Overview
ISO 22882:2016 - Castors and wheels - Requirements for castors for hospital beds - defines the technical requirements, principal dimensions and testing requirements for swivel castors for hospital beds. It applies to castors with a wheel diameter of 100 mm or more that feature a central locking device. The standard helps ensure safety, durability and consistent performance for hospital-bed mobility and braking systems.
Key topics and requirements
- Scope and applicability
- Covers swivel castors used on hospital beds with central locking and wheel diameters ≥ 100 mm.
- Dimensions and classification
- Specifies principal dimensions such as wheel diameter, overall height, offset, and fixing system (stem length, stem diameter, thread size, hexagon hole dimensions).
- Typical wheel diameters referenced: 100, 125, 150, 200, 250 mm with corresponding overall heights and offsets.
- Load capacity
- Defines how maximum load (in newtons) is stated and verified so castors meet acceptance criteria under specified tests.
- Testing requirements
- Test methods and apparatus are referenced from ISO 22878.
- Environmental test conditions: temperature 15 °C to 28 °C and relative humidity 40%–70% for 24 h prior to testing.
- Required tests include:
- Initial and final wheel play and swivel play
- Electrical resistance (antistatic/electrically conductive castors)
- Fatigue test for locking/braking devices
- Efficiency checks for wheel and swivel braking/locking
- Static and dynamic load tests
- Acceptance criteria, tolerances and test sequences are defined to verify conformity.
- Marking and conformity
- Requirements for product marking and identification of electrically conductive/antistatic castors are specified.
Applications - who uses ISO 22882
- Manufacturers and designers of hospital beds and medical furniture to ensure castors meet safety, dimensional and performance requirements.
- Quality and test laboratories that perform conformity testing and certification using the specified test methods.
- Procurement and facilities managers in hospitals who need to verify that castors meet clinical safety and antistatic requirements (e.g., operating rooms).
- Regulatory and compliance teams ensuring products conform to international standards for medical equipment mobility.
Related standards
- ISO 22878 - Castors and wheels - Test methods and apparatus (referenced for test procedures)
- ISO 22877 - Terms and definitions used for castors and wheels
- ISO 22881 - Non-central locking castors used in hospital beds (for products without central locking)
ISO 22882 is essential for ensuring reliable, safe and testable castors for hospital beds - improving patient safety, equipment longevity and regulatory compliance.