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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).

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:

 

ated 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
			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	10	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

 

 

 

Details for item #4741:

This gearmotor is a powerful brushed DC motor with 18.75:1 metal gearbox intended for operation at 12 V. 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	540 RPM, 150 mA	8.5 kg⋅cm (120 oz⋅in), 5.5 A

Exact gear ratio: 25×30×3010×10×12=18.75:1

 

Dimensions:

 

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.

 

Gearmotor accessories:

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):

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:

 

 

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:

 

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.

 

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).

We have an assortment of Hall effect-based current sensors to choose from for those who need to monitor motor current:

Selecting the Right Gearmotor:

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.

 

 

 

Package Contains:

1 x Pololu 4741 / 4742 / 4743 / 4744 / 4745 / 4746 / 2829 Metal Gearmotor 37Dx52L mm (Helical Pinion)

 

 

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Pololu 4741 / 4742 / 4743 / 4744 / 4745 / 4746 / 2829 Metal Gearmotors without Encoder (Helical Pinion)

• Brand: Pololu
• Product Code:Pololu-Metal-Gearmotor-without-Encoder
• Reward Points:28
• Availability:In Stock

• रo 3,348.84

• Ex Tax:रo 2,838.00
• Price in reward points:2838

• ---

• 5 or more रo 3,237.92
• 10 or more रo 3,211.96
• 25 or more रo 3,186.00
• 50 or more रo 3,160.04