28mm Brushed Planetary Gear Motor 24V 12rpm with Encoder Low Speed High Torque 3Nm Low Noise 800H Lifetime for Robots

The MS-28PG385 series is a 28mm diameter brushless planetary gear motor built for equipment that must run continuously, quietly, and without maintenance. A three-phase BLDC motor with a built-in driver is coupled to a multi-stage planetary gearbox, converting a 12V or 24V DC input into controlled output speeds from 5rpm up to 1000rpm, with rated torque up to 2.9kg.cm and a minimum working life of 20,000 hours. Hall sensor commutation and FG speed feedback give the control board real closed-loop regulation, while over-current, over-voltage and under-voltage protection keep the drive safe during stall and start-up conditions. The result is a compact, low-EMI drive platform that suits robot vacuum wheel modules, smart lock actuators, medical devices, personal care appliances and 5G communication equipment.

• Brushless Long Life: Three-phase BLDC motor with no brushes to wear out, rated for a minimum of 20,000 working hours.
• High Torque in 28mm: Multi-stage planetary gearing multiplies motor torque up to 2.9kg.cm inside a 28mm diameter housing.
• Built-in Driver Board: Integrated controller reduces external components and simplifies wiring for compact assemblies.
• Closed-loop Speed Control: Hall sensor commutation with FG speed feedback supports PWM speed regulation across the full range.
• Low Noise, Low EMI: Precision planetary stages and EMC-conscious driver design keep acoustic noise and interference low.
• Three-layer Protection: Over-current, over-voltage and under-voltage cut-off protect the motor during stall, ramp-up and low-battery conditions.
• Wide Speed Window: Output from 5rpm to 1000rpm available by ratio selection, with reversible CW and CCW rotation.
• High Efficiency: 58% to 90% transmission efficiency keeps battery-powered products running longer per charge.
• Flexible Shaft Options: 6mm and 8mm shafts in flat, D-cut, round or double D-cut configurations.

Final output speed and torque depend on the selected planetary ratio. Send your required output speed and load torque and a matching ratio will be recommended.

The 28mm brushless planetary platform is specified across applications where space is tight, duty cycles are long, and maintenance access is impossible: robot vacuum cleaner wheel and brush drives, smart door locks and access control actuators, medical and healthcare equipment, personal care and beauty instruments, 5G communication equipment, automotive sub-assemblies, power tools, fitness equipment, security monitoring hardware and small home appliances.

• Voltage: 6V, 12V and 24V windings to match your supply rail.
• Speed and Torque: ratio selection from 5rpm to 1000rpm output, with torque matched to your load profile.
• Shaft: 6mm or 8mm diameter, flat, D-cut, round or double D-cut, custom length on request.
• Gear Material: metal, hardened steel, plastic or powder metallurgy depending on duty cycle and noise targets.
• Electronics: cable length, connector type, capacitors and EMC components to suit your PCB layout.
• Branding: customer logo marking and custom packaging for OEM programs.

Motors are produced in facilities certified to ISO9001, IATF16949, CE, RoHS and REACH. Each batch is inspected for no-load current, no-load speed, load speed, rated current, stall torque, noise and appearance before shipment. Test reports and material declarations can be issued together with the shipping documents for customs clearance and end-customer audits.