[Mgs] Spring washers don't work !

Bill Saidel saidel at camden.rutgers.edu
Wed Jun 22 12:51:19 MDT 2011


Does that mean split washers were designed for static forces, not 
dynamic ones?  If there is no vibration in the plane of the torque 
vector, does a split washer add any resistance in the perpendicular 
direction?

Bill Saidel
BMCSNJ
'76B'
'74.5 CBB for sale'




On 6/22/2011 1:40 PM, Barney Gaylord wrote:
> That would be funny, if it wasn't so blatently stupid.  The "test" 
> fixture and the way it is set up and operates is designed to produce 
> special conditions that do not ever exist in your car.  In short, the 
> machine is designed and built specifically to unscrew the nut.
>
> Just as one example for consideration, would you expect the cylinder 
> head on your engine to orbit around on the head gasket when the engine 
> is running?  That is exactly what this machine does.  The plate 
> immediately below the nut has a large clearnce hole.  I don't see the 
> rest of the machine, other than to know it is fibrating with a lot of 
> input energy.  I don't know if the loose plate is being physically 
> driven in vibration and orbital motion, or if it does that by virtue 
> of the mass of the plate.  The method of motivation of the plate is 
> irrellevent.  The point is, the plate is orbiting in the direction 
> required to unscrew the nut.  This is similar to putting wire wheel 
> hubs on the wrong side of the car so the knock off nut will unscrew 
> itself as you drive rather than being self-tightening.
>
> A lockwasher on the cylinder head bolt may or may not prevent the nut 
> from unscrewing, but it certainly does not cause the nut to unscrew.  
> In the case of this special machine, the moving plate will generate 
> more unscrewing torque that the lockwasher can resist, same as being 
> able to unscrew the nut with a big enough wrench.  All you need to 
> defeat this machine is a left handed thread on the screw and nut to 
> make the nut self-tightening, just like wire wheel knock-off nuts.
>
> The demonstation in the video is a party trick designed to enable you 
> to suspend your common sense long enough to be fooled.
>
> Barney Gaylord
> 1958 MGA with an attitude
> http://MGAguru.com
>
>
> At 10:51 AM 6/22/2011 -0400, Barrie Robinson wrote:
>> ....
>> This is rather dynamite stuff especially to those who are hard into 
>> restoration.  Can we have some expert opinions?
>> ....
>>> http://www.boltscience.com/pages/helicalspringwashers.htm


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