DESCRIPTION
The JGA25-2418 / LS25R-2418 is a compact 25mm brushless DC planetary gear motor designed for robotics, automation, compact drive systems, and precision motion-control applications.
Available in 12V and 24V versions, the motor combines a brushless DC motor with an all-metal planetary gearbox for compact size, long service life, and high torque output.
Multiple gear ratios are available, providing no-load output speeds from 9 RPM to 970 RPM. The motor supports PWM speed control, CW/CCW direction control, and FG speed feedback, making it suitable for applications requiring adjustable speed and external motor control.
The 4mm D-shaped output shaft provides a secure mechanical connection for wheels, couplings, gears, and other robotic mechanisms.
KEY FEATURES
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25mm compact planetary gear motor
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Brushless DC motor
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12V and 24V options
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9–970 RPM speed options
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Multiple planetary gear ratios
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All-metal gears
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PWM speed control
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CW / CCW direction control
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FG speed feedback output
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10–30kHz PWM input
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4mm D-shaped output shaft
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12mm output shaft length
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Compact 24.2mm motor diameter
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Up to 8.2 kg·cm rated torque
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Suitable for robotics and automation
SPECIFICATIONS
| Specification | Value |
|---|---|
| Model | JGA25-2418 / LS25R-2418 |
| Motor Type | Brushless DC Planetary Gear Motor |
| Rated Voltage | 12V / 24V |
| Gear Type | Planetary Gearbox |
| Gear Material | Metal |
| No-Load Speed Range | 9–970 RPM |
| Maximum Rated Torque | 8.2 kg·cm |
| Speed Control | PWM |
| PWM Frequency | 10–30 kHz |
| Rotation Direction | CW / CCW |
| Speed Feedback | FG Output |
| Output Shaft | 4mm D-Shaped Shaft |
| Output Shaft Length | 12 mm |
| Motor Diameter | 24.2 mm |
| Mounting | 2 × M3 |
| Rotation Control Input | 0–5V |
| Direction Control | Supported |
12V PERFORMANCE
| Gear Ratio | No-Load Speed | No-Load Current | Rated Speed | Rated Current | Rated Torque | Rated Power | Stall Torque | Stall Current | Gearbox Length | Weight |
|---|---|---|---|---|---|---|---|---|---|---|
| 9.27:1 | 970 RPM | 0.12A | 640 RPM | 0.24A | 0.07 kg·cm | 2.4W | 0.35 kg·cm | 1.04A | 17.5 mm | 60 g |
| 11.45:1 | 786 RPM | 0.12A | 540 RPM | 0.24A | 0.10 kg·cm | 2.4W | 0.50 kg·cm | 1.04A | 17.5 mm | 60 g |
| 20.4:1 | 441 RPM | 0.12A | 300 RPM | 0.24A | 0.35 kg·cm | 2.4W | 1.7 kg·cm | 1.04A | 19 mm | 65 g |
| 28:1 | 321 RPM | 0.12A | 220 RPM | 0.24A | 0.42 kg·cm | 2.4W | 2.5 kg·cm | 1.04A | 19 mm | 65 g |
| 44.8:1 | 200 RPM | 0.12A | 130 RPM | 0.24A | 0.75 kg·cm | 2.4W | 3.8 kg·cm | 1.04A | 21 mm | 65 g |
| 68.2:1 | 131 RPM | 0.12A | 85 RPM | 0.24A | 1.1 kg·cm | 2.4W | 5.5 kg·cm | 1.04A | 21 mm | 65 g |
| 98.7:1 | 91 RPM | 0.12A | 65 RPM | 0.24A | 1.6 kg·cm | 2.4W | 6.5 kg·cm | 1.04A | 23 mm | 70 g |
| 166:1 | 54 RPM | 0.12A | 43 RPM | 0.24A | 2.6 kg·cm | 2.4W | 11.5 kg·cm | 1.04A | 23 mm | 70 g |
| 217:1 | 41 RPM | 0.12A | 30 RPM | 0.24A | 3.3 kg·cm | 2.4W | 15 kg·cm | 1.04A | 25 mm | 70 g |
| 406:1 | 22 RPM | 0.12A | 18 RPM | 0.24A | 5.3 kg·cm | 2.4W | 25 kg·cm | 1.04A | 25 mm | 70 g |
| 477:1 | 19 RPM | 0.12A | 15 RPM | 0.24A | 6.1 kg·cm | 2.4W | 28 kg·cm | 1.04A | 27 mm | 75 g |
| 990:1 | 9 RPM | 0.12A | 7.5 RPM | 0.24A | 8.2 kg·cm | 2.4W | 35 kg·cm | 1.04A | 27 mm | 75 g |
24V PERFORMANCE
| Gear Ratio | No-Load Speed | No-Load Current | Rated Speed | Rated Current | Rated Torque | Rated Power | Stall Torque | Stall Current | Gearbox Length | Weight |
|---|---|---|---|---|---|---|---|---|---|---|
| 9.27:1 | 970 RPM | 0.08A | 640 RPM | 0.18A | 0.07 kg·cm | 3.6W | 0.35 kg·cm | 0.55A | 17.5 mm | 60 g |
| 11.45:1 | 786 RPM | 0.08A | 540 RPM | 0.18A | 0.10 kg·cm | 3.6W | 0.50 kg·cm | 0.55A | 17.5 mm | 60 g |
| 20.4:1 | 441 RPM | 0.08A | 300 RPM | 0.18A | 0.35 kg·cm | 3.6W | 1.7 kg·cm | 0.55A | 19 mm | 65 g |
| 28:1 | 321 RPM | 0.08A | 220 RPM | 0.18A | 0.42 kg·cm | 3.6W | 2.5 kg·cm | 0.55A | 19 mm | 65 g |
| 44.8:1 | 200 RPM | 0.08A | 130 RPM | 0.18A | 0.75 kg·cm | 3.6W | 3.8 kg·cm | 0.55A | 21 mm | 65 g |
| 68.2:1 | 131 RPM | 0.08A | 85 RPM | 0.18A | 1.1 kg·cm | 3.6W | 5.5 kg·cm | 0.55A | 21 mm | 65 g |
| 98.7:1 | 91 RPM | 0.08A | 65 RPM | 0.18A | 1.6 kg·cm | 3.6W | 6.5 kg·cm | 0.55A | 23 mm | 70 g |
| 166:1 | 54 RPM | 0.08A | 43 RPM | 0.18A | 2.6 kg·cm | 3.6W | 11.5 kg·cm | 0.55A | 23 mm | 70 g |
| 217:1 | 41 RPM | 0.08A | 30 RPM | 0.18A | 3.3 kg·cm | 3.6W | 15 kg·cm | 0.55A | 25 mm | 70 g |
| 406:1 | 22 RPM | 0.08A | 18 RPM | 0.18A | 5.3 kg·cm | 3.6W | 25 kg·cm | 0.55A | 25 mm | 70 g |
| 477:1 | 19 RPM | 0.08A | 15 RPM | 0.18A | 6.1 kg·cm | 3.6W | 28 kg·cm | 0.55A | 27 mm | 75 g |
| 990:1 | 9 RPM | 0.08A | 7.5 RPM | 0.18A | 8.2 kg·cm | 3.6W | 35 kg·cm | 0.55A | 27 mm | 75 g |
CONTROL & WIRING
| Wire | Function | Type |
|---|---|---|
| Black | GND / Power Negative | Input |
| Red | VCC / Power Positive | Input |
| Yellow | FG Speed Feedback | Output |
| White | PWM Speed Control | Input |
| Orange | CW / CCW Direction Control | Input |
PWM Speed Control
The white wire accepts a 10–30kHz PWM signal for motor speed control.
FG Speed Feedback
The yellow wire provides the FG speed feedback signal. The motor outputs 9 square-wave pulses per motor revolution.
Direction Control
The orange wire controls the motor rotation direction.
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Open circuit: CCW
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Low level ≤0.6V: CW
DIMENSIONS
| Parameter | Value |
|---|---|
| Motor Diameter | 24.2 mm |
| Gearbox Diameter | 25 mm |
| Motor Section Length | 18.1 mm |
| Output Shaft Diameter | 4 mm |
| Output Shaft Length | 12 mm |
| Shaft Type | D-Shaped |
| Mounting Holes | 2 × M3 |
Gearbox length varies according to the selected gear ratio.
| Gear Ratio | Gearbox Length |
|---|---|
| 9.27 / 11.45 | 17.5 mm |
| 20.4 / 28 | 19 mm |
| 44.8 / 68.2 | 21 mm |
| 98.7 / 166 | 23 mm |
| 217 / 406 | 25 mm |
| 477 / 990 | 27 mm |
APPLICATIONS
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Mobile robots
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Robot drive systems
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Small robotic platforms
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Automated mechanisms
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Smart equipment
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Electric actuators
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Compact conveyor systems
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DIY robotics
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Educational robotics
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Precision motion-control systems
WHAT'S INCLUDED
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1 × JGA25-2418 / LS25R-2418 Brushless DC Planetary Gear Motor
FAQ
What voltages are available?
The motor is available in 12V and 24V versions.
What speed options are available?
No-load output speeds range from 9 RPM to 970 RPM depending on the selected gear ratio.
Can the motor speed be controlled?
Yes. The motor supports PWM speed control with a 10–30kHz PWM input.
Can the motor rotate in both directions?
Yes. CW and CCW direction control is supported.
Does the motor provide speed feedback?
Yes. An FG speed feedback output is provided.
What type of gearbox does it use?
The motor uses an all-metal planetary gearbox.
What is the output shaft size?
The motor uses a 4mm D-shaped output shaft with a 12mm shaft length.
