ISO 21182:2025

Overview

ISO 21182:2025 - "Light conveyor belts - Determination of the coefficient of friction" specifies standardized test methods to measure the dynamic and static coefficients of friction for light conveyor belts (in support of ISO 21183-1). This third edition updates procedures and adds test room conditions to ensure reproducible results for comparative friction testing between belt covers and a metallic reference panel.

Key topics and technical requirements

• Scope and purpose
  • Test methods for dynamic (μD) and static (μS) coefficients of friction to compare belt covers reliably.
  • Limits: dynamic μ up to 1.0, static μ up to 1.5 (higher values may indicate other effects).
• Apparatus and test panel
  • Metallic test panel: steel CR1 (ISO 3574), thickness 0.8 mm; width (76 ± 0.5) mm; length 152 mm; testing area ≈100 cm2.
  • Panel hardness HRB 60–70; surface roughness Ra 0.9–1.3 µm (ISO 21920-2). Replace after max 50 uses or one day.
  • Mass applied to panel to generate normal force (50 ± 1) N.
  • Load cell (range up to 100 N) and recording instrument; force system to comply with ISO 7500-1 (machine class 3 or better).
  • Deflection roller (40–50 mm diameter) and low-elasticity pulling cable.
• Test pieces & conditioning
  • Three test pieces (600 mm × 100 mm) cut full thickness in longitudinal or transverse directions.
  • Condition in accordance with ISO 18573 (Atmosphere B) for at least 24 h.
• Test procedure
  • Test room: 23 °C ± 2 °C, relative humidity 50 % ± 5 %.
  • Dynamic test speed: (1 000 ± 20) mm/min (or min 500 ± 20 mm/min if machine-limited); path of motion 300 mm; use data from last 200 mm.
  • Static test speed: (100 ± 10) mm/min; stop at initial panel movement; μS derived from first force peak or deviation point.
• Results & reporting
  • Dynamic μD: median of dynamic frictional force divided by normal force (use ISO 6133 guidance).
  • Report individual measurements (rounded to two decimals), arithmetic mean, belt identification, date of manufacture, and reference to ISO 21182:2025.

Applications - who uses this standard

• Belt manufacturers and R&D teams for material development and quality control.
• Independent testing laboratories and QA departments validating friction properties.
• Specifiers and buyers selecting light conveyor belts for packaging, intralogistics, or handling systems where controlled sliding or anti-slip behavior matters.
• Procurement, compliance and warranty assessment to provide consistent, comparable friction data.

Related standards

• ISO 21183-1 (light conveyor belt classification/requirements)
• ISO 18573 (test atmospheres and conditioning)
• ISO 3574 (cold‑reduced carbon steel sheet)
• ISO 21920-2 (surface texture parameters)
• ISO 7500-1 (force-measuring system calibration)
• ISO 6133 (statistical treatment guidance)

Keywords: ISO 21182:2025, light conveyor belts, coefficient of friction, dynamic coefficient of friction, static coefficient of friction, friction testing, metallic test panel, conveyor belt testing.