ISO 2568:1988 PDF

Hand- and machine-operated circular screwing dies and hand-operated die stocks

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Title (English):

ISO 2568:1988

Hand- and machine-operated circular screwing dies and hand-operated die stocks

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 11
Publication date:: November 24, 1988
Edition:: ISO IS 2568 edition 2 version 1
ICS:: 25.100.50

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Document language:

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Description (English):

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.

Technical details

Technical committee: ISO/TC 29/SC 9 - Tools with defined cutting edges, holding tools, cutting items, adaptive items and interfaces
SKU: ISO 2568:1988

Abstract

Overview

ISO 2568:1988 specifies the general dimensions, interchangeability and marking of circular screwing (threading) dies and hand-operated die stocks. Applicable to both hand- and machine-operated circular screwing dies, the standard defines dimensional characteristics tied to thread diameter and pitch and covers a broad set of thread systems used in industry.

Key topics and technical requirements

Scope of application
- Applies to ISO metric threads (coarse: M1 to M68; fine: M1 to M56).
- Applies to ISO inch threads of the Unified family (UNC and UNF): UNC from No. 1‑64 to 2 3/4 ‑ 4; UNF from No. 0‑80 to 1 1/2 ‑ 12.
- Annex B gives guidance (non‑normative) for non‑ISO inch threads: BSW, BSF, and BA types.
Dimensional data
- Specifies general die dimensions as functions of thread diameter and pitch: outside diameter, thickness, cutting portion length, and attachment dimensions.
- Dimensional tables and cut‑length data are provided (Annex A and main tables).
Die stocks - interchangeability
- Defines interchangeability dimensions for hand‑operated die stocks so dies from different manufacturers can fit standard holders (see Table 5 and Figure 3).
Tolerance and classes
- Two classes of dies: precision and non‑precision.
- For precision dies tolerances are specified (example: on D = f10; on E = js12). For non‑precision dies tolerances on D and E are left to the manufacturer’s discretion.
Marking
- Clause added in this edition requires dies to be marked with thread designation (examples: "M12 x 1.25", "1/4‑20‑UNC", "No. 12‑28‑UNF", "1/2‑12‑BSW").
- Manufacturers may append the ISO symbol when fully conformant.

Applications and users

Manufacturers of threading dies and die stocks who need to design to recognized dimensions and ensure interchangeability.
Toolmakers, maintenance workshops and metalworking shops choosing or replacing dies for manual or machine threading.
Purchasing and quality teams specifying tooling to guarantee compatibility across suppliers.
Technical authors and standards engineers documenting tooling specifications.

Practical benefits

Ensures interchangeability of dies and die stocks across suppliers.
Simplifies procurement by standardizing marking and dimensional references for metric and inch threads.
Facilitates correct selection of precision vs. non‑precision dies based on tolerance requirements.

Related standards

ISO 2568 references other ISO work (prepared by ISO/TC 29). For taper pipe threads see ISO 4230 (referenced in notes for R‑series threads).

Related standards

Mentioned in the description and other ISO standards

Abstract

Overview

Key topics and technical requirements

Scope of application
- Applies to ISO metric threads (coarse: M1 to M68; fine: M1 to M56).
- Applies to ISO inch threads of the Unified family (UNC and UNF): UNC from No. 1‑64 to 2 3/4 ‑ 4; UNF from No. 0‑80 to 1 1/2 ‑ 12.
- Annex B gives guidance (non‑normative) for non‑ISO inch threads: BSW, BSF, and BA types.
Dimensional data
- Specifies general die dimensions as functions of thread diameter and pitch: outside diameter, thickness, cutting portion length, and attachment dimensions.
- Dimensional tables and cut‑length data are provided (Annex A and main tables).
Die stocks - interchangeability
- Defines interchangeability dimensions for hand‑operated die stocks so dies from different manufacturers can fit standard holders (see Table 5 and Figure 3).
Tolerance and classes
- Two classes of dies: precision and non‑precision.
- For precision dies tolerances are specified (example: on D = f10; on E = js12). For non‑precision dies tolerances on D and E are left to the manufacturer’s discretion.
Marking
- Clause added in this edition requires dies to be marked with thread designation (examples: "M12 x 1.25", "1/4‑20‑UNC", "No. 12‑28‑UNF", "1/2‑12‑BSW").
- Manufacturers may append the ISO symbol when fully conformant.

Applications and users

Manufacturers of threading dies and die stocks who need to design to recognized dimensions and ensure interchangeability.
Toolmakers, maintenance workshops and metalworking shops choosing or replacing dies for manual or machine threading.
Purchasing and quality teams specifying tooling to guarantee compatibility across suppliers.
Technical authors and standards engineers documenting tooling specifications.

Practical benefits

Ensures interchangeability of dies and die stocks across suppliers.
Simplifies procurement by standardizing marking and dimensional references for metric and inch threads.
Facilitates correct selection of precision vs. non‑precision dies based on tolerance requirements.

Related standards

ISO 2568 references other ISO work (prepared by ISO/TC 29). For taper pipe threads see ISO 4230 (referenced in notes for R‑series threads).

ISO 2568:1988 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Applications and users

Practical benefits

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Applications and users

Practical benefits

Related standards

Related standards

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

Hand- and machine-operated circular screwing dies for taper pipe threads - R series (ISO 4230:2016)

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