----------
> From:
> To: triumph digest <triumphs@autox.team.net>
> Subject: Re: Lockwashers
> Date: Thursday, February 19, 1998 7:58 PM
>
> Jack, I agree provided bolt stretch is a measure of sufficient torque on
> highly stressed fasteners. Low stress fasteners must have clean bearing
> area under their heads with threads chased clean and lightly oiled.
Always
> use the correct grade of fastener and in critical components use new ones
> on each reassembly.
> Larry(Spitman)
>
> ----------
> > From: Jack W Drews <vinttr4@forbin.com>
> > To: triumph digest <triumphs@autox.team.net>
> > Subject: Lockwashers
> > Date: Thursday, February 19, 1998 5:56 AM
> >
> > As far as the other lock tabs on these motors...<Personal Opinion Mode
> > ON>...throw the suckers away. There's no reason I can think of to use
an
> > 80
> > ton cold rolled heat treated rod bolt, and then stick a soft tin lock
> > tab
> > with a Rockwell hardness of about 1 under it. <POM OFF>
> >
> > Jeez, I love opinions...just like you-know-what's...everybodies got
> > one...
> > Nick in Nor Cal
> >
> > I haven't started a controversial thread in awhile, so here goes one
> > regarding lockwashers, locking tabs, loctite, torque, etc.
> >
> > I just retired from life-long employment in one of the world's leading
> > construction and agricultural equipment manufacturers. They use LOTS of
> > bolts -- billions of them.
> >
> > Extensive research revealed a number of years ago that when designing a
> > bolted joint that is metal to metal, the one single thing that insured
> > bolt retention was proper torque. Furthermore, they found that locking
> > tabs and lockwashers do ALMOST NOTHING in terms of retention of the
> > bolt. Subsequently, as each product was redesigned, all retaing
hardware
> > was eliminated, as was spotfacing under the heads of bolts. Instead, we
> > specified very flat surfaces in the as-cast condition. Thiese changes
> > resulted in huge savings and NO increase in failures.
> >
> > We DO make extensive use of Loctite compounds, however.
> >
> > Because of this, I have eliminated things from my racecar like the
sheet
> > metal locking tabs on rod bolts, the lock tabs on flywheels and ring
> > gears, etc. I have never had a bolt loosen because of this.
> >
> > Let the flames begin.
> > --
> > uncle jack the carfrek
> > TR4 Rallye Replica vintage racer
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