EN 3288:1994

Overview

EN 3288:1994 is a vital European standard developed by CEN for the aerospace industry, specifying the requirements for double row self-aligning ball bearings used in airframe applications. These bearings are constructed from steel with a cadmium-plated finish, provided in diameter series 2, and are engineered to withstand slow rotations, oscillations, and swivelling under load. This standard ensures that such airframe rolling bearings consistently deliver optimal performance and safety in demanding aviation environments, operating reliably within a temperature range from -54°C to 150°C.

Key Topics

• Bearing Type: Double row self-aligning ball bearings
• Material Specification: High-grade steel, cadmium plated for enhanced corrosion resistance
• Application Range: Suitable for slow rotational movements, oscillations, and swivelling
• Size Series: Diameter series 2 - standardized dimensions and interface
• Load and Performance: Defined load ratings and operational limitations
• Temperature Range: Operable from -54°C up to 150°C
• Installation: Intended for use between moving and fixed sections within aircraft structures and control mechanisms

Applications

Airframe rolling bearings as specified in EN 3288:1994 are fundamental components in aerospace construction, delivering precise and durable movement solutions. Key application areas include:

• Aircraft Structures: Used where controlled movement between fixed and moving parts is necessary, such as fuselage assemblies, control surfaces, landing gear mechanisms, and wing flaps.
• Flight Control Mechanisms: Facilitates smooth oscillation or swivelling motion in control linkages, actuator assemblies, or other flight control subsystems.
• Performance in Extreme Conditions: Cadmium plating provides additional corrosion resistance, while the steel construction ensures mechanical strength, making these bearings suitable for environments exposed to both high and low temperatures commonly encountered in aviation.

Using bearings standardized by EN 3288:1994 helps manufacturers and maintenance teams select components that support structural reliability, meet strict aerospace quality requirements, and streamline supply chain operations through harmonized dimensions and load capacities.

Related Standards

Organizations and engineers working with EN 3288:1994 may also reference additional relevant standards in the aerospace series to ensure full compliance and compatibility, such as:

• EN 3290 - Specifications for different bearing series or performance classes
• EN ISO 11200 - Guidelines for general bearing testing and performance evaluation
• ISO 281 - Rolling bearing life and load calculations
• EN 3160 - Ball bearings for other diameter series or plating options
• National counterparts (e.g., SIST EN 3288:2001) - For implementation in specific countries

Adhering to harmonized international and European aerospace standards like EN 3288:1994 streamlines procurement, simplifies maintenance, and supports aircraft safety and performance objectives.