What is a Small Planetary Gearbox?
A small planetary gearbox offers high performance, precision, and torsional stiffness, for today's demanding servo applications.
Their compact design configuration distributes load across multiple contact points, allowing micro planetary gearboxes to deliver exceptional torque despite a small size.
Neugart's miniature planetary gearbox range includes gearboxes such as the PLE40, PLQE40, WPLE40, PLPE50, and other models suitable for compact automation solutions.
The frame size refers to the square dimension or centering collar diameter of the output flange, measuring just 40 to 60mm in width.
Inside Miniature Planetary Gearboxes
The small planetary gearbox operates through four key components working together:
1. Sun Gear
Central gear on the input shaft that drives the system.
2. Planet Gear
Multiple gears that orbit the sun gear while simultaneously meshing with both the sun and ring gears.
3. Ring Gear
Outer gear with internal teeth that typically remains stationary.
4. Planet Carrier
Holds the planet gears and connects to the output shaft.
Multi-stage miniature planetary gearboxes link these components in sequence, enabling reduction gear ratios from 3:1 to 512:1 in a compact package. Small planetary gearboxes are the most common type of coaxial gearbox because high ratios are required in a small space.
Miniature Planetary Gearbox Advantages
Small Planetary Gear Set Configurations
Economy Small Gearboxes
Our Economy Line includes the PLE40, PLQE40, WPLE40, and other models with frame sizes 040 to 060. These gearboxes deliver reliable performance when cost efficiency is essential.
Precision Planetary Gear Reducers
Engineered for applications requiring exceptional accuracy in torsional backlash and rigidity. These high-performance reducers offer superior IP protection ratings, enhanced load capacity, and versatile gearing options.
Applications for Compact, High-Torque Small Planetary Gearboxes
Robotics
High torque and precision for space-restricted robots.
Motion Control
Perfect torque and inertia matching for precise movement.
Medical Equipment
Reliable performance for peristaltic pumps and fluid delivery in tight spaces.
Commercial Systems
Cost-effective solutions for compact vending machines.
Semiconductor Manufacturing
Precise operation for sensitive production equipment.
Packaging Systems
Increased torque for compact handling units.
Core Features Across All Small Planetary Gear Sets
Versatile Configurations
Coaxial or right-angle designs with spur, helical, or bevel gear options.
Advanced Bearing Systems
Low-friction, reinforced, or preloaded bearings for optimum performance.
Flexible Output Options
Round, square, or extra-large flanges with radial shaft seals.
Space-Optimized Design
Very short gearboxes with long centering collars for tight spaces.
High Gear Ratios
Ratios from 3:1 to 512:1, equidirectional rotation, and disc/cage carrier designs suitable for various motor applications..
All Neugart small planetary gear sets and plastic planetary gearboxes deliver performance, precision, and reliability in compact packages.
They are also available with optional mounted pinions (PM1 for high feed speeds or PM2 for high feed forces), these ISO 9409-1 standardized combinations ensure perfect coordination for rack and pinion drive systems.
Small Planetary Gear Set Considerations
Compared to cycloidal and spur gearboxes, micro planetary gearboxes offer superior performance.
Higher Torque Density
Planetary designs distribute loads across multiple gear contact points, delivering greater torque transmission for a given size.
Greater Efficiency
The unique load-sharing design results in smoother, quieter operation with less energy loss.
Unlike cycloidal gearboxes, which offer good precision but lower torque, or spur gearboxes, which are simpler but less efficient, small planetary gear sets are the preferred choice for applications that demand compactness, high torque, and reliable performance.
Find Your Small Planetary Gearbox Now
Neugart delivers the perfect combination of German engineering precision and American manufacturing efficiency in every small planetary gearbox we manufacture.
Our range, from our economical PLE40 to precision-engineered PSFN55 models, ensures you'll find a compact solution for your specific needs.
With quick delivery times and comprehensive US-based support, your small planetary gear set is just a click away.
Find a Small Planetary Gearbox
Configure your gearbox here
We have developed the Tec Data Finder (TDF) so that you can configure a planetary gearbox for your needs with just a few clicks. The TDF will provide you with all relevant data, technical information and CAD models. Matched to your motor's flange, of course.
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