ISO 12046:2025 PDF

Name: ISO 12046:2025 — Synchronous belt drives — Automotive belts — Determination of physical properties
SKU: ISO 12046:2025
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Synchronous belt drives — Automotive belts — Determination of physical properties

Название (английский):

ISO 12046:2025

Synchronous belt drives — Automotive belts — Determination of physical properties

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 11
Дата публикации:: 9 января 2025 г.
Издание:: ISO IS 12046 edition 3 version 1
ICS:: 21.220.10

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Описание (английский):

This document specifies test methods for determining the physical properties of synchronous belts used in driving engine parts, such as camshafts, fuel injection pumps, balancing shafts. These test methods are intended to provide a means of characterizing synchronous belt properties for belts which are evaluated and qualified by dynamic laboratory and field testing.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 12046:2025 - Synchronous belt drives - Automotive belts - Determination of physical properties - specifies standardized test methods to characterize the physical properties of automotive synchronous (timing) belts used to drive engine parts (camshafts, fuel‑injection pumps, balancing shafts). The tests support laboratory and field qualification by providing repeatable measurements independent of tooth profile.

Key topics and technical requirements

Scope of tests: hardness of rubber core; tensile strength; fabric adhesion; tension‑cord adhesion; tooth shear; resistance to high/low temperature, oil, ozone and water.

Test environment & specimen conditioning: standard laboratory conditions at 25 ± 5 °C, 65 ± 20 % RH, atmospheric pressure 86–106 kPa; specimens tested ≥16 h after vulcanization and conditioned ≥1 h under standard conditions.

Specimen sizes and mounting: minimum specimen lengths specified (e.g., 100 mm for hardness/fabric tests; 250 mm for tensile tests); endless belt or cut specimens allowed.

Tensile test procedure: endless‑belt mounting on two free‑rotating flat pulleys (diameter 100–175 mm); applied extension speed 50 ± 5 mm/min; tensile strength taken as half the measured value for endless specimens (or the smaller of two cut specimens).

Rounding and reporting: results rounded per Table 2 rules (e.g., tensile strength to nearest 100 N); test report must include tooth count/pitch/profile, materials, production code, environmental conditions, apparatus and reference to ISO 12046:2025.

Normative references: incorporates ISO 48‑2 (rubber hardness), ISO 1817 (effect of liquids on rubber), and ISO 5288 (synchronous belt vocabulary).

Applications and users

ISO 12046:2025 is intended for:

Automotive component manufacturers and suppliers performing belt qualification and quality control.

Test laboratories conducting material characterization and failure analysis.

OEM engineering teams specifying belt performance for engine timing and accessory drives.

Certification bodies and procurement teams requiring consistent, comparable test data for supplier evaluation.

Practical uses include comparing belt formulations, verifying adhesion and cord integrity, assessing environmental resistance (oil/ozone/water/temperature) and supplying objective data for dynamic laboratory and field validation.

Related standards

ISO 48‑2 - Rubber hardness (Shore A, IRHD)

ISO 1817 - Effect of liquids on rubber

ISO 5288 - Synchronous belt drives - Vocabulary

Using ISO 12046:2025 ensures repeatable, internationally harmonized measurements of synchronous belt physical properties, improving reliability of belt selection, design validation and supplier qualification in automotive powertrain applications.

ISO 12046:2025 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

SIST EN ISO 4823:2025

Dentistry - Elastomeric impression and bite registration materials (ISO 4823:2025)

BS ISO 18177:2025

Plastics. Test method for estimation of the short chain branching distribution of semicrystalline ethylene 1-…

ISO 5288:2001

Synchronous belt drives — Vocabulary