HB-Series Industrial Gear Reducer (B4HH/H2DH/H3DH/H4DH/B2DH/B3DH): Wear-Resistant Impact-Resistant Grading, Empowering Diversified Heavy-Duty Operation
I. Product Overview: Graded Configuration Design, Meeting Core Heavy-Duty Transmission Needs
Weigao’s HB-Series Industrial Gear Reducer, covering updated core models B4HH, H2DH, H3DH, H4DH, B2DH and B3DH, is a high-reliability power transmission device specialized in core industrial scenarios requiring wear-resistant, impact-resistant and diversified heavy-duty operation. Based on an upgraded dual-series (DH/DH-B) graded configuration design platform, this series integrates advanced wear-resistant impact-resistant heavy-duty helical gear technology, adaptive structural design and flexible modular assembly technology, realizing an excellent balance of graded wear-resistant impact adaptation, high torque transmission, stable operation and diversified scenario compatibility. It effectively solves the pain points of traditional reducers such as poor wear resistance, weak impact bearing capacity, single scenario adaptation and difficult matching with complex heavy-duty equipment, and can maintain stable and reliable power output in working conditions involving heavy load, frequent impact, long-term friction, harsh dust and diversified layout requirements. With its wear-resistant impact-resistant graded configuration advantages and diversified adaptation performance, it has become a core transmission component in industries such as heavy mining excavation, large-scale construction machinery, port bulk handling, metallurgical auxiliary and large-scale waste treatment, providing high-stability power support for complex heavy-duty industrial production. As an upgraded heavy-duty transmission product of Weigao, this series has been exported to more than 80 countries and regions around the world, winning wide recognition from global customers with its wear-resistant impact reliability and diversified adaptation value.
II. Core Advantages: Six Core Strengths, Shaping Heavy-Duty Transmission Benchmarks
1. Graded Heavy-Duty Helical Transmission, Efficient & Stable
Adopting precision-ground wear-resistant impact-resistant heavy-duty helical gears with optimized tooth profile, high-strength modulus design, advanced tooth surface carburizing strengthening technology and wear-resistant ceramic coating treatment, the series achieves meshing accuracy up to GB/T 10095.2 Class 6 standard. The parallel-axis helical transmission structure with reinforced rib, thickened wall and impact buffer design ensures deep and uniform meshing between gears, reasonable force distribution and small impact shock, reducing transmission backlash to ≤3arcmin. The transmission efficiency reaches 94%-96% for single-stage transmission and 92%-95% for multi-stage transmission, effectively reducing energy loss in long-term friction and impact heavy-duty operation. The fully enclosed integral cast iron housing with integrated heat dissipation fins combines excellent structural rigidity, impact resistance and heat dissipation functions, with operating noise ≤75dB at 1m distance, ensuring stable operation even in high-friction, high-impact and dusty heavy-duty working environments.
2. Dual-Series Graded Configuration, Precise Heavy-Duty Adaptation
The six core models of the series are divided into DH and DH-B dual wear-resistant impact-resistant series with targeted graded configuration to meet differentiated complex heavy-duty transmission needs: DH-series models (H2DH, H3DH, H4DH) are wear-resistant enhanced heavy-duty models, integrating wear-resistant coating and impact buffer structure, suitable for high-friction continuous operation equipment such as large mining conveyors, construction machinery auxiliary systems and medium-sized port bulk hoists; among them, H2DH is small-medium torque wear-resistant model, H3DH/H4DH are large torque wear-resistant impact-resistant enhanced models. DH-B-series models (B2DH, B3DH, B4HH) are ultra-heavy load impact-resistant enhanced models with reinforced shaft, thickened gear and high-strength bearing design, ideal for ultra-high-impact heavy-duty equipment such as large-scale mining excavators, heavy port grab cranes, high-load construction machinery main transmission systems and metallurgical smelting auxiliary machinery. This dual wear-resistant impact-resistant series graded design ensures precise matching of different heavy load levels, friction intensity and impact frequency requirements, further improving equipment operation stability and service life in complex environments.
3. High Torque Bearing Capacity, Durable Heavy-Duty Operation
Gears and transmission shafts are made of high-strength 42CrMo alloy steel with wear-resistant strengthening treatment (DH-series) and 40CrNiMoA ultra-high-strength alloy steel with impact-resistant heat treatment (DH-B-series), processed through precision forging, carburizing, quenching, tempering, precision grinding and surface wear-resistant coating processes. The surface hardness reaches HRC 62-65, and the core hardness is HRC 35-38, ensuring excellent wear resistance, impact resistance, fatigue resistance and torque transmission stability. The optimized gear modulus, tooth width, shaft diameter and impact buffer structure design for each model ensures that the rated output torque of the series is precisely graded from 1000N·m to 32000N·m (H2DH: 1000-2500N·m; H3DH: 2500-9000N·m; H4DH: 9000-24000N·m; B2DH: 12000-22000N·m; B3DH: 22000-30000N·m; B4HH: 30000-32000N·m). The integral cast iron housing with high rigidity, thickened wall and impact absorption design ensures no deformation under ultra-heavy load and frequent impact, ensuring a service life of more than 15 years under normal maintenance in complex heavy-duty environments.
4. Modular Heavy-Duty Installation, Flexible Layout Adaptation
The series adopts an upgraded diversified heavy-duty modular design, supporting multiple installation modes such as base-mounted, flange-mounted (B5/B14), torque arm-mounted, shaft-mounted, flange-output mounted and mobile base-mounted, which can be flexibly selected according to the diversified layout requirements of complex heavy-duty industrial equipment. The output shaft is configured with ultra-heavy-duty wear-resistant reliable options such as extra-large-diameter solid shaft with flat key, high-strength spline solid shaft, extra-large-torque hollow shaft with locking disk and wear-resistant sleeve-equipped shaft, and can be precisely matched with motors with power ranging from 3kW to 280kW and reduction ratios of 5-400 (single-stage/multi-stage combination). The standardized ultra-heavy-duty interface design with reinforced connection parts and dust-proof protection facilitates quick installation and replacement in complex heavy-duty workshops and outdoor sites, reducing construction difficulty and time cost, and adapting to the layout needs of various complex core heavy-duty industrial equipment.
5. Enhanced Sealing & Heat Dissipation, Wide Heavy-Duty Environment Adaptability
Equipped with a five-layer enhanced wear-resistant sealing system composed of heavy-duty high-temperature resistant double-lip oil seal, labyrinth seal, high-elasticity O-ring, wear-resistant sealant and dust-proof cover with filter, the reducer achieves IP65 protection level (IP66 can be customized for extreme harsh environments). This sealing structure can effectively prevent the intrusion of dust, coal dust, gravel, water vapor and corrosive media in complex heavy-duty working environments, avoid oil leakage and internal component wear, and further enhance the wear-resistant protection of key parts. The optimized internal oil circuit design with multi-point lubrication, oil filter and large-area integrated heat dissipation fins on the housing ensures sufficient lubrication, impurity filtration and rapid heat dissipation of all transmission components during high-friction, high-impact and high-temperature operation, and the product can work normally in the operating temperature range of -25℃ to +120℃, adapting to most complex heavy-duty working conditions such as deep mining workshops, construction sites, port terminals, metallurgical smelting workshops and outdoor dusty heavy-duty sites.
6. Convenient Heavy-Duty Maintenance, Cost-Effective Operation
The modular and ultra-heavy-duty structural design with wear-resistant protection makes component disassembly and maintenance more convenient, and the high interchangeability of spare parts between the same series reduces maintenance difficulty and time cost in complex heavy-duty environments. The centralized and protected extra-large-diameter oil filling port, oil drainage port, high-temperature resistant explosion-proof transparent oil level observation window and built-in oil filter facilitate daily lubrication management, real-time oil level monitoring and impurity cleaning. It is recommended to use 320#/460#/680# wear-resistant impact-resistant ultra-heavy-duty industrial gear oil, which further enhances the wear resistance, impact resistance, load-bearing capacity and high-temperature resistance of internal components; the first oil change is after 800 hours of operation, and regular maintenance and oil change are performed every 4500 hours thereafter for high-friction and high-impact working conditions. The high reliability, long service life, ultra-strong wear-resistant impact-resistant capacity of the product effectively reduce the frequency of maintenance and replacement in complex heavy-duty environments, significantly lowering the total operation cost of customers.
III. Application Fields: Heavy-Duty Core Coverage, Boosting Industrial Production Efficiency
With its dual wear-resistant impact-resistant series graded configuration, ultra-high torque bearing capacity, diversified installation adaptation, reliable transmission and wide complex heavy-duty environment adaptability, Weigao’s HB-Series Industrial Gear Reducer (B4HH/H2DH/H3DH/H4DH/B2DH/B3DH models) has been widely applied in various complex core heavy-duty industrial fields:
- Heavy Mining Excavation: Large mine excavators, mining conveyors, coal washing and screening systems, adapting to ultra-heavy-load, high-friction, high-impact and dusty working environments;
- Large Construction Machinery: Construction cranes, large excavators, concrete pump trucks, adapting to heavy-load, frequent impact and outdoor complex working environments;
- Port Bulk Handling: Heavy port grab cranes, large bulk cargo conveyors, port loading and unloading hoists, adapting to ultra-heavy-load, frequent impact and outdoor dusty working environments;
- Metallurgical Auxiliary Industry: Metallurgical smelting auxiliary machinery, large-scale steel casting equipment, sintering machine auxiliary systems, adapting to high-temperature, heavy-load and dusty working environments;
- Large Waste Treatment: Large-scale garbage transfer stations, waste incineration plant crushing and conveying systems, hazardous waste treatment equipment, adapting to heavy-load, high-friction, harsh environment and continuous working conditions;
IV. Technical Parameters: Precise Matching, Meeting Diverse Needs
| Item | Specification Range |
| Motor Power Adaptation | 3kW - 280kW |
| Reduction Ratio | 5 - 400 (Single-stage/Multi-stage Combination) |
| Rated Output Torque | 1000N·m - 32000N·m (Dual Wear-Resistant Impact-Resistant Series Graded) |
| Transmission Efficiency | 92% - 96% (Single-stage/Multi-stage) |
| Operating Noise | ≤75dB (Measured at 1m Distance) |
| Protection Level | IP65 (IP66 Customizable) |
| Operating Temperature | -25℃ - +120℃ |
| Installation Method | Base-mounted, Flange-mounted (B5/B14), Torque Arm-mounted, Shaft-mounted, Flange-output Mounted, Mobile Base-mounted |
| Output Shaft Type | Extra-Large-Diameter Solid Shaft (Flat Key/Spline), Extra-Large-Torque Hollow Shaft (Locking Disk), Wear-Resistant Sleeve-Equipped Shaft |
V. Installation and Maintenance: Scientific Operation, Maximizing Performance
During installation, ensure that the coaxiality error between the reducer and the motor is ≤0.12mm to avoid affecting transmission stability, wear resistance and ultra-heavy load-bearing capacity. For ultra-heavy-duty, high-vibration and high-impact environment installation, adopt reinforced concrete installation base with shock-absorbing layer and high-performance shock-absorbing pads to reduce vibration and impact impact. Select the appropriate lubricating oil according to the working conditions: use 320# wear-resistant impact-resistant ultra-heavy-duty industrial gear oil for normal temperature and medium-heavy load, 460# for high temperature and heavy load, and 680# for ultra-high load, high-friction and high-temperature continuous operation. Regularly check the oil level, oil quality, gear meshing status, fastener tightness, heat dissipation fin cleanliness and oil filter blockage; replace the lubricating oil after the first 800 hours of operation, and perform comprehensive maintenance every 4500 hours thereafter for high-friction and high-impact working conditions, including checking bearing temperature, sealing performance, housing deformation, gear wear and wear-resistant coating integrity. If abnormal phenomena such as excessive noise, obvious vibration, oil leakage, overheating, torque fluctuation or abnormal wear occur during operation, stop the machine immediately for inspection and troubleshooting.
VI. Conclusion: Graded Heavy-Duty Driven, Creating Core Industrial Transmission Value
Adhering to the design philosophy of "Wear-Resistant Impact-Resistant Grading, Ultra-Heavy-Duty Reliability, Diversified Adaptation and Stability", Weigao’s HB-Series Industrial Gear Reducer (B4HH/H2DH/H3DH/H4DH/B2DH/B3DH models) focuses on the stable and efficient transmission needs of complex core heavy-duty industrial fields, and continuously optimizes product structure and wear-resistant impact-resistant technology. Whether in wear-resistant heavy-duty transmission, ultra-heavy load impact-resistant operation or complex harsh environment scenarios, this series can provide stable and efficient power transmission solutions for customers with its dual wear-resistant impact-resistant series graded configuration, ultra-high torque bearing capacity and diversified adaptation advantages, helping to improve production stability and efficiency of complex core industrial equipment. We will continue to focus on the research and development of wear-resistant impact-resistant heavy-duty transmission technology, deeply explore the needs of different complex heavy-duty industrial fields, provide customized product solutions and global after-sales service support, and work with global customers to build a more reliable and efficient complex core industrial production system. All export products of this series have passed international certifications such as ROHS, CE and ISO9001, fully complying with the technical standards and safety requirements of various countries and regions, ensuring smooth application in global complex heavy-duty industrial markets.
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