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Re: Thread Direction

To: mgt <mg-t@autox.team.net>, mgs <mgs@autox.team.net>
Subject: Re: Thread Direction
From: Bullwinkle <yd3@nvc.net>
Date: Sun, 24 Sep 2000 13:53:15 -0700
Ben Asked:

<<<snip>>>
> 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).
<<<snip>>>

and Ray said:

<<<snip>>>
> Actually, heavy braking would tend to loosen knock-offs wouldn't it?
<<<snip>>>

Right!!  I don't think the centripetal force acting on the spinner is great
enough to cause it to loosen.

However, think about all those race cars clipping hay bales, and the sides of
each other.  You now have something of substance grabbing hold of the ears of
the spinner.  If the nuts had threads of the opposite direction, such kisses
would loosen the nut.

IMO that would be more likely to loosen the nut than braking or acceleration. 
TD's have hub caps, the nut is inside the plane of the wheel rim, and the stub
axle sticks out beyond the nut.  So perhaps here they went with the centripetal
theory. That's just a thought.

Blake



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