- Out-of-Stock

Solarbotics GM18 30:1 Mini Metal Gear Motor
The Solarbotics GM18 30:1 mini metal gear motor is a compact (1.14" x 0.39" x 0.47") brushed DC motor with metal gears, similar to the Sanyo motors such as NA2S, NA3S, and NA4S. 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 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
Perfect for connecting devices using Wi-Fi, Ethernet and Power over Ethernet options, the Yun combines an ATmega32u4 microcontroller with a Linux based Linino WiFi System on Chip module. A000003
No product available!
No product available!
No product available!
No product available!
No product available!
No product available!
No product available!
Universal organizer with compartments. Allows you to store small parts and tools. BOX0004
No product available!
Orange Pi Zero is a mini-computer with a powerful H2 Quad-Core ARM Cortex-A7 processor at a very good price. The computer is equipped with 256 MB DDR3 RAM, WiFi module, Ethernet 10 / 100Mbps port and 1x USB Host, 1x microUSB OTG, 26 GPIO and microSD card connector. Works with Android, Lubuntu, Debian and Raspbian systems
No product available!
Micro SDXC memory card with a capacity of 64GB, class 10 with adapter. Kingston SDCS / 64GB
No product available!
ZP120.120.60UUJ TM PC - Plastic housing ZP120.120.60 light with ears and brass sleeves PC
No product available!
Raspberry PI computer case (transparent), designed for mounting a prototype board
No product available!
No product available!
Printed circuit board for a practical workshop power supply. AVT3172 A
No product available!
No product available!
No product available!
Solarbotics GM18 30:1 Mini Metal Gear Motor