Here are two demonstrations in one. The
bottom half shows a pair of gears moving power from the motor to the
crank at the top.
Gears, like the timing pulley and the
sprocket have a tooth
pitch and a bore diameter, but they also have other named
classifications which describe specifics about the shape of the teeth.
This particular type of gear could be called a plastic spur gear,
meaning a spur gear made of plastic. It is only fair to say here that
specifying gears for a new design can be rather involved because of the
number of parameters required to describe a gear. Plastic spur gears
are
a good place to start learning about this very essential power
transmission component.
The top gear is also the rotating part of a crank mechanism.
Cranks are one way to convert linear reciprocating (back and forth)
motion to rotary motion and vice versa.
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Gears are available from SDP-SI and Small
Parts, Inc. See the sources
page .
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