China Good quality OEM Custom Stainless Steel CNC Machining Automatic Lathe Turning Threading Medical Equipment Worm Gear Screws Shaft with Hot selling

Product Description


Our service

Our service

Lead Time

Quantity (pieces) 1 – 10 11 – 500 501 – 10000 > 10000
Lead time (days) 3 7 10 To be negotiated


DaAo Quality Promise

1.Material cetifications available.
2.Inspection reports included with every order.
3.ISO 9001certified,ITAF 16949 certified & EN15085 certified
4.Quality guaranteed.For materials with a quantity exceeding 100 pieces,we will conduct random inspections at a rate of 10%.

  Metal,Aluminum,Copper and Stainless steel Other plastic
Linear  Dimension +/- 0.01mm
+/- 0.0003 inch
+/- 0.03mm
+/- 0.002 inch
Hole Diameters +/- 0.008mm
+/- 0.0003 inch
+/- 0.03mm
+/- 0.002 inch
Shaft Diameters +/- 0.004mm
+/- 0.00016 inch
+/- 0.05mm
+/- 0.002 inch


Product Parameters

Product Parameters

Sketch Explanatory note


 Carbon steel, Stainless steel, Aluminum, Aluminum alloy, Copper alloy, Galvanized steel sheet, Magnesium alloy, 
Titanium alloy, Special materials, Engineering Plastics… Or Customized 


 Milling, Turning, Drilling, Planing, Fitter, Boring, Grinding, CNC machining, Broaching, Grinding and Honing 

Heat Treatment

 Normalizing, Annealing, Tempered, Aging, Tempering, Quenching 

Special Processing

 EDM, Wire EDM, Electrochemical machining, Laser processing 


Polishing, Sandblasting, Zinc plating, Tin plating, Nickel plating, Gold plating, Silver plating, Copper plating, 
Alloy plating and Spraying (Painting and powder spraying), Anodizing and electrophoresis, etc. 

Equipment Support

pentahedron gantry, CNC Machining Center(MAZAK), Gantry Machining Center,
CNC Turning Milling Compound Machining Center(DMG),CNC Lathe (MAZAK), Wire cutting,CNC milling machine,
drilling machine etc

Technological Design

Process analysis and review of product drawings; Draw up a processing plan; Compile process specification 
and design and manufacture of process equipment


OEM Service Tight Tolerance Custom Design Precision CNC Machining Parts


 +/-0.002mm, 100% QC quality inspection before delivery, can provide quality inspection form testing equipment 


 Polishing, Sandblasting, Zinc plating, Tin plating, Nickel plating, Gold plating, Silver plating, Copper plating, 
Alloy plating and Spraying (Painting and powder spraying), Anodizing and electrophoresis, etc. 


 ISO 9001, IATF 16949, EN 15085,ISO/TS22163 

Testing Equipment

 CMM , Roundness Meter , Tensile Tester, Profilometer , Altimeters , Hardness Tester , Microscope, 
Marble Platform, etc. 

Lead Time



Product Description

Product Description




Quality control


Our Advantages


Why HangZhou Daao? You are our next partner!

1. 15 years of experience in precision machining and casting, forging  for European and U.S. markets.

2. OEM & ODM products range: Train parts,Engineering Plant parts, Aircraft parts,Machinery Parts, Auto parts, Truck Parts, Engine parts, Agriculture equipment parts, Wind power generation accessories, Hardware, etc.

3. Processing technology: Milling, Turning, Drilling, Planing, Fitter, Boring, Grinding, CNC machining, Broaching, Grinding and Honing

4. Material Standard: ISO, GB, ASTM , AISI , DIN , BS, JIS.

5. Machining equipment: Equipment Support    pentahedron gantry, CNC Machining Center(MAZAK), Gantry Machining Center,CNC Turning Milling Compound Machining Center(DMG),CNC Lathe (MAZAK), Wire cutting,CNC milling machine,drilling machine etc,More than 100 devices, maximizing customer production capacity and delivery time

6. Test equipment: Optical Spectrum Analyzer, CMM, Hardness test equipment, Tensile test machine;

7. Surface treatment:  Polishing, Sandblasting, Zinc plating, Tin plating, Nickel plating, Gold plating, Silver plating, Copper plating, Alloy plating and Spraying (Painting and powder spraying), Anodizing and electrophoresis, etc.

8.Heat Treatment     Normalizing, Annealing, Tempered, Aging, Tempering, Quenching



 Our company has system certifications such as ISO 9001, IATF 16949, ISO/TS22163, ISO13485, EN 15085, ISO14001, etc. Quality is considered a core value in our company. We ensure that every link and step meets the highest standards through strict quality control. We adopt advanced production technology and equipment, strictly screen raw materials, and closely monitor the production process to ensure the quality of the final product.
    In order to ensure the performance and quality of our products, we have established a comprehensive testing system. There are strict testing standards and procedures at every stage from raw material storage to product delivery. Our professional testing team uses advanced testing equipment and methods to comprehensively test the performance indicators of our products, ensuring that each product meets the requirements.
    We always pay attention to the needs and feedback of our customers, and provide them with high-quality customer service. Our sales and technical team provides customized solutions based on customer feedback to meet their special needs. At the same time, we also provide timely after-sales service and technical support to ensure customer satisfaction


Our Partners

Our partners

Our Customer

Packaging & Shipping



1. Q: How about the quality of your product?                                                     
 A: 100% inspection during production.         
 2. Q: What kinds of machining service do you have?                                                     
 A: Gringing, Machining, CNC milling and turning,CNC milling, CNC                                                    
 metal, grinding, stamping, casting and forging parts, assembly service.                                     
 3. Q: What material of the product can you supply?                                                     
 A: Carbon Steel, Alloy Steel, Stainless Steel, Brass, Copper or according to your requirement.                  
4. Q: What’s the delivery time?                                                     
A: For products in stock, within 5-7 days after receiving your payment. For custom order, about 20-35 days after confirmed every details.       

5.How to order High Precision OEM and Customized Machining Parts for Industrial Machinery ?                                                     
* You send us drawing or sample                                                    
* We carry through project assessment                                                    
* We give you a design                                                    
* You think the design is ok                                                    
* We make the sample and send it to you                                                    
* You think the sample is good then place an order and pay us 30% deposit                                                    
* We start to make the product                                                    

If there’s anything we can help, please feel free to contact with us.                                                    
We’re sure your any inquiry or requirement will get prompt attention.
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After-sales Service: Replace The Product
Warranty: One Year or Negotiation
Condition: Used
Certification: CE, RoHS, GS, ISO9001
Customized: Customized
US$ 10/Piece
1 Piece(Min.Order)

Request Sample



Customized Request

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

What are the potential challenges in designing and manufacturing screw gears?

Designing and manufacturing screw gears, also known as worm gears, can present several challenges that need to be addressed to ensure the successful production of high-quality gear systems. Here’s a detailed explanation of the potential challenges in designing and manufacturing screw gears:

  • Complex Geometry: Screw gears have complex tooth profiles and geometry, which can pose challenges during the design and manufacturing processes. The design must consider factors such as the helix angle, lead angle, and tooth shape to ensure proper gear engagement and efficient power transmission. Manufacturing these intricate geometries accurately can be technically demanding.
  • Manufacturing Tolerances: Achieving tight manufacturing tolerances is crucial for the proper functioning of screw gears. The gear components need to be precisely machined to ensure accurate tooth profiles, pitch, and concentricity. Maintaining these tight tolerances throughout the production process can be challenging, especially when working with materials that have dimensional variations or when scaling up production.
  • Machining and Grinding: The machining and grinding processes involved in manufacturing screw gears require specialized equipment and expertise. The use of multi-axis CNC machines, gear hobbing, or grinding machines is often necessary to achieve the required tooth profiles and surface finishes. These processes can be time-consuming and costly, requiring skilled operators and careful process control to ensure accurate and repeatable results.
  • Material Selection: Choosing the right materials for screw gears is critical to ensure durability, wear resistance, and efficient power transmission. Factors such as hardness, strength, and compatibility with lubricants must be considered. Selecting suitable materials that meet the specific application requirements can be challenging, particularly when balancing cost, performance, and manufacturing constraints.
  • Lubrication and Heat Dissipation: Screw gears require proper lubrication to reduce friction, wear, and heat generation. Designing effective lubrication systems and ensuring proper lubricant selection and distribution can be challenging. Heat dissipation is also a concern, especially in high-speed or high-torque applications, as excessive heat can affect gear performance and longevity. Adequate cooling methods or heat dissipation strategies may need to be implemented.
  • Backlash and Efficiency: Screw gears inherently exhibit some level of backlash due to the nature of their tooth engagement. Managing and minimizing backlash can be a challenge, as it affects the precision and accuracy of the gear system. Additionally, screw gears generally have lower mechanical efficiency compared to other gear types, which can be a concern in applications where efficiency is critical. Designing for improved efficiency and mitigating backlash can require careful consideration of gear parameters and materials.
  • Noise and Vibration: Screw gears can generate noise and vibration during operation, which can be undesirable in many applications. Designing for reduced noise and vibration requires careful consideration of gear tooth profiles, surface finishes, and lubrication. Balancing gear parameters and implementing vibration-damping measures can help mitigate noise and vibration issues, but it can be a complex task that requires extensive testing and iterative design improvements.
  • Cost and Manufacturing Scalability: Designing and manufacturing screw gears can be costly, especially when precision machining, specialized equipment, and skilled labor are involved. The cost of materials, heat treatment, and surface finishing processes can also contribute to the overall production cost. Additionally, scaling up production while maintaining consistent quality and meeting cost targets can pose challenges that require careful planning and optimization.

Addressing these challenges requires a combination of engineering expertise, advanced manufacturing techniques, and rigorous quality control. By carefully considering these factors during the design and manufacturing phases, it is possible to overcome the challenges and produce screw gears that meet the required performance, durability, and reliability standards.

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 Good quality OEM Custom Stainless Steel CNC Machining Automatic Lathe Turning Threading Medical Equipment Worm Gear Screws Shaft with Hot sellingChina Good quality OEM Custom Stainless Steel CNC Machining Automatic Lathe Turning Threading Medical Equipment Worm Gear Screws Shaft with Hot selling
editor by CX 2024-03-26


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Manufacturer supplier exporter of bush chains

We specializing in the production of Agricultural Gearbox, PTO Shafts, Sprockets, Fluid Coupling, Worm Gear Reducers, Gears and racks, Roller Chains, Sheave and Pulleys, Planetary Gearboxes, Timing Pulleys, Shaft Collars and more.

We have exported our products to clients around the world and earned a good reputation because of our superior product quality and after-sales service.

We warmly welcome customers both at home and abroad to contact us to negotiate business, exchange information and cooperate with us.