A high torque DC motor in the micro and small-motor class is almost always a gear motor: a brushed, brushless, or coreless DC motor whose several-thousand-rpm output is geared down through a planetary or worm stage so that stall torque climbs from tens of gram-centimeters to tens or hundreds of kilogram-centimeters.
A gear motor trades speed for torque. A bare 20mm brushed motor runs around 7,000–11,500 rpm with only 22–37 g·cm of output torque; add a 24:1 planetary stage and output drops to roughly 237 rpm while rated torque rises to 0.17 kg·cm.
With its ironless rotor and multi-stage planetary gearbox, this build delivers high torque in a small diameter with fast response, ideal for grippers, dosing pumps, and joints. See coreless DC motors. brushed DC motors brushless DC motors
A planetary gear motor shares the load across several planet gears, giving the highest rated torque.
A worm gear motor self-locks under load, so the 31mm high torque worm gear motor holds stall torque without power. Planetary vs spur vs worm gearboxes compares the three.
Work out the torque at the output shaft, including lever arm, screw pitch, or friction, before choosing a ratio.
Motor torque & speed specs: what to check walks through the numbers.
A high-ratio gear motor driving into an end-stop sees its full stall torque and stall current.
The gearbox and the driver both have to survive that stall event.
Brushed platforms are rated for intermittent duty near stall.
Continuous high-load running favors a brushless build instead.
Encoder integration is available on brushed, coreless, and BLDC high-torque builds.
See BLDC motors with encoder for feedback options.
Robot joints have their own sizing method.
It is covered in specifying a micro gear motor for a robot joint.
Arm joints, grippers, and AMR wheel drives that need torque density in a small envelope.
Learn MoreSelf-locking worm drives give lifts and tilts the holding force they need.
The gearbox holds the load without extra braking.
Learn MoreContinuous-duty BLDC gear motors serve feed and positioning axes.
They run steadily through long production cycles.
Learn MoreThese motors deliver high torque in a handheld body.
Compact size keeps the tool easy to carry and control.
Learn MoreDosing and positioning mechanisms hold load quietly.
Smooth, silent holding suits sensitive medical tasks.
Learn More
Send the torque and speed you need at the output shaft, the supply voltage, and the available diameter and length, and tell us whether the load must hold position without power. SLW Motor's engineers will confirm the frame, drive type, and ratio, then return a quotation with the full datasheet.
To start, contact SLW Motor with your requirements and our engineers will take it from there.
Torque, speed, voltage, power, gear ratio, and output shaft are configured per project, with housing and gear material in brass, stainless steel, powder-metallurgy alloys, or engineering plastics.
Encoder integration, PCB soldering, and wire harness assembly are handled in-house, and every batch passes incoming inspection, in-process testing, and final verification.
A high torque DC motor is a DC gear motor that converts high shaft speed into high output torque at low rpm.
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.
