--- On Fri, 4/5/13, Viesturs Lācis <viesturs.la...@gmail.com> wrote:
> From: Viesturs Lācis <viesturs.la...@gmail.com> > Subject: Re: [Emc-users] OT-buttress threads > To: "dave" <dengv...@charter.net>, "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > Date: Friday, April 5, 2013, 2:34 PM > 2013/4/5 dave <dengv...@charter.net> > > > Hi all, > > > > The wiki for buttress threads states the buttress > threads tend to fail > > because only the first 4 threads are load bearing. > > > > Not really true, all threads are bearing the load, it is > just that due to > elasticity of material first one has the most, last one has > the least load. > I have formulas to calculate, what percentage of the load > does each thread > take somewhere in my notes from last year. Basically the > rule of thumb is > that first three threads take approximately 75% of the load > and it does not > make much sense to have more than 8-10 threads. That must be what the Ford engineers thought when they made all those overhead cam V8 engines with only 4 threads in the spark plug holes. Theory met reality and failed. The threads fail and the spark plugs blow out. ------------------------------------------------------------------------------ Minimize network downtime and maximize team effectiveness. Reduce network management and security costs.Learn how to hire the most talented Cisco Certified professionals. Visit the Employer Resources Portal http://www.cisco.com/web/learning/employer_resources/index.html _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
