 Printed in Switzerland SIST EN 22568:2000

INTERNATIONAL STANDARD ISO 2568 : 1988 (E) Hand- and machine-operated circular screwing dies and hand-operated die Stocks 1 Scope and field of application This International Standard specifies the general dimensions of hand-operated and machine-operated screwing dies. These dimensions, established as a function of the thread diameter and pitch, are the following: - outside diameter ; - thickness; - cutting Portion length; - general dimensions of attachment. lt also gives the interchangeability dimensions of hand-operated die Stocks. This International Standard is applicable to screwing dies intended for the manufacture of the following threads: - ISO metric threads: - coarse thread, from Ml to M68; - fine thread, from Ml to M56. - ISO inch threads: - “Unified coarse” series (UNC), from No. 1 - 64 to 2 3/4 - 4; - “Unified fine” series (UNF), from No. 0 - 80 to 1 1/2 - 12. The dimensional characteristics of circular screwing dies, as a function of thread diameters and pitches, are given in annex A. The general dimensions of screwing dies for threads which are not dealt with in this International Standard, and therefore are not recommended, are given for guidance only in annex B. Annex B is applicable to screwing dies for inch threads of the following types: B.1 - “British Standard Whitworth” (BSWL B.2 - “British Standard Fine” ( BSF). B.3 - “British Association” ( BA). All screwing dies are available in two classes, namely - non-precision screwing dies; - precision screwing dies. 1 SIST EN 22568:2000

ISO 2568 : 1988 (El 2 ISO metric threads Screwing dies with : D = 16and20mm D>25mm A-A Figure 1 - Metric screwing dies Table 1 2.1 Coarse thread Dimensions in millimetres Designation d Pitch D E C nom. Designation d Pitch D nom. Ml 1 Ml,l 1,l 0,25 b a M12 1 121 1 , 1 M14 14 M16 16 2 12 1 45 18” 6 I M18 1 18 I I M20 1 20 I 2,5 8 M24 24 55 22 1,5 M27 27 3 M30 30 - M33 33 3,5 65 25 M36 36 ‘M M39 39 4 1 1 M42 42 75 30 I 2 M45 45 4,5 M48 48 90 36 2 M52 52 5 M56 56 M60 60 5,5 105 36 . M64 64 2,5 M68 68 6 120 36 * For an M16 die, this dimension is an exception to the general table (table 6) given in annex A. 10 0,5 W W3 16 11 5 a 02 015 1 M4,5 4,5 0,75 M5 5 03 M6 6 M7 7 1 NOTES 1 The shape of the V-groove is left to the discretion of the manufacturer. Screwing dies are generally supplied with two chamfers at the thread entrance, according to the material to be threaded and at the discretion of the manufacturer. 2 Tolerantes : - for precision screwing dies: - on D: fl0 - on E: js12 - for non-precision screwing dies: - on D and E: the tolerantes are left to the discretion of the manufacturer. 2 SIST EN 22568:2000

ISO2568:1988(E) - 2.2 Fine thread Table 2 Dimensions in millimetres a imigz; ino:- /Pitch d I l Pitch nom. b Designation D E C b a 18 25 18 25 18 25 1,8 20 30 20 30 20 30 22 36 22 36 2 22 36 22 36 22 36 2,5 22 36 Ml,l x 0,2 1 1,l 1 M1,6 x 0,2 1,6 1 16 M33 x 1,5 1,5 M33 x 2 33 2 M33 x 3 3 M35 x 1,5 35 1,5 M36 x 1,5 1,5 M36 x 2 36 2 M36 x 3 3 M39 x 1,5 1,5 M39 x 2 39 2 M39.x 3 3 M40 x 1,5 1,5 M40 x 2 40 2 M40 x 3 3 M42 x 1,5 1,5 M42 x 2 2 M42 x 3 42 3 M42 x 4 4 M1,8 x 0,2 1,8 1 65 02 M2,5 x 035 1 2,5 1 M3 x 035 1 3 / 0,35 M5,5 x 0,5 5,5 1 016 75 25 W3 8 M14 x 1,25 1 1 1,25 10 M15 x 1,5 15 M48 x 1,5 M48 x 2 M48 x 3 M48 x 4 M16 x 1,5 1 16 1 1,5 6 M17 x 1,5 1 17 1 14 M24 x 1,5 1 1 1,5 16 M25 x 1,5 1,5 8 65 18 IA3 10 For the shape of the V-groove and the tolerantes, see notes 1 and 2 in 2.1. SIST EN 22568:2000

ISO 2568 : 1988.(E) 3 ISO inch threads Screwing dies with : D = 16andZOmm D>25mm A-A Figure 2 - Screwing dies UNC and UNF 31 . “Unified coarse” series WNCI Table 3 Designation d nom. Pitch z Dimensions in millimetres D El b a E I No. 1 -64 - UNC I ‘,= I 0,397 r No. 2 - 56 - UNC 1 2,184 I 0,454 16 11 5 3 3 0,5 02 No. 3 -46 - UNC 2,515 0,529 No. 4 -40 - UNC 2,845 No. 5 -40 - UNC 3,175 o,f= No. 6 -32 - UNC 3,505 No. 8 -32 UNC 4,166 0,794 - No. IO - 24 - UNC 4,826 4 20 W 0,5 1 No. 12 - 24 - UNC 5,486 1,058 5 r 114 -20 - UNC I 6,35 I 1,27 033 -mmmp5/i6 - 18 - UNC 1 7,938 I 1,411 25 30 I 318 - 16 - UNC I 9,525 I ‘,= 1 r 7116 - 14 - UNC I 11,112 I 1,814 112 - 13 - UNC ‘12,7 1,954 9/16 - 12 - UNC 14,288 2,117 38 45 18 ‘2 6 I 518 - 11 - UNC I 15,875 I 2,309 314 - 10 - UNC 19,05 234 718 - 8 - UNC 22,225 2,822 1 - 8 - UNC 25,4 3,175 55 ‘,5 22 65 25 11/8 - 7 - UNC 28,575 Ill4 - 7 - UNC 31,75 3,629 1318 - 6 - UNC 34,925 1112 6 UNC S’ 4,233 - - 8 10 ‘3 2 75 30 2 I 1314 - 5 - UNC I 44,45 I 5,@ 90 36 36 2 - 41/2- UNC 5W 2 4 1/2 - UNC 57,15 5,644 1/4 - 105 2,5 2112 - 4 - UNC 63,5 2 314 - 4 - UNC 69,85 6,35 4 SIST EN 22568:2000

ISO 2568 I 1988 (El 3.2 “Unified fine” series (UNF) Table 4 Dimensions in millimetres Designatisn d Pitch nom. z I D I No. 0 - 60 - UNF I 1,524 I 0,318 I No. 1 - 72 - UNF 1,854 0,353 16 No. 2 - 84 - UNF 2,184 0,397 11 I No. 3 - 56 - UNF I 2,515 0,454 I I No. 4 - 48 - UNF I 2,845 0,529 -1 l No. 5 - 44 - UNF I 3,175 I 0,577 I I No. 6 - 40 - UNF I 3,505 I 0,635 I I No. 8 - 38 - UNF I 4,166 I 0,706 I 20 l No. 10 - 32 - UNF I 4,826 0,794 I No. 12 - 26 - UNF 5,486 1/4 - 28 - UNF 6,35 0,907 5/16 - 24 - UNF 7,938 25 318 - 24 - UNF 9,525 1,058 7/16 - 20 - UNF 11,112 30 112 - 20 - UNF 12,7 1,27 38 9/16 - 18 - UNF 14,288 5/8 18 UNF 15,
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