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 HOW
THEY WORK
The molded Greer
nylon insert is the locking element in Greer locknuts. The intern al
diameter of the insert is a computer-determined degree smaller than
the bolt thread and the external diameter is large enough to fit
tightly under a rolled over, crimped metal collar.
The resiliency
of Greer's nylon collar prevents the threads of the bolt from cutting
the collar. The bolt threads become impressed into the nylon forming
a tight grip and preventing the nut from rotating free, even under
severe shock and vibration.
Note that the
driving torque creates a degree of metal-to-metal thread engagement
along the upper flanks of the threads as the bolt is started into
the nut. No matter how severe the vibration, the nylon collar exerts
constant pressure against the threads on the bolt...not only where
the bolt is engaged with the nylon, but along the entire metal-to-metal
thread engagement. As the bolt enters the nylon, a downward pressure
is created. The pressure forces the nut axially downward until the
thread flanks of the nut and bolt are in close frictional contact.
Thus locking occurs along the entire length of the threads.
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