ISO 3548-1:2022/Amd 1:2024

Overview

ISO 3548-1:2022/Amd 1:2024 is the latest amendment to the International Standard for plain bearings, specifically focusing on thin-walled half bearings with or without flange. This amendment updates the specifications regarding tolerances, design features, and test methods to ensure higher precision, consistency, and reliability in bearing manufacturing and application. Developed by ISO Technical Committee ISO/TC 123, Subcommittee SC 3, this standard is integral to industries utilizing bearing components for mechanical movement and load support.

The standard enhances the existing framework established in ISO 3548-1:2022 by refining definitions, updating terminology, revising measurement methods, and clarifying inspection procedures. It supports industry needs for better quality control, predictive maintenance, and compatibility across various bearing applications.

Key Topics

• Tolerances: Defines precise dimensional tolerances for thin-walled half bearings, including crush height and joint face specifications to ensure proper fit and function.
• Design Features: Introduces critical features such as flange reliefs, sliding surface relief, scalloped toes, and eccentric bearing bores to optimize bearing performance and manufacturing efficiency.
• Terminology Updates: Adds important terms like sliding surface, joint face relief, assembled flange, and crown to align technical language with current industry practices, based on definitions from ISO 4378-1.
• Test Methods: Describes standardized methods for measuring dimensional accuracy, checking crush heights, and verifying side clearance via dial gauges and metering bars, referencing updated figures and procedural illustrations.
• Assembly Considerations: Details assembly-related design aspects such as housing recesses and flange faces to improve load distribution and minimize stress during operation.

Applications

ISO 3548-1:2022/Amd 1:2024 is essential for a range of engineering and manufacturing sectors where plain bearings are critical components. Typical applications include:

• Automotive Engineering: Ensuring precise bearing tolerances for engines, transmissions, and crankshafts to improve vehicle reliability and efficiency.
• Heavy Machinery: Supporting robust construction equipment and industrial machines with bearings that withstand high loads and demanding environments.
• Aerospace: Facilitating precise bearing designs that meet strict safety and durability standards for aircraft systems.
• Manufacturing Industries: Streamlining production quality controls for bearing producers and suppliers, enhancing interchangeability and reducing operational downtime.
• Renewable Energy: Contributing to wind turbine and hydroelectric equipment longevity by providing standardized bearing specifications that optimize rotational components.

Implementing this amendment helps engineers and quality assurance teams maintain compliance with international best practices, reduce mechanical failures, and extend service life of bearing assemblies.

Related Standards

• ISO 3548 Series: Other parts of the ISO 3548 collection complement this standard, addressing different types of plain bearings and related dimensions.
• ISO 4378-1: Provides essential terms, definitions, classification, and symbols relevant to plain bearing design and materials referenced by this amendment.
• ISO/IEC Directives, Part 1 & 2: Offer guidelines on the processes for standard development, maintenance, and editorial rules referenced throughout the document.
• Industry-specific standards: Depending on application, ISO 3548-1:2022/Amd 1 integrates with sector-specific guidelines such as automotive or aerospace bearing standards to ensure holistic system compatibility.

Utilizing ISO 3548-1:2022/Amd 1:2024 supports engineers and manufacturers in achieving precision bearing design, reducing tolerances deviations, and following rigorous test methods that underpin the functionality and durability of thin-walled half bearings. This contributes directly to better performance and safety across many mechanical systems worldwide.