How much weight can this motor lift if it was used for a "mini" garage door opener? Door would be 50"x30". Approximately 30lbs

The maximum torque this motor could produce is approximately 0.67 lb-in peak at close to stall. The stated speed 120 RPM is assumed to be a no-load value. Using a more reasonable operating 60% of these values, the motor may approximately produce 0.4 lb-in at 90 RPM. The power available from this unit is approximately .426 watts. You want to lift a 30 lb door 30 (?) inches in an assumed 10 seconds which is approximately 10 watts. So what you are asking is will a 0.43 watt motor power a 10 watt requirement. The answer is no. (The preceding power requirement calculation does not address any added wattage requirement due to friction or drive efficiency losses which would increase the "no" to a "HELL NO")

Can I use a 12V 1A adapter with this motor?

Depends on your application. I got 20 RPM motor: no load at 12V ~100mA. No load start-up 2A. I think stall test was nearly 4A.

Do these leak grease from the gear box?

Nope no sign of any grease leaking out yet

If this motor is used as a wind turbine generator, will it output 12v at 200rpm?

I used mine as a hand crank phone charger that charged a battery pack. I worked great and the output will vary based on your load and speed, so it will probably have a lower voltage than 12v at 200RPM. You'll want to put it through a full bridge rectifier with a capacitor in parallel to produce a DC voltage, however the diodes and capacitor will also drop your voltage. The battery pack I was using was only around 6 to 7 volts DC, also the gearing in the motor is really high so for a wind turbine you would probably have to help start the blades to get them to spin.

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🔧 Gear Up for Greatness!

VERSATILE OUTPUT - D-shaped output shaft made from high hardness steel for improved toughness.
RISK FREE ASSURANCE - 100% unconditional return service for peace of mind.
UNMATCHED DURABILITY - Crafted with all-metal gears for high-temperature and abrasion resistance.
ADJUSTABLE PERFORMANCE - Enjoy low noise operation with adjustable speed, driving up to 15 kg at 10 RPM.
POWER BOOSTING TECHNOLOGY - Pure copper wire core rotor enhances power by 30% with precision winding.

The GreartisanDC 12V 300RPM Gear Motor is a high-torque electric micro speed reduction motor designed for durability and performance. With all-metal gears and a pure copper wire core rotor, it offers enhanced power and reliability, making it ideal for various applications. The D-shaped output shaft ensures longevity, while the adjustable speed feature allows for versatile use. Plus, it comes with a risk-free guarantee for your confidence.

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Brand	Greartisan
Model Name	gear
Speed	300 RPM
Voltage	12 Volts
Horsepower	300 Watts
Material	Metal
Item Weight	7.6 Ounces
Manufacturer	Greartisan
Part Number	Greartisan
Item Weight	7.6 ounces
Package Dimensions	4.02 x 2.52 x 2.09 inches
Item model number	Greartisan
Is Discontinued By Manufacturer	No
Size	12 Volt
Color	300 RPM
Item Package Quantity	1
Batteries Included?	No
Batteries Required?	No

Greartisan DC 12V 300RPM Gear Motor High Torque Electric Micro Speed Reduction Geared Motor Eccentric Output Shaft 37mm Diameter Gearbox

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