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Design and Development Requirements for Mechanisms

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SUNS Notification Type
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Organization that Developed the Standard
Organization that Developed the Standard
NASA Standard
Document Identifiers
Document Number
NASA-STD-5017
Version
B
Document Date
Is Active?
ACTIVE
NASA Organization and Technical Discipline
Responsible NASA Organization
NASA HQ, Office, Facility or Division
NASA HQ Office, Facility or Division
OCE - Office of the Chief Engineer
Technical Discipline Category
5000 - Structures/Mechanical Systems, Fluid Dynamics, Thermal, Propulsion, Aerodynamics
Endorsed Standard
Endorsement Details
Endorsing NASA Organization
OCE Endorsed Standard
NASA Core Standard
No
NASA Endorsement Date
NASA Endorsed Standard Status
NASA Endorsed Standard
Mandatory Standard
NASA Mandatory Standard
Not a NASA Mandatory Standard
Document Scope
Document Scope
This Standard establishes common NASA design, development, and test requirements for mechanisms whose operation is required for safety or mission success. It is applicable to space flight mechanisms that are designed, built, or acquired by or for NASA, though it may also serve as a useful guidance document for other systems such as ground support equipment (GSE). Valves, ordnance-actuated mechanical devices, quick-release pins (also known as push in and pull [PIP] pins), threaded interfaces designed to be actuated in service, and interfaces designed to release mechanical degrees of freedom are subject to failure modes typical of mechanisms and are therefore considered mechanisms subject to the requirements of this document. See Appendix A, section A.2.8, for more information on quick release pins. This Standard does not address human factors requirements. Adherence to this Standard does not in and of itself exempt a mechanism from any fault tolerance or hazard control requirements. The requirements and best practices in this Standard may serve as a useful basis for evaluating rationale for variances to fault tolerance requirements that may be proposed for mechanisms.
Keywords
Dry-Film lubricant debris, qualification testing, design life test factor, acceptance testing run-in testing environmental test, quick-release pins, spring failure, fastener preload, torque margin, force margin, mil-a-83577b, viscous damper fluid cleanliness, bearings, bearings as a current path, bearing quality, bearing hertzian contact stress, switches, switch actuation, fastener retention redundancy fastener rotation, locking feature, fastener torque, gear performance, bolt criteria, end-of-travel stops, electric motor actuation, separation nuts, lubricant migration, snap rings, cotter pins
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PUBLIC: Upload Publicly Available Standard
2022-12-06-NASA-STD-5017B-Approved.pdf (1.21 MB)
PUBLIC: Document History for Standard
nasa-std-5017.pdf (92.87 KB)
nasa-std-5017a.pdf (1.01 MB)
NASA-STD-5017A-Revalidated-w-Change-1-2.pdf (711.07 KB)
Important Standard Dates
Next 5-Year Review Date
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