The NAS0331 standard does not exist in a vacuum. It is part of a larger ecosystem of standards, each with a specific purpose.
Key Benefit : Drastically minimizes axial pressure during installation, lowering the risk of micro-cracking the housing or distorting internal bearing tolerances. Method 300: Ball Impression Staking
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Visual evaluation for galling, micro-cracks, and material smearing Testing and Quality Assurance
The NAS0331 specification defines critical procedures for the installation and retention of aerospace bearings, focusing on swaging and staking to ensure structural integrity. It covers rigorous standards for housing deformation, material specifications, and torque measurements to prevent bearing failure. Detailed technical discussions are available via NAS0331 Bearing Specification Details | PDF - Scribd
: Aircraft skin-to-frame attachments, structural repairs, and assemblies where access is limited to only one side (hence "blind"). How to Access the PDF
The NAS0331 standard (often referenced in relation to MS14103J specifications) ensures that the assembly meets specific, high-precision demands: Requirement Bearing Installation and Retention Techniques Swaging and Staking Industry Aerospace & Defense (AIA/NAS) Material focus Metal housing, plain bearings
* Revision: ... * Published: 07/31/2020. * Number of Pages: ... * File Size: 1 file , 360 KB. Accuris Standards Store NAS0331 Bearing Specification Details | PDF - Scribd
The National Aerospace Standard (historically renumbered from NAS-331) is titled “Bearing Installation and Retention by Swaging or Staking” . It applies specifically to bearings containing a grooved outer race (V-groove) and governs how that outer race is mechanically deformed into a structural housing material.