China Professional High Torque Zsyj Horizontal Single Screw Extruder Gear Reducer raw gear

Product Description


Product Description

This gearbox is designed for plastic extrusion machine. It  meet JB/T9040-1999 standard.  The gear is made of high-strength alloy steel and hardened by carburizing and quenching. The accuracy of grinding teeth is higher than Level 6 and the hardness is HRC 54-62. In the front of output shaft,we assemble a thrust bearing with  high safety factor to bear the extrusion pressure of screw.

Detailed Photos


Loading capacity sheet of CHINAMFG and ZSYJ reduction gearboxes
Spec     * * * * * * * * * * * *
112 133 146 173 200 225 250 280 315 330 375 395 420 450 500 560 630 450 560 530
-8 -8 -10 -12.5 -12.5 -16 -16 -16 -16 -16 -16 -16 -16 -12 -20 -20 -20 -32 -57 -44
Normal input power(kw) n=1500rpm
Ordinary reliable 15 22 30.8 39 55 75 82.5 116 171 _ 260 300 315 332 450 600 825 240 240 370
High reliable 10 15 18.3 30.8 45 60 67 75 116 207 207 240 250 266 350 550 675 200 220 315
  Allowable output torque(N.m)
Ordinary reliable 800 1165 1962 2484 4379 6568 7643 11822 17427 _ 26497 3571 32102 38599 5571 76433 105095 48917 87134 103694
High reliable 525 764 1165 1962 3583 5334 6306 7643 11822 21000 21096 24380 25478 33885 44566 70063 85978 40764 79873 88280

Recommended parameters of single-screw extruder machine reduction gearbox(Optional)
Type Spec. Power/Kw Speed-Input Speed-Output Load torque/N.m Axial force/KN Screw diameter Length-Diameter Ratio
ZLYJ 112-8 5.5 800 100 525 35 less than 35 25:1
113-8 6 800 100 764 39 50 25:1
146-10 11 1000 100 1050 54 55 25:1
173-10 18.5 900 90 1962 110 65 25:1
200-12.5 30 1000 80 3581 155 75 25:1
225-12.5 45 1000 80 5371 180 90 25:1
250-16 55 1120 70 7503 192 105 25:1
280-16 75 960 60 7643 258 110 25:1
315-16 85 960 60 13528 287 120 25:1
330-16 110 960 60 17528 360 135 25:1
375-16 132 960 60 21008 390 150 25:1
395-16 185 960 60 29442 400 160 25:1
420-16 160/220 960 60 31831 430 160/170
450-20 213 1000 60 40640 500 180 25:1
500-20 220 1000 50 42571 550 180 25:1
560-17 440 1000 50 84034 700 200 25:1
630-10 540 1000 50 15712 770 250 25:1
ZSYJ 450-32 200 1500 47 4 0571 500 165 25:1
560-57 220 1500 26 80802 700 190 25:1

Company Profile

Zhe jiang yifan gear box group CO., LTD was set up in 1970. It specializes in developing and producing small and medium-sized marine gearboxes, plastic extruder slowdown bins, Z4 DC motors,generators and so on.There are mainly 300 moreproduction equipments,including more than60 big,fine and expensive ones. The area of our company is 110, 000 square meters.There are 350 staff,and 25%of the total number are the middle and senior technical members. Since the venture,we commit toresearching and developing new products,and keeping improving the technology. We pay great attention to the after-salesservice. All of these efforts increase the developing footsteps of our company. We have strong technical strength , sophisticatedprocessing equipments,advanced products detection equipments,and own a complete security system including productsdesigned,mechanical processing,unit assembly,testing before coming out from the factory and after-sales service. Ourproducts have passed the ISO9001 Quality System Certification.





Our Advantages

1: High transmission efficiency
2: Smooth operation and low noise
3: Small size and high carrying capacity.
4: Easy to disassemble and easy to install.


Q: Are you trading company or manufacturer?
A: We are factory.

Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock.

Q: Can we buy 1 pc of each item for quality testing?
A: Yes, we are glad to accept trial order for quality testing.

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Application: Machinery
Function: Speed Reduction
Layout: Coaxial
Hardness: Hardened Tooth Surface
Installation: Horizontal Type
Step: Double-Step
US$ 500/Piece
1 Piece(Min.Order)

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screw gear

How does a screw gear impact the overall efficiency of a system?

A screw gear, also known as a worm gear, plays a significant role in the overall efficiency of a system. The design and characteristics of the screw gear can influence several factors that affect the system’s efficiency. Here’s a detailed explanation of how a screw gear impacts the overall efficiency of a system:

  • Gear Ratio: The gear ratio of a screw gear system determines the relationship between the input and output speeds. In a screw gear, the gear ratio is typically high, which means that a small rotation of the worm gear results in a larger rotation of the worm wheel. This high gear ratio allows for precise control and slow movement, but it also leads to a trade-off in terms of mechanical efficiency. The high gear ratio can result in a lower mechanical efficiency due to increased friction and power loss.
  • Friction and Efficiency: Screw gears inherently introduce more friction compared to other gear types due to the sliding motion between the worm and the worm wheel. This sliding action generates friction, which can reduce the overall efficiency of the system. The efficiency of a screw gear system depends on various factors, including the materials used, the lubrication, and the design parameters. Proper lubrication and the use of high-quality materials can help minimize friction and improve the efficiency of the system.
  • Lubrication and Efficiency: Adequate lubrication is crucial for reducing friction and maximizing the efficiency of a screw gear system. The lubricant forms a film between the contacting surfaces of the worm gear and worm wheel, reducing direct metal-to-metal contact and minimizing frictional losses. Insufficient or improper lubrication can lead to increased friction, higher operating temperatures, and reduced efficiency. Therefore, proper lubrication, including the selection of the appropriate lubricant type and viscosity, is essential for optimizing the efficiency of the system.
  • Backlash: Backlash refers to the play or clearance between the mating teeth of the worm gear and worm wheel. Excessive backlash can lead to energy loss and reduced efficiency. It can cause vibrations, impacts, and inefficient power transmission. Therefore, minimizing backlash through precise manufacturing and proper meshing of the gears is essential for maintaining high efficiency in a screw gear system.
  • Mechanical Efficiency: The mechanical efficiency of a screw gear system is influenced by various factors, including the design, manufacturing tolerances, lubrication, load conditions, and operating speed. In general, screw gears tend to have lower mechanical efficiency compared to other gear types, such as spur gears or helical gears. However, advancements in gear design, materials, and lubrication technologies have improved the overall efficiency of screw gear systems in recent years.
  • Application Considerations: The impact of a screw gear on the overall efficiency of a system also depends on the specific application requirements. Screw gears are commonly used in applications that prioritize precise motion control over high efficiency, such as in applications requiring heavy loads or precise positioning. In such cases, the advantages of screw gears, such as high gear ratios and self-locking capabilities, outweigh the potential efficiency trade-offs.

It is important to note that the overall efficiency of a system is influenced by multiple factors beyond the screw gear itself, including other components, power transmission losses, and system design. Therefore, when evaluating the efficiency of a system, it is essential to consider the collective impact of all components and factors involved.

screw gear

How do you retrofit an existing mechanical system with screw gears?

Retrofitting an existing mechanical system with screw gears, also known as worm gears, involves replacing or modifying the existing gear system to incorporate screw gears. Here’s a detailed explanation of the steps involved in retrofitting an existing mechanical system with screw gears:

  1. Evaluate the Existing System: Begin by evaluating the existing mechanical system to understand its design, function, and the specific requirements for retrofitting. Identify the type of gears currently in use and assess their limitations or shortcomings that warrant the retrofit. Consider factors such as load capacity, speed requirements, space constraints, and the desired performance improvements.
  2. Analyze Compatibility: Determine the compatibility of screw gears with the existing system. Consider factors such as available space, alignment requirements, torque and speed requirements, and the feasibility of integrating screw gears into the system. Assess whether any modifications or adaptations are needed to accommodate the screw gears effectively.
  3. Design Considerations: Based on the evaluation and compatibility analysis, develop a design plan for incorporating screw gears into the existing system. Consider aspects such as gear ratios, torque requirements, lubrication systems, mounting arrangements, and any necessary modifications to the system components or structure. Ensure that the design meets the specific performance and functional objectives of the retrofit.
  4. Select Screw Gear Components: Choose the appropriate screw gear components based on the design requirements and the specifications of the existing system. Consider factors such as gear material, tooth profile, helix angle, pitch diameter, and the number of starts. Select components that are compatible with the load, speed, and operating conditions of the retrofit application.
  5. Fabrication or Procurement: Once the screw gear components are selected, proceed with the fabrication or procurement of the required parts. This may involve manufacturing the screw gear components or purchasing them from a reliable supplier. Ensure that the components meet the specified quality standards and are suitable for the retrofit application.
  6. Installation: Install the screw gears into the existing mechanical system as per the design plan. This may involve removing the old gears and replacing them with the new screw gears or modifying the existing gear system to accommodate the screw gears. Follow proper installation procedures, ensuring correct alignment, lubrication, and torque specifications.
  7. Testing and Adjustment: After the installation, conduct thorough testing of the retrofitted system to verify its performance and functionality. Check for proper gear engagement, smooth operation, and the ability to handle the intended loads and speeds. Make any necessary adjustments or fine-tuning to optimize the performance of the retrofit and ensure its reliable operation.
  8. Documentation and Maintenance: Document the retrofit process, including design specifications, installation procedures, and any modifications made to the existing system. This documentation will be valuable for future reference, maintenance, and troubleshooting. Establish a regular maintenance schedule to inspect and maintain the retrofitted system, including lubrication, gear wear monitoring, and any recommended servicing.

Retrofitting an existing mechanical system with screw gears requires careful planning, design considerations, and proper execution. By following these steps and ensuring compatibility, proper component selection, and installation, it is possible to successfully integrate screw gears into an existing system, improving its performance, efficiency, and functionality.

screw gear

What industries commonly use screw gears?

Screw gears, also known as worm gears, find applications in a variety of industries due to their unique characteristics and functionalities. The following are some of the industries that commonly use screw gears:

  • Manufacturing and Machinery: The manufacturing and machinery industry extensively utilizes screw gears in various equipment and machinery. Screw gears are commonly found in gearboxes and power transmission systems, providing speed reduction and torque multiplication. They are used in conveyor systems, packaging machines, material handling equipment, and other industrial machinery that require controlled motion and high gear ratios.
  • Automotive: The automotive industry utilizes screw gears in specific applications, most notably in steering mechanisms. Screw gears are employed in worm and sector steering gears to convert the rotational motion of the steering wheel into the linear motion required for turning the vehicle’s wheels. The self-locking property of screw gears is advantageous in maintaining the position of the wheels after steering input.
  • Elevators and Lifts: Screw gears are widely used in the elevator and lift industry for vertical transportation systems. They play a crucial role in the elevator hoisting mechanism, where the rotational motion of the motor is converted into vertical movement. The high gear reduction ratio provided by screw gears enables controlled and precise lifting operations in elevators and lifts.
  • Valve and Actuation Systems: Screw gears have significant applications in industries that involve valve control and actuation. They are utilized in valve actuators to convert rotational motion into linear motion for precise positioning of valve stems. Screw gears are commonly found in water treatment plants, oil refineries, chemical processing facilities, and other industries that require accurate flow control and fluid system management.
  • Robotics and Automation: Screw gears play a vital role in robotics and automation systems. They are utilized in robot joints and robotic arm mechanisms to provide precise movement and positioning. Screw gears enable controlled and repeatable motion, making them suitable for applications that require accurate manipulation, such as assembly lines, pick-and-place machines, and robotic surgery systems.
  • Camera and Optics: The camera and optics industry utilizes screw gears in lens control systems. Screw gears are employed for focus adjustment, zooming, and aperture control in camera lenses and telescope mechanisms. The precise movement provided by screw gears enables accurate focusing, zooming, and optical alignment, contributing to high-quality image capture and optical performance.
  • Medical Equipment: Screw gears find applications in the medical equipment industry, particularly in devices that require controlled and precise movement. They are used in surgical robots, prosthetic limbs, medical imaging devices, and other medical instruments. Screw gears enable accurate motion control and positioning, while their self-locking property is advantageous for maintaining stable positions and preventing undesired movement.
  • Security Systems: Screw gears are utilized in security systems, including combination locks and safes. They provide the mechanical advantage necessary for rotating the locking mechanisms and ensuring secure operation. The self-locking property of screw gears adds an extra layer of security by preventing unauthorized access through reverse rotation or manipulation.

These are just a few examples of the industries that commonly use screw gears. The unique capabilities of screw gears, such as high gear ratios, precise motion control, and self-locking functionality, make them valuable in various sectors where efficient power transmission, accurate positioning, and controlled movement are essential.

China Professional High Torque Zsyj Horizontal Single Screw Extruder Gear Reducer raw gearChina Professional High Torque Zsyj Horizontal Single Screw Extruder Gear Reducer raw gear
editor by CX 2024-04-09