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28mm Diameter Brushless DC Motor With Planetary Gearbox

The 28mm platform supports 6–48V systems, with multiple ratios and gearbox lengths available to match the required output speed and torque.

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28mm brushless DC planetary gear motor for 6-48V systems
Specs

Key Features

This model is a planetary BLDC gear motor built around a speed–torque staircase and gearbox-length buckets, making selection straightforward when you need scalable torque without changing the motor platform.

  • 6V–48V applied range supports broad system voltage architectures
  • Planetary gearbox ratio ladder (4 to 625) provides step-by-step output tuning for different load classes
  • Power level is listed as 11.2W across the provided configurations, helping keep performance planning consistent
  • Gearbox length buckets (23.2 / 28.8 / 34.6 / 40.4 mm) support enclosure-controlled designs that must reuse mounts
  • Rated load current is shown as 1.25A across the table, helping driver sizing stay predictable while ratios change
technical Specs

Motors Specifications

Reduction ratio No-Load Rated Load Stall Gearbox Length (MM)
Rated Voltage (V) Speed (RPM ±10%) Current (A) Speed (RPM ±10%) Current (A) Torque (Kg.cm) Power (W) Torque (Kg.cm) Current (A)
4 12 2000 0.36 1600 1.25 0.5 11.2 1.5 3.4 23.2
16 12 500 0.36 380 1.25 2 11.2 5.8 3.4 28.8
25 12 320 0.36 240 1.25 3 11.2 9 3.4
64 12 125 0.36 95 1.25 6 11.2 21 3.4 34.6
80 12 100 0.36 73 1.25 8 11.2 26 3.4
100 12 80 0.36 62 1.25 10 11.2 32 3.4
125 12 64 0.36 48 1.25 14 11.2 41 3.4
138 12 58 0.36 45 1.25 15 11.2 45 3.4
256 12 31 0.36 26 1.25 25 11.2 75 3.4 40.4
320 12 25 0.36 22 1.25 35 11.2 95 3.4
400 12 20 0.36 17 1.25 40 11.2 118 3.4
500 12 16 0.36 14 1.25 50 11.2 150 3.4
625 13 12.8 0.36 11 1.25 60 11.2 170 3.4

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

Why Choose us

SLW Motor Highlights

  • Speed–Torque Staircase for Selection

    This table gives clear “steps” from higher speed / lower torque to very low speed / high torque, so you can pick a ratio based on output behavior instead of trial-and-error tuning.

  • Gearbox Length Buckets That Protect Your Enclosure Design

    Ratios group into a few gearbox lengths. That helps you keep the same housing and mounts while expanding variants by ratio.

  • Consistent Power Planning Across Ratios

    The listed power stays at 11.2W in the provided configurations, which helps keep system expectations stable while you switch ratios for different loads.

  • Driver Sizing Becomes More Predictable

    Because the rated load current is listed consistently, you can focus on ratio choice for mechanics and reserve driver changes for edge cases.

Custom

Beyond the Standard: Performance Customized

  • 01
    Voltage Architecture Fit (6–48V)
    We confirm your supply range and control method first, then align the configuration so the motor fits your voltage architecture without forcing a redesign.
  • 02
    Gearbox Length Bucket Lock-In
    If your enclosure has a strict “max gearbox length,” we lock the allowable length bucket first, then only shortlist ratios that stay inside it.
  • 03
    Output Behavior Definition by Ratio Steps
    We map your target RPM and required torque to the nearest “ratio step,” so the selected option lands close to your motion feel without excessive compensation.
  • 04
    Driver Margin Under Load Transitions
    We evaluate current headroom for startup and load spikes so the driver stays stable when the mechanism sees friction changes or brief overloads.
  • 05
    Variant Strategy for Multi-Ratio Product Lines
    If you plan multiple SKUs, we group ratios into a small set of gearbox-length buckets so you can reuse mounts and keep BOM changes contained.
  • Voltage Architecture Fit (6–48V)
  • Gearbox Length Bucket Lock-In
  • Output Behavior Definition by Ratio Steps
  • Driver Margin Under Load Transitions
  • Variant Strategy for Multi-Ratio Product Lines

Custom Now

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FAQ

Frequently Asked Questions

If you share your available space and the driven load type, we can help narrow the most suitable configuration quickly.

How do I choose between the ratios quickly?
Match the rated speed to your target output RPM first, then verify rated torque gives enough margin for your real load.
Why does gearbox length change across ratios?
Higher reductions typically need more gear stages, which increases gearbox length. This table lets you choose speed, torque, and length together.
Which ratios fit the shortest gearbox envelope?
The lowest ratio option lists the shortest gearbox length, so it suits the tightest installation spaces.
What should I share so you can shortlist the best options?
Share your allowed gearbox length, target output RPM, load torque estimate, duty cycle, and supply voltage range.
Is this suitable for repeat production across variants?
Yes. You can standardize the motor platform and expand variants mainly by ratio while controlling gearbox length buckets.
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