Risks associated with improper bearing migration or retention failure.

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For official copies, you can access the standard through licensed distributors like Accuris Standards Store or the AIA/NAS site . Aerospace Bearing Tools - The Bearing Specialist

The aerospace standard governs the critical engineering practices of bearing installation and retention by swaging or staking . Published by the Aerospace Industries Association (AIA), this document provides strict procedural controls, tooling definitions, housing dimensions, and verification metrics. These guidelines ensure that spherical and plain bearings can withstand severe vibrational and structural loads in aviation applications.

The NAS0331 describes a . Here is a breakdown of its specific characteristics based on the standard title:

are optimized for on-wing applications, allowing for bearing retention, installation, and replacement in constrained spaces.

NAS0331 Revision 2 (Released July 31, 2020).

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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

Utilizes a stationary die configured with sharp segment edges. Pressed down using static hydraulic force, it forms specific linear impressions that displace housing material securely over the bearing chamfer. Technical Specifications Summary

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During the manufacturing of new aircraft, NAS0331 is a go-to standard used to guide the secure installation of bearings in critical systems like . The choice between staking and swaging methods within NAS0331 is often made based on production volume and quality requirements. For example, non-critical components in high-volume production may favor the speed and cost-effectiveness of staking, while high-precision parts requiring top-tier reliability will lean towards the superior quality of swaging.

Post-installation plating requirements, such as zinc-nickel or cadmium.

Complete Guide to AIA/NAS NAS0331: Bearing Installation and Retention by Swaging or Staking