SIST EN 3047:2001

Aerospace series - Bearings, airframe rolling - Rigid single row ball bearings in corrosion resisting steel - Diameter series 0 and 2 - Reduced clearance category - Dimensions and loads

This standard specifies the characteristics of rigid single row ball bearings in corrosion resisting steel of diameter series 0 and 2 designed to withstand only slow rotations and oscillations under load. They are intended for use between fixed and moving parts of the aircraft structure and their control mechanisms, in particular the mounting of more than one bearing on the same shaft axis, which may require reduced clearances and runouts (axial and radial).

Luft- und Raumfahrt - Flugwerklager - Einreihige Rillenkugellager aus korrosionsbeständigem Stahl - Durchmesserreihen 0 und 2 - Reduzierte Lagerluft - Maße und Belastungen

Diese Norm legt die Eigenschaften von einreihigen Rillenkugellagern aus korrosionsbeständigem Stahl der Durchmesserreihen 0 und 2 fest, die so ausgelegt sind, dass sie unter Belastung nur langsamen Dreh- und Schwenk- bewegungen standhalten. Sie sind zur Verwendung zwischen starren und beweglichen Flugwerkteilen und deren Steuerungseinrichtungen vorgesehen, insbesondere bei Montage von mehr als einem Wälzlager auf der gleichen Wellenachse, die reduzierte Spiele (axiale und radiale Lagerluft, Plan- und Rundlauf) erfordern kann.

Série aérospatiale - Roulements pour structures d'aéronefs -Roulements en acier résistant a la corrosion, rigides, a une rangée de billes - Séries de diametres 0 et 2 - Catégorie a jeux réduits - Dimensions et charges

La présente norme spécifie les caractéristiques des roulements en acier résistant à la corrosion, rigides, à une rangée de billes, séries de diamètres 0 et 2 conçus pour supporter en charge uniquement des rotations lentes et des oscillations faibles.  Ils sont destinés à être utilisés entre les éléments fixes et mobiles de la structure des aéronefs et de leurs mécanismes de commande, et plus particulièrement dans le cas de montage sur une même ligne d'arbre, ce qui impose des jeux et battements réduits (axial et radial).

Aerospace series - Bearings, airframe rolling - Rigid single row ball bearings in corrosion resisting steel - Diameter series 0 and 2 - Reduced clearance category - 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 3047:1993 - Aerospace series - Bearings, airframe rolling - Rigid single row ball bearings in corrosion resisting steel - Diameter series 0 and 2 - Reduced clearance category - Dimensions and loads

Overview

EN 3047:1993 (Aerospace series) is a CEN standard that defines the characteristics, dimensions and loads for rigid single row ball bearings made from corrosion resisting steel in diameter series 0 and 2, in the reduced clearance category. The standard applies to bearings designed for slow rotations and oscillations under load and intended for use between fixed and moving parts of aircraft structures and control mechanisms. It also addresses situations where multiple bearings are mounted on the same shaft axis, requiring reduced clearances and controlled runouts.

Key topics and requirements

• Scope and applicability: Bearings for airframe use subject to slow rotation/oscillation; diameter series 0 and 2 only.
• Material: Corrosion resisting steel specified as the bearing material to suit aerospace environmental and longevity requirements.
• Reduced clearance category: Requirements for bearings with reduced internal radial clearance to support accurate positioning and multiple-bearing assemblies on the same shaft.
• Dimensional specifications: Geometrical dimensions, tolerances, and interface features for compatibility in aircraft structures (as specified in the standard).
• Load capacity and ratings: Defined static and dynamic load considerations appropriate for slow rotational or oscillatory service conditions.
• Runout control: Axial and radial runout limits and measurement considerations where multiple bearings are aligned on a shaft.
• Quality and marking: Identification, traceability and conformity markers to meet aerospace procurement and inspection needs (as applicable to the standard).

Practical applications

• Designers and engineers specifying airframe bearings for control linkages, hinges, actuators, and structural joints where precision, corrosion resistance and low-speed operation are required.
• Bearing manufacturers using EN 3047 to produce rigid single row ball bearings that meet aerospace dimension and load requirements for diameter series 0 and 2.
• Maintenance, procurement and quality assurance teams verifying replacement parts and ensuring compatibility when multiple bearings are mounted on the same shaft.
• Certification and airworthiness specialists referencing the standard during component qualification and supplier audits.

Related standards

• Other aerospace bearing standards and industry specifications (EN aerospace series, ISO and national aerospace standards such as NAS) that cover different bearing types, diameter series, materials, clearances or higher-speed applications. Users should cross-reference applicable ISO/EN aerospace bearing documents and manufacturer specifications.

Keywords: EN 3047, airframe bearings, rigid single row ball bearings, corrosion resisting steel, reduced clearance, diameter series 0 and 2, aerospace bearings, dimensions and loads.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Bearings, airframe rolling - Rigid single row ball bearings in corrosion resisting steel - Diameter series 0 and 2 - Reduced clearance category - Dimensions and loadsLuft- und Raumfahrt - Flugwerklager - Einreihige Rillenkugellager aus korrosionsbeständigem Stahl - Durchmesserreihen 0 und 2 - Reduzierte Lagerluft - Maße und BelastungenSérie aérospatiale - Roulements pour structures d'aéronefs -Roulements en acier résistant a la corrosion, rigides, a une rangée de billes - Séries
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