EN 3281:1994
(Main)Aerospace series - Bearings, airframe rolling - Rigid single row ball bearings in steel - Diameter series 8 and 9 - Dimensions and loads
Aerospace series - Bearings, airframe rolling - Rigid single row ball bearings in steel - Diameter series 8 and 9 - Dimensions and loads
This standard specifies the characteristics of rigid single row ball bearings in steel of diameter series 8 and 9 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. The airframe rolling bearings defined in this standard are used from -54°C to 150°C.
Luft- und Raumfahrt - Flugwerklager - Einreihige Rillenkugellager aus Stahl - Durchmesserreihen 8 und 9 - Maße und Belastungen
Diese Norm legt die Eigenschaften von einreihigen Rillenkugellagern aus Stahl der Durchmesserreihen 8 und 9 fest, die so ausgelegt sind, dass sie unter Belastung nur langsamen Dreh- und Schwenkbewegungen standhalten. Sie sind zur Verwendung zwischen starren und beweglichen Flugwerkteilen und deren Steuerungseinrichtungen vorgesehen. Die in der vorliegenden Norm festgelegten Flugwerklager sind in dem Temperatur- bereich von -54°C bis +150°C anwendbar.
Série aérospatiale - Roulements pour structures d'aéronefs - Roulements en acier, rigides, à une rangée de billes - Série de diamètres 8 et 9 - Dimensions et charges
La présente norme spécifie les caractéristiques des roulements en acier, rigides, à une rangée de billes, séries de diamètres 8 et 9 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. Les roulements de structure définis par la présente norme sont utilisables dans l'intervalle de température de -54°C à +150°C.
Aerospace series - Bearings, airframe rolling - Rigid single row ball bearings in steel - Diameter series 8 and 9 - Dimensions and loads
General Information
- Status
- Published
- Publication Date
- 09-Jun-1994
- Withdrawal Date
- 30-Dec-1994
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 3 - Mechanical
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 21-Jan-2025
- Completion Date
- 14-May-2025
Overview
EN 3281:1994 is a European standard developed by CEN that defines the specifications for rigid single row ball bearings in steel, specifically for diameter series 8 and 9. These bearings are designed primarily for aerospace applications, particularly for use in airframe rolling components. The standard covers the dimensions, load ratings, and characteristics of bearings intended to operate under slow rotational speeds and oscillatory motion. EN 3281:1994 ensures reliability and consistency for bearings used in critical aircraft structures and control mechanisms within temperature ranges from -54°C to 150°C.
Key Topics
- Bearing Type: Rigid single row ball bearings made from steel
- Diameter Series: Focus on size series 8 and 9, which relate to specific diameter ranges and dimensional profiles
- Operational Conditions: Bearings designed for slow rotations and oscillations with loads relevant to airframe movements
- Temperature Range: Suitable for aerospace environments operating between -54°C and 150°C
- Load Capacities: Defined static and dynamic load limits to guarantee performance under typical aircraft service conditions
- Dimensional Accuracy: Precise dimensions standardization critical for compatibility and interchangeability in aerospace assemblies
- Application in Aircraft Structures: Used between fixed and moving parts inside airframe structures and control systems to ensure smooth, reliable motion
Applications
The EN 3281:1994 bearings are essential components in aerospace engineering, contributing to the safety and efficiency of various aircraft systems:
- Airframe Rolling Elements: Bearings in landing gear, door mechanisms, and movable airframe sections where controlled rolling motion is required
- Control Mechanism Joints: Assuring smooth movement of flight control surfaces and linkages under varying load and temperature conditions
- Oscillating Load Applications: Ideal for parts subject to repeated back-and-forth motions rather than continuous high-speed rotation
- Temperature Sensitive Environments: Designed to maintain integrity and performance in extreme temperature ranges encountered during flight operations
- Maintenance and Replacement: Providing standardized bearings that facilitate maintenance, repair, and replacement with consistent quality
Related Standards
- EN 12922: Aerospace series - Ball and roller bearings - General technical delivery conditions and acceptance tests
- EN 12749: Aerospace series - Rolling bearings - Radial spherical plain bearings - Dimensioning and designations
- ISO 15243: Rolling bearings - Damage and failure modes - Terms, definitions and taxonomy
- AS 81820: Aerospace standard covering rolling bearings for aircraft control systems
- MIL-PRF-81820: U.S. military specification for aerospace rolling bearings
These related standards complement EN 3281:1994 by covering broader aerospace bearing requirements, testing protocols, and classification systems, ensuring comprehensive guidance for aerospace bearing selection, design, and maintenance.
Keywords: EN 3281, aerospace bearings, rigid single row ball bearings, diameter series 8, diameter series 9, airframe rolling bearings, aerospace standard, bearing dimensions, bearing loads, aircraft bearings, temperature range aerospace, slow rotating bearings
Frequently Asked Questions
EN 3281:1994 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Bearings, airframe rolling - Rigid single row ball bearings in steel - Diameter series 8 and 9 - Dimensions and loads". This standard covers: This standard specifies the characteristics of rigid single row ball bearings in steel of diameter series 8 and 9 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. The airframe rolling bearings defined in this standard are used from -54°C to 150°C.
This standard specifies the characteristics of rigid single row ball bearings in steel of diameter series 8 and 9 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. The airframe rolling bearings defined in this standard are used from -54°C to 150°C.
EN 3281:1994 is classified under the following ICS (International Classification for Standards) categories: 49.035 - Components for aerospace construction. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 3281:1994 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
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 steel - Diameter series 8 and 9 - Dimensions and loadsLuft- und Raumfahrt - Flugwerklager - Einreihige Rillenkugellager aus Stahl - Durchmesserreihen 8 und 9 - Maße und BelastungenSérie aérospatiale - Roulements pour structures d'aéronefs - Roulements en acier, rigides, a une rangée de billes - Série de diametres 8 et 9 -
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