Source 12v 24v dc planetary gear motor 50kg-cm 100kg-cm with 8mm shaft 10rpm 30rpm 60rpm and encoder on m.alibaba.com
25mm 12V 26RPM Brushless DC Gear Motor - RobotShop
Threaded Shaft 12V 24V DC High Speed Motor 3500 To 7000RPM 30W Adjustable Speed And Reversible Suitable For Cotton Candy Machine - AliExpress
QCTime DC 3V/6V/12V GA12-N20 Mini Micro Electronic Lock Metal Gear Motor with Gearwheel - Walmart.com
DC Moter, DC12V Adjustable Speed DC Motor 180W Permanent Magnet DC Motor 2000RPM with Bracket (DC 12V 2000RPM) - Amazon.com
24V 2000RPM 0.062Nm 13W 0.91A Round Ф42x43mm Brushless DC Motor - 42BLR43-24-01|STEPPERONLINE
BEMONOC Small DC Motor 12V High Speed 2000 RPM Micro DC Brush Motor - Amazon.com
100 V Three Phase 12V Dc Motor With Gearbox, For Industrial
Amazon.com: Reduction Motor, DC 12V 100RPM~2000RPM Gear Box Reduction Motor with Long Output Shaft 100RPM~2000RPM for RC Car Robot Model DIY Engine Toy(200RPM) : Toys & Games
DC 12V Geared Motor Micro Speed Reduction Gear Box with Long Output Shaft for Robot DIY 100/200/2000RPM(12V 200RPM) - Amazon.com
How to reduce the RPM of a 12v DC motor from 100 to 5 - Quora