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Forum: Reliability & Maintainability Questions and Answers

Topic: Reliability & Maintainability Questions and Answers

Topic Posted by: Reliability & Maintainability Forum (src_forum@alionscience.com )
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998

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Original Message:

Posted by: Bob Valerius (robert.valerius@ngc.com )
Organization:Northrop-Grumman Oceanic Systems
Date posted: Fri Dec 3 15:12:25 US/Eastern 2004
Subject: Relibility of Drive Belts
Message:
Hi. Does anyone know of a reliability model for drive belts? I realize they are listed in NPRD-95 but am hoping for a model that can predict life with stress parameters. Thanks!


Reply:

Subject: Drive Belt Reliability
Reply Posted by: BWD (bdudley@alionscience.com )
Organization: RAC
Date Posted: Tue Dec 7 14:40:05 US/Eastern 2004
Message:
Drive belt reliability models do not seem to be part of the standard prediction techniques. I checked the models in MIL-HDBK-217, the Mechanical Reliability Handbook (98/LE1), RDF-2000, and Telcordia. None of these have a model for drive belts. In NPRD-95 (Non-electronic Part Reliability Data), I found a single data point for drive belts. The failure rate for a drive belt in a ground benign environment is 3.73 failures per million hours. This data point could be used in other environments if you use the translation estimation factors in the Reliability Toolkit; Commercial Practices Edition to convert it.


Reply:

Subject: drive belt reliability
Reply Posted by: Larry George (pstlarry@yahoo.com )
Organization: Problem Solving Tools
Date Posted: Sat Dec 11 17:11:50 US/Eastern 2004
Message:
Please accept my apologies for this slightly commercial message, but this reference is relevant, and there may not be free alternatives that include stress. You will find other people who have worked on belt reliability with a Google search. See ($12.50 or $9.60 to SAE members) SAE document 972587 by Ron Salzman (Ford) and Scott Ciemniecki (Gates) for a simulation and prediction methodology for MTBF and perhaps age-specific reliability. I don't have the article, but I recall that it was a rather elaborate prediction model that may have included stress. (Ron S. and I worked at LLNL a long time ago.) If you are interested in the age-specific field reliability (not predictions) of Gates belts, contact me.


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