ISO 11749:2023 PDF

Belt drives — V-ribbed belts for the automotive industry — Fatigue test

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Title (English):

ISO 11749:2023

Belt drives — V-ribbed belts for the automotive industry — Fatigue test

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 14
Publication date:: November 2, 2023
Edition:: ISO IS 11749 edition 3 version 1
ICS:: 21.220.10

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Description (English):

This document specifies a dynamic test method for the quality control of V-ribbed belts (PK profile) which are used predominantly for accessory drive applications in the automotive industry. The dimensional characteristics of the belts and of corresponding pulleys are the subject of ISO 9981.

Technical details

Technical committee: ISO/TC 41/SC 1 - Friction
SKU: ISO 11749:2023

Abstract

Overview - ISO 11749:2023 (V-ribbed belts fatigue test)

ISO 11749:2023 specifies a dynamic fatigue test method for quality control of V-ribbed belts (PK profile) used mainly in automotive accessory drives. The standard defines test machine layouts (two-, three- and four-pulley configurations), test conditions, measurement requirements and reporting details to determine belt life under specified load, speed and tensioning conditions. Dimensional characteristics of belts and pulleys are covered separately by ISO 9981.

Key topics and technical requirements

Test principle: Dynamic endurance testing on robust test machines to determine when a belt fails to meet agreed performance criteria (power transmission, slip, retensioning cycles).
Machine layouts: Acceptable configurations for two-, three- and four-pulley test rigs, with alignment tolerances and guidance on which belt lengths fit each layout.
Tensioning methods: Procedures for tests with fixed belt tensioning force and with constant belt tensioning force (newly clarified in the 2023 edition).
Pulley specifications:
- Test pulleys made of steel with surface hardness ~55 HRC.
- Pulley groove surface roughness R

Related standards

Mentioned in the description and other ISO standards

Overview - ISO 11749:2023 (V-ribbed belts fatigue test)

Key topics and technical requirements

Test principle: Dynamic endurance testing on robust test machines to determine when a belt fails to meet agreed performance criteria (power transmission, slip, retensioning cycles).
Machine layouts: Acceptable configurations for two-, three- and four-pulley test rigs, with alignment tolerances and guidance on which belt lengths fit each layout.
Tensioning methods: Procedures for tests with fixed belt tensioning force and with constant belt tensioning force (newly clarified in the 2023 edition).
Pulley specifications:
- Test pulleys made of steel with surface hardness ~55 HRC.
- Pulley groove surface roughness R

ISO 11749:2023 PDF

Technical details

Abstract

Overview - ISO 11749:2023 (V-ribbed belts fatigue test)

Key topics and technical requirements

Related standards

Abstract

Overview - ISO 11749:2023 (V-ribbed belts fatigue test)

Key topics and technical requirements

Related standards

Belt drives - Pulleys and V-ribbed belts for the automotive industry - PK profile: Dimensions

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