McCulloch Chain Saws

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Those humps were intended to reduce vibration, several chain manufacturers tried similar designs. In actual use some folks began to notice there was less tendency for kick back and thus the evolution of "safety chain" was started.

McCulloch Pintail chain was intended to reduce vibration with that tail sticking out around the nose of the bar.

Pioneer Dura-Cut had a big rooster tail for the same purpose.

The Oregon 84 (.404 power sharp type chain) has a similar anti-vibration bumper.

Saber and others also had similar type designs.

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Mark
 
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