ISO 11148-7:2012

Overview

ISO 11148-7:2012 - Hand-held non-electric power tools - Safety requirements - Part 7: Grinders defines safety requirements for hand-held grinders driven by compressed air (pneumatic) or hydraulic power. It covers grinders used for grinding and cutting-off with abrasive products, wire brushes, diamond/reinforced wheels, flap discs and flap wheels, intended for use by one operator and supported by the operator’s hand(s) (with or without a suspension/balancer). The standard is a type‑C machine safety standard and complements general machinery safety (ISO 12100).

Key topics and technical requirements

ISO 11148-7 specifies requirements and verification procedures across core safety domains:

• Scope and limits: Applicable to abrasive products with peripheral speeds ≤ 80 m/s, cutting-off wheels ≤ 100 m/s; nominal outside diameters up to 230 mm (abrasives), 250 mm (cutting-off), and up to 450 mm for diamond/reinforced wheels.
• Mechanical safety: Design of flanges, guards, spindles and means to prevent wheel breakage and clamping failures.
• Controls and start/stop devices: Requirements for throttles, hold‑to‑run, lock‑on/lock‑off and positive on‑off devices to reduce unintentional start.
• Thermal safety: Protection against hot surfaces and thermal hazards during use.
• Noise and vibration: Measures for noise reduction and vibration emissions, including referenced test methods (e.g., ISO 15744, ISO 28927).
• Ergonomics and materials: Operator interface, handling, and hazards from materials processed or exhausted.
• Verification and testing: Prescribed tests for noise, vibration, flange deformation, guards, unintentional start and construction checks.
• Information for use: Mandatory marking, labels, warnings, instruction handbook, maintenance and operating instructions.

Practical applications

ISO 11148-7 is used to:

• Design and manufacture safe pneumatic and hydraulic handheld grinders.
• Develop compliant guards, flanges and control systems for abrasive applications.
• Create test plans and perform conformity verification (noise, vibration, mechanical tests).
• Produce compliant user manuals, maintenance instructions and product labeling.
• Support risk assessment and CE/market conformity documentation for non‑electric grinders.

Who should use this standard

• Tool manufacturers and product designers (pneumatic/hydraulic grinders)
• Safety engineers, compliance officers and certification bodies
• Test laboratories and QA teams performing noise/ vibration/guard testing
• Procurement and maintenance managers specifying safe equipment
• Occupational health & safety (OHS) professionals and trainers

Related standards

• ISO 12100 (machine safety - risk assessment)
• ISO 15744, ISO 28927 series (noise and vibration test methods)
• ISO 11148 series (other hand-held non-electric power tools)
• ISO 19432 (cutting-off machines with internal combustion engines)

Keywords: ISO 11148-7, grinders safety, hand-held non-electric power tools, pneumatic grinders, hydraulic grinders, abrasive wheels, noise reduction, vibration testing, flange and guard requirements.