: Used for specific geometric limitations where standard rolling tool paths are obstructed. Critical Tooling Specifications
The standard details two primary, distinct methods for bearing retention: swaging (defined as a method using rotary motion to form the bearing v-groove) and staking (defined as a method using a hydraulic press and stationary anvil dies to form the bearing v-groove). Understanding their differences is key to applying the standard correctly.
is the definitive global aerospace standard governing the installation, retention, and testing of spherical bearings used in critical structural housings. Formally titled "Bearing Installation and Retention by Swaging or Staking," this specification is managed by the Aerospace Industries Association (AIA). It provides strict guidelines that commercial and military aviation Maintenance, Repair, and Overhaul (MRO) facilities, as well as original equipment manufacturers (OEMs), must follow to ensure safety and structural integrity. Engineers and technicians frequently search for the NAS0331 PDF to access exact tolerances, mechanical methods, and proof-testing protocols. nas0331 pdf
Standards for no-load torque values and internal radial play measurements.
In case you are looking for a direct link or document I will let you know that I do not have the capability to provide you with a direct link or the document itself but I can guide you through the process. : Used for specific geometric limitations where standard
Details about the physical dimensions of the component, the type of package it's available in, and any relevant information for handling and assembly.
It defines the mandatory requirements and recommended practices for installing self-lubricating or plain bearings into metal housing components, such as airframe structures, control linkages, and landing gear assemblies. Key Components of the NAS0331 Document is the definitive global aerospace standard governing the
The standard categorizes different mechanical retention techniques into "Methods," with Method 100 and Method 200 being the most common in aerospace MRO (Maintenance, Repair, and Overhaul). 1. Bearing Staking (Method 100)
: Protruding head (often used where aerodynamics are less critical than structural integrity). Material Options Monel (Nickel-Copper Alloy) : High corrosion resistance. A-286 Stainless Steel : Excellent strength and heat resistance. Common Applications