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42mm Diameter Brushless DC Motor With Planetary Gearbox

The 42mm configuration combines a 44.2W power platform with multiple reduction options for higher-load applications, with stall-current demand considered during driver selection.

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42mm brushless DC planetary gear motor for 6-48V systems
Specs

Key Features

This model is a 42mm planetary BLDC gear motor built around a high-torque ratio ladder and discrete gearbox-length buckets, making selection straightforward when you need large torque growth without changing the motor platform.

  • 6V–48V applied range supports broad system voltage architectures
  • Planetary gearbox ratio ladder (3.7 to 721) provides step-by-step output tuning from higher-speed motion to high-torque holding
  • Power is listed as 44.2W across the provided configurations, keeping performance planning consistent while ratios change
  • Gearbox length buckets (34.5 / 44.8 / 54.9 / 65.2 mm) support enclosure-controlled designs that must reuse mounts
  • Rated load current is listed as 2.3A across the table, helping driver sizing stay consistent while torque scales with ratio
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)

3.7

24

2162

0.6

1720

2.3

2

44.2

7

8.5

34.5

5.2

24

1538

0.6

1230

2.3

2.5

44.2

9.5

8.5

14

24

571

0.6

455

2.3

7

44.2

20

8.5

44.8

19

24

421

0.6

330

2.3

9.5

44.2

28

8.5

27

24

296

0.6

235

2.3

13.5

44.2

40

8.5

50

24

160

0.6

125

2.3

25

44.2

65

8.5

54.9

71

24

112

0.6

90

2.3

40

44.2

90

8.5

100

24

80

0.6

64

2.3

50

44.2

130

8.5

139

24

57

0.6

45

2.3

60

44.2

170

8.5

189

24

42

0.6

33

2.3

65

44.2

190

8.5

65.2

264

24

30

0.6

24

2.3

100

44.2

260

8.5

369

24

21

0.6

17

2.3

120

44.2

380

8.5

516

24

15.5

0.6

12

2.3

150

44.2

500

8.5

721

24

11

0.6

8.8

2.3

150

44.2

500

8.5

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 and lower torque to very low speed and high torque, so you can pick a ratio based on output behavior rather than trial-and-error tuning.

  • Gearbox Length Buckets That Protect Your Enclosure Design

    Ratios group into a small set of gearbox lengths (34.5 / 44.8 / 54.9 / 65.2 mm). That helps you keep the same housing and mounts while expanding variants by ratio.

  • Consistent Power Planning Across Ratios

    Power stays listed at 44.2W in the provided configurations, which helps keep system expectations stable while you switch ratios for different loads.

  • Driver Sizing Becomes More Predictable

    Rated-load current is listed consistently at 2.3A, so you can keep driver sizing stable while you use ratio changes to solve mechanical output needs.

Custom

Beyond the Standard: Performance Customized

  • 01
    44.2W Power-Line Planning for Load Reality
    We anchor selection to the 44.2W line first, then choose a ratio step that hits your working RPM without assuming unlimited torque growth at low speed.
  • 02
    8.5A Stall-Current Containment Strategy
    We define how you handle stall events before finalizing ratios, because stall current is 8.5A across the table and will drive current limit, wiring, and protection logic.
  • 03
    Gearbox-Length Jump Points That Change Packaging Risk
    We lock your allowable gearbox-length bucket first (34.5 / 44.8 / 54.9 / 65.2 mm), then shortlist ratios that stay inside it so the enclosure does not change late in the project.
  • 04
    Ratio-Step Mapping for “Feel” Under Rated Load
    We map your target RPM to the rated-load speed column first, then validate rated torque so the mechanism holds the motion feel you want under real load.
  • 05
    Multi-Ratio SKU Strategy Under Fixed Current and Power Lines
    If you plan a product line, we group ratios by gearbox-length bucket and keep driver selection stable around the 2.3A rated-load line while you expand torque tiers by ratio.
  • 44.2W Power-Line Planning for Load Reality
  • 8.5A Stall-Current Containment Strategy
  • Gearbox-Length Jump Points That Change Packaging Risk
  • Ratio-Step Mapping for “Feel” Under Rated Load
  • Multi-Ratio SKU Strategy Under Fixed Current and Power 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 options list the shortest gearbox length bucket, so they suit 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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Tell us your project or application requirements, and our team will get back to you with technical support, product recommendations, or a customized motor solution.

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