ISO 237-1975 rus PDF

Full title and description

ISO 237:1975 — Rotating tools with parallel shanks — Diameters of shanks and sizes of driving squares. The standard specifies preferred shank diameters and corresponding driving-square sizes for rotating cutting tools with cylindrical (parallel) shanks, covering metric and inch dimensions and two series of dimension tables.

Abstract

Applies to reamers, screwing taps and other rotating tools with parallel shanks. The standard gives two series of dimensions, divides the complete range of diameters into specified diameter steps, and sets values for across-flats of driving squares and preferred diameters (metric values scaled to the R20 series; inch tables are exact conversions of the metric values).

General information

• Status: Published (current as confirmed by ISO review history).
• Publication date: 1975-02 (Edition 1, February 1975).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.100.01 — Tools for turning, milling, drilling, reaming, broaching.
• Edition / version: Edition 1 (1975).
• Number of pages: 5.

Scope

This standard specifies nominal diameters and driving-square sizes for rotating tools having parallel (cylindrical) shanks. It is intended to standardize the preferred diameters and the corresponding across‑flat dimensions of driving squares so that replacement, mounting and manufacture of reamers, taps and similar tools are consistent. The metric tables use the R20 series of preferred numbers; imperial (inch) tables are direct conversions of the metric values.

Key topics and requirements

• Definition of applicable rotating tools (examples: reamers, screwing taps, similar parallel‑shank tools).
• Two series of dimension tables covering the complete diameter range with defined diameter steps.
• Preferred metric diameters scaled to the R20 series of preferred numbers.
• Across‑flat (driving square) sizes paired with shank diameters; inch values presented as exact conversions of metric figures.
• Clearation of nominal sizes to facilitate interchangeability, manufacturing and procurement.

Typical use and users

Tool manufacturers, tooling designers, machine shops, maintenance departments, procurement officers and standards engineers use ISO 237 when specifying shank diameters and driving-square dimensions for rotating tools. It is used to ensure dimensional compatibility between tools and tool-holding or driving equipment and to simplify parts lists and stocking policies.

Related standards

ISO 237 replaces/updates earlier ISO/R 237:1961 and is related to other ISO tool‑shank and cutting‑tool standards covering shank tapers, tool holders and related dimensions (for example, other parts of ISO series for tool shanks and holders). For example, tool‑shank/taper standards such as ISO 7388 (tool shanks for automatic tool changers) and various ISO reamer/drill standards cover complementary dimensions and applications.

Keywords

rotating tools; parallel shank; shank diameter; driving square; reamers; taps; preferred numbers; R20 series; metric to inch conversion; ISO 237:1975.

FAQ

Q: What is this standard?

A: ISO 237:1975 is an International Standard that defines preferred diameters of cylindrical (parallel) tool shanks and the matching sizes of driving squares for rotating cutting tools.

Q: What does it cover?

A: It covers dimension series and tables for shank diameters and across‑flat (driving square) sizes, with metric values scaled to the R20 preferred‑number series and inch tables given as direct conversions. It is intended for reamers, screw taps and similar tools.

Q: Who typically uses it?

A: Manufacturers of cutting tools, tool designers, machine shops, maintenance and procurement professionals, and standards/quality engineers use the standard to ensure interchangeability and to specify tooling dimensions.

Q: Is it current or superseded?

A: The 1975 edition (Edition 1) remains published and was last reviewed and confirmed by ISO in the periodic review process (the ISO record shows the publication remains current following review actions). Users should verify in the ISO catalogue or with their national standards body for any later amendments or replacements before relying on it for critical procurement.

Q: Is it part of a series?

A: ISO 237 is a standalone International Standard addressing parallel‑shank rotating tools, but it sits alongside other ISO standards for tool shanks, tool holders and cutting tools (several related ISO standards address tapers, holders and additional dimensions). See related tool‑shank standards for complementary requirements.

Q: What are the key keywords?

A: Rotating tools; parallel shank; shank diameter; driving square; reamer; tap; preferred numbers; R20; metric; inch conversions.