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This gearmotor is a powerful brushed DC motor with 10:1 metal gearbox intended for operation at 12 V. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available with an integrated encoder.
Key specifications:
voltage | no-load performance | stall extrapolation |
12 V | 1000 RPM, 150 mA | 4.9 kg⋅cm (68 oz⋅in), 5.5 A |
See Description for more details about the product.
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These powerful brushed DC gearmotors are available in a variety of different gear ratios. Versions with an integrated quadrature encoder are also available, including just the motor and encoder portion by itself (no gearbox).
Rated Voltage | Stall Current | No-Load Current | Gear Ratio | No-Load Speed (RPM) | Extrapolated Stall Torque | Max Power (W) |
Without Encoder |
With Encoder |
|
(kg ⋅ cm) | (oz ⋅ in) | ||||||||
12 V | 5.5 A | 0.15 A | 1:1 (no gearbox) | 10,000 |
0.5 |
7 | - | - | item #4750 |
6.3:1 | 1600 | 3.0 | 42 | 12 | item #4747 | item #4757 | |||
10:1 | 1000 | 4.9 | 68 | 12 | item #4748 | item #4758 | |||
19:1 | 540 | 8.5 | 120 | 12 | item #4741 | item #4751 | |||
30:1 | 330 | 14 | 190 | 12 | item #4742 | item #4752 | |||
50:1 | 200 | 21 | 290 | 10 | item #4743 | item #4753 | |||
70:1 | 150 | 27 | 380 | 8 | item #4744 | item #4754 | |||
100:1 | 100 | 34 | 470 | 8 | item #4745 | item #4755 | |||
131:1 | 76 | 45 | 630 | 6 | item #4746 | item #4756 | |||
150:1 | 67 | 49 | 680 | 6 | item #2829 | item #2828 |
Note: Stalling or overloading gearmotors can greatly decrease their lifetimes and even result in immediate damage. In order to avoid damaging the gearbox, we recommend keeping continuously applied loads under 10 kg-cm (150 oz-in), and the recommended upper limit for instantaneous torque is 25 kg-cm (350 oz-in). Stalls can also result in rapid (potentially on the order of seconds) thermal damage to the motor windings and brushes; a general recommendation for brushed DC motor operation is 25% or less of the stall current.
These motors are intended for use at 12 V, though in general, these kinds of motors can run at voltages above and below the nominal voltage (they can begin rotating at voltages as low as 1 V). Lower voltages might not be practical, and higher voltages could start negatively affecting the life of the motor.
The gearboxes are composed mainly of spur gears, but they feature helical gears for the first stage for reduced noise and improved efficiency:
37D Gearmotor (Helical Pinion) with the gearbox removed showing the helical pinion gear and first mating gear.
This gearmotor is a powerful brushed DC motor with 10:1 metal gearbox intended for operation at 12 V. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available with an integrated encoder.
voltage | no-load performance | stall extrapolation |
12 V | 1000 RPM, 150 mA | 4.9 kg⋅cm (68 oz⋅in), 5.5 A |
Dimensions of the 37D mm metal gearmotor (without encoder). Units are mm over [inches].
Warning: Do not screw too far into the mounting holes as the screws can hit the gears. We recommend screwing no more than 3mm (0.12″) into the screw hole.
The face plate has six mounting holes evenly spaced around the outer edge threaded for M3 screws. These mounting holes form a regular hexagon and the centers of neighboring holes are 15.5 mm apart. We carry two brackets for these gearmotors: a stamped aluminum L-bracket (sold in pairs) and a sturdier, tombstone-style machined aluminum bracket (sold individually):
37D mm gearmotor (without encoder) with L-bracket and 6mm universal mounting hub.
Pololu machined aluminum bracket for 37D mm metal gearmotors mounting a motor to a clear piece of acrylic.
The 6 mm diameter gearbox output shaft works with the Pololu universal aluminum mounting hub for 6mm shafts, which can be used to mount our larger Pololu wheels (80mm- and 90mm-diameter) or custom wheels and mechanisms to the gearmotor’s output shaft as shown in the left picture below. Alternatively, you could use our 6mm scooter wheel adapter to mount many common scooter, skateboard, and inline skate wheels to the gearmotor’s output shaft as shown in the right picture below:
Black Pololu Wheel 90×10mm on a Pololu 37D mm Metal Gearmotor.
A 37D mm gearmotor connected to a scooter wheel by the 6 mm scooter wheel adapter.
For a general-purpose hex adapter, consider our 12mm hex wheel adapter (also available in an extended version), which lets you use these motors with many common hobby RC wheels, including Dagu Wild Thumper Wheels:
12mm Hex Wheel Adapter for 6mm Shaft connecting a Wild Thumper Wheel to a 37D mm Metal Gearmotor.
We have a number of motor drivers and motor controllers that work with these 37D mm metal gearmotors. We generally recommend our High-Power Motor Drivers, which are available in various power levels and versions, including some dual-channel shields for Arduino and dual-channel expansion boards for Raspberry Pi. Additionally, our VNH5019-based motor drivers, which are also available as single and dual carriers, are a good match for these gearmotors.
Pololu Dual G2 High-Power Motor Driver 24v14 Shield for Arduino.
Pololu Dual G2 High-Power Motor Driver 24v14 for Raspberry Pi (assembled version) with included hardware.
Pololu dual VNH5019 motor driver shield for Arduino.
If you are looking for higher-level control interfaces, such as USB, RC, analog voltages, I²C, or TTL serial, consider our Simple Motor Controllers, Jrk motor controllers, or RoboClaw motor controllers; these controllers are available in various power levels several of which can handle these 37D mm metal gearmotors (we generally recommend a motor controller that can handle continuous currents above the stall current of your motor).
High-Power Simple Motor Controller G2 18v15.
Jrk G2 21v3 USB Motor Controller with Feedback.
RoboClaw 2×7A Motor Controller (V5B) in its included case.
We have an assortment of Hall effect-based current sensors to choose from for those who need to monitor motor current:
ACS711EX current sensor carrier -15.5A to +15.5A.
ACS714 current sensor carrier -5A to +5A.
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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