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.

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

Product ID: 460526465

Details

Brand
Greartisan
Horsepower
300 Watts
Model name
gear
Speed
300 RPM
Voltage
12 Volts

🔄Positive-negative rotation with speed control

🔋Pure copper wire core boosts power +30%

⚙️All-metal gears for max durability

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€ 39.44

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Sold byAmazon BelgiumDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Gear up your projects with power, precision, and durability!

UNMATCHED DURABILITY - All-metal gears engineered for high abrasion and heat resistance, ensuring your motor outlasts the competition.
POWER SURGE EFFICIENCY - Precision-wound pure copper rotor increases power output by 30%, delivering robust torque at every turn.
HEAVY DUTY OUTPUT SHAFT - D-shaped hardened steel shaft offers superior toughness and impact resistance for extended motor life.
PLUG AND PLAY RELIABILITY - Backed by a 100% unconditional return guarantee, with customizable voltage and RPM options to fit your exact needs.
VERSATILE ROTATION CONTROL - Easily switch between forward and reverse rotation with fine speed reduction for precise applications.

The Greartisan DC 12V 300RPM Gear Motor features a rugged all-metal gearbox with high-temperature and abrasion resistance, a pure copper wire core rotor that boosts power by 30%, and a hardened D-shaped output shaft for enhanced durability. Designed for low noise and high torque, it supports positive-negative rotation with speed reduction, making it ideal for vending machines, cameras, and automated devices. Backed by a reliable guarantee and customizable options, this motor is engineered to deliver consistent performance in demanding professional applications.

Specifications

ASIN	B072N84V8S
Best Sellers Rank	8,245 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 2 in Gearboxes, Gearheads & Speed Reducers
Brand	Greartisan
Country Of Origin	China
Customer Reviews	4.4 4.4 out of 5 stars (104)
Horsepower	300 Watts
Manufacturer	Greartisan
Material	Metal
Model Name	gear
Model Number	Greartisan
Speed	300 RPM
UPC	766330627002
Unit Count	1.0 Count
Voltage	12 Volts

Reviews

S**.

Great little motor. Make sure you don't use screws too long because threaded holes are not closed and you might damage the gear. Seems to have suffisent torque even at low RPM.

11.12.2023

V**N

Sehr gutes hohes Drehmoment aus der Welle

8.03.2025

S**I

it met my expectations for my experimentation

11.01.2025

A**R

One motor was quiet, the other noisey.

25.04.2021

M**Y

Depends on what you are using it for. But it didn't have enough torque for what I was going to use it for so I send it back. And still looking for one that has enough torque that I can't stop it with my fingers at a decent price. Have a great day-mbs

17.03.2026

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