Weigao Planetary Gear Units: Precision Meshing & Modular Combination Solution
I. Product Overview
Weigao Planetary Gear Units are high-precision power transmission devices integrating integrated sun gear-planet carrier drive and micro tooth profile modification technology. Covering single-stage, two-stage and three-stage product series, this line is tailored for high-demand scenarios such as servo control systems, new energy test platforms, and precision automation equipment. It overcomes the shortcomings of traditional planetary reducers such as poor rigidity, large backlash, and limited combination flexibility. Compliant with GB/T 30555-2014 and ISO 6336 standards, with IP65/IP67 graded protection, it features 20CrNiMo alloy steel gears, aluminum alloy/cast iron composite housing, and lifelong lubrication system. Boasting advantages of high transmission efficiency, ultra-low backlash, compact structure, and flexible combination, it operates stably at -25℃ to +100℃, serving as a core component for high-end precision transmission worldwide.
II. Core Advantages
1. Integrated Planetary Drive, High Efficiency & Rigidity
Adopting integrated sun gear-planet carrier transmission structure, the gear units realize power分流 through multi-tooth simultaneous meshing, mimicking the stable operation of the solar system. Gears undergo carburizing quenching, five-axis precision grinding, and micro tooth profile modification (tooth top thinning 0.02mm), with tooth surface hardness up to HRC 60-64 and roughness ≤Ra 0.03μm. Single-stage transmission efficiency reaches 97%-98.5%, two-stage efficiency 95%-97%, and three-stage efficiency 93%-95%, with torque density up to 19Nm/cm³. Backlash is controlled within ≤1arcmin (precision grade) and ≤3arcmin (standard grade), far lower than industry average levels. The integrated planet carrier design enhances torsional rigidity by 25%, enabling the units to withstand 3 times rated load instantaneous impact, ensuring stable power output.
2. Multi-Series Modular Combination, Scenario-Specific Adaptation
The series adopts modular combination design, covering three product grades to match diverse needs. Single-stage models (ratio 3:1-12.5:1) cover power 0.12kW-75kW and rated torque 50Nm-8000Nm, suitable for high-speed precision scenarios. Two-stage models (ratio 15:1-156:1) cover power 0.37kW-90kW and torque 200Nm-15000Nm, for medium-speed heavy-load applications. Three-stage models (ratio 200:1-1953:1) cover power 0.55kW-110kW and torque 500Nm-22000Nm, for ultra-low-speed high-precision tasks. It supports flexible combination with R/S/F/K series reducers, and offers foot-mounted, flange-mounted, and motor-direct-connected modes. The compact in-mesh structure reduces volume by 30%-50% compared with parallel shaft reducers, saving installation space significantly.
3. Graded Sealing Protection, Stable NVH Performance
Graded protection design adapts to complex working environments. Standard models adopt IP65 protection (double-lip fluorine rubber oil seal + labyrinth structure) to resist dust and light coolant intrusion. Enhanced models upgrade to IP67 with stainless steel pressure-resistant cover, suitable for humid and dusty industrial sites. The optimized tooth profile and balanced planet distribution minimize vibration, with operating noise ≤55dB (single-stage) and ≤58dB (multi-stage) at 1m, meeting precision workshop standards. The gears use wear-resistant alloy steel with surface nitriding treatment, extending service life to over 48000 hours. Low-temperature resistant lubrication ensures stable operation at -25℃ to +100℃, adapting to extreme working conditions.
4. Lifelong Lubrication System, Low Maintenance Cost
The lubrication system adopts fully synthetic PAO-based grease for lifelong lubrication, avoiding frequent oil changes. Small-power models realize maintenance-free operation throughout their service life, while large-power multi-stage models are equipped with oil sight glass and pressure relief valve for easy status monitoring. The grease has excellent anti-oxidation and anti-wear performance, reducing churning loss by 12% compared with conventional lubricants. The modular structure allows quick disassembly of gear sets and bearings, with standardized accessories ensuring consistent backlash and efficiency after overhaul. Maintenance time is reduced by 40% compared with traditional planetary reducers, lowering overall operation costs.
III. Typical Application Fields
- Servo Control: CNC machine tool feed axes, robotic arms, ultra-low backlash ensuring positioning accuracy
- New Energy: Electric vehicle powertrain test platforms, battery module presses, high efficiency matching test demands
- Precision Automation: Linear modules, electronic component assembly lines, compact structure saving installation space
- Metallurgy Precision: Non-ferrous metal rolling mills, thin-sheet processing equipment, high rigidity resisting load impact
- Medical Equipment: Precision imaging devices, surgical robot accessories, low noise adapting to clean room requirements
IV. Key Technical Parameters
| Model Series | Transmission Ratio Range | Rated Torque | Lubrication Mode | Protection Grade |
| Single-Stage | 3:1-12.5:1 | 50Nm-8000Nm | Lifelong Grease | IP65 (Optional IP67) |
| Two-Stage | 15:1-156:1 | 200Nm-15000Nm | Lifelong Grease/Oil Bath | IP65 (Optional IP67) |
| Three-Stage | 200:1-1953:1 | 500Nm-22000Nm | Oil Bath | IP65 (Optional IP67) |
V. Installation & Maintenance
Select models based on transmission ratio, torque demand, and working environment (refer to the specification table). Ensure coaxiality error ≤0.015mm during installation, fasten bolts with specified torque (30-80N·m for single-stage, 70-140N·m for multi-stage) in diagonal sequence. Avoid installation tilt angle exceeding 10° for horizontal mounting to ensure lubrication uniformity. Regularly inspect sealing performance and gear operation status, calibrate backlash every 12 months for precision-grade models. Avoid overload operation exceeding 3 times rated torque, and entrust complex maintenance to professional technicians.
Weigao Planetary Gear Units adhere to the philosophy of "precision-driven, efficient integration, and reliable durability". Its integrated planetary drive and micro tooth profile modification break through traditional reducers' precision and efficiency limitations, ensuring stable operation in high-end precision scenarios. Backed by strict quality control and professional after-sales service, it provides high-performance transmission solutions for servo control, new energy, and medical industries, establishing itself as a trusted global partner in high-precision planetary transmission.
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