makes this interesting little DC gearmotor
-- model number HG16-060-AA-02, HG16 is
the series name, 060 is the gear ratio
(1/60), and AA denotes the motor's voltage
rating (6V DC). It draws a fair amount of
current at higher voltages, but by the
time angular rate is taken into account,
is a very efficient little motor
(particularly at low voltages).
The Copal web site has
a data sheet on the motor here.
10 lines / cm