DESCRIPTION
The GA25-310 / LS25R-310 is a compact 25mm brushed DC gear motor designed for robotics, automation, small drive systems, DIY projects, and electromechanical applications.
Available in 6V, 12V, and 24V versions, the motor combines a compact DC motor with a metal reduction gearbox. Multiple gear ratios are available for applications requiring different combinations of output speed and torque.
Depending on the selected motor and gear ratio, no-load output speeds range from approximately 6 RPM to 916 RPM, with rated torque up to 12 kg·cm.
The motor supports variable-speed control and CW/CCW reversible rotation when used with a suitable DC motor controller.
KEY FEATURES
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Compact 25mm DC gear motor
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Brushed DC motor
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6V, 12V and 24V options
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Multiple gear ratios
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6–916 RPM no-load speed range
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Up to 12 kg·cm rated torque
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Up to 3.5W rated output power
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Metal gearbox
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CW / CCW reversible rotation
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Variable-speed control with compatible controller
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4mm D-shaped output shaft
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Compact 24.2mm motor diameter
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Suitable for robotics and automation
SPECIFICATIONS
| Specification | Value |
|---|---|
| Model | GA25-310 / LS25R-310 |
| Motor Type | Brushed DC Gear Motor |
| Rated Voltage | 6V / 12V / 24V |
| Gearbox Type | Metal Reduction Gearbox |
| Gear Ratio Range | 9.27:1–990:1 |
| No-Load Speed Range | 6–916 RPM |
| Maximum Rated Torque | 12 kg·cm |
| Maximum Rated Power | 3.5W |
| Rotation Direction | CW / CCW |
| Speed Control | Supported with compatible controller |
| Output Shaft | 4mm D-Shaped Shaft |
| Output Shaft Length | 14 ±0.5 mm |
| Gearbox Diameter | 25 mm |
| Motor Diameter | 24.2 mm |
| Mounting Holes | 2 × M3 |
| Weight | 60–75 g |
AVAILABLE GEAR RATIOS
| Gear Ratio | Gearbox Length |
|---|---|
| 9.27:1 | 17.5 mm |
| 11.45:1 | 17.5 mm |
| 20.4:1 | 19 mm |
| 28:1 | 19 mm |
| 44.8:1 | 21 mm |
| 68.2:1 | 21 mm |
| 98.7:1 | 23 mm |
| 166:1 | 23 mm |
| 217:1 | 25 mm |
| 406:1 | 25 mm |
| 477:1 | 27 mm |
| 990:1 | 27 mm |
6000 MOTOR PERFORMANCE
6V
| Gear Ratio | No-Load Speed | Rated Speed | Rated Torque | Stall Torque |
|---|---|---|---|---|
| 9.27:1 | 647 RPM | 420 RPM | 0.2 kg·cm | 0.5 kg·cm |
| 11.45:1 | 524 RPM | 350 RPM | 0.3 kg·cm | 0.7 kg·cm |
| 20.4:1 | 294 RPM | 200 RPM | 0.5 kg·cm | 1.3 kg·cm |
| 28:1 | 214 RPM | 160 RPM | 0.6 kg·cm | 1.8 kg·cm |
| 44.8:1 | 133 RPM | 130 RPM | 0.9 kg·cm | 2.8 kg·cm |
| 68.2:1 | 88 RPM | 85 RPM | 1.2 kg·cm | 3.5 kg·cm |
| 98.7:1 | 61 RPM | 45 RPM | 1.5 kg·cm | 4.5 kg·cm |
| 166:1 | 36 RPM | 28 RPM | 2.4 kg·cm | 7.2 kg·cm |
| 217:1 | 27 RPM | 23 RPM | 2.8 kg·cm | 8.6 kg·cm |
| 406:1 | 14.5 RPM | 12.5 RPM | 3.5 kg·cm | 11.2 kg·cm |
| 477:1 | 12.5 RPM | 12 RPM | 4.5 kg·cm | 13.5 kg·cm |
| 990:1 | 6 RPM | 5.5 RPM | 8 kg·cm | 22 kg·cm |
12V
| Gear Ratio | No-Load Speed | Rated Speed | Rated Torque | Stall Torque |
|---|---|---|---|---|
| 9.27:1 | 647 RPM | 420 RPM | 0.2 kg·cm | 0.5 kg·cm |
| 11.45:1 | 524 RPM | 350 RPM | 0.3 kg·cm | 0.7 kg·cm |
| 20.4:1 | 294 RPM | 200 RPM | 0.5 kg·cm | 1.3 kg·cm |
| 28:1 | 214 RPM | 160 RPM | 0.6 kg·cm | 1.8 kg·cm |
| 44.8:1 | 133 RPM | 130 RPM | 0.9 kg·cm | 2.8 kg·cm |
| 68.2:1 | 88 RPM | 85 RPM | 1.2 kg·cm | 3.5 kg·cm |
| 98.7:1 | 61 RPM | 45 RPM | 1.5 kg·cm | 4.5 kg·cm |
| 166:1 | 36 RPM | 28 RPM | 2.4 kg·cm | 7.2 kg·cm |
| 217:1 | 27 RPM | 23 RPM | 2.8 kg·cm | 8.6 kg·cm |
| 406:1 | 14.5 RPM | 12.5 RPM | 3.5 kg·cm | 11.2 kg·cm |
| 477:1 | 12.5 RPM | 12 RPM | 4.5 kg·cm | 13.5 kg·cm |
| 990:1 | 6 RPM | 5.5 RPM | 8 kg·cm | 22 kg·cm |
24V
| Gear Ratio | No-Load Speed | Rated Speed | Rated Torque | Stall Torque |
|---|---|---|---|---|
| 9.27:1 | 647 RPM | 420 RPM | 0.2 kg·cm | 0.5 kg·cm |
| 11.45:1 | 524 RPM | 350 RPM | 0.3 kg·cm | 0.7 kg·cm |
| 20.4:1 | 294 RPM | 200 RPM | 0.5 kg·cm | 1.3 kg·cm |
| 28:1 | 214 RPM | 160 RPM | 0.6 kg·cm | 1.8 kg·cm |
| 44.8:1 | 133 RPM | 130 RPM | 0.9 kg·cm | 2.8 kg·cm |
| 68.2:1 | 88 RPM | 85 RPM | 1.2 kg·cm | 3.5 kg·cm |
| 98.7:1 | 61 RPM | 45 RPM | 1.5 kg·cm | 4.5 kg·cm |
| 166:1 | 36 RPM | 28 RPM | 2.4 kg·cm | 7.2 kg·cm |
| 217:1 | 27 RPM | 23 RPM | 2.8 kg·cm | 8.6 kg·cm |
| 406:1 | 14.5 RPM | 12.5 RPM | 3.5 kg·cm | 11.2 kg·cm |
| 477:1 | 12.5 RPM | 12 RPM | 4.5 kg·cm | 13.5 kg·cm |
| 990:1 | 6 RPM | 5.5 RPM | 8 kg·cm | 22 kg·cm |
8500 MOTOR PERFORMANCE
The higher-speed 8500 motor version provides no-load output speeds from 8.5 RPM to 916 RPM, depending on the selected gear ratio.
| Gear Ratio | No-Load Speed | 6V Rated Torque | 12V Rated Torque | 24V Rated Torque |
|---|---|---|---|---|
| 9.27:1 | 916 RPM | 0.3 kg·cm | 0.35 kg·cm | 0.35 kg·cm |
| 11.45:1 | 742 RPM | 0.3 kg·cm | 0.35 kg·cm | 0.35 kg·cm |
| 20.4:1 | 416 RPM | 0.5 kg·cm | 0.6 kg·cm | 0.6 kg·cm |
| 28:1 | 303 RPM | 0.7 kg·cm | 0.8 kg·cm | 0.8 kg·cm |
| 44.8:1 | 189 RPM | 1.1 kg·cm | 1.3 kg·cm | 1.3 kg·cm |
| 68.2:1 | 124 RPM | 1.4 kg·cm | 1.8 kg·cm | 1.8 kg·cm |
| 98.7:1 | 86 RPM | 1.9 kg·cm | 2.2 kg·cm | 2.2 kg·cm |
| 166:1 | 51 RPM | 2.3 kg·cm | 3.5 kg·cm | 3.5 kg·cm |
| 217:1 | 39 RPM | 3.5 kg·cm | 4.5 kg·cm | 4.5 kg·cm |
| 406:1 | 21 RPM | 5.2 kg·cm | 5.5 kg·cm | 5.5 kg·cm |
| 477:1 | 17.8 RPM | 6.5 kg·cm | 7 kg·cm | 7 kg·cm |
| 990:1 | 8.5 RPM | 12 kg·cm | 12 kg·cm | 12 kg·cm |
DIMENSIONS
| Parameter | Value |
|---|---|
| Gearbox Diameter | 25 mm |
| Motor Diameter | 24.2 mm |
| Output Shaft Diameter | 4 mm |
| D-Flat Dimension | 3.5 mm |
| Output Shaft Length | 14 ±0.5 mm |
| D-Flat Length | 9 mm |
| Mounting Holes | 2 × M3 |
| Mounting Hole Spacing | 17 ±0.2 mm |
| Motor Section Length | 18.1 mm |
| Weight | 60–75 g |
Gearbox length varies according to the selected gear ratio.
SPEED & DIRECTION CONTROL
The motor can be connected to a compatible DC motor speed controller for adjustable-speed operation.
A suitable bidirectional controller can also be used to change the motor rotation between CW and CCW.
The motor itself has two power terminals. Reverse the applied polarity, or use a compatible reversing motor driver, to change the rotation direction.
APPLICATIONS
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Small mobile robots
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Robot drive systems
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Smart car projects
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Compact robotic mechanisms
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DIY robotics
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Educational robots
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Small automation equipment
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Electric actuators
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Mini conveyor systems
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Rotating mechanisms
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Precision low-speed drive systems
WHAT'S INCLUDED
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1 × GA25-310 / LS25R-310 DC Gear Motor
FAQ
What voltages are available?
6V, 12V and 24V versions are available.
Is this a brushless motor?
No. This is a brushed DC motor with a reduction gearbox.
Can the motor speed be adjusted?
Yes. The motor can be speed-controlled using a compatible DC motor speed controller.
Can it rotate in both directions?
Yes. CW and CCW rotation are supported by reversing the motor polarity or using a bidirectional motor controller.
What is the output shaft diameter?
The motor uses a 4mm D-shaped output shaft.
What is the maximum rated torque?
The highest listed rated torque is 12 kg·cm for the 8500 motor with the 990:1 gearbox.
Does the motor include an encoder?
No encoder is shown or specified for this version.
