SIST EN 3290:2001

Aerospace series - Bearings, airframe rolling - Single row self-aligning roller bearings in steel - Diameter series 3 and 4 - Dimensions and loads

This scope specifies the characteristics of single row self-aligning roller bearings in steel of diameter series 3 and 4 designed to withstand only slow rotations, oscillations and/or swivelling under load. They are intended for use between fixed and moving parts of the aircraft structure and their control mechanisms.

Luft- und Raumfahrt - Flugwerklager - Einreihige Tonnenlager - Einreihige Tonnenlager aus Stahl - Durchmesserreihen 3 und 4 - Maße und Belastungen

Diese Norm legt die Eigenschaften von einreihigen Tonnenlagern aus Stahl der Durchmesserreihen 3 und 4 fest, die so ausgelegt sind, dass sie unter Belastung nur langsamen Dreh-, Schwenk- und/oder Pendelbewegungen standhalten. Sie sind zur Verwendung zwischen starren und beweglichen Flugwerkteilen und deren Steuerungseinrichtungen vorgesehen.

Série aérospatiale - Roulements pour structures d'aéronefs - Roulements en acier, a rotule, sur une rangée de rouleaux - Séries de diametres 3 et 4 - Dimensions et charges

La présente norme spécifie les caractéristiques des roulements en acier, à rotule, sur une rangée de rouleaux, séries de diamètres 3 et 4 conçus pour supporter en charge uniquement des rotations lentes, des oscillations et/ou des rotulages faibles. Ils sont destinés à être utilisés entre les éléments fixes et mobiles de la structure des aéronefs et de leurs mécanismes de commande.

Aerospace series - Bearings, airframe rolling - Single row self-aligning roller bearings in steel - Diameter series 3 and 4 - Dimensions and loads

General Information

• Status: Published
• Publication Date: 31-Dec-2000
• ICS: 49.035 - Components for aerospace construction
• Technical Committee: SS SPL - Technical Board for the general field
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jan-2001
• Due Date: 01-Jan-2001
• Completion Date: 01-Jan-2001
• Ref Project: EN 3290:1994 - Aerospace series - Bearings, airframe rolling - Single row self-aligning roller bearings in steel - Diameter series 3 and 4 - Dimensions and loads

Overview

SIST EN 3290:2001 is a European standard published by CEN that defines the specifications for aerospace bearings used in airframe rolling applications. Specifically, it covers single row self-aligning roller bearings made of steel, belonging to diameter series 3 and 4. These bearings are designed for aerospace structures and control mechanisms where the bearings must support slow rotations, oscillations, or swiveling under load. The standard details their dimensions and load capacities, ensuring reliable performance and interchangeability within the highly demanding aerospace environment.

Key Topics

• Bearing Type: Single row self-aligning roller bearings in steel
• Diameter Series: Series 3 and Series 4
• Intended Motion: Slow rotations, oscillations, swiveling under load
• Application Area: Used between fixed and moving parts of aircraft structures and control mechanisms
• Dimensions and Loads: Standardized bearing dimensions and load ratings to ensure compatibility and performance
• Material Requirements: High-quality steel suitable for aerospace conditions
• Self-Alignment Feature: Design allowing angular misalignment without compromising bearing function

Applications

SIST EN 3290:2001 bearings are vital components in aerospace engineering and manufacturing. Their applications include:

• Aircraft Airframe Structures: Facilitating smooth and reliable movement between fixed and movable parts such as wing flaps, control surfaces, and landing gear mechanisms
• Control Mechanisms: Supporting oscillatory or swiveling motions in flight control systems
• Slow Speed Rotational Components: Ensuring durability and precise operation where bearing speeds are low and loads are significant
• Maintenance and Repair: Bearings constructed per EN 3290 enable standardized replacements and repairs, reducing downtime and maintaining airworthiness
• Safety-Critical Aerospace Systems: Providing dependable mechanical support in environments subject to vibration, stress, and variable motion

Related Standards

SIST EN 3290:2001 complements other aerospace bearing and component standards, including but not limited to:

• EN 3291 series: Related aerospace rolling bearings for different designs or load conditions
• ISO Aerospace Bearing Standards: Providing overarching guidelines for bearing manufacturing quality and testing
• CEN Aerospace Component Standards: Integrating bearing specifications into broader airframe structural requirements
• Material Standards for Aerospace Steel: Ensuring compatibility of bearing steels with aerospace environmental and mechanical demands

Practical Value

Adhering to SIST EN 3290:2001 ensures that aerospace engineers and manufacturers have access to bearings with guaranteed dimensions and performance characteristics suitable for slow-motion aerospace applications. The standard facilitates:

• Interchangeability between parts from different suppliers due to dimensional consistency
• Reliability and safety in critical airframe structures
• Optimized design of bearing seatings in aircraft components
• Reduction of wear and maintenance costs as bearings manage oscillation and swiveling loads effectively

Implementing EN 3290 compliant bearings contributes to the robustness and longevity of aerospace systems, crucial in the demanding operational environment of aircraft engineering.

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2001
Aerospace series - Bearings, airframe rolling - Single row self-aligning roller
bearings in steel - Diameter series 3 and 4 - Dimensions and loads
Aerospace series - Bearings, airframe rolling - Single row self-aligning roller bearings in
steel - Diameter series 3 and 4 - Dimensions and loads
Luft- und Raumfahrt - Flugwerklager - Einreihige Tonnenlager - Einreihige Tonnenlager
aus Stahl - Durchmesserreihen 3 und 4 - Maße und Belastungen
Série aérospatiale - Roulements pour structures d'aéronefs - Roulements en acier, a
rotule, sur une rangée de rouleaux - Séries de diametres 3 et 4 - Dimensions et charges
Ta slovenski standard je istoveten z: EN 3290:1994
ICS:
49.035 Sestavni deli za letalsko in Components fo
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