IEC 63241-2-4:2024

Overview

IEC 63241-2-4:2024 supplements IEC 63241-1 and defines the dust measurement procedure specifically for hand-held sanders (excluding rotating disc-type sanders covered by IEC 63241-2-3). The document establishes test setups, operating conditions and reporting requirements to measure inhalable and respirable dust produced during sanding of gypsum and wood. It is intended for manufacturers, test laboratories and regulators focused on occupational safety and product compliance.

Key Topics

• Scope and applicability: Applies to orbital, random-orbit, reciprocating and belt sanders; rotating disc-type sanders are excluded. The standard is to be used in conjunction with IEC 63241-1:2023.
• Test materials and set-up:
  • Gypsum blocks per EN 12859:2011 (dense CaSO4·2H2O) mounted on an A-support with specified arrangement and inclination.
  • Wood tests use beech blocks or oak parquet for floor sanding with controlled moisture (≤12%).
• Operating conditions:
  • Sanding paper: typically P80 grain (suitable for the tested material); replaced after each test cycle.
  • Feed force for wood: (30 ± 5) N for tools < 1.5 kg, (50 ± 5) N for tools ≥ 1.5 kg.
  • Wooden floor sanding: constant tool movement at 20–25 m/min.
  • Minimum collected material for gypsum tests: 1 500 g for plate diameters ≤140 mm, 2 000 g for larger diameters (exceptions apply for very small plate areas).
• Instrumentation and sampling: Instrumentation and sampling follow IEC 63241-1; dust fractions include inhalable and respirable fractions measured and reported as mean values in mg/m3.
• Reporting requirements: Test reports must include material properties (type, composition, hardness), operating conditions, and mean dust concentrations calculated across all samplers and test cycles.

Applications

• Supports product development by quantifying dust emissions for hand-held sander designs and dust extraction systems.
• Provides a testing protocol for conformity assessment, safety labeling and regulatory submissions related to worker exposure and tool performance.
• Enables comparative testing across models and manufacturers to evaluate dust control efficiency and reduce occupational exposure to hazardous dust.

Related Standards

• IEC 63241-1:2023 - General requirements for dust measurement procedures for electric motor-operated tools.
• IEC 63241-2-3: (under preparation) - Particular requirements for rotating disc-type sanders.
• EN 12859:2011 - Gypsum blocks definitions, requirements and test methods (referenced for gypsum test material).

This part of the IEC 63241 series provides a practical, reproducible method for measuring dust from hand-held sanders, helping stakeholders ensure safer use, effective dust extraction, and regulatory compliance.