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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DC 12V 100RPM Gear Motor High Torque Electric Micro Speed Reduction Geared Motor Eccentric Output Shaft 37mm Diameter Gearbox

DC 12V 100RPM Gear Motor High Torque Electric Micro Speed Reduction Geared Motor Eccentric Output Shaft 37mm Diameter Gearbox

Product ID: 462725468

Details

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

🔋30% power boost with pure copper rotor

🔩D-shaped hardened steel output shaft

⚙️All-metal gears for max durability

MOP$345

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Description

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

VERSATILE ROTATION - Supports positive and negative rotation with adjustable speed—perfect for dynamic, custom applications.
UNMATCHED DURABILITY - All-metal gears engineered for high-temp & abrasion resistance, built to last through your toughest projects.
CONFIDENCE GUARANTEED - Backed by 100% unconditional return policy—because your peace of mind matters as much as performance.
POWER SURGE EFFICIENCY - Precision-wound pure copper rotor delivers a 30% instant power increase—because your motor deserves the best.
PRECISION TORQUE CONTROL - Low noise, high torque output (up to 3.6 Kg.cm) with smooth speed reduction for flawless performance every time.

The DC 12V 100RPM Gear Motor by Greartisan features a robust all-metal gearbox with high abrasion and temperature resistance, a pure copper wire core rotor boosting power by 30%, and a hardened D-shaped steel output shaft for enhanced durability. Rated at 3.6 Kg.cm torque and 0.92 Amp current, it offers low noise, reversible rotation, and precise speed reduction, making it ideal for vending machines, robotics, and automated devices. Compact and reliable, it’s engineered for professionals demanding performance and longevity.

Specifications

ASIN	B0721T1PXQ
Best Sellers Rank	33,118 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 28 in Hydraulic Motors
Brand	Greartisan
Country Of Origin	China
Customer Reviews	4.6 out of 5 stars 118 Reviews
Horsepower	100 Watts
Item Dimensions W x H	31W x 37H millimetres
Item Weight	7.8 Ounces
Manufacturer	Greartisan
Manufacturer Part Number	Greartisan
Material	Alloy Steel
Model Name	gear
Model Number	Greartisan
Model name	gear
Product dimensions	31W x 37H millimetres
Shaft Diameter	6 Millimetres
Speed	100 RPM
UPC	766330626975
Unit Count	1.0 count
Voltage	12 Volts

Reviews

M**B

Works perfectly

I used it on my lifesize R2D2 to rotate the dome. Works perfectly, wired it up no problem.

13.11.2024

A**R

Returned

Cannot really comment on product as I returned it after studying spec and reading reviews much more carefully. I wanted a small but high torque geared motor. Although it quotes a rated torque of 4Kgm.cm some reviews implied this was not possible. Also other products in the range with differing gear ratios gave ratings that were totally different compared to their gear ratio. This made me unsure so I returned item. I subsequently found a similar (but clearly different manufacturer) motor on a 'robot maker site'. This quoted stall torque and amps along with running torque and amps etc etc. I purchased that one with more confidence (and found motor exceed the torque quoted - did not stall even at over 12Kgm.cm).

3.03.2023

N**O

A 100 rpm motor to control a robot

No details about arrival, but worked out a gearing, very nice too.

22.09.2022

F**N

Alles einwandfrei

Alles in Ordnung

6.09.2026

P**A

Solid motor

This is good motor with metal gears but needs bit of extra grease on gears.

30.06.2023

L**O

Poca potenza

Pensavo avesse più forza

16.06.2025

J**.

Excellent quality

Excellent. Worked well in our project. Quiet and powerful.

15.03.2026

D**L

good value

needed a faster rpm and this motor was the answer. The attaching screw pattern was a perfect match to a motor I bought years ago, nice a quiet also.

2.02.2025

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MOP$345

Duties & taxes included

In stock

Sold byAmazon MacauDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Macau.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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The product quality is outstanding. Exactly what I needed for my work.

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Good experience, but the tracking updates could be better.

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