China Best Sales Actuarot, Harmonic Driver, High Precision Harmonic Reducer, Gearbox for Industrial Robotics Hmhg-25-III bevel gearbox

Product Description

Product Description

The HMHG-III series harmonic reducer has a compact structure with a through-hole. The wave generator has a large diameter hollow shaft with cross roller bearings to withstand radial and axial loads. This institution is simple and convenient for users to install customly.

Principle of harmonic gear transmission

The harmonic gear drive was invented by the American inventor C.W.Musser in 1955. It is a new transmission mode using the elastic deformation of flexible working components to carry out movement or power transmission. It breaks through the mode of mechanical transmission using rigid components and uses a flexible component to achieve mechanical transmission. Thus, a series of special functions that are difficult to achieve with other drives are obtained. Because the deformation process of the intermediate flexible component is basically a symmetrical harmonic, it is named. In addition to the Soviet Union called this transmission waveform drive or flexible wheel drive, the United States, Britain, Germany, Japan and other countries are called “harmonic drive”.

Harmonic deceleration principle
The deceleration principle of harmonic gear transmission refers to the use of the relative motion of the flexwheel, rigid wheel and wave generator, mainly the controllable elastic deformation of the flexwheel to achieve motion and power transmission. The elliptic CAM in the wave generator rotates in the flexwheel so that the flexwheel deforms. When the flexwheel teeth and rigid wheel teeth at both ends of the long axis of the elliptic CAM of the wave generator are engaged, the flexwheel teeth at both ends of the short axis are detached from the rigid wheel teeth. The teeth between the long axis and the short axis of the wave generator are in a semi-meshing state that gradually enters the snapping along different sections of the perimeter of the flexwheel and the rigid wheel, which is called the snapping; In a semi-meshing state that gradually withdraws from engagement, it is called snapping out. When the wave generator continuously rotates, the flexwheel constantly deforms, so that the 2 wheel teeth in the biting, meshing, biting out and disengaging 4 kinds of motion constantly change their original working state, resulting in the wrong tooth movement, to achieve the active wave generator to the flexwheel movement transmission.

Product Parameters


Model Reduction ratio Rated torque at input 2000r/min Permissible CHINAMFG torque at start/ stop Permissible max.value of ave.load torque instantaneous permissibie max. torque Permissible max.input rotational speed Permissible ave.input rotational speed Backlash(arc sec) Transmission accuracy(arc sec)
Nm Nm Nm Nm r/min r/min
14 50 7 23 9 46 8000 3500 20 90
80 10 30 14 51 20 90
100 10 36 14 70 10 90
17 50 21 44 34 91 7000 3500 20 90
80 29 56 35 113 20 90
100 31 70 51 143 10 90
20 50 33 73 44 127 6000 3500 20 60
80 44 96 61 165 20 60
100 52 107 64 191 10 60
120 52 113 64 161 10 60
25 50 51 127 72 242 5500 3500 20 60
80 82 178 113 332 20 60
100 87 204 140 369 10 60
120 87 217 140 395 10 60
32 50 99 281 140 497 4500 3500 20 60
80 153 395 217 738 10 60
100 178 433 281 841 10 60
120 178 459 281 892 10 60
40 50 178 523 255 892 4000 3000 10 60
80 268 675 369 1270 10 60
100 345 738 484 1400 10 60
120 382 802 586 1530 10 60

Detailed Photos




Company Profile


HangZhou Yijiaang Automation Technology Co., Ltd. was established in 2018, specializing in the application development, sales and technical services of transmission components. Main business: planetary reducer, harmonic reducer, RV reducer, DD motor, linear motor, linear module, rotary spline screw, hollow rotary platform, CAM splitter and other products. Widely used in: CNC machine tools, packaging machinery, printing machinery, automation equipment, joint robots, medical equipment, AGV and many other fields. The company regards “providing quality products and services” as its due responsibility.
The company adheres to the spirit of technological innovation and customer service, with a positive attitude of continuous endeavour, creates the value of “quality is the core”, establishes the goal of “professional perfection”, and achieves the corporate vision of “making the world move”. Focus on transmission products technical services.



Q: What should I provide when I choose gearbox/speed reducer?
A: The best way is to provide the motor drawing with parameter. Our engineer will check and recommend the most suitable gearbox model for your refer.
Or you can also provide below specification as well:
1) Type, model and torque.
2) Ratio or output speed
3) Working condition and connection method
4) Input mode and input speed

/* March 10, 2571 17:59:20 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

Application: Machinery, Agricultural Machinery, Car, Robot
Hardness: Hardened Tooth Surface
Installation: Horizontal Type
Layout: Coaxial
Gear Shape: Cylindrical Gear
Step: Single-Step
US$ 350/Piece
1 Piece(Min.Order)

Request Sample



Customized Request

agricultural gearbox

Considerations for Heavy-Duty Farming Gearboxes

Heavy-duty farming applications require robust and reliable gearboxes that can withstand high loads, harsh conditions, and frequent use. Here are the key considerations for selecting gearboxes for heavy-duty farming:

  • Load Capacity: Heavy-duty gearboxes must have a high load-carrying capacity to handle the demands of agricultural machinery, such as tillers, plows, and combines.
  • Material Durability: Gearboxes should be constructed from durable materials, such as hardened steel or cast iron, that can withstand the stresses and impacts associated with heavy-duty tasks.
  • Sealing and Protection: Effective sealing and protection mechanisms, such as robust seals and gaskets, prevent the ingress of dirt, water, and contaminants that can cause premature wear and damage.
  • Lubrication System: A reliable and efficient lubrication system is crucial for heavy-duty gearboxes to ensure proper lubrication of components under high loads and temperatures.
  • Heat Dissipation: Heavy-duty applications generate significant heat. Gearboxes should have efficient heat dissipation mechanisms, such as cooling fins or oil coolers, to prevent overheating and maintain performance.
  • Design and Construction: Gearbox design should incorporate reinforced housing, larger bearings, and robust gears to handle heavy loads without compromising structural integrity.
  • Alignment and Mounting: Proper alignment and mounting are essential to ensure smooth and efficient power transmission. Misalignment can lead to increased wear and reduced gearbox lifespan.
  • Maintenance Accessibility: Heavy-duty gearboxes should be designed for easy maintenance access. Features such as removable covers and inspection points simplify servicing and repairs.
  • Compatibility: Gearboxes should be compatible with the specific machinery and tasks they will be used for. Customizable gear ratios and output shaft configurations enhance versatility.
  • Reliability and Longevity: Heavy-duty gearboxes should be built to last, with quality craftsmanship and components that can withstand the demanding conditions of agricultural operations.
  • Safety: Safety features, such as guards and emergency shutdown mechanisms, are essential to protect operators and nearby personnel from potential hazards.
  • Environmental Considerations: Gearbox designs should consider environmental regulations and emissions standards to minimize the impact on the environment.
  • Cost-Effectiveness: While heavy-duty gearboxes require a higher upfront investment, their durability and performance contribute to long-term cost-effectiveness by reducing downtime and the need for frequent replacements.

By carefully considering these factors, farmers can select the appropriate heavy-duty gearboxes that enhance productivity and reliability in their farming operations.

agricultural gearbox

Handling Varying Torque Demands with Agricultural Gearboxes

Agricultural gearboxes are designed to handle the varying torque demands associated with different tasks in farming operations. The torque requirements can vary based on factors such as the type of task, the soil conditions, the terrain, and the machinery’s speed. Agricultural gearboxes are equipped with features that allow them to adapt to these varying torque demands:

  • Gear Ratio Selection: Agricultural gearboxes often come with multiple gear ratios, allowing operators to select the appropriate ratio for the task at hand. Lower gear ratios provide higher torque for tasks that require more force, such as plowing or tilling, while higher gear ratios offer higher speeds for tasks like mowing or transporting.
  • Torque Multiplier: Some agricultural gearboxes are designed with torque multipliers that enhance the torque output from the engine to the wheels or implement. These multipliers are engaged when higher torque is needed, helping the machinery handle heavy loads or challenging terrain.
  • Adjustable Speeds: Many agricultural gearboxes allow operators to adjust the speed of the machinery to match the torque requirements of the task. This flexibility is essential for tasks that involve both high-torque, low-speed operations and high-speed operations with lower torque needs.
  • Power Take-Off (PTO) Options: Agricultural gearboxes often feature power take-off mechanisms that enable the transfer of power from the engine to attached implements. These mechanisms can be designed to provide varying torque outputs to suit different implements, such as rotary tillers, balers, or pumps.

The ability of agricultural gearboxes to handle varying torque demands is crucial for ensuring efficient and effective farming operations. By offering adjustable gear ratios, torque multipliers, and adaptable speeds, these gearboxes empower farmers to optimize their machinery’s performance based on the specific requirements of each task.

agricultural gearbox

Types of Agricultural Gearboxes for Specific Tasks

Various types of agricultural gearboxes are designed to cater to specific tasks and applications in farming. These gearboxes are engineered to meet the unique requirements of different agricultural machinery and operations. Some common types of agricultural gearboxes include:

  • Rotary Mower Gearboxes: These gearboxes are used in rotary mowers and cutters. They transmit power from the tractor’s power take-off (PTO) to the blades, enabling efficient cutting of grass, crops, and vegetation.
  • Manure Spreader Gearboxes: Manure spreaders utilize specialized gearboxes to distribute manure evenly across fields. These gearboxes ensure consistent spreading of fertilizer while accommodating variable loads.
  • Harvesting Gearboxes: Gearboxes used in harvesting equipment, such as combines and harvesters, enable efficient gathering, threshing, and separating of crops from their stalks. These gearboxes handle high loads and varying operating conditions.
  • Seed Drill Gearboxes: Seed drills require gearboxes to distribute seeds accurately and at consistent intervals. These gearboxes ensure precise seed placement for optimal germination and crop growth.
  • Hay Rake Gearboxes: Hay rakes utilize gearboxes to gather and arrange hay into windrows for baling. These gearboxes help optimize the hay collection process.
  • Irrigation System Gearboxes: Agricultural irrigation systems may use gearboxes to control the movement and positioning of irrigation equipment, ensuring efficient water distribution across fields.
  • Tillage Equipment Gearboxes: Gearboxes used in tillage equipment, such as plows and cultivators, help break up soil, prepare seedbeds, and promote seedling emergence.
  • Tractor Gearboxes: Tractors may incorporate various gearboxes for tasks such as shifting gears, driving the power take-off, and operating attachments.
  • Grain Auger Gearboxes: Grain augers use gearboxes to facilitate the movement of harvested grain from one location to another, such as from a combine to a storage bin.

Each type of agricultural gearbox is designed with specific features, load capacities, and durability to suit the demands of its intended task. Manufacturers engineer these gearboxes to withstand the challenging conditions of agricultural operations while ensuring efficient and reliable performance.

China Best Sales Actuarot, Harmonic Driver, High Precision Harmonic Reducer, Gearbox for Industrial Robotics Hmhg-25-III   bevel gearbox	China Best Sales Actuarot, Harmonic Driver, High Precision Harmonic Reducer, Gearbox for Industrial Robotics Hmhg-25-III   bevel gearbox
editor by CX 2024-01-23