ISO 11677-1:1994

Overview

ISO 11677-1:1994 specifies the main dimensions and dimensional tolerances for flat steel healds with open end loops - specifically C-shaped end loops - used in textile machinery. The standard defines measurements in millimetres and provides diagrams (figure 1) and a table of primary dimensions (table 1) covering cross-section, thread eye geometry and spacing between end loops. Its purpose is to ensure consistent manufacturing, interchangeability and quality control for heald components used in weaving and related fabric-manufacturing equipment.

Key Topics

• Scope: Main dimensions and tolerances for flat steel healds with C-shaped open end loops.
• Dimensional definitions: Clear identification of critical features such as cross-section (b × s), thread eye form and orientation, and distance between end loops.
• Tolerances: Permitted manufacturing deviations for the specified dimensions to maintain compatibility and performance.
• Illustrations and tables: Figure(s) and table(s) showing measured views and numeric data (dimensions in millimetres) to guide production and inspection.
• Technical terminology: Standardized descriptors for heald geometry to reduce ambiguity in specifications and procurement.

Applications

ISO 11677-1:1994 is practical for organizations and activities that require accurate, repeatable heald components in textile machinery:

• Textile machinery manufacturers (OEMs) - to design looms and fixtures that accept standardized flat steel healds.
• Heald and accessory suppliers - to manufacture C-shaped end loop healds to recognized international dimensions.
• Maintenance and operations teams - to source compatible replacement healds and reduce machine downtime.
• Quality control and inspection - to verify parts against standardized dimensions and tolerances.
• Procurement and specification writers - to create clear purchase orders and technical specifications for woven-fabric production lines.
• CAD and tooling engineers - to model accurate parts and design jigs or dies consistent with standard geometries.

Benefits include improved interchangeability across vendors, reduced production errors, simplified inventory management for replacement parts, and easier international trade and compliance.

Related Standards

• ISO 11677-2:1994 - Main dimensions of flat steel healds with open end loops - Part 2: J-shaped end loops (companion document covering the alternate end-loop form).
• Prepared by ISO/TC 72 (Textile machinery and allied machinery and accessories), the standard fits into the broader suite of textile machinery dimension and accessory standards.

Keywords: ISO 11677-1:1994, flat steel healds, C-shaped end loops, textile machinery, heald dimensions, dimensional tolerances, loom healds, heald replacement parts.