SIST EN 3057:2001

Aerospace series - Bearings, airframe rolling - Rigid double row ball bearings in steel, cadmium plated - Dimensions and loads

This standard specifies the characteristics of rigid double row ball bearings in steel, cadmium plated, designed to withstand only slow rotations and oscillations under load. They are intended for use in the hubs of bell crank levers fitted with a single bearing. The airframe rolling bearings defined in this standard are used form -54°C to +150°C.

Luft- und Raumfahrt - Flugwerklager - Zweireihige Rillenkugellager aus Stahl, verkadmet - Maße und Belastungen

Diese Norm legt die Eigenschaften von zweireihigen Rillenkugellagern aus Stahl, verkadmet, fest, die so ausgelegt sind, dass sie unter Belastung nur langsamen Dreh- und Schwenkbewegungen standhalten. Sie sind zur Verwendung in den Naben von Umlenkhebeln, die mit einem einzigen Wälzlager ausgerüstet sind, 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, cadmiés, rigides, a deux rangées de billes - Dimensions et charges

La présente norme spécifie les caractéristiques des roulements en acier, cadmiés, rigides, à deux rangées de billes conçus pour supporter en charge uniquement des rotations lentes et des oscillations faibles. Ils sont destinés à être utilisés dans des moyeux de guignot équipés d'un seul roulement. Les roulements de structure définis par la présent norme sont utilisables dans l'intervalle de température de -54°C à +150°C.

Aerospace series - Bearings, airframe rolling - Rigid double row ball bearings in steel, cadmium plated - 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 3057:1994 - Aerospace series - Bearings, airframe rolling - Rigid double row ball bearings in steel, cadmium plated - Dimensions and loads

Overview

EN 3057:1994 is a CEN aerospace standard that defines the dimensions and load characteristics for rigid double row ball bearings in steel, cadmium plated, intended specifically as airframe rolling bearings. These bearings are designed for slow rotations and oscillatory motion and are primarily specified for use in the hubs of bell crank levers fitted with a single bearing. The standard covers operational limits for use between −54 °C and +150 °C.

Key topics and requirements

• Bearing type and material: rigid double row ball bearings manufactured in steel with cadmium plating for corrosion resistance in certain aircraft environments.
• Intended operating mode: bearings are intended to withstand slow rotations and oscillations under load rather than continuous high-speed rotation.
• Dimensions and loads: the standard specifies the geometric dimensions and load-related characteristics needed to ensure interchangeability and predictable performance in airframe assemblies (the document title indicates these are core provisions).
• Environmental/temperature range: defined usable range from −54 °C to +150 °C, addressing extreme aerospace thermal conditions.
• Typical installation context: specified for bearings used in bell crank lever hubs with a single bearing arrangement, indicating typical mechanical mounting and load cases addressed by the standard.

Applications

• Use in airframe mechanical linkages and control system bell cranks where bearings experience oscillatory or limited rotational motion.
• Selection and procurement guidance for aerospace OEMs, subcontractors supplying bearing components, and maintenance organizations ensuring replacement parts meet airworthiness requirements.
• Reference for design engineers specifying bearings for load-bearing hinge points and lever hubs subject to low-speed motion and broad temperature extremes.
• Useful for quality assurance and certification teams verifying that bearing dimensions and load characteristics conform to recognized aerospace practice.

Who should use this standard

• Aircraft structural and mechanism designers
• Aerospace bearing manufacturers and suppliers
• MRO (maintenance, repair, overhaul) organizations and procurement specialists
• Certification bodies and quality engineers working with airframe rolling elements

Related standards

• Other aerospace bearing and airframe component standards (EN and ISO series) that cover bearing materials, corrosion protection, lubrication, or high-speed bearings. Consult the relevant EN/ISO catalogs for complementary or successor standards.

Keywords: EN 3057, aerospace bearings, rigid double row ball bearings, cadmium plated, airframe rolling bearings, bell crank lever hubs, dimensions and loads, temperature range.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Bearings, airframe rolling - Rigid double row ball bearings in steel, cadmium plated - Dimensions and loadsLuft- und Raumfahrt - Flugwerklager - Zweireihige Rillenkugellager aus Stahl, verkadmet - Maße und BelastungenSérie aérospatiale - Roulements pour structures d'aéronefs - Roulements en acier, cadmiés, rigides, a deux rangées de billes - Dimensions et ch
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