SPIDER Automation | MY6812 12V 150W Brushed DC Motor | 2750RPM Chain-Drive Motor with 9T #25 Sprocket
The SPIDER Automation MY6812 12V 150W Brushed DC Motor is designed for compact electric drive systems used in compatible scooters, small electric carts, bicycle projects and robotics applications. It operates on a 12V DC supply and has a listed operating power of 150W with a rated rotational speed of 2750RPM. The brushed DC design is intended for use with a suitable brushed motor controller.
This chain-drive version is supplied with a 9-tooth sprocket for #25 chain. The shaft arrangement includes an 8mm D-cut profile and circlip retention for the fitted shaft component described in the source. The motor is also described as having ball-bearing construction. These features make it suitable for drivetrain projects where the motor shaft, sprocket, chain and mounting arrangement are correctly matched.
Product Overview & Motor Construction
The MY6812 is a compact brushed DC motor intended for low-voltage electric drive applications. Its 12V operating voltage and 150W power rating make it suitable for compatible small vehicle and equipment systems. As a brushed motor, it requires a controller designed for brushed DC motor operation.
This version has a chain-drive output with a pre-fitted 9-tooth sprocket for #25 chain. The 8mm D-cut shaft and circlip-retained arrangement provide a defined mechanical interface for compatible components. The source also identifies ball-bearing construction.
Technical Features & Performance Characteristics
- MY6812 Model: Identifies the motor model for selecting compatible replacement motors and drive-system components.
- Brushed DC Motor Technology: Uses a brushed commutation arrangement and requires a suitable brushed DC controller.
- 150W Operating Power: Specified for compact electric drive applications requiring a 150W motor.
- 12V DC Operating Voltage: Designed for compatible 12V electrical systems.
- 2750RPM Rated Speed: Provides a rotational speed reference for selecting the chain reduction ratio and driven load.
- 9-Tooth Drive Sprocket: Supplied with a 9T sprocket for compatible #25 chain.
- 8mm D-Cut Shaft: Provides a shaft interface with an 8mm nominal dimension and a flat-sided D profile.
- Circlip Retention: The source describes a circlip-retained shaft component that can be released for removal where the assembly permits.
- Ball-Bearing Construction: Described as using ball bearings in the motor construction.
- Chain-Drive Configuration: Supports mechanical power transmission through a compatible chain and driven sprocket arrangement.
Chain-Drive Output & Sprocket Compatibility
The motor is supplied with a 9-tooth sprocket intended for #25 chain. The sprocket transfers motor rotation to a compatible driven sprocket through a chain-drive arrangement. The final output speed and torque at the driven shaft or wheel depend on the selected sprocket ratio and the mechanical load.
Use a matching #25 chain and driven sprocket. Chain pitch, roller dimensions, sprocket tooth profile and alignment must be compatible. Do not assume that this sprocket is interchangeable with 25H, 410, 420 or T8F chain components; those are different chain designations.
Shaft Design & Mechanical Interface
The motor is described with an 8mm D-cut shaft. The D-shaped profile provides a flat reference surface for compatible mechanical components. The source also describes a circlip-retained arrangement, which allows the fitted shaft component to be removed after the circlip is correctly released.
Before installation, check the mating component’s bore, D-flat geometry, axial position and retention method. Do not assume that every 8mm pulley, sprocket or coupling will fit this shaft correctly.
Electrical Configuration & Controller Compatibility
This motor is specified for 12V DC operation and uses brushed DC motor technology. It must be paired with a compatible brushed motor controller suitable for the motor’s electrical requirements. A BLDC controller is not an interchangeable substitute because brushless motors use a different commutation arrangement.
The supplied description does not establish the motor wire colours, connector type or terminal polarity. Follow the motor and controller wiring documentation when connecting the unit. Select the battery, controller and wiring as a matched electrical system.
Applications
The MY6812 motor can be used in compact electric drive systems where its 12V supply, 150W rating, shaft arrangement and #25 chain-drive output are suitable for the intended equipment.
- Electric Scooter Projects: Drive motor integration in compatible small scooters designed for a 12V brushed DC motor.
- Small Electric Carts: Use in compact electric carts with a matching motor mount and chain-drive transmission.
- Electric Bicycle Projects: Motor integration in compatible custom bicycle drive systems designed around the MY6812 motor and #25 chain interface.
- Robotics Platforms: Use in mobile robotics systems requiring a compact brushed DC motor and mechanical chain transmission.
- Chain-Driven Mechanisms: Power transmission for compatible mechanisms using a #25 chain and matching driven sprocket.
- Small Electric Vehicle Prototypes: Integration in engineering prototypes designed around the motor’s voltage and power rating.
- Replacement Motor Installations: Replacement of an existing MY6812 motor when the electrical, shaft and mounting interfaces match.
- Educational Engineering Builds: Use in supervised motor-control and mechanical-drive demonstrations.
- Compact Drive Assemblies: Motor integration in equipment requiring a 12V brushed motor with a pre-fitted chain sprocket.
- Custom Mechanical Projects: Use in compatible projects requiring a D-cut shaft and chain-drive output.
Package Includes
- 1 × MY6812 12V 150W Brushed DC Motor with 9-Tooth #25 Chain Sprocket
Product Specifications
| Parameter | Specification |
|---|---|
| Product Type | Electric DC Motor |
| Model Number | MY6812 |
| Motor Type | Brushed DC Motor |
| Operating Voltage | 12V DC |
| Operating Power | 150W |
| Rated Speed | 2750RPM |
| Drive Configuration | Chain Drive |
| Supplied Sprocket | 9 Teeth (9T) |
| Chain Compatibility | #25 Chain |
| Shaft Type | D-Cut Shaft |
| Shaft Size | 8mm nominal dimension |
| Shaft Retention | Circlip-retained arrangement, as described |
| Bearing Construction | Ball-bearing construction, as described |
| Motor Controller Type | Compatible 12V brushed DC motor controller |
| Package Quantity | 1 Motor Assembly |
Connection & Operating Recommendations
Before powering the motor, confirm that the battery and controller are suitable for a 12V brushed DC motor and that the mechanical drivetrain matches the supplied #25 chain sprocket and shaft arrangement.
- Use a Brushed Motor Controller: Select a controller designed for brushed DC motors and suitable for the motor’s 12V operating configuration.
- Match the Power Supply: Use a compatible 12V DC battery system and ensure that the controller and wiring are selected for the motor’s operating requirements.
- Match the #25 Chain: Use a compatible #25 chain and driven sprocket. Do not substitute a different chain series based only on visual similarity.
- Check Sprocket Alignment: Align the motor sprocket and driven sprocket to avoid uneven chain loading, excessive wear and derailment.
- Inspect the D-Cut Shaft: Confirm that the mating component matches the 8mm D-cut profile and has suitable axial retention.
- Handle the Circlip Correctly: Use suitable circlip tools when removing or refitting the retaining clip. Ensure the component is securely retained before operation.
- Secure the Motor Mount: Use a rigid mounting arrangement appropriate for the motor’s torque reaction and the equipment’s operating conditions.
- Verify Electrical Connections: Follow the correct wiring documentation for terminal polarity and controller connections rather than assuming wire functions.
- Test Before Applying Load: Check motor rotation, chain tracking, mechanical clearance and controller response during an initial unloaded test.
