If it helps - I've seen these motors before (I have a couple with RC car
wheels bolted on) They are from Rowe snack Vending machines the type
with the steel Spiral pusher on. If you can find someone who repairs
them you can probably pick some motors up cheap.
They are very powerful at 12 Volt (pretty good at lower voltages too)
and you can easily put a bolt through the centre of the output shaft to
hold a wheel or sprocket on.
You can also get them without the reverse lock for those coin-op
cranes with all the stuffed animals(Plush) in them. They are not very
fast but they have a good amount of power to them. Any company that
sells parts for coin operated video games and vending machines. You
can also ask your nearest bowling alley/arcade when the tech comes by
and show up then and ask him/her. I did that kind of work for 3 years
as a side job and you can find all kinds of neat and useful parts. Mac
valves, air cylinders, motors and such from dead sitdown video games.
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