DESCRIPTION
The 37R-555 is a compact high-torque DC gear motor with an integrated quadrature magnetic encoder, designed for robotics, mobile platforms, automated equipment, and closed-loop motion-control applications.
Available in 12V and 24V versions, the motor provides multiple gear ratios and output speeds from approximately 11 RPM to 900 RPM. The integrated encoder provides A/B quadrature feedback for detecting motor speed, direction, and position.
The motor supports CW/CCW rotation and variable-speed operation when used with a suitable DC motor controller. A 6mm output shaft provides a robust mechanical interface for wheels, couplings, pulleys, and other drive components.
KEY FEATURES
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37mm DC gear motor
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Integrated quadrature magnetic encoder
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12V and 24V options
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Up to 900 RPM no-load output speed
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Multiple gear ratios
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Up to 40 kg·cm rated torque
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CW / CCW reversible rotation
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Variable-speed operation with compatible controller
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A/B quadrature encoder feedback
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Encoder detects speed and direction
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6mm output shaft
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12mm exposed shaft section shown in mechanical drawing
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Compact 37mm-class gearbox
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Suitable for robotics and automated motion systems
SPECIFICATIONS
| Specification | Value |
|---|---|
| Model | 37R-555 |
| Motor Type | DC Gear Motor with Encoder |
| Rated Voltage | 12V / 24V |
| No-Load Speed Range | 11–900 RPM |
| Maximum Rated Torque | 40 kg·cm |
| Rotation Direction | CW / CCW |
| Speed Control | Supported with compatible controller |
| Encoder Type | Magnetic Quadrature Encoder |
| Encoder Output | A / B Channels |
| Encoder Response Frequency | 100 kHz |
| Encoder Operating Voltage | 3.3–30V |
| Encoder Operating Temperature | -40°C to 150°C |
| Encoder ESD Rating | 4000V |
| Encoder Pole Pairs | 12 |
| Output Shaft Diameter | 6 mm |
| Shaft Type | D-Shaped |
| Motor Body Diameter | 35.8 mm |
| Gearbox Diameter | 37.3 mm |
| Mounting | 6 × M3 |
12V PERFORMANCE
| Gear Ratio | No-Load Speed | No-Load Current | Rated Speed | Rated Current | Rated Torque | Rated Power | Stall Torque | Stall Current | Weight |
|---|---|---|---|---|---|---|---|---|---|
| 10:1 | 900 RPM | 0.56A | 740 RPM | 6.2A | 2 kg·cm | 27.2W | 6 kg·cm | 23.5A | 310 g |
| 18.8:1 | 478 RPM | 0.56A | 325 RPM | 6.2A | 3 kg·cm | 27.2W | 11 kg·cm | 23.5A | 310 g |
| 30:1 | 300 RPM | 0.56A | 230 RPM | 6.2A | 6 kg·cm | 27.2W | 18 kg·cm | 23.5A | 310 g |
| 56:1 | 160 RPM | 0.56A | 135 RPM | 6.2A | 10 kg·cm | 27.2W | 32 kg·cm | 23.5A | 315 g |
| 60:1 | 150 RPM | 0.56A | 125 RPM | 6.2A | 12 kg·cm | 27.2W | 35 kg·cm | 23.5A | 315 g |
| 90:1 | 100 RPM | 0.56A | 75 RPM | 6.2A | 20 kg·cm | 27.2W | 55 kg·cm | 23.5A | 315 g |
| 120:1 | 75 RPM | 0.56A | 61 RPM | 6.2A | 25 kg·cm | 27.2W | 65 kg·cm | 23.5A | 320 g |
| 168:1 | 53 RPM | 0.56A | 43 RPM | 6.2A | 30 kg·cm | 27.2W | 90 kg·cm | 23.5A | 320 g |
| 180:1 | 50 RPM | 0.56A | 40 RPM | 6.2A | 30 kg·cm | 27.2W | 110 kg·cm | 23.5A | 320 g |
| 270:1 | 33 RPM | 0.56A | 28 RPM | 6.2A | 35 kg·cm | 27.2W | 140 kg·cm | 23.5A | 320 g |
| 240:1 | 37 RPM | 0.56A | 31 RPM | 6.2A | 40 kg·cm | 27.2W | 130 kg·cm | 23.5A | 325 g |
| 360:1 | 25 RPM | 0.56A | 20 RPM | 6.2A | 40 kg·cm | 27.2W | 160 kg·cm | 23.5A | 325 g |
| 506:1 | 17.5 RPM | 0.56A | 15 RPM | 6.2A | 40 kg·cm | 27.2W | 160 kg·cm | 23.5A | 325 g |
| 540:1 | 16.5 RPM | 0.56A | 14 RPM | 6.2A | 40 kg·cm | 27.2W | 160 kg·cm | 23.5A | 325 g |
| 810:1 | 11 RPM | 0.56A | 9 RPM | 6.2A | 40 kg·cm | 27.2W | 160 kg·cm | 23.5A | 325 g |
24V PERFORMANCE
| Gear Ratio | No-Load Speed | No-Load Current | Rated Speed | Rated Current | Rated Torque | Rated Power | Stall Torque | Stall Current | Weight |
|---|---|---|---|---|---|---|---|---|---|
| 10:1 | 900 RPM | 0.42A | 740 RPM | 4.8A | 2 kg·cm | 27.2W | 6 kg·cm | 16.5A | 310 g |
| 18.8:1 | 478 RPM | 0.42A | 325 RPM | 4.8A | 3 kg·cm | 27.2W | 11 kg·cm | 16.5A | 310 g |
| 30:1 | 300 RPM | 0.42A | 230 RPM | 4.8A | 6 kg·cm | 27.2W | 18 kg·cm | 16.5A | 310 g |
| 56:1 | 160 RPM | 0.42A | 135 RPM | 4.8A | 10 kg·cm | 27.2W | 32 kg·cm | 16.5A | 315 g |
| 60:1 | 150 RPM | 0.42A | 125 RPM | 4.8A | 12 kg·cm | 27.2W | 35 kg·cm | 16.5A | 315 g |
| 90:1 | 100 RPM | 0.42A | 75 RPM | 4.8A | 20 kg·cm | 27.2W | 55 kg·cm | 16.5A | 315 g |
| 120:1 | 75 RPM | 0.42A | 61 RPM | 4.8A | 25 kg·cm | 27.2W | 65 kg·cm | 16.5A | 320 g |
| 168:1 | 53 RPM | 0.42A | 43 RPM | 4.8A | 30 kg·cm | 27.2W | 90 kg·cm | 16.5A | 320 g |
| 180:1 | 50 RPM | 0.42A | 40 RPM | 4.8A | 30 kg·cm | 27.2W | 110 kg·cm | 16.5A | 320 g |
| 270:1 | 33 RPM | 0.42A | 28 RPM | 4.8A | 35 kg·cm | 27.2W | 140 kg·cm | 16.5A | 320 g |
| 240:1 | 37 RPM | 0.42A | 31 RPM | 4.8A | 40 kg·cm | 27.2W | 130 kg·cm | 16.5A | 325 g |
| 360:1 | 25 RPM | 0.42A | 20 RPM | 4.8A | 40 kg·cm | 27.2W | 160 kg·cm | 16.5A | 325 g |
| 506:1 | 17.5 RPM | 0.42A | 15 RPM | 4.8A | 40 kg·cm | 27.2W | 160 kg·cm | 16.5A | 325 g |
| 540:1 | 16.5 RPM | 0.42A | 14 RPM | 4.8A | 40 kg·cm | 27.2W | 160 kg·cm | 16.5A | 325 g |
| 810:1 | 11 RPM | 0.42A | 9 RPM | 4.8A | 40 kg·cm | 27.2W | 160 kg·cm | 16.5A | 325 g |
ENCODER
The integrated encoder uses a dual-channel quadrature output.
| Encoder Specification | Value |
|---|---|
| Encoder Model | H3200T |
| Output | A / B Quadrature |
| Response Frequency | 100 kHz |
| Operating Voltage | 3.3–30V |
| Operating Temperature | -40°C to 150°C |
| ESD | 4000V |
| Magnetic Ring Size | D14 × d3.2 × h5.5 |
| Magnetic Pole Pairs | 12 |
| LED | Green |
| Compatible Motor Diameter | 31 mm |
Encoder Connector
| Pin | Signal |
|---|---|
| 1 | M2 (Motor -) |
| 2 | VCC |
| 3 | A |
| 4 | B |
| 5 | GND |
| 6 | M1 (Motor +) |
DIMENSIONS
The overall motor length varies according to the selected gear ratio.
| Parameter | Value |
|---|---|
| Gearbox Diameter | 37.3 mm |
| Motor Diameter | 35.8 mm |
| Output Shaft Diameter | 6 mm |
| Shaft Flat Dimension | 5 mm |
| Shaft Projection | 22 ±0.5 mm |
| Motor Section Length | 34 mm |
| Encoder Section Length | 11 mm |
| Mounting Holes | 6 × M3 |
Gearbox length changes with the gear ratio, so confirm the corresponding mechanical drawing when designing the mounting structure.
APPLICATIONS
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Mobile robots
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Robot wheels and drive systems
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AGV prototypes
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Smart robot platforms
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Automated equipment
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Small conveyor systems
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Electric mechanisms
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Position-control systems
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Speed-control systems
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DIY robotics
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Educational robotics
WHAT'S INCLUDED
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1 × 37R-555 DC Gear Motor with Encoder
FAQ
Is the encoder included?
Yes. This version is shown with an integrated magnetic quadrature encoder.
What voltages are available?
12V and 24V versions are available.
What is the maximum no-load speed?
The highest listed no-load output speed is 900 RPM with the 10:1 gearbox.
Does the motor support speed feedback?
Yes. The integrated encoder provides A/B quadrature feedback for speed and direction detection.
Can the motor rotate in both directions?
Yes. The motor supports CW and CCW rotation when driven by a suitable bidirectional DC motor controller.
Can the speed be controlled?
Yes. Speed can be adjusted using a compatible DC motor controller.
What is the output shaft diameter?
The output shaft diameter is 6mm.
