Greartisan DC 12V 10RPM 40Kg.cm 8mm Single Shaft Self-Locking Reversible Worm Gear Motor with Cable, High Torque Speed Reduction Motor, Turbine Electric Gearbox Motor

I got the 10rpm one they have a lot of power well made. Mine were only tapped on shaft side. I just tapped out other side myself with 4mm tap.

This motor has more torque than I thought a little motor like this could have. I had to drill and tap a hole through the post and my sleeve because just using the flat for a connection between the motor and my valve didn't work when it hit the end of travel. The motor just kept rotating and spun it right on through. Yes, my valve and sleeve were steel...

works just as expected. great unit and I am glad I bought this one.

I built an electric chute blocker with this gear motor and only opened and closed it about six times in the first half hour of use and the gear stripped. The chute has a 1/4 inch thick rubber on the inside so when the chute closes it does not bind and has some "give" to protect any normal gear motor from jamming. The chute is made of aluminum so it is light weight. I guess I will go with a regular electric window replacement motor.