China Professional CZPT Series Hard Faced Speed Reducer Gearbox for Extruder Blowing Equipment gearbox assembly

Product Description

Product Description

ZLYJ series Reduction Gearbox (speed reducer) is a transmission part for most single screw extrusion line, wihch also possesses high precision hard gear surface and thrust block designed. Designed with standard ZBJ19009-88, it combines well with most of machines from different suppliers. Also the gear and axis parts are made of high strength alloy steel with surface hardness HRC54~62. In the front end of hollow input axis there is large specification thrust bearing that will bear axial thrust force while the screw is working

>Applied Circumstance
1. All kind of extrusion & blowing machinery
2. High speed shaft rotation Speed <1500RPM
3. Working Environment Temp. -40~45°C, with temperature below 0°C, should pre-heat lubrication oil to above 0°C

>Major Technical Index
1. Output Speed: 16-100 RPM
2. Output Torque: Max.4300 Nm
3. Motor Power: 5.5-200 Kw

>Selection of Gearbox
1. Select speed ratio
e.g. input speed n1=1000rpm, output speed n2=70rpm, ratio i=n1/n2=14.28, should select ratio 14
2. Select model type according to input power
e.g. input power P=26kw, after checking form, 29kw>26kw, most ecomonic should be ZLYJ200
3. Select assemble type
as per actual use, select horizontal or vertical type
4. Calculate axial thrust Fa=π*Ds²*Ps/(4*1000)
e.g. Screw diameter Ds=75mm, Screw pressure Ps=26MPa
187kN>114.8kN, ZLYJ200 can bear the axial thrust and economic to select
5. Confirm connection size
6. Confirm cooling type

Parameters Concerned

Recommended Products




Standard: DIN, GB, JIS
Technics: Forging
Feature: Recycle
Material: Metal
Output Speed: 30-180rpm
Ratio: 8, 10, 12.5, 14, 16, 18, 20
US$ 2000/Set
1 Set(Min.Order)

Request Sample



Customized Request

speed reducer gearbox

Ensuring Precision of Gear Tooth Profiles in Speed Reducer Gearboxes

Manufacturers employ several techniques to ensure the precision of gear tooth profiles in speed reducer gearboxes, which is crucial for optimal performance and longevity:

  • High-Quality Materials: Manufacturers use high-quality materials for gear manufacturing, such as hardened steel or specialized alloys, to enhance durability and minimize wear.
  • Precision Machining: Advanced machining processes, including CNC (Computer Numerical Control) machining and grinding, ensure accurate tooth profiles and precise gear dimensions.
  • Tooth Profile Design: Detailed tooth profile designs based on mathematical calculations and engineering principles help optimize meshing and minimize stress concentration.
  • Tooth Forming Techniques: Various tooth forming methods, such as hobbing, shaping, and broaching, are employed to create accurate gear tooth profiles with minimal deviations.
  • Heat Treatment: Heat treatment processes like carburizing, quenching, and tempering are used to achieve the desired hardness and strength, ensuring gear teeth can withstand operational stresses.
  • Quality Control: Rigorous quality control measures, including inspection using precision tools like coordinate measuring machines (CMMs), ensure compliance with design specifications.
  • Lubrication and Surface Coatings: Proper lubrication and specialized surface coatings help reduce friction and wear, maintaining accurate tooth profiles during operation.

By implementing these techniques and adhering to stringent quality standards, manufacturers can achieve the required precision in gear tooth profiles, resulting in smooth and efficient operation of speed reducer gearboxes.

speed reducer gearbox

Impact of Gear Ratios on Performance of Speed Reducer Gearboxes

Gear ratios in speed reducer gearboxes play a crucial role in determining their performance characteristics and capabilities. The gear ratio represents the ratio of the number of teeth on the driving (input) gear to the number of teeth on the driven (output) gear within the gearbox. This ratio directly affects how the gearbox transforms the input speed and torque into the desired output speed and torque.

Speed Reduction: A higher gear ratio in a speed reducer gearbox results in greater speed reduction. In this case, the input shaft’s higher rotational speed is converted into a lower rotational speed at the output shaft. This is advantageous for applications that require increased torque and reduced speed, such as heavy-duty machinery and conveyor systems.

Speed Increase: Conversely, a lower gear ratio in a speed reducer gearbox leads to speed increase. The input shaft’s rotational speed is transformed into a higher rotational speed at the output shaft, albeit with decreased torque. This configuration is useful in applications where higher speed is necessary, such as certain types of pumps and fans.

The choice of gear ratio is a critical design consideration when selecting a speed reducer gearbox for a specific application. It determines the trade-off between speed and torque, allowing engineers to tailor the gearbox’s performance to match the requirements of the machinery and equipment it will drive.

speed reducer gearbox

What Advantages Does a Speed Reducer Gearbox Offer in Industrial Applications?

A speed reducer gearbox provides numerous advantages that make it a valuable component in a wide range of industrial applications. These advantages contribute to improved efficiency, performance, and reliability of machinery and equipment.

1. Speed Reduction: One of the primary benefits of a speed reducer gearbox is its ability to reduce the rotational speed of an input shaft, which is often provided by a high-speed power source such as an electric motor. This speed reduction is crucial in applications where the output speed needs to be lower than the input speed to achieve optimal performance. For example, in manufacturing processes or conveyor systems, a slower output speed is often necessary for precise control and safe handling of materials.

2. Torque Increase: The gear arrangement within a speed reducer gearbox leads to an increase in torque at the output shaft compared to the input shaft. This torque amplification is essential for applications that require higher levels of force to overcome resistance, move heavy loads, or perform work. The gearbox’s ability to multiply torque ensures that machinery can handle demanding tasks effectively.

3. Mechanical Advantage: Speed reducer gearboxes utilize gear trains and ratios to create a mechanical advantage. This advantage allows the gearbox to convert high-speed, low-torque input power into low-speed, high-torque output power. The mechanical advantage enhances the efficiency of power transmission and motion control, making it well-suited for applications that involve both speed reduction and torque increase.

4. Versatility: Speed reducer gearboxes are highly versatile and can be tailored to specific application requirements. Manufacturers offer a variety of gear ratios, sizes, and configurations, allowing for customization to achieve the desired output characteristics. This adaptability ensures that gearboxes can be integrated into a wide range of machinery and equipment across different industries.

5. Smooth Operation: The precise meshing of gears in a speed reducer gearbox results in smooth and consistent power transmission. This characteristic is crucial for applications that demand accurate and controlled movement, such as robotics and automated systems. The gearbox’s ability to maintain steady motion contributes to the overall efficiency and performance of the system.

6. Energy Efficiency: By converting high-speed, low-torque input power into a lower-speed, higher-torque output, speed reducer gearboxes help optimize energy usage. This energy-efficient operation can lead to reduced power consumption, lower operating costs, and improved sustainability in industrial processes.

7. Noise and Vibration Reduction: The gear arrangement in a speed reducer gearbox can help dampen noise and vibrations produced by the power source. This is particularly beneficial in applications where noise reduction is essential for a comfortable working environment or to prevent damage to sensitive equipment.

In summary, a speed reducer gearbox offers advantages such as speed reduction, torque amplification, mechanical advantage, versatility, smooth operation, energy efficiency, and noise reduction. These benefits make speed reducer gearboxes indispensable components in various industrial settings, enhancing the overall performance and productivity of machinery and systems.

China Professional CZPT Series Hard Faced Speed Reducer Gearbox for Extruder Blowing Equipment   gearbox assembly	China Professional CZPT Series Hard Faced Speed Reducer Gearbox for Extruder Blowing Equipment   gearbox assembly
editor by CX 2023-10-16