ISO 22881:2004

Overview

ISO 22881:2004 - Castors and wheels - Requirements for use on manually propelled equipment for institutional applications - specifies technical requirements, dimensions and test procedures for castors and wheels intended for manual use in institutional environments (for example, shops, restaurants, hotels, educational buildings and hospitals). The standard covers components that may include braking and/or locking devices, and defines acceptance criteria to ensure safe, reliable performance in everyday institutional use.

Key topics and technical requirements

• Dimensions and classification
  • Defines fixing systems (top plate, solid stem, single-bolt fixing), offset, wheel diameter, hub width and bore dimensions.
  • Wheel diameter tolerance: ±1% (min ±1 mm). Hub width tolerance: −2% (min 1 mm).
• Fixing systems
  • Rectangular and square top-plate sizes and bolt-hole spacings are specified; solid stem length and single-bolt diameters are included for compatibility with common fittings.
• Offset and load capacity
  • Minimum and maximum swivel offset values are tabulated by wheel diameter. Load capacity is defined as the maximum load (in newtons) that meets the acceptance criteria.
• Testing requirements
  • Test methods reference ISO 22878 (test apparatus and methods). Key tests include:
    • Initial and final wheel play and swivel play (maximum allowable play values are provided).
    • Electrical resistance testing for conductive and antistatic castors/wheels, with defined resistance limits.
    • Fatigue testing for braking/locking devices (number and frequency of locking actions), plus efficiency checks for wheel and swivel brakes/locks.
    • Static and dynamic strength tests and conformity/marking requirements.
• Marking
  • Product marking requirements, including marking for electrically conductive or antistatic components.

Practical applications

ISO 22881:2004 is practical for:

• Manufacturers and designers specifying castors/wheels for trolleys, carts, beds, service equipment and furnishing used in institutional settings.
• Product testing labs and conformity assessors verifying dimensions, load capacity and braking/locking durability.
• Procurement and facility managers who must ensure safe, standardized mobility components for hospitals, hotels, schools and retail environments.
• Safety and compliance officers establishing maintenance and replacement schedules based on standardized acceptance criteria.

Who uses this standard

• Castor and wheel manufacturers
• Industrial designers and mechanical engineers
• Test laboratories and certification bodies
• Facility managers, procurement teams and safety compliance personnel

Related standards

• ISO 22877 - Castors and wheels: vocabulary, symbols and multilingual terminology
• ISO 22878:2004 - Castors and wheels: test methods and apparatus

Keywords: ISO 22881, castors and wheels, institutional applications, manually propelled equipment, braking and locking devices, testing requirements, load capacity, antistatic, electrical resistance.