PLX Series Planetary Reducer: Tapered Roller Bearing & Expansion Sleeve Integrated Solution
I. Product Overview
Weigao PLX Series Planetary Reducers, covering models PLX42, PLX240, PLX280, and PLX330, are full-range precision transmission devices integrating double-row tapered roller bearings and expansion sleeve integrated connection technology. Tailored for both light-load precision scenarios and ultra-heavy-load industrial fields such as micro-servo modules, heavy-duty rolling mills, and large-scale hoisting equipment, this series overcomes the shortcomings of traditional reducers such as poor radial load capacity, difficult disassembly, and mismatched protection levels in cross-scenario applications. Compliant with ISO 6336 gear standards and AGMA 6123 certification, with IP65 to IP67 graded protection, it features precision ground gear sets, high-strength aluminum alloy (small model) and nodular cast iron (large models) housing, and adaptive lubrication system. Boasting advantages of strong radial load bearing, quick assembly-disassembly, graded environment adaptation, and wide torque coverage, it operates stably at -40℃ to +100℃, serving as a core component for cross-scenario industrial equipment worldwide.
II. Core Advantages
1. Double-Row Tapered Roller Bearings, Strong Radial Load Capacity
Adopting double-row tapered roller bearings at the input/output ends, the PLX series achieves superior radial and axial load bearing capacity compared with traditional angular contact bearings. Gears adopt precision involute tooth profile with high重合度修形, made of 20CrNiMo alloy steel (large models) and 40Cr alloy steel (PLX42) undergoing deep carburizing, quenching, and precision grinding to ISO 5-level accuracy (GB/T 1095.1-2008 equivalent). Tooth surface hardness reaches HRC 62-64, roughness ≤Ra 0.03μm, with tooth profile tolerance (f) ≤0.008mm and cumulative pitch error (F) ≤0.020mm. The double-row tapered roller bearings enhance radial load capacity by 40% and axial load capacity by 50%, effectively compensating for shaft deformation in heavy-load operation. Backlash is controlled within ≤2arcmin (PLX42) and ≤5arcmin (large models, optional ≤2.5arcmin), single-stage efficiency hits 96%-98.5%, speed ratio 3:1-100:1 (multi-stage extendable to 3200:1), torque density reaches 19Nm/cm³ for large models.
2. Expansion Sleeve Integrated Connection, Quick Assembly-Disassembly
The series adopts expansion sleeve connection (KE series standard) to replace traditional spline or keyway connection, realizing quick assembly and disassembly without damaging the main shaft. PLX42-PLX330 form a segmented product matrix: PLX42 (high-strength aluminum alloy housing) covers 0.12kW-5.5kW power and 80Nm-350Nm torque for micro-precision load; PLX240-PLX330 (nodular cast iron housing) cover 75kW-220kW power and 40000Nm-85000Nm torque for ultra-heavy-load scenarios. The expansion sleeve provides uniform radial clamping force, with clamping range 0.02-0.05mm and radial runout ≤0.012mm, avoiding local stress concentration. Housing structure optimized via finite element simulation enhances integral rigidity, resisting 2.2 times rated load impact, and the expansion sleeve design shortens maintenance disassembly time by 60% compared with spline connection.
3. Enhanced Sealing Protection, Harsh Environment Adaptation
Integrated graded protection design adapts to diverse working environments. PLX42 adopts IP65 protection (double-lip fluorine rubber oil seal + labyrinth structure) for precision workshops, with hard anodized anti-corrosion treatment (salt spray resistance ≥800 hours). PLX240-PLX330 upgrade to IP67 protection, adding stainless steel dust-proof cover and pressure-resistant sealing ring to resist heavy rain, dust, and coolant intrusion, with electrophoretic anti-corrosion treatment (C4 grade) for coastal and metallurgical environments. Cooling fins of large models adopt variable-pitch design, heat dissipation efficiency enhanced by 30%, and low-temperature resistant lubrication matching enables stable operation at -40℃ to +100℃. Operating noise ≤52dB (PLX42) and ≤58dB (large models) at 1m, service life extended to over 40000 hours (PLX42) and 45000 hours (large models) under normal conditions.
4. Adaptive Lubrication System, Cross-Scenario Compatibility
The lubrication system adopts adaptive configuration for different load scenarios: PLX42 uses fully synthetic PAO-based grease for lifelong lubrication, avoiding oil leakage in micro-equipment; PLX240-PLX330 adopt ISO VG 220 extreme pressure gear oil with forced circulation lubrication, equipped with oil cooler and online quality sensor for real-time monitoring. The sealed structure ensures lubrication stability, with the grease service life of PLX42 reaching the whole equipment life cycle, and the oil change cycle of large models extended to 12000 hours under continuous heavy load. Modular design allows quick replacement of expansion sleeves and bearings, with standardized accessories ensuring consistent clamping force and precision after overhaul.
III. Typical Application Fields
- Micro-Servo Equipment: Precision robotic arms, micro-linear modules, PLX42 with lifelong lubrication and low noise meeting workshop requirements
- Heavy-Duty Metallurgy: Steel rolling mills, billet conveyors, large models with IP67 protection and strong load bearing adapting to high-temperature dusty environments
- Large-Scale Hoisting: Port cranes, offshore hoisting equipment, expansion sleeve connection facilitating maintenance and corrosion protection adapting to marine environment
- New Energy: Wind power test platforms, large battery module presses, wide temperature adaptation and stable torque transmission ensuring test accuracy
- Precision Manufacturing: Semiconductor micro-motion platforms, medical imaging equipment, PLX42 with low backlash and compact structure matching precision installation
IV. Key Technical Parameters
| Model | Expansion Sleeve Specification (KE Series) | Rated Torque | Backlash | Protection Grade |
|---|
| PLX42 | KE15×30 | 80Nm-350Nm | ≤2arcmin | IP65 |
| PLX240 | KE80×120 | 40000Nm-60000Nm | ≤5arcmin (Optional ≤2.5arcmin) | IP67 |
| PLX280 | KE100×150 | 61000Nm-72000Nm | ≤5arcmin (Optional ≤2.5arcmin) | IP67 |
| PLX330 | KE120×180 | 73000Nm-85000Nm | ≤5arcmin (Optional ≤2.5arcmin) | IP67 |
V. Installation & Maintenance
Select models based on rated torque, expansion sleeve specification, and working environment (refer to the specification table). Ensure expansion sleeve and main shaft fit gap meets 0.02-0.05mm during installation, fasten bolts with specified torque (15-30N·m for PLX42, 200-350N·m for PLX240-PLX330) in diagonal sequence. PLX42 requires no oil change; large models use ISO VG 220 gear oil, replace every 12000 hours. Regularly inspect sealing performance and expansion sleeve tightness, calibrate backlash every 12 months for large models. Avoid overload operation exceeding 2.2 times rated torque, and entrust maintenance to professional technicians.
Weigao PLX Series adheres to the philosophy of "cross-scenario adaptation, rigid stability, and efficient maintenance". Its double-row tapered roller bearing and expansion sleeve connection break through traditional reducers' load and maintenance limitations, ensuring reliable operation in both micro-precision and ultra-heavy-load scenarios. Backed by strict quality control and professional after-sales service, it provides high-performance solutions for metallurgy, hoisting, and precision manufacturing, establishing itself as a trusted global partner in full-range planetary transmission.
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