GOST 9369-77 PDF

Full title and description

GOST 9369-77 — "Передачи глобоидные. Основные параметры" (English: "Globoid gear pairs. Basic parameters"). The standard defines basic geometric and dimensional parameters, nominal values and preferred series for orthogonal globoid (globoid worm) gear pairs used in reducers and similar gear assemblies.

Abstract

This short standard specifies the principal parameters and preferred series for globoid (globoid worm and wheel) gear pairs: designation of basic dimensions, nominal values, permissible deviations and recommended tabulated values for common sizes used in gear reducers. It is intended to ensure interchangeability and to provide unified basic parameters for design and manufacture.

General information

• Status: Active / действующий (listed in standards catalogues as the current text of GOST 9369-77).
• Publication date: Commonly listed publication/issue date: 1 July 1979 (designation year 1977; official printed editions and reprints published in the early 1980s).
• Publisher: State Committee for Standards of the USSR (Gosstandart) — Published by the Publishing House of Standards, Moscow (official printed edition).
• ICS / categories: Gear standards classification — ICS 21.200 (gears; gearings) and internal library/classification codes shown on the standard cover (e.g., DK/UDC 621.833).
• Edition / version: GOST 9369-77 (designation year 1977); official printed/reprinted editions available (noted reprint March 1983 in official imprint).
• Number of pages: 4 pages (short standard / leaflet length).

Key bibliographic and cover details (publisher imprint, edition notes and tables) are visible on official scans and standards catalog entries.

Scope

The standard applies to orthogonal globoid gear (globoid worm and wheel) transmissions used in reducers, including combined reducer assemblies, and establishes their basic geometric parameters and preferred sizes. It explicitly excludes globoid transmissions designed for special-purpose or unusual configurations. The scope is focused on standardization of dimensions and basic interchangeability parameters rather than detailed strength or material requirements.

Key topics and requirements

• Definitions and designation of globoid (worm) gear pair parameters (modules, pitch diameters, face widths, numbers of threads/teeth).
• Preferred (preferred-series) nominal values and tabulated sizes for key dimensions to simplify manufacture and interchangeability.
• Permissible deviations and notes on selection (for example, recommendations to prefer values without brackets; allowable deviation of actual ratio from nominal not to exceed a specified percent in normal practice).
• Tables giving standard values for dividing diameters, widths and related dimensional series for several nominal size groups.
• Normative references to other GOSTs used for related dimensions, tolerances and methods (listed in the standard's references section).

Typical use and users

Mechanical engineers and designers of gear reducers, manufacturers of worm and globoid gear sets and gearbox assemblies, tooling and machine shops producing standard gear components, maintenance and repair specialists, and standards libraries/technical documentation groups use this standard as a design and specification reference for selecting standard dimensions and ensuring interchangeability of globoid gear pairs.

Related standards

GOST 9369-77 replaces and updates the earlier GOST 9369-66. The standard includes normative references to other GOSTs governing related dimensions, tolerances and test/measurement methods (examples cited in the text include related gear and dimensional standards). For broader gear standardization, see related GOSTs on worm and bevel gear interchangeability and tolerances.

Keywords

GOST 9369-77; globoid gear; globoid worm; worm gear pair; basic parameters; preferred sizes; gear reducers; interchangeability; gear dimensions.

FAQ

Q: What is this standard?

A: GOST 9369-77 is a USSR/ Russian state standard titled "Передачи глобоидные. Основные параметры" (Globoid gear pairs. Basic parameters) that sets out basic dimensional parameters and preferred series for globoid (worm and wheel) gear pairs.

Q: What does it cover?

A: It covers principal geometric and dimensional parameters, recommended nominal values and tables for commonly used sizes of orthogonal globoid gear pairs used in reducers, and provides guidance to promote interchangeability of components.

Q: Who typically uses it?

A: Gearbox and mechanical designers, manufacturers of worm and globoid gearsets, maintenance engineers, and technical documentation/standards departments use it as a reference for standard dimensions and selection of nominal sizes.

Q: Is it current or superseded?

A: Standards catalogs and document suppliers list GOST 9369-77 as the active text of that designation (GOST 9369-77) and show it as the replacement of the 1966 edition (GOST 9369-66). Users should confirm the current legal/registry status with their national standards body or an up-to-date national catalog if absolute currency is required for regulatory or procurement purposes.

Q: Is it part of a series?

A: Yes — it is part of the family of GOST standards addressing gears, worm drives and interchangeability (neighboring and related GOST numbers cover fine-pitch bevel gears, worm gear tolerances and other gear types). It follows earlier editions of the same designation (for example, 9369-66) and is cross-referenced with other gear-related GOSTs in its normative references.

Q: What are the key keywords?

A: Globoid gear, worm gear pair, basic parameters, preferred series, dimensions, gear reducers, GOST 9369-77.