BS EN 22768-1:1993, ISO 2768-1:1989

BS EN 22768-1:1993 - General Tolerances

Precise Dimensional Accuracy for Manufacturing and Assembly

BS EN 22768-1:1993, also known as ISO 2768-1:1989, is a fundamental British and international standard that specifies general tolerances for linear and angular dimensions without individual tolerance indications. This standard provides a comprehensive framework for achieving consistent, reliable, and compliant dimensional accuracy in a wide range of manufacturing and assembly applications.

Ensuring Precise Fit and Interchangeability

Developed by the International Organization for Standardization (ISO), this standard defines a series of tolerance classes that can be readily applied to engineering drawings and technical specifications. By adhering to the guidelines set forth in BS EN 22768-1, manufacturers can ensure that components and assemblies meet the necessary dimensional requirements for proper fit, function, and interchangeability.

Comprehensive Tolerance Classes

• The standard outlines six tolerance classes, ranging from 'coarse' to 'fine', allowing for the selection of appropriate dimensional tolerances based on the specific application and required level of precision.
• Tolerance classes include: Coarse (c), Medium (m), Fine (f), Very Fine (vf), Extra Fine (ef), and Extra Extra Fine (eef).
• Each tolerance class is further divided into sub-classes for linear and angular dimensions, providing a high degree of flexibility in addressing diverse manufacturing needs.

Benefits of Compliance

• Consistent, reliable, and repeatable dimensional accuracy, enabling efficient manufacturing and assembly processes.
• Improved product quality and performance, ensuring a precise fit between components and assemblies.
• Enhanced interchangeability, allowing for the substitution of parts without compromising function or safety.
• Compliance with legal and regulatory requirements, demonstrating a commitment to quality and safety standards.
• Cost savings through reduced rework, scrap, and warranty claims.

Achieving Compliance

BS EN 22768-1:1993 is an essential reference for manufacturers, engineers, and quality professionals across a wide range of industries, including aerospace, automotive, and industrial machinery. By incorporating the guidelines and tolerance classes outlined in this standard, organisations can ensure their products meet the highest standards of dimensional accuracy and quality.