Overview
SIST ISO 3547-5:2021 is an international standard developed by the International Organization for Standardization (ISO) that focuses on plain bearings-specifically, wrapped bushes. This part of the ISO 3547 series outlines methods for checking the outside diameter of wrapped bushes, referencing procedures and equipment used to ensure precise measurement in line with quality assurance standards. The document also addresses common sources of error during measurement and relates to other key parts of the ISO 3547 standard series.
Ensuring the outside diameter of wrapped bushes is essential for achieving the required mounting compression and fit within a housing bore, thus supporting the reliability and lifespan of plain bearings in a wide range of engineering applications.
Key Topics
- Purpose of Checking
- Verifies the outside diameter to ensure correct interference fit and proper mounting.
- Measurement Methods
- Method A: Uses a split checking block and setting plugs with controlled load for indirect measurement, suitable for precision checking.
- Method B: Utilizes “GO” and “NO GO” ring gauges as a pass/fail check, ideal for production environments.
- Method D: Employs a precision measuring tape for bushes with outside diameters above 120 mm.
- Selection of Method
- Choice depends on the bush diameter and required measurement precision.
- Measuring Equipment
- Specific configurations and calibration requirements for checking blocks, setting plugs, and ring gauges.
- Guidelines for handling and maintaining equipment to avoid errors.
- Factors Affecting Accuracy
- Equipment alignment, calibration, operator handling, the physical condition of bushes, and the environmental conditions during measurement.
Applications
SIST ISO 3547-5:2021 is essential for industries and sectors where plain bearings and wrapped bushes are used, such as:
- Automotive Manufacturing: Verification of bush dimensions for engines, suspensions, and transmission systems.
- Industrial Machinery: Quality control of bearing components in large-scale equipment.
- Aerospace: Ensuring reliability and performance in demanding applications.
- Quality Assurance Laboratories: Implementation of standardized testing for compliance and certification purposes.
- Bearing Manufacturers: Consistency in mass production and conformity to international specifications.
Having standardized procedures for checking the outside diameter of wrapped bushes helps manufacturers, suppliers, and end-users achieve robust quality control, reduce assembly issues, and ensure product compatibility across global markets.
Related Standards
SIST ISO 3547-5:2021 should be used in conjunction with several related international standards for comprehensive quality assurance:
- ISO 3547-1: Plain bearings - Wrapped bushes - Part 1: Dimensions
- ISO 3547-2: Plain bearings - Wrapped bushes - Part 2: Test data for outside and inside diameters
- ISO 3547-6: Plain bearings - Wrapped bushes - Part 6: Checking the inside diameter
- ISO 3547-7: Plain bearings - Wrapped bushes - Part 7: Measurement of wall thickness of thin-walled bushes
- ISO 286-2: Geometrical product specifications (GPS) - ISO code system for tolerances on linear sizes
- ISO 1938-1: Geometrical product specifications (GPS) - Dimensional measuring equipment
These related standards collectively support the design, production, and inspection of wrapped bushes and plain bearings, enabling reliable operation in mechanical assemblies worldwide.
Keywords: SIST ISO 3547-5:2021, wrapped bushes, plain bearings, checking outside diameter, measurement methods, quality assurance, bearing standards, ISO standards, engineering manufacturing, bearing inspection.