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The torque of a DC motor is usually maximum at zero rpm and stays fairly flat over the rated rpm range, but I agree a reduction of some kind may be an advantage, depending on the present torque required.I think it depends on the torque you require.
50 rpm is awfully slow, might be better to use gear reduction.
ok, I want to use this motor, it is possible to slow down to 50 RPM?
http://it.rs-online.com/web/p/motori-cc/2483671/
Pushing button will energize coil.
Once coil energizes, relay contact closes and shorts across push button contacts.
This lets button to be briefly pushed and relay coil has continuous power.
Once you understand, we will move on.
http://it.rs-online.com/web/p/motoriduttori-cc/4095232/Highly unlikely, and certainly not if you want it to drive any sort of load.
Have you considered a gear motor?
What are you actually trying to do? If we can be told what your intended purpose is (rather than what your proposed solution is) we may be able to suggest something which will work.
235 RPM to your original 50 RPM is very REVELANT. Nearly 5 times as fast!!I think it is so low that it is not relevant
I understood this but if I press the button opens the negative part of the circuit and the coil never get energized