China OEM Factory Direct Screw Conveyor Powder Worm Gear Speed Reducer Gear Box bevel gearbox

Product Description

Product Description

Gear reducers are enclosed helical gears with hollow inputs.
The gear is mounted directly on the input shaft of the gear and receives support from a motor mounting bracket mounted on the machine housing. 
No additional parts are required to transfer torque from the reducer to the machine.
It can be mounted in vertical, horizontal or inclined position.
Shaft-mounted gear reducers typically have 5:1 7:1 10:1 reduction ratios and output speeds ranging from 1 to 300 rpm.

M4 series gear reducer can be installed directly on screw conveyors and feeders with a XUH seal installed on the output shaft of the gearbox. 
Ensure that cement, and fly ash powder will not get into the gearbox and extend the service life of the gearbox.
More suitable for bulk materials, grain and aggregate handling industries


M4 series gearboxes come in 5 sizes (M41 / M43 / M45 / M47 / M49). 
Nominal gear ratios are in accordance with Ra 10 CHINAMFG 2017 (5, 6, 7, 10). Cylindrical gears with helicoidal teeth. 
M4 series gearboxes can be mounted directly on screws: in this case, the XUH type output shaft seal is usually installed. 
M4 series gearboxes are supplied with grease for use at ambient temperatures (0°C – 40°C).

– Helical gearbox
– Nominal torque that can be transferred to the output shaft: up to 1500 Nm.
– Installed power at the input up to 30 kW.
– Operation at ambient temperature (0°C – 40°C).
– DIN 5482 involute spline output shafts
– Flange mounting on motor and output side
– Precision-machined cylindrical bevel gears with teeth.
– Flange mounting on motor and output side

– Easy installation
– Quick maintenance
– Low installation costs






Pre-sales Commitment

1. For user inquiries, quick response, warm reception, and answer all questions.
2. Provide detailed design information free of charge within 24 hours.

Commitment in Sales

1. All ex-factory products meet the quality standards specified in the contract. All products are tested according to customer requirements before delivery.
2. After the contract is signed, the customers are welcome to the site of our company for supervision.

After-sales Commitment

1. We provide technical support for customers. If necessary, the product can be debugged on-site, and relevant operators can be trained to solve user problems.
2.  24 hours to solve the problems for customers. Product use a day, a day of service.
3. Set up a high-quality service team, and set up product files for regular return visits.

Application: Machinery
Hardness: Hardened Tooth Surface
Installation: Vertical Type
Layout: Coaxial
Gear Shape: Conical – Cylindrical Gear
Step: Four-Step
US$ 100/Piece
1 Piece(Min.Order)

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screw gear

What lubrication is required for screw gears?

Proper lubrication is essential for the efficient and reliable operation of screw gears, also known as worm gears. The lubrication requirements for screw gears depend on various factors, including the application, operating conditions, and the materials used in the gear system. Here’s a detailed explanation of the lubrication considerations for screw gears:

Selection of Lubricant:

When selecting a lubricant for screw gears, it is important to consider the following factors:

  • Type of Lubricant: There are different types of lubricants available, such as oils, greases, and solid lubricants. The selection depends on factors such as operating speed, temperature range, load capacity, and environmental conditions. Consult the gear manufacturer’s recommendations or industry standards to determine the suitable lubricant type for the specific application.
  • Viscosity: The lubricant viscosity should be chosen based on the operating conditions of the screw gear system. Higher viscosity lubricants are typically used for heavier loads or higher temperatures, while lower viscosity lubricants are suitable for lighter loads or lower temperatures. The viscosity should be within the range recommended by the gear manufacturer.
  • Additives: Some lubricants contain additives that provide additional benefits, such as improved anti-wear properties, corrosion resistance, or extreme pressure protection. Consider the specific requirements of the screw gear system and choose a lubricant with suitable additives, if necessary.

Lubrication Guidelines:

Here are some general guidelines for lubricating screw gears:

  • Initial Lubrication: Apply an appropriate amount of lubricant during the initial installation of the screw gear system. Ensure that all gear surfaces, including the worm and the worm wheel, are adequately coated with lubricant.
  • Replenishment: Regularly monitor the lubricant level and condition of the screw gear system. Over time, lubricant may degrade, become contaminated, or lose its effectiveness. Follow the manufacturer’s recommendations for lubricant replenishment intervals and quantities. In some cases, lubricant replenishment may be necessary during routine maintenance.
  • Proper Lubricant Distribution: Ensure that the lubricant is evenly distributed across the contacting surfaces of the screw gears. The lubricant should adequately cover the threads of the worm and the teeth of the worm wheel to reduce friction and wear. Proper lubricant distribution can be achieved through rotational movement of the gears or by applying the lubricant directly to the contact area.
  • Prevent Excessive Lubrication: While proper lubrication is essential, excessive lubrication can lead to problems such as overheating, increased drag, and leakage. Follow the manufacturer’s recommendations regarding the appropriate lubricant quantity. Avoid over-greasing or over-oiling the screw gear system.
  • Cleanliness: Maintain cleanliness when lubricating screw gears. Ensure that the lubrication equipment, such as grease guns or oilers, is clean and free from contaminants. Contaminants, such as dirt or debris, can compromise the lubricant’s performance and increase wear on the gears.

It is important to note that the lubrication requirements may vary based on the specific screw gear system and its operating conditions. Therefore, always refer to the gear manufacturer’s recommendations and guidelines for the most accurate and up-to-date information regarding lubrication requirements.

screw gear

How do you calculate the efficiency of a screw gear?

Calculating the efficiency of a screw gear, also known as a worm gear, involves determining the ratio of input power to output power and considering various factors that affect the overall efficiency of the gear system. Here’s a detailed explanation of how to calculate the efficiency of a screw gear:

  1. Measure Input Power: The first step is to measure or determine the input power to the screw gear system. This can be done by measuring the torque applied to the input shaft and the rotational speed of the input shaft. The input power can then be calculated using the formula: Input Power (Pin) = Torque (Tin) × Angular Speed (ωin).
  2. Measure Output Power: Next, measure or determine the output power of the screw gear system. This can be done by measuring the torque exerted by the output shaft and the rotational speed of the output shaft. The output power can be calculated using the formula: Output Power (Pout) = Torque (Tout) × Angular Speed (ωout).
  3. Calculate Mechanical Efficiency: The mechanical efficiency of the screw gear system is calculated by dividing the output power by the input power and multiplying the result by 100 to express it as a percentage. The formula for mechanical efficiency is: Mechanical Efficiency = (Pout/Pin) × 100%.
  4. Consider Efficiency Factors: It’s important to note that the mechanical efficiency calculated in the previous step represents the ideal efficiency of the screw gear system, assuming perfect conditions. However, several factors can affect the actual efficiency of the system. These factors include friction losses, lubrication efficiency, manufacturing tolerances, and wear. To obtain a more accurate assessment of the overall efficiency, these factors should be considered and accounted for in the calculations.
  5. Account for Friction Losses: Friction losses occur in screw gear systems due to the sliding contact between the worm gear and the worm wheel. To account for friction losses, a correction factor can be applied to the calculated mechanical efficiency. This correction factor is typically determined based on empirical data or manufacturer specifications and is subtracted from the mechanical efficiency to obtain the corrected efficiency.
  6. Consider Lubrication Efficiency: Proper lubrication is essential for reducing friction and improving the efficiency of screw gear systems. In practice, the lubrication efficiency can vary depending on factors such as the type of lubricant used, the lubrication method, and the operating conditions. To account for lubrication efficiency, a lubrication factor can be applied to the corrected efficiency calculated in the previous step. This factor is typically determined based on experience or manufacturer recommendations.
  7. Include Other Efficiency Factors: Depending on the specific application and the characteristics of the screw gear system, additional efficiency factors may need to be considered. These factors can include manufacturing tolerances, gear wear, misalignment, and other losses that can affect the overall efficiency. It’s important to assess these factors and apply appropriate correction factors or adjustments to the efficiency calculation.

By following these steps and considering the various factors that affect the efficiency of a screw gear system, it is possible to calculate a more accurate estimate of the gear’s efficiency. Keep in mind that the calculated efficiency is an approximation, and actual efficiency can vary based on operating conditions, maintenance practices, and other factors specific to the gear system and application.

screw gear

What are the benefits of using a screw gear mechanism?

A screw gear mechanism, also known as a worm gear mechanism, offers several benefits that make it suitable for various applications. Here are some of the key advantages of using a screw gear mechanism:

  • High Gear Reduction Ratio: Screw gears provide a high gear reduction ratio, which allows for significant torque multiplication. This means that a small input torque can produce a much larger output torque, making screw gears ideal for applications that require high torque output and low-speed rotation.
  • Precise Positioning: Screw gears offer precise positioning capabilities due to their fine-pitch threads and high gear reduction ratio. This makes them well-suited for applications that require accurate and controlled motion control, such as robotics, automation, and positioning systems.
  • Self-Locking: One of the notable advantages of screw gears is their self-locking property. The friction between the worm and the worm wheel prevents the backdriving of the system when at rest, eliminating the need for additional braking mechanisms or external locks. This self-locking feature is particularly useful in applications where holding a position is crucial, such as elevators, lifts, and safety mechanisms.
  • Compact Design: Screw gear mechanisms have a compact design, making them suitable for applications with limited space. The worm and worm wheel configuration allows for a compact layout, enabling efficient power transmission in tight spaces where other types of gear mechanisms may not be feasible.
  • Quiet Operation: Screw gears typically operate more quietly compared to other gear types. The meshing of the helical threads results in smooth and gradual contact, reducing noise and vibration. This makes screw gear mechanisms desirable in applications where low noise levels are essential, such as in audio equipment, precision instruments, and residential environments.
  • High Shock Load Resistance: Screw gears are known for their ability to withstand shock loads. The helical nature of the threads and the larger contact area between the worm and the worm wheel distribute the load more evenly, reducing the risk of sudden failures or damage due to shock or impact loads.
  • Reliable and Durable: Screw gears are known for their reliability and durability. The simplicity of their design, with fewer moving parts, results in fewer points of failure. Additionally, the self-locking feature reduces the chances of unwanted movement or slippage. When properly lubricated and maintained, screw gear mechanisms can have a long service life and require minimal maintenance.
  • Versatility: Screw gears can be manufactured in various sizes, materials, and configurations to suit different applications. They can be designed as right-handed or left-handed, with different thread pitches and tooth profiles. This versatility allows for customization and adaptability to meet specific application requirements.

These benefits make screw gear mechanisms a popular choice in industries such as manufacturing, automotive, robotics, elevators, and various other applications where high torque, precise positioning, compactness, and reliability are crucial.

China OEM Factory Direct Screw Conveyor Powder Worm Gear Speed Reducer Gear Box bevel gearboxChina OEM Factory Direct Screw Conveyor Powder Worm Gear Speed Reducer Gear Box bevel gearbox
editor by CX 2023-10-27