SPIDER Automation | 9T MY6812 E-Bike Motor Pinion Gear | 25H Chain Drive Replacement
The SPIDER Automation 9T MY6812 E-Bike Motor Pinion Gear is a replacement drivetrain component designed for use with the MY6812 electric bike motor. It serves as the motor-side drive gear, transferring rotational motion to a compatible chain-driven transmission.
The 9-tooth configuration is intended for a drivetrain using a matching 25H chain. Selecting a pinion with the correct motor compatibility and chain profile is important for proper mechanical engagement and drivetrain operation. This gear is suitable for replacement, repair and maintenance applications involving compatible MY6812 motor assemblies.
Technical Features & Functional Characteristics
- 9-Tooth Pinion Design: Provides the toothed motor-side interface for transferring rotational motion to the connected drivetrain.
- MY6812 Motor Application: Designed for the MY6812 e-bike motor platform.
- 25H Chain Compatibility: Intended for engagement with a compatible 25H chain.
- Compact Gear Profile: Supports integration into appropriately matched motor drive arrangements.
- Lightweight Construction: The compact gear format is suitable for applications where a small motor-side drive component is required.
- Replacement and Maintenance: Suitable for replacing a worn or damaged compatible pinion during motor or drivetrain servicing.
Applications
This pinion is intended for compatible MY6812 motor assemblies and chain-driven electric bicycle projects using a matching 25H drivetrain.
- MY6812 E-Bike Motor Repair: Replacement of a worn or damaged pinion in compatible MY6812 motor assemblies.
- 25H Chain Drive Systems: Motor-side gear application in drivetrains designed around a matching 25H chain.
- Electric Bicycle Maintenance: Replacement component for servicing the motor-to-chain drive interface.
- Custom E-Bike Builds: Use in electric bicycle projects designed around the MY6812 motor and compatible 25H chain components.
- Motor Drive Prototyping: Suitable for compatible chain-driven mechanical prototypes using the specified motor platform.
- Workshop Repairs: Replacement part for technicians maintaining MY6812 motor-driven equipment.
Package Includes
- 1 × 9T Pinion Gear for MY6812 E-Bike Motor
Product Specifications
| Parameter | Specification |
|---|---|
| Product Type | E-Bike Motor Pinion Gear |
| Motor Compatibility | MY6812 Motor |
| Number of Teeth | 9T |
| Suitable Chain | 25H |
| Outer Diameter | 21.1mm |
| Inner Diameter | 7.8mm |
| Face Width | 1.7mm |
| Weight | 4g |
Installation & Operating Recommendations
Correct compatibility between the motor shaft, pinion and chain is essential for proper drivetrain engagement. Follow these recommendations when installing or replacing the pinion.
- Confirm Motor Compatibility: Use this pinion for the MY6812 motor application.
- Check Shaft Fit: Match the motor shaft to the pinion’s inner diameter before installation.
- Use a Matching 25H Chain: Pair the pinion with a compatible 25H chain rather than assuming compatibility with other chain standards.
- Align the Drivetrain: Ensure the pinion and chain are correctly aligned to support consistent engagement.
- Secure the Pinion: Use a suitable shaft-retention arrangement compatible with the motor and pinion design.
- Check Chain Tension: Set appropriate chain tension to avoid excessive loading or poor engagement.
- Inspect During Initial Operation: Check for abnormal noise, binding or uneven chain movement after installation.
