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Straight
Sided Splines
Straight
Sided Splines were said in 1959 to be "on the way out"
however they remain popular as an established standard for many
applications within the Machine Tool and Automotive industries.

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Involute
Splines
Involute
Splines are favoured over
Straight Sided Splines because of
their greater strength and the fact
that for any given pitch the tooling
can cut any number of teeth
resulting in a more cost effective
production method.
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