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28mm Planetary Gearbox & Reducer

This 28mm planetary gearbox is designed for compact drive systems that need higher torque density with flexible stage selection, offering multiple length options and a customizable output shaft for clean integration.

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  • 28mm Planetary Gearbox & Reducer Featured Image
Specs

Key Features

This planetary gearbox combines machining/sintering process options with multi-stage configurations to balance torque, length, and ratio selection in compact transmissions.

  • Gear ratio coverage from 4 to 625 for broad speed-to-torque matching
  • 1–4 stage configurations with defined length options for packaging control
  • Planetary structure supports stable output under higher torque demand
  • Machining/sintering process options for different cost and performance targets
  • Customizable output shaft interface to simplify coupler and load connection
technical Specs

Motors Specifications

Stages Length (mm) Gear Ratios
1 22.9 4:1, 5:1
2 28.7 16:1, 20:1, 25:1
3 34.4 64:1, 80:1, 100:1, 125:1
4 40 256:1, 320:1, 400:1, 500:1, 625:1

For additional customization or reference configurations, please feel free to contact us.

Why Choose us

SLW Motor Highlights

  • Stage-based length control

    Each stage level has a defined length, making it easier to select a ratio class without guessing the final packaging envelope.

  • Wide reduction coverage without changing diameter

    From 4:1 to 625:1, you can keep the 28mm interface while scaling output speed and torque to different mechanisms.

  • Lower stages for response, higher stages for torque

    1–2 stage options prioritize shorter length and better response. 3–4 stage options are selected when low-speed stability and torque margin matter more.

  • Custom output shaft for integration repeatability

    Defining shaft geometry early helps reduce adapter stacking and keeps the coupling interface consistent across build variants.

Custom

Beyond the Standard: Performance Customized

  • 01
    Adaptive Wiring & Lead Routing
    Customize lead paths to fit your housing and mounting design perfectly—keeping wiring safely clear of couplers and fasteners for hassle-free assembly and maintenance.
  • 02
    Customized Output Shaft Interface
    Configure shaft ends precisely to your coupling system, enhancing anti-slip performance and ensuring repeatable, reliable assembly every time.
  • 03
    Installation Orientation Optimization
    Share your mounting direction and load conditions so that the chosen gear stage and ratio deliver stable operation under both axial and radial forces.
  • 04
    Control System Synchronization
    Match your control strategy to the gearbox stage selection to minimize peak torque spikes during acceleration, braking, and holding phases—protecting system integrity.
  • 05
    Application-Specific Configuration
    Provide details on load inertia, duty cycle, and positioning needs to perfectly align ratio classes and output interfaces with your unique application requirements.
  • Adaptive Wiring & Lead Routing
  • Customized Output Shaft Interface
  • Installation Orientation Optimization
  • Control System Synchronization
  • Application-Specific Configuration

Custom Now

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FAQ

Frequently Asked Questions

Higher stage counts are typically selected to reach higher ratios while controlling the gearbox length in compact assemblies.

How do I choose the gearbox stage level?
Choose 1–2 stages when you need shorter length and faster response. Choose 3–4 stages when you need higher reduction and torque margin.
Which ratios are best for moderate reduction needs?
Ratios like 16:1, 20:1, and 25:1 are commonly selected when you need a balance between speed reduction and torque increase.
When should I select ratios above 256:1?
Higher ratios are typically selected for low-speed output where torque margin and steadier motion are priorities.
What is the benefit of keeping the same 28mm diameter across ratios?
It allows you to change ratio targets without redesigning the mounting interface and surrounding structure.
What do you need to define a custom output shaft?
Your coupling method, assembly process, and any slip or positioning constraints.
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