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50:1 Micro Metal Gearmotor HP with Extended Motor Shaft
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50:1 Micro Metal Gearmotor HP with Extended Motor Shaft
This gearmotor is a miniature (0.94" x 0.39" x 0.47"), high-power brushed DC motor with 50:1 metal gearbox, similar to Sanyo’s popular 12 mm gearmotors. These units have a 0.365"-long, 3 mm-diameter D-shaped output shaft. This version also has a 4.5 x 1 mm extended motor shaft.
Key specs at 6 V: 625 RPM and 100 mA free-run, 15 oz-in (1.1 kg-cm) and 1.6 A stall.
These tiny brushed DC gearmotors are intended for use at 6 V, though in general, these kinds of motors can run at voltages above and below this nominal voltage, so they should comfortably operate in the 3 – 9 V range (rotation can start at voltages as low as 0.5 V). Lower voltages might not be practical, and higher voltages could start negatively affecting the life of the motor. The micro metal gearmotors are available in a wide range of gear ratios—from 5:1 up to 1000:1—and offer a choice between two different motors: high-power (HP) and standard. With the exception of the 1000:1 gear ratio versions, all of the micro metal gearmotors have the same physical dimensions, so one version can be easily swapped for another if your design requirements change. Please see the micro metal gearmotor comparison table for detailed specifications of all our micro metal gearmotors. This dynamically-sortable table can help you find the gearmotor that offers the best blend of speed, torque, and current-draw for your particular application. A more basic comparison table is available below.
Some versions of the gearmotors are sold with an additional 1mm-diameter output shaft that protrudes from the rear of the motor. This 4.5mm-long rear shaft rotates at the same speed as the input to the gearbox and offers a way to add a custom-built encoder to provide motor speed or position feedback.
Gear Ratio | Speed @ 6V | Stall Torque @ 6V | Stall Current @ 6V | ![]() Gearbox Shaft Only | ![]() Gearbox & Motor Shaft |
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5:1 | 6000 RPM | 2 oz-in | 1600 mA | 5:1 micro HP | |
2500 RPM | 1 oz-in | 360 mA | 5:1 micro | ||
10:1 | 3000 RPM | 4 oz-in | 1600 mA | 10:1 micro HP | 10:1 micro HP |
1300 RPM | 2 oz-in | 360 mA | 10:1 micro | ||
30:1 | 1000 RPM | 9 oz-in | 1600 mA | 30:1 micro HP | 30:1 micro HP |
440 RPM | 4 oz-in | 360 mA | 30:1 micro | 30:1 micro | |
50:1 | 625 RPM | 15 oz-in | 1600 mA | 50:1 micro HP | 50:1 micro HP |
250 RPM | 7 oz-in | 360 mA | 50:1 micro | 50:1 micro | |
75:1 | 400 RPM | 22 oz-in | 1600 mA | 75:1 micro HP | |
170 RPM | 9 oz-in | 360 mA | 75:1 micro | ||
100:1 | 320 RPM | 30 oz-in | 1600 mA | 100:1 micro HP | 100:1 micro HP |
120 RPM | 12 oz-in | 360 mA | 100:1 micro | 100:1 micro | |
150:1 | 200 RPM | 40 oz-in | 1600 mA | 150:1 micro HP | |
85 RPM | 17 oz-in | 360 mA | 150:1 micro | ||
210:1 | 140 RPM | 50 oz-in | 1600 mA | 210:1 micro HP | |
60 RPM | 27 oz-in | 360 mA | 210:1 micro | ||
250:1 | 120 RPM | 60 oz-in | 1600 mA | 250:1 micro HP | |
50 RPM | 32 oz-in | 360 mA | 250:1 micro | ||
298:1 | 100 RPM | 70 oz-in | 1600 mA | 298:1 micro HP | 298:1 micro HP |
45 RPM | 40 oz-in | 360 mA | 298:1 micro | 298:1 micro | |
1000:1 | 32 RPM | 125 oz-in | 1600 mA | 1000:1 micro HP | |
14 RPM | 70 oz-in | 360 mA | 1000:1 micro |
Note: The 1000:1 gearmotors can generate enough torque to damage themselves. The stall torque values given for those two motors are theoretical, and we strongly recommend you avoid stalling them.
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Micro metal gearmotor dimensions (units in mm). |
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The gearbox has a long (0.365" or 9.27 mm), 3 mm-diameter D-shaped metal output shaft, and the brass faceplate has two mounting holes threaded for M1.6 screws (1.6 mm diameter, 0.35 mm thread pitch). It weighs approximately 0.35 oz (10 g). Versions with the extended motor shaft have a 1mm diameter round shaft that protrudes 4.5 mm from the rear of the motor, between the two motor terminals; this is not pictured in the above dimension diagram.
Note: The gearbox on the 1000:1 and 1000:1 HP micro metal gearmotors is 12.5 mm long. All of the other micro metal gearmotors have 9mm-long gearboxes, as shown in the above dimension diagram.
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We offer a wide selection of metal gearmotors that offer different combinations of speed and torque. Our metal gearmotor comparison table can help you find the motor that best meets your project’s requirements.
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Some of the Pololu metal gearmotors. |
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100:1 Micro Metal Gearmotor HP with Extended Motor Shaft |
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Pololu Micro Metal Gearmotor Bracket Extended Pair |
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Pololu Micro Metal Gearmotor Bracket Pair - Black |
Data sheet
A small low-power motor with a 380:1 metal gear, 6 V operating voltage, 0.02 A to 0.36 A power consumption, 36 RPM speed and a maximum torque of 2.9 kg*cm. Pololu 4790
No product available!
Small, high power motor with 1000: 1 metal gear, 12 V operating voltage, power consumption from 0.06 A to 0.75 A, speed 35 RPM, maximum torque of 10 kg * cm, carbon brushes with increased strength and double-sided shaft. Pololu 3057
No product available!
Small motor with metal gear and encoder, rotation speed 300 RPM, operating voltage 6 V. GA46-N20E-0048
DC Micro motor module with metal gear with a gear ratio of 75:1. The motor is connected to the board containing the driver. DFRobot DFR0399
Pololu low-power miniature engine, with a 15:1 transmission, shaft speed is 1400 rpm, torque is 0.2 kg * cm (0.02 Nm). Pololu 4783
Small metal gear motor, 500 RPM speed, 12V operating voltage. GA12-N20-0026
Small metal gear motor, 200 RPM speed, 6V operating voltage. GA12-N20-0015
No product available!
This gearmotor is a miniature high-power, 12 V brushed DC motor with long-life carbon brushes and a 9.96:1 metal gearbox. It has a cross section of 10 × 12 mm, and the D-shaped gearbox output shaft is 9 mm long and 3 mm in diameter.
Compact engine with 75: 1 LP transmission, shaft speed is 290 rpm, torque is 0.8 kg * cm (0.08 Nm), plate with connector PH 2.0. DFRobot FIT0457
No product available!
No product available!
No product available!
Small metal gear motor, 50 RPM speed, 6V operating voltage. GA12-N20-0010
A small medium-power motor with a 30:1 metal gear, 6 V operating voltage, 0.04 A to 0.67 A power consumption, 720 RPM, a maximum torque of 0.33 kg*cm and a double-sided shaft. Pololu 2378
No product available!
A small medium-power motor with a 380: 1 metal gear, 6 V operating voltage, 0.04 A to 0.67 A power consumption, 57 RPM and a maximum torque of 3.6 kg * cm. Pololu 4792
No product available!
Small motor with metal gear and encoder, rotation speed 500 RPM, operating voltage 6 V. GA46-N20E-0049
50:1 Micro Metal Gearmotor HP with Extended Motor Shaft