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| Lock nuts
are very useful and are used by engineers and mechanics. The diagram below
shows a wheel pushed onto a threaded shaft. Washers are placed on either
side of the wheel and a lock nut is finally threaded in position. This is
a highly effective method of securing a wheels on shafts / axles. A close look at the lock nut shows that it has a nylon sleeve. As the nut is tightened, the thread on the shaft / axle cuts into the nylon, holding it firmly in position. As the wheel rotates a normal nut will loosen because of friction and vibration of the wheel. However, the nylon holds the nut firmly in position. |
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An alternative is to use two normal nuts. The second locks the first in position. |
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