PS / PN Standard Precision Planetary Gearbox
(PS: Square Flange | PN: Round Flange — Spur Gear Design)
The PS/PN Series Standard Precision Planetary Gearbox Series is an economical, high-efficiency spur-gear planetary reducer designed for servo, stepper, and general automation applications that require reliable torque transmission and precise motion control. Built on a precision spur planetary architecture, this series offers high mechanical efficiency, compact construction, and strong torque output at an affordable cost. The internal gear train is optimized for accurate positioning, smooth rotation, and long-term durability, making it ideal for both industrial automation and light-duty servo systems.
Two output configurations are available to suit different installation preferences:
PS Series: Square flange output for rigid servo mounting and compact alignment.
PN Series: Round flange output for flexible integration and easy mechanical adaptability.
Key Features
Spur Planetary Gear Design – Ensures efficient, reliable torque transmission with simple, cost-effective construction.
High Efficiency (Up to 95%) – Optimized gear geometry reduces friction and energy loss during transmission.
Low Backlash Performance – Precision machining provides backlash ≤ 10–15 arcmin for consistent motion accuracy.
Two Output Flange Options – PS (square flange) for servo alignment; PN (round flange) for general automation layouts.
Compact and Lightweight Structure – Space-saving design with excellent torque-to-weight ratio.
Durable Gear Components – Alloy steel gears are carburized, hardened, and ground for extended service life.
Low Noise Operation – Spur gear profiles are precision-machined to minimize vibration and acoustic noise.
Universal Motor Compatibility – Modular input interface supports a wide range of servo, stepper, and DC motors.
Maintenance-Free Operation – Factory-filled with long-life synthetic grease for zero-maintenance performance.
Flexible Mounting Orientation – Usable in horizontal, vertical, or inverted installations.
PS Series – Square Flange Output (Servo-Compatible)
Square output flange matches standard servo motor interfaces.
High torsional rigidity for accurate motion and repeatable positioning.
Compact mounting structure for tight servo-axis installations.
Suitable for pick-and-place systems, CNC feed drives, and precision automation.
PN Series – Round Flange Output (Industrial Standard)
Round output housing provides simple alignment and versatile mounting options.
Designed for general automation, conveyor, and packaging equipment.
Reliable torque performance with low noise for continuous-duty operation.
Ideal for OEM machinery requiring lightweight and cost-efficient drive solutions.
Applications
The PS / PN Spur Gear Planetary Gearbox Series is ideal for medium-precision and cost-sensitive automation systems, including:
Industrial automation and robotics – compact torque reduction for servo and stepper motion control
Packaging and labeling machinery – efficient, continuous operation under repetitive load
CNC and assembly equipment – precise speed reduction and positioning accuracy
Material handling and conveyor systems – durable performance under continuous-duty operation
Testing and laboratory automation – smooth and reliable motion in compact layouts
OEM mechanical systems – cost-effective torque solutions for general-purpose machinery
Performance Advantages
Economical Precision – Optimized for cost-sensitive applications without compromising accuracy or torque density.
Compact Power Design – Planetary gear system provides high torque within minimal dimensions.
Smooth and Reliable Motion – Spur gear geometry ensures consistent torque delivery with stable output.
Energy Efficient – High transmission efficiency reduces energy consumption and operating costs.
Durable and Long-Lasting – Carburized and ground gears resist wear, maintaining their performance over time.
Low Maintenance – The sealed lubrication system eliminates the need for frequent servicing.
Flexible Integration – Available in square or round output flanges for various mounting standards.
Technical Benefits
Gear Type: Spur planetary gear reducer
Output Configuration: PS (square flange) / PN (round flange)
Gear Ratios: 3:1 to 100:1 (custom ratios available)
Efficiency: Up to 95% per stage
Backlash: PS ≤ 10 arcmin / PN ≤ 15 arcmin (standard range)
Torque Capacity: Medium torque range for servo and automation systems
Housing Material: Aluminum alloy or cast steel for strength and heat dissipation
Gear Material: Hardened alloy steel with precision-ground tooth profile
Bearing System: High-load bearings support axial and radial forces
Lubrication: Factory-sealed synthetic grease (maintenance-free)
Mounting Orientation: Universal installation — horizontal, vertical, or inverted
Motor Compatibility: Servo, stepper, and brushless DC motors
Why Choose PS / PN Series Standard Precision Planetary Gearbox
The PS/PN Series Spur Planetary Gearbox offers the perfect balance of performance, simplicity, and cost efficiency. Its spur gear construction provides high torque transmission and consistent accuracy at a competitive price, making it ideal for a wide range of automation and servo-driven applications. Choose the PS Series for direct servo mounting and rigid alignment, or the PN Series for flexible, general-purpose integration. Both models deliver the same proven quality and dependability backed by decades of precision gear engineering. Built under the core philosophy of Power, Precision, and Productivity, the PS/PN Series ensures dependable operation, smooth motion, and long service life — a reliable gearbox solution for modern automation systems.
