Calculations to Determine Dimensions for Backup Rings to AS5781, AS5782, AS5860, AS5861

Standard:
Issued:
  • 2011-05-25
 
  • HISTORICAL Access the latest revision: AIR6082A
Publisher:
  • SAE International
Pages:
38
Scope:

This AIR documents the methodologies used to calculate the dimensions and tolerances used in the following backup rings standards: • AS5781 • AS5782 • AS5860 • AS5861 In addition, an appendix is provided which provides details of gland and backup ring design practices.

Rationale:

Previous parts standards that were originally developed for backup rings used dimensions that were based only on the fit to hardware and O-ring dimensions at ambient. However, backup rings to AS5781, AS5782, AS5860, AS5861 were designed to suit practical operating conditions and machining capabilities of the material. Thus, there is a requirement for a document that provides the means to determine the dimensions for these backup rings. This document has been compiled to meet this need.

History:
Standard Published Revision Status
AIR6082A 2016-06-09 Latest Stabilized
2011-05-25 Historical Issued
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