ISO 13050-2022 PDF

Full title and description

ISO 13050:2022 — Synchronous belt drives — Metric pitch, curvilinear profile systems G, H, R and S, belts and pulleys. This International Standard defines the principal dimensional and quality characteristics for metric-pitch curvilinear synchronous endless belts and their mating pulleys used where positive indexing or synchronized power transmission is required.

Abstract

The standard specifies the principal belt and pulley characteristics for G, H, R and S curvilinear profile systems, including nominal belt tooth dimensions, belt tooth pitch spacing, belt length and width dimensions and tolerances, belt length measurement methods, pulley groove dimensions and tolerances, pulley diameter and width dimensions and tolerances, and pulley quality specifications.

General information

• Status: Published.
• Publication date: 14 March 2022.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 21.220.10 (Belt drives and their components).
• Edition / version: 3rd edition (2022).
• Number of pages: 56 pages.

(General information above derived from the ISO catalogue entry and related product metadata.)

Scope

ISO 13050:2022 applies to metric-pitch curvilinear synchronous endless belts and corresponding pulleys in profile systems G, H, R and S used in synchronous belt drives for mechanical power transmission and where positive indexing or synchronization is required. The standard establishes dimensional definitions, tolerance limits, measurement methods and basic quality requirements needed for interchangeability and correct assembly.

Key topics and requirements

• Definitions of profile systems G, H, R and S and associated tooth geometries.
• Nominal belt tooth dimensions and belt tooth pitch spacing requirements.
• Belt length and width dimensions with specified tolerances and length-measurement procedures.
• Pulley groove geometry, diameter and width dimensions, and tolerance specifications.
• Pulley quality and finish criteria relevant to synchronous operation and longevity.
• Requirements and methods to ensure correct mating of belts and pulleys for positive indexing.

Typical use and users

Used by synchronous belt and pulley manufacturers, mechanical designers and OEMs, drivetrain and automation equipment engineers, quality and inspection laboratories, procurement/specification writers, and maintenance teams to ensure dimensional compatibility, performance and interchangeability of timing/synchronous belt drive components. ISO/TC 41 (Synchronous belt drives) provides the technical oversight for these standards.

Related standards

ISO 13050:2022 supersedes earlier editions (ISO 13050:2014 and ISO 13050:1999) and sits alongside other synchronous-belt standards produced under ISO/TC 41/SC 4 (for example, standards covering automotive synchronous belts and other belt/pulley quality specifications). Refer to the ISO catalogue for the committee’s complete published and in‑development documents.

Keywords

Synchronous belt drives; curvilinear toothed belts; metric pitch; G profile; H profile; R profile; S profile; timing belt; pulley groove; pitch length; tolerances; ISO 13050.

FAQ

Q: What is this standard?

A: ISO 13050:2022 is an International Standard that specifies dimensional, tolerance and quality requirements for metric-pitch curvilinear synchronous endless belts and mating pulleys in G, H, R and S profile systems.

Q: What does it cover?

A: It covers nominal tooth geometry, pitch spacing, belt length and width dimensions and tolerances, methods for measuring belt length, pulley groove geometry, pulley diameter and width tolerances, and pulley quality specifications necessary for positive-indexing synchronous drives.

Q: Who typically uses it?

A: Manufacturers of belts and pulleys, OEM design and engineering teams, quality/inspection labs, procurement/specification authors and maintenance engineers implementing or servicing synchronous belt drive systems.

Q: Is it current or superseded?

A: ISO 13050:2022 is the current published edition (published March 2022) and it supersedes the 2014 and 1999 editions which are withdrawn.

Q: Is it part of a series?

A: It is part of the ISO work programme on belt and pulley standards maintained by ISO/TC 41 and its SC 4 subcommittee (Synchronous belt drives); related ISO standards address automotive belts, pulley quality and other belt-drive topics.

Q: What are the key keywords?

A: Synchronous belt, curvilinear tooth, metric pitch, G/H/R/S profile, timing belt, pulley groove, pitch length, tolerances, ISO 13050.