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Worm Gear Motors

SLW builds worm gear motors — DC worm gear motors, brushless, coreless, and stepper variants from 8mm to 58mm — by matching a worm gearbox to the drive type your project already runs on.

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Specifications

Worm Gear Motor Configurations

The table below lists our standard worm gear motor platforms, covering drive type, frame size, rated voltage, gear ratios, and rated output for quick engineering comparison.

ModelDrive TypeFrameRated Voltage (applied range)RatiosOutput (rated)
8mm stepper motor + worm gearboxStepper8mmLow-voltage stepper drive42:1–230:11.5–150 rpm at 500 pps, step angle down to 0.078°, pull-in torque 249–1,056 g·cm
12mm brushed DC motor + 90° worm gearboxBrushed DC12mm12V (6–24V)18:1–244:1+66–900 rpm, 16–220 g·cm rated, up to 1,493 g·cm stall
12mm coreless motor + worm gearbox (1220 / 1221)Brushed coreless12mm12V (3–12V)18:1–244:1+Same ratio ladder as above with a low-inertia coreless rotor
15mm stepper motor + worm gearboxStepper15mmLow-voltage stepper drive42:1–230:11.5–150 rpm at 500 pps, pull-in torque up to 2,240 g·cm
25mm 370 brushed motor + worm gearboxBrushed DC25mm24V (6–24V)32.5:1–77.7:1+62–145 rpm, 1–3 kg·cm rated, 3.5–7.5 kg·cm stall
25mm brushed motor, dual-shaft worm gearboxBrushed DC25mm12V32.5:1–77.7:1+88–180 rpm, 1–3 kg·cm rated, two-directional output shaft
31mm high-torque brushed motor + worm gearboxBrushed DC31mm24V (6–24V)15.5:1–896:12–10 kg·cm rated at 101–410 rpm; stall torque up to 300 kg·cm at the highest ratios
36mm 555 brushed motor + worm gearboxBrushed DC36mm24V (6–24V)15.5:1–62:1+116–502 rpm, 2.5–20 kg·cm rated, 29.6W
36mm BLDC motor + worm gearboxBrushless DC36mm12V (6–24V)15.5:1–62:1+105–432 rpm, 2.5–20 kg·cm rated, 25.6W
58mm BLDC motor + 90° worm gearboxBrushless DC58mm12V (6–48V)15.5:1–62:1+105–432 rpm, 2.5–20 kg·cm rated, 90° output
18mm worm gearbox reducer (no motor)Gearbox only18×12×10mm—42:1–2025:1300–400 g·cm rated, single or dual output shaft
24mm worm gearbox reducer (no motor)Gearbox only24×12×9mm—26:1–1000:1200–500 g·cm rated

Figures are datasheet values at the listed rated voltage; custom ratios, voltages, and shafts are quoted on request. The 31mm and 36mm builds also appear in the high torque DC motors range, and every 90° unit in the right angle gear motors range.

Advantages

Why Choose an SLW Worm Gear Motor

  • Right-angle (90°) output

    The worm stage is the most compact way to build a right angle gear motor, fitting enclosures where a straight-through drive would need more room.

  • Self-locking under normal loads

    The worm gear motor holds position under normal loads without needing a separate brake.

  • Compact housing

    One gearbox stage replaces a longer parallel-shaft reduction, keeping the worm gear motor housing compact.

  • Value-added integration

    Encoders, PCB soldering, and wire harness assembly can be built onto the assembly, adding value to the worm gear motor.

  • OEM/ODM customization

    Voltage, shaft, and housing material stay open to change, so the worm gear motor can be tailored to your design.

Drive Types

Configure by Drive Type

Choose brushed DC for the lowest-cost entry point, coreless for faster response, brushless for longer life, stepper for positioning, or a standalone gearbox.

  • Brushed DC Drives

    Pick a voltage, ratio, and shaft length; 12mm to 36mm frames scale the same 90° worm gear motor layout.

  • Coreless Drives

    A coreless rotor cuts inertia for faster start/stop response and finer low-speed control in a 12mm frame.

  • Brushless (BLDC) Drives

    Brushless drives trade brush wear for longer service life and steadier torque across higher duty cycles.

  • Stepper Drives

    Stepper drives add open-loop positioning to a self-locking output, pairing a stepper with a worm gearbox.

  • Gearbox-Only (No Motor)

    Standalone worm gearbox reducers ship for pairing with your own motor, alongside spur or planetary equivalents.

More configurations in this category include the 25mm dual-shaft, the 12mm coreless parallel-shaft, and the 12mm M4 screw-shaft worm gear motor with encoder. brushed DC motors coreless DC motors brushless DC motors stepper gear motors Mini Gearbox

Custom build

Customization Options

Tailor a worm gear motor to your control electronics, mounting, and environment, then request a custom worm gear motor quote when a standard build will not do.

  • Voltage

    Winding and voltage are matched to your control electronics so the motor runs correctly on your existing drive.

  • Shaft

    Choose a single or dual output shaft, custom length, flats, or a screw-drive end to suit your mechanism.

  • Material

    Housings and gearing can use brass, stainless steel, powder-metallurgy alloys, or engineering plastics.

  • Cable & Connector

    PTFE or PVC leads are available with application-specific connectors to match your installation.

  • Encoder Integration

    An integrated encoder supports closed-loop position or speed feedback in your control system.

  • Quiet & Long Life

    Quiet-running, long-life versions suit enclosed or wearable equipment where noise and wear matter.

Need a non-standard ratio, shaft, or voltage? Request a custom worm gear motor quote and we will match a worm gear motor to your application.

Quality

Quality & Sourcing

Every build runs through incoming inspection, in-process testing, and final verification for dimensional and performance consistency, so each worm gear motor meets the same standard.

  • Incoming Inspection: Checks at the start of every build
  • In-Process Testing: Monitored throughout manufacturing
  • Final Verification: Dimensional and performance consistency
  • Certified: ISO 9001:2015 certified and RoHS compliant
  • OEM/ODM Process: Same process for sample and bulk orders
Applications

Worm Gear Motor Applications

Robotics & Automation

A worm gear motor suits applications where right-angle output and self-locking are useful, including robotics and automation systems. Our worm gear motor pros and cons guide explains the trade-offs, while worm gear motor self-locking and holding force covers holding-force considerations.

The right-angle output and self-locking behavior suit robotic and automation assemblies that need compact, controlled motion.

Explore Robotics & Automation Applications
Medical Equipment

Adjustable medical positioning fixtures can use a worm gear motor to hold position without continuous power, as in medical equipment designs.

Self-locking output keeps fixtures steady once positioned, so the drive does not need power to stay put.

Explore Medical Equipment Applications
Surveillance & Access Control

Access control hardware and surveillance systems can use worm gear motors for right-angle, self-locking output.

Holding position without continuous power makes the worm drive a potential fit for access and surveillance equipment.

Explore Surveillance & Access Control Applications
Industrial & Lifting

Worm-driven assemblies are used in industrial machinery and lifting and material handling equipment.

Worm reduction trades speed and efficiency for self-locking, right-angle output. See how the options compare in this guide to compact worm, spur, and planetary drivetrains.

Explore Industrial Machinery Applications
Quote

Get a Custom Worm Gear Motor Quote

SLW Motor engineers worm gear motors as OEM/ODM assemblies, from prototype through flexible sample customization and stable bulk delivery, across brushed, brushless, coreless, and stepper drives.

To move forward, get a custom worm gear motor quote and share your ratio, voltage, and shaft requirements with our team.

Alternatives

Explore Other Drivetrains

Planetary Gear Motor

A planetary gear motor is the straight-through alternative when your build doesn't need to hold position without power.

It replaces a worm stage with a compact, in-line drivetrain for builds that don't need self-locking.

Spur Gear Motor

A spur gear motor is the other straight-through alternative to a worm stage for builds without holding needs.

Choose it when you want a simple, in-line drivetrain instead of a self-locking worm stage.

Ready-Made Option

The 12mm Brushed Coreless Motor with Planetary Gearbox suits compact, budget-sensitive builds.

It pairs a brushed coreless motor with a planetary gearbox for a ready-made, straight-through drivetrain.

Higher-Duty Option

The 16mm brushless coreless motor with planetary gearbox is built for higher-duty-cycle runs.

It pairs a brushless coreless motor with a planetary gearbox for longer, more demanding duty cycles.

FAQ

FAQ

Answers on MOQ, lead times, samples, encoder integration, and tooling for a custom worm gear motor.

What's the MOQ for a custom worm gear motor?
MOQ varies by drive type, ratio, and customization level; SLW supports both small-batch sample runs and stable bulk orders once a specification is set.
What are typical lead times for samples vs. bulk orders?
Lead time depends on ratio, drive type, and how much customization is involved, rather than a fixed number of days across the whole line.
Do you charge for samples?
Sample cost depends on configuration and customization level rather than a flat fee, since a bare gearbox and a fully integrated assembly aren't priced the same way.
Can you add an encoder to a worm gear motor?
Yes — encoder integration can be built onto the worm gear motor assembly alongside PCB soldering and wire harness assembly, shipping as one unit.
Is tooling required for a custom shaft or housing?
Minor shaft or housing changes often reuse existing tooling; larger deviations from current designs may require new tooling, sized to the specific modification.
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