Hi guys,
I can tell you this from first hand experience on the track: If the splines
are loose and/or the wheel in not TIGHT, braking can cause the knock-on to
come off......followed in short order by the wheel/tire.
If you install the left hub on the right-hand side, and vice-versa, the
knock-ons, wheels and tires will bid you a fond adieu while merely driving
down the street......!
Best,
Ray McCrary
"Speed is Life;
of course Luck and Altitude
are helpful, too."
----- Original Message -----
From: "Nigel Geach (CRFPULP)" <Ngeach@fccl.com>
To: "'Mark McCombs'" <loadcel4@infinet.com>
Cc: "'MG T series list'" <mg-t@autox.team.net>
Sent: Monday, September 25, 2000 1:01 PM
Subject: RE: Thread Direction
> Mark,
> You're driving proof that braking can loosen the knock-off, and I've had
> many philosophical discussions with mechanical types as to whether the
> convention is the best use of "handedness" of the threads! Maybe any
vintage
> racers in the group can shed further light? Perhaps we can conclude that
> effective brakes were less of an issue when this convention was
established.
> Cheers,
> Nigel
>
>
> > -----Original Message-----
> > From: Mark McCombs [SMTP:loadcel4@infinet.com]
> > Sent: Monday, September 25, 2000 10:40 AM
> > To: Nigel Geach (CRFPULP)
> > Subject: Re: Thread Direction
> >
> > I once had a TR-3 wheel fall right off the front left, by heavy braking
> > and
> > having the wheel spin over its worn splines, unspinning the spinner, (it
> > fell of first) , the wheel immediately thereafter. It was not pleasant.
I
> > always thought they "sided" the threads for this phenomena.
> > Mark
> > -----Original Message-----
> > From: Nigel Geach (CRFPULP) <Ngeach@fccl.com>
> > To: 'lbprince' <lbprince@email.msn.com>; mg-t@autox.team.net
> > <mg-t@autox.team.net>
> > Date: Monday, September 25, 2000 12:42 PM
> > Subject: RE: Thread Direction
> >
> >
> > >Ben,
> > >Part of the answer is in your nearest Engineering Dynamics text.
> > Visualize
> > >yourself in a moving frame of reference, ie travelling with your car at
a
> > >steady speed down an endless highway, and observing the right front
> > wheel.
> > >The wheel is turning clockwise, and the knock off is also turning
> > clockwise.
> > >In order to sustain its angular momentum in a clockwise direction, a
> > >continuous (albeit small) force must be exerted on the knock off by the
> > hub.
> > >If the knock off were a right hand thread, this rotational force relies
> > only
> > >on the friction of the thread, and if that friction slips, the knock
off
> > >would spin off. Hence the use of a leftt hand thread on the right side
.
> > >Repeat the visualization for the left side wheels, and we conclude a
> > right
> > >hand thread is required. Braking will tend to loosen knockoffs, but
> > >subsequent acceleration will tighten them again!
> > >However, the TD/TF thread question baffles me completely!
> > >Cheers,
> > >Nigel
> > >46 TC 0710
> > >73 Triumph Trident
> > >
> > >> -----Original Message-----
> > >> From: lbprince [SMTP:lbprince@email.msn.com]
> > >> Sent: Saturday, September 23, 2000 7:06 AM
> > >> To: mg-t@autox.team.net
> > >> Subject: Thread Direction
> > >>
> > >> As we all know, wire wheel knock-offs on the left side are right-hand
> > >> thread
> > >> and those on the right are left-hand. These orientations supposedly
> > keep
> > >> the knock-offs from loosening, particularly with heavy braking.
> > >>
> > >> Per the Workshop Manual, the axle nuts on the TD/TF are a different
> > story.
> > >> The left-front nut is left-hand thread, and the right-front nut is
> > >> right-hand thread (page K.6). Both sides on the rear are right-hand
> > >> thread
> > >> (page H.5).
> > >>
> > >> Aside from dismissing it as being "typically British", does anyone
know
> > >> the
> > >> reasoning for all this?
> > >>
> > >> Ben 54 TF 1500
> > >>
> > >>
> > >
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