- Out-of-Stock
Solarbotics GM13a 150:1 Mini Metal Gear Motor
The Solarbotics GM13a 150:1 mini metal gear motor is a compact (1.14" x 0.39" x 0.47") brushed DC motor with metal gears, very similar to the Sanyo NA3S motor. The major difference is that these Sanyo motor look-a-likes have brass front faceplates (not steel ones), and cost less.
These miniature brushed DC metal gear motors have 3 mm diameter output shafts that mate fairly well with any 1/8-inch hole output device, including the Solarbotics RW2 high-traction rubber wheels. Alternatively, you can use the Pololu universal mounting hub to mount custom wheels and mechanism to the micro metal gearmotor’s output shaft.
The brass faceplates have two mounting holes threaded for 1.7 (dia) x 0.35 (mm/thd) x 4mm long screws (M1.7 × 4 mm), or you can use our mounting bracket, which is specifically designed to securely mount the gearmotor while enclosing the exposed gears.
These small motors come in a variety of gear ratios, have a compact size (1.14" x 0.39" x 0.47"), and weigh only 0.29 oz, making them a great choice for small robot designs — and controlling these low-current motors is a snap with our qik 2s9v1 dual serial motor controller.
![]() |
| Solarbotics mini metal gearmotor dimensions (in mm). |
|---|
You can download a pdf version of this drawing with imperial dimensions (119k pdf) or metric dimensions (118k pdf).
| gear motor | gear ratio | free-run RPM | free-run current | stall current | stall torque | price |
| GM18 | 30:1 | 566 | 48 mA | 500 mA | 7.29 oz-in | $19.75 |
| GM12a | 100:1 | 170 | 48 mA | 390 mA | 10.70 oz-in | $19.75 |
| GM13a | 150:1 | 113 | 40 mA | 370 mA | 14.97 oz-in | $19.75 |
| GM14a | 298:1 | 71 | 50 mA | 533 mA | 30.70 oz-in | $19.75 |
| gearmotor | gear ratio | free-run RPM | free-run current | stall current | stall torque (oz-in / kg-cm) |
price |
| 5:1 Micro | 5:1 | 2450 | 50 mA | 360 mA | 1 / 0.1 | $15.95 |
| 10:1 Micro | 10:1 | 1250 | 40 mA | 360 mA | 2 / 0.2 | $15.95 |
| 30:1 Micro | 30:1 | 440 | 40 mA | 360 mA | 4 / 0.3 | $15.95 |
| 50:1 Micro | 50:1 | 250 | 40 mA | 360 mA | 6 / 0.4 | $15.95 |
| 100:1 Micro | 100:1 | 120 | 40 mA | 360 mA | 10 / 0.7 | $15.95 |
| 150:1 Micro | 150:1 | 85 | 40 mA | 360 mA | 15 / 1.1 | $15.95 |
| 210:1 Micro | 210:1 | 60 | 40 mA | 360 mA | 19 / 1.3 | $15.95 |
| 250:1 Micro | 250:1 | 50 | 30 mA | 360 mA | 22 / 1.6 | $15.95 |
| 298:1 Micro | 298:1 | 45 | 30 mA | 360 mA | 25 / 1.8 | $15.95 |
| 5:1 Micro HP | 5:1 | 6000 | 120 mA | 1600 mA | 2 / 0.1 | $15.95 |
| 10:1 Micro HP | 10:1 | 3000 | 120 mA | 1600 mA | 4 / 0.3 | $15.95 |
| 30:1 Micro HP | 30:1 | 1000 | 120 mA | 1600 mA | 8 / 0.6 | $15.95 |
| 50:1 Micro HP | 50:1 | 625 | 100 mA | 1600 mA | 15 / 1.0 | $15.95 |
| 100:1 Micro HP | 100:1 | 315 | 80 mA | 1600 mA | 25 / 1.8 | $15.95 |
| 150:1 Micro HP | 150:1 | 200 | 70 mA | 1600 mA | 45 / 3.2 | $15.95 |
| 210:1 Micro HP | 210:1 | 140 | 70 mA | 1600 mA | 65 / 4.7 | $15.95 |
| 250:1 Micro HP | 250:1 | 120 | 70 mA | 1600 mA | 75 / 5.4 | $15.95 |
| 298:1 Micro HP | 298:1 | 100 | 70 mA | 1600 mA | 90 / 6.5 | $15.95 |
| 24:1 Mini | 24:1 | 410 | 70 mA | 420 mA | 4 / 0.3 | $14.95 |
| 100:1 Mini | 100:1 | 140 | 90 mA | 800 mA | 15 / 1.0 | $17.95 |
| 35:1 Mini | 35:1 | 350 | 70 mA | 1500 mA | 35 / 2.5 | $17.95 |
| 25:1 20Dx44L mm | 25:1 | 500 | 160 mA | 3300 mA | 20 / 1.5 | $19.95 |
| 19:1 37Dx52L mm | 19:1 | 250 | 170 mA | 2500 mA | 40 / 2.9 | $24.95 |
Note: These gearmotors do not come with mounting hardware, instructions, or packaging. The brass faceplate has two mounting holes threaded for 1.7 (dia) x 0.35 (mm/thd) x 4mm long screws (M1.7 × 4 mm), and our micro metal gearmotor bracket (sold separately) gives you even more mounting options.
![]() |
Solarbotics GM14a 298:1 Mini Metal Gear Motor |
![]() |
Solarbotics GM12a 100:1 Mini Metal Gear Motor |
![]() |
Solarbotics RW2 Wheel (external set screw) |
Manufacturer BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Poland sprzedaz@kamami.pl 22 767 36 20
Responsible person BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Poland sprzedaz@kamami.pl 22 767 36 20
LCD 4x20, 98x60mm, LED backlight (WHITE), FSTN, enhanced temperature range, cyryllic, Pb-free, backlight current I=60mA (U=5V)
No product available!
Dagu Wild Thumper 4WD All-Terrain Chassis, Black, 34:1
No product available!
No product available!
No product available!
No product available!
No product available!
A module with a MEMS microphone and an amplifier that will allow you to detect a voice, a clap or a door slam. The board has an analog output. SparkFun BOB-18011
No product available!
No product available!
No product available!
No product available!
This synchronous switching step-down (or buck) regulator takes an input voltage of up to 38 V and efficiently reduces it to 5 V with an available output current of around 6 A.
No product available!
3D printer with automatic table levelling and print resume function. Equipped with a dual Z-axis and a filament sensor. It offers a large workspace of 220 x 220 x 250 mm and uses a Direct Drive extruder. Artillery Genius Pro
No product available!
It is used to monitor the temperature measurement and other parameters. The expansion module has an I2C / 1-Wire converter (DS2482) through which DS18B20 temperature sensors can be connected using two or three wires. MOD-29.Z
No product available!
No product available!
Computer with All Winner A10 processor, Cotex A8, 1.2GHz core, Android 4.0, RoHS
No product available!
The ST25TA02KB-P is a dynamic NFC/RFID tag IC with a digital General Purpose Output (GPO), embedding a 2 Kbit EEPROM that supports NDEF tag applications for NFC Forum Type 4
No product available!
Solarbotics GM13a 150:1 Mini Metal Gear Motor