Overview
ISO 1082:1990 - "Mining - Shackle type connector units for chain conveyors" specifies requirements for shackle-type connector units used in mining chain conveyor assemblies. This second edition replaces the 1984 edition and defines the connector components (shackle, connector bolt, connector nut), material and heat-treatment criteria, dimensional compatibility with chains and scraper bars, and test and inspection procedures. It is intended to ensure interchangeability with chains complying with ISO 610 and scraper bars complying with ISO 5612.
Key Topics and Requirements
- Scope and components: Connector units comprise a shackle-type connector, connector bolt and connector nut. Designed for use with nominal chain sizes (examples: 14×50, 18×64, 22×86, 24×86 / 24×87.5, 26×92).
- Material and heat treatment: Steel must be fully killed, forgeable and not prone to embrittlement; connectors require heat treatment (including heating above the steel’s Ac3).
- Workmanship and surface: Finished connectors must be sound and free from cracks, laminations and harmful defects; normally supplied unpolished and uncoated unless agreed otherwise.
- Dimensions and compatibility: Detailed dimensional tables ensure correct mating with sprockets, scraper bars and conveyor pans; connector geometry adapts to long/short leg configurations as ordered.
- Bolts and nuts: Thread sizes, mechanical property classes (e.g., 8.8 / 10.9) and tightening torques are specified to ensure secure assembly.
- Testing and sampling:
- Dimensional verification and a static tensile test (with prescribed setting/test/breaking forces by nominal size).
- Elongation measurements (percentage) at set forces and after fracture; permanent elongation criteria provided.
- Optional fatigue (endurance) test: repeated loading at 200–1 000 cycles/min (check at 500 cycles/min) with an acceptance criterion commonly set to ≥ 40 000 cycles (or other levels by purchaser-manufacturer agreement).
- Testing machines and calibration per ISO 7500-1 (class 1) or equivalent.
- Marking and documentation: Identification marking on connectors, inspection marking on accepted lots, and optional test certificates signed by manufacturer/inspector.
Applications and Users
ISO 1082 is used to:
- Ensure interchangeability and safe performance of connector units in mining chain conveyors.
- Support procurement, quality control and inspection of conveyor components.
- Guide design selection for conveyor OEMs, maintenance engineers, mine operators, component manufacturers and testing/inspection bodies.
Typical applications include drag conveyors, scraper conveyors and coal-handling chain assemblies where reliable connector performance, dimensional compatibility and traceable test documentation are required.
Related Standards
- ISO 610: High-tensile steel chains (round link) for chain conveyors and coal ploughs
- ISO 5612: Mining - Scraper bars for chain conveyors
- ISO 7500-1: Verification of static uniaxial testing machines - Tensile testing
Keywords: ISO 1082, mining equipment, chain conveyors, shackle connectors, connectors, specifications, dimensions, tensile test, fatigue test, marking, ISO 610, ISO 5612.