BLDC Planetary Gear Motor Supplier: Specifications, Applications & Buying Guide

If you are developing a product that needs high torque in a compact form factor — an AGV drive wheel, a robotic arm joint, an automatic door operator — a BLDC motor paired with a planetary gearbox is likely on your BOM. This guide covers the specifications, typical applications, realistic pricing, and what to evaluate when choosing a BLDC planetary gear motor supplier.

Why Planetary Gearboxes for BLDC Motors?

A BLDC motor produces relatively low torque at high speed. Most applications need the opposite: high torque at low speed. A gearbox bridges this gap. Among gearbox types, planetary gearboxes offer distinct advantages:

• High torque density: 3-4 planet gears share the load simultaneously, enabling higher torque from a smaller package than spur or worm gearboxes.
• High efficiency: 90-97% per stage, compared to 40-70% for worm gearboxes. This matters in battery-powered applications where every watt counts.
• Compact inline profile: Motor and output shaft are coaxial — no right-angle offset. The assembly fits in tight spaces like AGV wheel modules.
• Low noise: Internal meshing of planet gears with the ring gear produces less noise than external gear meshing. Typical: 55-65 dB.
• Bidirectional operation: Unlike worm gearboxes, planetary gears do not self-lock — the output shaft can freely back-drive the motor, which is useful for applications requiring both drive directions.

For a detailed comparison of planetary vs worm vs spur gearboxes, see our planetary gearbox selection guide.

BLDC Planetary Gear Motor Specifications by Frame Size

The table below shows typical specifications across common frame sizes. These represent our standard product range — most manufacturers in China's Yangtze River Delta region offer similar configurations.

* Prices at MOQ 50-100 units, FOB Ningbo/Shanghai, motor + planetary gearbox assembly. Controller and brake are additional.

Key Applications

1. AGVs and Mobile Robots

BLDC planetary gear motors are the standard drive solution for automated guided vehicles (AGVs) and autonomous mobile robots (AMRs). The compact inline profile fits inside wheel modules, and the high efficiency extends battery runtime. Typical configurations:

• Goods-to-person robots (50-300 kg): Dual 60mm, 100-200W motors with 15:1-25:1 planetary gear. Travel speed 1.0-1.5 m/s.
• Pallet truck AGVs (1-2 ton): Dual 80mm, 400W motors with 30:1 planetary gear. Travel speed 0.5-1.0 m/s.
• Heavy-duty AGVs (5-20 ton): Dual 90mm, 750W motors or switch to L-type worm gear motors for self-locking capability on inclines.

For detailed AGV motor sizing calculations, see our AGV motor sizing guide.

2. Conveyor and Material Handling

Belt conveyors, roller conveyors and sorting systems use BLDC planetary gear motors for variable-speed control with high efficiency. Key advantage over AC gear motors: stepless speed adjustment via the controller, no need for VFD. Common setup: 60-80mm motors, 200-400W, with 7:1-20:1 planetary gear driving conveyor rollers at 30-200 RPM.

See our conveyor belt motor selection guide for sizing formulas.

3. Automatic Doors and Gate Operators

Sliding doors, swing doors and barrier gates require quiet, reliable motors with precise position control. BLDC planetary gear motors provide smooth operation with low noise (< 60 dB) and long life (> 20,000 hours). Typical: 42-60mm frame, 30-100W, with 15:1-50:1 planetary gear. An electromagnetic brake is added for safety (holding the door position during power failure).

4. Medical and Laboratory Equipment

Infusion pumps, patient bed actuators, X-ray positioning systems and laboratory automation require precise, quiet, long-life motors. BLDC planetary gear motors meet these needs with low electrical noise (EMI), smooth torque delivery through FOC control, and consistent performance over years of operation. Medical applications typically specify low-backlash (< 5 arcmin) planetary gears and motors with medical-grade certifications.

5. Solar Tracking Systems

Single-axis and dual-axis solar trackers use BLDC planetary gear motors to orient PV panels toward the sun. Requirements: IP65 protection for outdoor installation, wide temperature range (-40 to +60C), very low speed (< 5 RPM output), and high reliability with minimal maintenance. Typical: 42-60mm motor, 15-60W, with 50:1-100:1 planetary gear delivering 0.5-3 RPM to the tracking mechanism.

How to Evaluate a BLDC Planetary Gear Motor Supplier

Not all motor suppliers are equal. Here is what separates a reliable manufacturer from a trading company or assembler:

1. In-House Manufacturing vs Assembly

A true manufacturer winds stators, magnetizes rotors, presses bearings, and assembles complete motors in-house. An assembler or trading company buys motors from one source and gearboxes from another, then pairs them. The difference matters for quality consistency — when the motor and gearbox come from the same factory, tolerances are matched and the complete unit is tested as an assembly.

How to verify: Ask for factory photos or a virtual tour. A real motor manufacturer will have winding machines, magnetization equipment, dynamic balancing machines, and a testing station with a dynamometer. We build both motors and gearbox assemblies at our Ningbo facility — learn about our manufacturing capabilities.

2. Testing and Quality Control

Every motor-gearbox assembly should be tested before shipment. Key test parameters:

• Output torque and speed — verified against specification at rated voltage and load.
• Current draw — ensures the motor is within rated current under load.
• Noise level — measured at rated speed, typically < 65 dB for planetary gear motors.
• Backlash — measured in arcminutes, critical for positioning applications.
• Insulation resistance — minimum 100 M-ohm at 500V DC (motor winding to housing).
• Hi-pot test — 1,500V AC for 1 second between winding and housing.

Ask for sample test reports before placing an order. A quality supplier provides test data with every shipment, not just upon request.

3. Customization Capability

Standard catalog motors rarely fit perfectly. Typical customizations you should expect a good supplier to handle:

• Zero-cost changes: Wire length and color, connector type, shaft length, winding voltage (12V/24V/48V).
• Low-cost changes ($500-2,000 tooling): Custom mounting flange, modified output shaft (diameter, keyway, flat), different IP rating.
• Major changes ($3,000-10,000 NRE): Custom gear ratio not in standard series, new housing design, integrated controller inside the motor.

For more detail on the custom development process, see our OEM development guide.

4. MOQ and Lead Time

Realistic expectations for Chinese BLDC planetary gear motor manufacturers:

• Samples (1-5 pcs): 1-2 weeks for standard products, 3-4 weeks for modified specifications.
• First production order (MOQ 50-100 pcs): 3-4 weeks after sample approval.
• Repeat orders (100-500 pcs): 2-3 weeks.
• Volume orders (1,000+ pcs): 4-6 weeks, depending on material procurement.

5. Certifications

Minimum: ISO 9001 quality management system. For export: CE (LVD + EMC) for Europe, UL or cUL for North America, RoHS compliance for environmental regulations. Medical applications require ISO 13485 or FDA registration. Our motors carry ISO 9001, CE/LVD and RoHS certifications — see our certifications page.

Pricing Factors and How to Optimize Cost

BLDC planetary gear motor pricing depends on six main factors:

For a complete price breakdown by power rating including gearbox, controller and brake costs, see our BLDC motor price guide.

Why Source from Ningbo, China?

Ningbo and the surrounding Yangtze River Delta region is the global manufacturing center for small and medium BLDC motors. Advantages of sourcing from this region:

• Complete supply chain: NdFeB magnet suppliers, silicon steel sheet mills, bearing manufacturers, connector makers — all within 200 km. This keeps costs low and lead times short.
• Port access: Ningbo-Zhoushan Port is the world's busiest port by cargo tonnage. FOB Ningbo terms mean direct container loading with no inland transport costs.
• Skilled workforce: Decades of motor manufacturing experience in this region. Engineers understand BLDC motor design, not just assembly.
• Competitive pricing: Direct manufacturer pricing without trading company markup. Our China motor import guide covers what to expect.

Our BLDC Planetary Gear Motor Range

Shenghe Zhilian (SHZL Drive) manufactures BLDC motors from 15W to 3,000W with integrated planetary gearboxes in ratios from 3:1 to 100:1. We offer:

• Standard products: Planetary gear motor series in 42mm, 60mm, 80mm and 90mm frame sizes. Ship in 1-2 weeks.
• Complete drive systems: Motor + planetary gearbox + FOC controller + electromagnetic brake + encoder. Pre-tested as a unit.
• Custom configurations: Modified shafts, flanges, voltage, gear ratios, IP ratings. Prototype in 3-4 weeks.
• Engineering support: We help you select the right motor and gear ratio for your application. Share your requirements and receive a recommendation within 24 hours.

Based in Ningbo, Zhejiang, with 15+ years of BLDC motor manufacturing experience and 50+ OEM equipment partners worldwide. ISO 9001 certified, CE and RoHS compliant.

Frequently Asked Questions