[Public-List] Tiller Head Key

[J Bergquist]

Yes, exactly. Also you will note that keys are often made out of a
soft material, like bronze. This is so that they will shear in an
overload situation.

J

On Sun, Oct 11, 2009 at 11:46 AM,  <crufone at comcast.net> wrote:
> The reason that shafts are made with keyways is so that if you hit
> something with enough force to shear the key, you shear the key
> instead of breaking the shaft.
>
> Go to a boat show and look at rudder stocks, and I challenge you to
> find one that is through-bolted. Nobody makes them this way and there
> is a reason for that. They always have keys and the reason is so that
> if you hit something you shear the key instead of breaking the shaft.
>
> John,
> So the key is part of the design as the weak link? Like an outboard propeller shear pin?
> Michael #133
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