ISO 3291-1975 rus PDF

Full title and description

ISO 3291:1975 — Extra‑long Morse taper shank twist drills. This entry describes the original 1975 edition (withdrawn) of the ISO product that defines dimensional and designation conventions for extra‑long twist drills with Morse‑taper shanks. The suffix "rus" in the request indicates a Russian-language cataloging or user interest; the original ISO bibliographic record and later metadata are available in multiple site languages.

Abstract

The 1975 edition of ISO 3291 specified the characteristics and dimensional data for extra‑long twist drills with Morse taper shanks (original edition). The 1975 text has since been withdrawn and the subject matter was updated in later editions (1995 and the current 2016 edition), which formalize preferred diameters and overall length ranges for extra‑long Morse‑shank drills.

General information

• Status: Withdrawn.
• Publication date: 1 May 1975 (original publication).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.100.30 — Drills, countersinks, reamers.
• Edition / version: Edition 1 (1975).
• Number of pages: 3 pages (1975 edition).

Scope

The 1975 edition defined dimensional and designation requirements for extra‑long twist drills fitted with Morse taper shanks. Subsequent revisions consolidated preferred nominal diameters and overall length ranges; for example, the 2016 edition specifies drill diameters from 6 mm to 50 mm and overall lengths from 200 mm to 630 mm. Users should refer to the later editions for current dimensional tables and preferred diameters.

Key topics and requirements

• Definitions and designation of extra‑long twist drills with Morse taper shanks (original 1975 requirements).
• Dimensional specifications and tolerances for shank and overall lengths (core subject of the standard; later editions provide extended tables of preferred diameters and lengths).
• Preferred diameters and nominal size series for extra‑long drills (expanded in later revisions).
• Conventions for marking/designation to ensure interchangeability and correct Morse‑taper sizing.
• Relationship to parallel‑shank and other drill‑shank standards (coordination of drill series and tooling interfaces).

Typical use and users

Manufacturers of cutting tools and twist drills; tooling and fixture designers; machine shops and metalworking suppliers; procurement/specification engineers who need standardized drill dimensions for production and replacement tooling. The document (1975 edition) served as a technical reference for specifying extra‑long Morse‑shank drills prior to later revisions.

Related standards

Standards in the same family and subject area include ISO 3292 (extra‑long parallel shank twist drills) and the later revisions of ISO 3291 itself (ISO 3291:1995 — Edition 2, and ISO 3291:2016 — Edition 3, which is the current published edition). For up‑to‑date dimensional tables and preferred diameters consult ISO 3291:2016.

Keywords

Morse taper, extra‑long twist drills, shank dimensions, drill designation, ISO 3291, drill sizes, preferred diameters, tooling standards.

FAQ

Q: What is this standard?

A: ISO 3291:1975 is the original (first) edition of the International Standard titled "Extra‑long Morse taper shank twist drills" that set out dimensional and designation requirements for extra‑long twist drills with Morse taper shanks. The 1975 edition has been withdrawn.

Q: What does it cover?

A: It covered dimensional specifications, shank and overall length conventions, and designation conventions for extra‑long Morse‑taper shank twist drills. For full, current dimensional tables and preferred sizes, later editions (1995 and 2016) should be consulted; ISO 3291:2016 provides explicit ranges (e.g., 6–50 mm diameters and 200–630 mm overall lengths).

Q: Who typically uses it?

A: Tool manufacturers, tooling engineers, machine shops, procurement and specification writers in manufacturing and metalworking industries who require standardized drill dimensions and interchangeability.

Q: Is it current or superseded?

A: The 1975 edition is withdrawn. It was revised by ISO 3291:1995 (Edition 2) and the current published edition is ISO 3291:2016 (Edition 3). Key dates: published 1 May 1975 (ISO 3291:1975) and withdrawn 14 December 1995 (replacement path: 1995 → 2016). For current requirements use ISO 3291:2016.

Q: Is it part of a series?

A: Yes — ISO 3291 belongs to a family of ISO standards for drill dimensions and shank types (for example ISO 3292 covers extra‑long parallel‑shank twist drills). The number sequence (ISO 3291, ISO 3292, etc.) groups closely related drill‑dimension standards under ICS 25.100.30.

Q: What are the key keywords?

A: Morse taper, extra‑long, twist drills, shank, dimensions, preferred diameters, ISO 3291, tooling, drill series.