Select Page

Product Description

UMC is the industry leader in gearbox technology. Over our 40 year history we have introduced many industry changing gearboxes such as the patented TNT gearbox, the 740, the 760, the 775 and more. We continue to define and redefine industry standards for gearbox performance, quality, features and technology. Our gearboxes are purpose built to do the job. Never over-engineered.

UMC stands behind its products and is committed to manufacturing the best products for a global market.

740-U 50:1 Ratio

Designed for longer spans, larger wheels, and heavier towers.
 

Features and Benefits

  • 2.25 inch output shaft
  • 50:1 gear ratio
  • Cartridge input and output seals
  • Larger input bearings
  • Input shaft guard
  • External seal protectors for input and output seals
  • Top oil fill plug
  • Universal mounting pattern
  • Full cycle expansion chamber with stainless steel cover
  • Filled with extreme pressure worm gear oil
  • Steel output shaft and input shaft
  • Tapered roller bearings
  • Includes carriage bolts and nuts
  • Dual ended input shaft

740-UV 52:1 Ratio
Designed for longer spans, larger wheels and heavier towers where an extended output shaft is required.
 This gearbox has all the same capabilities, features and benefits that the standard 740 has with a few tweaks. The output shaft is extended, the gear ratio is 52:1 and the input shaft is made of ductile iron with a 25° pressure angle allowing this gearbox to be used on center CHINAMFG and lateral move/ linear systems that come standard with these specifications.

Features and Benefits

  • 2.25 inch extended output shaft
  • 52:1 gear ratio with 25° pressure angle
  • Cartridge input and output seals
  • Larger input bearings
  • Input shaft guard
  • External seal protectors for input and output seals
  • Top oil fill plug
  • Universal mounting pattern
  • Full cycle expansion chamber with stainless steel cover
  • Filled with extreme pressure worm gear oil
  • Steel output shaft and ductile iron input shaft
  • Tapered roller bearings
  • Includes carriage bolts and nuts
  • Dual ended input shaft

 

760-UV Gearbox

Designed for corner systems and lateral move carts where an extended output shaft is required

 

Growers typically use UMC’s 760-UV gearbox for the most extreme applications where an extended output shaft is required. The gearbox is designed for higher annual hours of operation while handling the heavy loads experienced on corner systems and lateral move carts as well as the most extreme field conditions where wheel rutting is prominent, soil is heavy, and tower weights are higher.

 

The UMC 760-UV final drive gearbox is our largest and most durable gearbox with an extended output shaft. It features a larger-diameter bull gear than the standard 740 series to handle 20% higher torque. It also features a 2.5″ output shaft to accommodate more overhung load. It is designed for use on center pivots, corners, lateral move/ linear irrigation systems and carts where a 52:1 gear ratio and extended output shaft are standard specifications.

Features and Benefits

  • 2.5″ output shaft
  • 52:1 gear ratio with a 25° pressure angle
  • Unique dual input and output seal design
  • 20% more torque capacity than the standard 740
  • Bronze gear optional
  • Larger input bearings
  • Input shaft guard
  • External seal protectors for input and output seals
  • 11-Bolt mounting pattern
  • Full cycle expansion chamber with aluminum cover
  • Filled with extreme pressure worm gear oil
  • Steel output shaft and ductile iron input shaft
  • Tapered roller bearings
  • Includes carriage bolts and nuts
  • Dual ended input shaft

TNT-2 Gearbox

Designed for applications where the irrigation system may need to be towed

 

This gearbox is the perfect solution for a towable irrigation system. Growers typically prefer this gearbox over a gearbox with a towable hub. Simply disengage the worm and tow your system to its working location, then re-engage the worm and you are ready to run. The CX coupler is the perfect compliment for the TNT-2 gearbox due to the ability to control coupler disengagement at the gearbox.

 

The UMC patented TNT-2 final drive gearbox is designed specifically for applications where a center CHINAMFG or lateral move/ linear irrigation system needs to be towed. The gearbox provides the ability to disengage the worm gear and allows users to move systems from 1 area to another without requiring a Towable Hub add on.

Features and Benefits

  • 2.25″ output shaft
  • 50:1 gear ratio
  • Dual input seals with triple lip output seals
  • Bronze gear optional
  • Input shaft guard
  • External seal protectors for input and output seals
  • Top oil fill plug
  • 11-Bolt mounting pattern
  • Full cycle expansion chamber with stainless steel cover
  • Filled with extreme pressure worm gear oil
  • Steel output shaft and input shaft
  • Tapered roller bearings
  • Includes carriage bolts and nuts
  • Dual ended input shaft

 
 

760-UV Bronze Gearbox

Designed for the most extreme conditions where an extended output shaft is required.

 

Growers typically use The UMC 760-UV bronze gearbox for the most extreme applications where an extended output shaft is required. The gearbox is designed for higher annual hours of operation while handling the heavy loads experienced on corner systems and lateral move carts as well as the most extreme field conditions where wheel rutting is prominent, soil is heavy, and tower weights are higher.

 

The UMC 760-UV Bronze final drive gearbox is our largest and most durable gearbox with an extended output shaft designed for the most extreme growing conditions. It features a high strength aluminum bronze bull gear and a heat treated steel worm gear giving it a much higher load capacity than the standard 760-UV. Additionally, this gear combination greatly reduces gear wear, extending the useful life of the gearbox. It also features a 2.5″ output shaft to accommodate more overhung load. It is designed for use on center pivots, corners, lateral move/ linear irrigation systems and carts where a 52:1 gear ratio and extended output shaft are standard specifications.

Features and Benefits

  • 2.5″ output shaft
  • 52:1 gear ratio with a 25° pressure angle
  • Unique dual input and output seal design
  • Bronze Gear
  • Heat Treated Steel Worm Gear
  • Larger input bearings
  • Input shaft guard
  • External seal protectors for input and output seals
  • 11-Bolt mounting pattern
  • Full cycle expansion chamber with aluminum cover
  • Filled with extreme pressure worm gear oil
  • Steel output shaft
  • Tapered roller bearings
  • Includes carriage bolts and nuts
  • Dual ended input shaft
  • Also Available Assembled in the USA

CHINAMFG is the industry leader in gearbox technology. Over 37 year history they have introduced many industry changing gearboxes such as the patented TNT gearbox, the 740, the 760, the 775 and more. CHINAMFG continue to define and redefine industry standards for gearbox performance, quality, features and technology. CHINAMFG gearboxes are purpose built to do the job. Never over-engineered.UMC stands behind its products and is committed to manufacturing the best products for a global market.

  /* 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: Motor, Agricultural Machinery, Agricultural
Function: Speed Reduction
Hardness: Hardened
Type: Worm and Wormwheel
Material: Cast Iron
Manipulate Way: Semi-Automatic Manipulation
Customization:
Available

|

Customized Request

worm gearbox

Calculating Gear Ratio in a Worm Reducer

The gear ratio in a worm reducer is determined by the number of teeth on the worm wheel (also known as the worm gear) and the number of threads on the worm shaft. The gear ratio formula for a worm reducer is:

Gear Ratio = Number of Teeth on Worm Wheel / Number of Threads on Worm Shaft

For example, if the worm wheel has 60 teeth and the worm shaft has a single thread, the gear ratio would be 60:1.

It’s important to note that worm reducers have an inherent self-locking property due to the angle of the worm threads. As a result, the gear ratio also affects the mechanical advantage and the system’s ability to resist backdriving.

When calculating the gear ratio, ensure that the worm reducer is properly designed and that the gear ratio aligns with the desired mechanical characteristics for your application. Additionally, consider factors such as efficiency, load capacity, and speed limitations when selecting a gear ratio for a worm reducer.

worm gearbox

Energy Efficiency of a Worm Gearbox: What to Expect

The energy efficiency of a worm gearbox is an important factor to consider when evaluating its performance. Here’s what you can expect in terms of energy efficiency:

  • Typical Efficiency Range: Worm gearboxes are known for their compact size and high gear reduction capabilities, but they can exhibit lower energy efficiency compared to other types of gearboxes. The efficiency of a worm gearbox typically falls in the range of 50% to 90%, depending on various factors such as design, manufacturing quality, lubrication, and load conditions.
  • Inherent Losses: Worm gearboxes inherently involve sliding contact between the worm and worm wheel. This sliding contact generates friction, leading to energy losses in the form of heat. The sliding action also contributes to lower efficiency when compared to gearboxes with rolling contact.
  • Helical-Worm Design: Some manufacturers offer helical-worm gearbox designs that combine elements of helical and worm gearing. These designs aim to improve efficiency by incorporating helical gears in the reduction stage, which can lead to higher efficiency compared to traditional worm gearboxes.
  • Lubrication: Proper lubrication plays a significant role in minimizing friction and improving energy efficiency. Using high-quality lubricants and ensuring the gearbox is adequately lubricated can help reduce losses due to friction.
  • Application Considerations: While worm gearboxes might have lower energy efficiency compared to other types of gearboxes, they still offer advantages in terms of compactness, high torque transmission, and simplicity. Therefore, the decision to use a worm gearbox should consider the specific requirements of the application, including the trade-off between energy efficiency and other performance factors.

When selecting a worm gearbox, it’s essential to consider the trade-offs between energy efficiency, torque transmission, gearbox size, and the specific needs of the application. Regular maintenance, proper lubrication, and selecting a well-designed gearbox can contribute to achieving the best possible energy efficiency within the limitations of worm gearbox technology.

worm gearbox

What is a Worm Gearbox and How Does It Work?

A worm gearbox, also known as a worm gear reducer, is a mechanical device used to transmit rotational motion and torque between non-parallel shafts. It consists of a worm screw and a worm wheel, both of which have helical teeth. The worm screw resembles a threaded cylinder, while the worm wheel is a gear with teeth that mesh with the worm screw.

The working principle of a worm gearbox involves the interaction between the worm screw and the worm wheel. When the worm screw is rotated, its helical teeth engage with the teeth of the worm wheel. As the worm screw rotates, it translates the rotational motion into a perpendicular motion, causing the worm wheel to rotate. This perpendicular motion allows the worm gearbox to achieve a high gear reduction ratio, making it suitable for applications that require significant speed reduction.

One of the key features of a worm gearbox is its ability to provide a high gear reduction ratio in a compact design. However, due to the sliding nature of the meshing teeth, worm gearboxes may exhibit higher friction and lower efficiency compared to other types of gearboxes. Therefore, they are often used in applications where efficiency is not the primary concern but where high torque and speed reduction are essential, such as conveyor systems, elevators, automotive steering systems, and certain industrial machinery.

China Good quality CZPT Wheel Gearbox on Irrifrance Center CZPT and Lateral Move Irrigation System   with Hot selling		China Good quality CZPT Wheel Gearbox on Irrifrance Center CZPT and Lateral Move Irrigation System   with Hot selling
editor by CX 2024-01-09