High Ratio Cycloidal Drive APH072

The APH072 is a compact, high-torque cycloidal speed reducer from PJM Automation. It uniquely combines a size-72 harmonic-drive style housing (90 mm diameter) with a single-stage cycloidal mechanism. This design delivers rated output torque of 60–90 Nm (with peak torque ≈3× rated) in a very small footprint. The cycloidal gearset evenly distributes loads across multiple pins, yielding exceptional robustness and shock-load resistance. At the same time the precision profile gives virtually zero backlash (≤10 arcmin) and very smooth, repeatable motion. These features make the APH072 ideal for precision automation and robotics where high torque density, accuracy and rigidity are required.

Key Specification

Size Drawing:

Customization Options

• Custom Gear Ratios: Bespoke reduction ratios from 13:1 up to 79:1 can be supplied to match specific speed/torque requirements.

• Shaft Configurations: Available with solid keyed output, hollow output (for through-shafts), or dual outputs as needed for your mechanism.

• Motor Flanges and Couplings: Choice of motor-to-gearbox flanges and shaft adapters to mate with most servo/stepper motors or actuators.

• Mounting Flanges and Interfaces: Custom mounting faces (e.g. foot, face, or rear flange) can be designed for easy integration.

• Sealing & Protection: Upgradable to higher IP ratings (IP65/IP67) and special seals for harsh environments.

• Lubrication: Options for long-life grease, special lubricants, or pre-filled/maintenance-free versions.

Design and Structural Advantages

• Cycloidal Pin-Wheel Mechanism: Multi-lobed cam and pin engagement shares torque over many teeth, giving very high torque capacity and shock-resistance.

• Even Load Distribution: The cycloidal disc's motion distributes forces across multiple contact points, reducing stress on any single tooth. The result is excellent overload and impact resistance and long life.

• High-Strength Materials: Core components (eccentric cam, pins, housing) are made of hardened alloy steel with precision heat-treatment for durability and fatigue resistance.

• Coaxial In-Line Design: Input and output shafts are co-axial, saving space and simplifying integration. The low-profile 90 mm housing fits compact installations.

• Near-Zero Backlash: Precision manufacturing yields minimal clearance (≤10 arcmin), effectively zero backlash. This provides very smooth motion and high position accuracy.

• High Rigidity and Smoothness: Rolling-element motion and tight tolerances give high torsional stiffness and low vibration, ideal for precise positioning.

• Modular Construction: The APH072's design is modular – flanges, shafts and attachments can be rapidly swapped or customized to customer needs, shortening lead time for special configurations.

Typical Applications

• Industrial Robotics: Compact robot arms and 6-axis manipulators demand high torque in tight spaces; the APH072 is ideal for these actuators. Its high precision and stiffness suit both heavy-duty robots and sensitive cobots.

• Collaborative Robot Joints: Precision motion and safe operation in cobots benefit from the APH072's smooth, backlash-free drive and high overload capacity.

• AGVs and Mobile Platforms: Automated guided vehicles and mobile robots can use the APH072 for wheel drives or steering, where its high torque density and compact size improve maneuverability.

• Precision CNC & Motion Systems: In CNC machine tools, indexing tables, rotary tables or precision positioning systems, the APH072 provides high accuracy and rigidity. Its low backlash and stiffness help maintain tight tolerances.

• Automation Equipment: In assembly machines, packaging systems or material handling, any application needing a compact, robust reducer with high torque and low lost-motion can benefit from this cycloidal drive.