Description
The Johnson B-Grade Side-Shaft Geared Motor is a high-value, cost-effective solution for industrial automation and heavy-duty robotic projects. Engineered for applications requiring substantial torque, this side-shaft (off-centered) motor offers an excellent balance between performance and affordability. Built with a robust metal gearbox, this motor is designed to thrive in demanding environments—from household appliances like grill rotisseries and coffee machines to sophisticated robotic platforms—where durability and reliable motion are non-negotiable.
This “B-Grade” series is specifically tailored for projects where budget optimization is a priority without sacrificing operational functionality. It features a rugged, shaft-wear-resistant design with metal bushes and a coupling-ready shaft, ensuring smooth integration into your mechanical systems. Running reliably between 6V and 18V DC, it delivers 150 RPM at 12V with a significant torque of 4.7 kg-cm. Whether you are automating a custom actuator, building a multi-terrain robot, or upgrading a household appliance, this Johnson geared motor provides the consistent, high-torque power necessary to get the job done.
Note: This motor has a manufacturing tolerance of ±20% in RPM. While B-Grade motors offer excellent value, for applications requiring maximum longevity and peak torque efficiency, we recommend our “Grade A Quality” (Orange series) motors.
Key Features
- High-Torque Performance: Delivers a consistent 4.7 kg-cm of torque, providing strong driving force for medium-to-heavy mechanical loads.
- Robust Metal Gearbox: Precision-engineered metal internals ensure long-lasting operation and superior structural integrity under load.
- Off-Centered (Side) Shaft Design: The side-mounted shaft geometry allows for space-efficient mounting in compact enclosures or unique robotic chassis.
- Versatile Voltage Range: Operates smoothly across a wide 6V to 18V DC power range, offering flexibility for various battery or power supply configurations.
- Shaft-Wear Resistant: Equipped with metal bushes to minimize friction and prevent degradation at the shaft interface, significantly extending mechanical life.
Benefits
- Cost-Effective Automation: Delivers professional-grade geared performance at a budget-friendly price point, ideal for large-scale projects or prototypes.
- Easy Mechanical Coupling: The shaft features an integrated hole specifically designed for secure and rapid coupling with wheels, gears, or custom linkages.
- Reliable Industrial Build: Proven in diverse applications, from garbage disposers and welding machines to peristaltic pumps and automated coin devices.
- Simple Mounting: Features six standardized M3 mounting holes, facilitating easy attachment to robotic frames, support brackets, or panel surfaces.
- Compact and Powerful: Packs massive torque-speed capability into a small, manageable footprint, maximizing your design space.
Applications
- Robotics & Automation: Excellent for drive systems in heavy-duty robotic platforms and automated industrial actuators.
- Household Appliances: Ideal for coffee machines, oven rotisseries, grill drives, and automated towel dispensers.
- Industrial Machinery: Suited for welding machine feed systems, water meter actuators, and peristaltic pumps.
- Gaming & Vending: Reliable performance for slot machines, money detectors, and coin refund mechanisms.
- Prototyping & R&D: A fundamental choice for testing new automated mechanical designs requiring high-torque, reliable DC power.
Specifications
| Parameter | Specification |
|---|---|
| Model | Johnson B-Grade Side-Shaft |
| Operating Voltage | 6V – 18V DC (12V Nominal) |
| Rated RPM (@12V) | 150 RPM (±20% tolerance) |
| Torque | 4.7 kg-cm |
| Shaft Type | Side/Off-Centered |
| Gearbox Material | Metal |
| Mounting | 6 x M3 Holes |















