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Lead Screws, Ball Screws. Boost precision, and optimize performance. Our efficient solutions meet all your industrial needs. Rapid customization, and long-lasting durability, empower your business for precise control and cost optimization.

Lead screws, or drive screws, both are ingenious mechanisms, that turn rotation into straight-line action. They consist of two main parts: the screw shaft (or lead screw) and the nut. As the lead screws spin, the nut glides along, making things move straight. The design of lead screws allows them to withstand high loads while providing smooth, precise motion control.


Categories of lead screws

By Manufacturing Method:

  • Machined Screws: Manufactured through cutting processes, allowing for custom pitch and shape. They are typically used for specialized applications and can be customized as per requirements.
  • Rolled Screws: Manufactured through rolling processes, offering superior precision and surface finish. Well-suited for tasks demanding accuracy and frequent placement adjustments.

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By Thread Shape:

  • Square Thread Screws: Possess high static and dynamic load capacities, but with relatively higher friction coefficients, suitable for low-speed or adjustment applications.
  • Trapezoidal Thread Screws: Combine the high load capacity of square threads with lower friction coefficients, suitable for various applications.
  • ACME Thread Screws: A special type of trapezoidal thread commonly used in North America. Feature good load-bearing capacity and self-locking characteristics, suitable for various mechanical designs.

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By Performance Characteristics:

  • Self-locking Screws: Due to their thread design, they have self-locking capabilities. This means the nut won't slide due to gravity without external force, suitable for applications requiring stable positioning.
  • Non-self-locking Screws: These screw designs are used in applications requiring continuous smooth motion, lacking self-locking characteristics. Suitable for situations requiring frequent movement.

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By Material Types:

  • Carbon Steel Screws: Commonly used for standard applications, providing good strength and economy.
  • Stainless Steel Screws: Suitable for applications requiring corrosion resistance or sanitary conditions, such as food processing and medical equipment.
  • Alloy Steel Screws: Used for high-load or special environmental applications, providing additional strength and durability.

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Spec ranges of lead screws


Ranging from micro lead screws as small as 2.00mm to heavy-duty ones with diameters up to 50.00mm or larger. Diameter affects the load capacity and rigidity of the lead screw.


Varying from 0.50mm to 20.00mm or more. Pitch influences the displacement per rotation and the efficiency of force conversion. With smaller pitches suitable for high-precision positioning and larger pitches for rapid movement.

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Customizable from a few millimeters to several meters, depending on application requirements. Determined by installation space and travel needs.


Options include carbon steel, stainless steel, alloy steel, aluminum, and copper alloys. The choice depends on environmental factors, such as corrosion resistance needs, load requirements, and cost considerations.

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Static and dynamic load capacity:

Ranging from tens of newtons to several thousand newtons or higher. Depending on the maximum load the lead screw needs to bear in the application.

Accuracy grade:

Classified into general, high precision, and ultra-high precision grades. Higher accuracy grades imply fewer manufacturing tolerances, suitable for precision control applications with strict requirements.

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Rotational precision:

Variation in every 300.00mm can vary from a few to several tens of micrometers. Directly affects positioning accuracy, crucial based on the application's precision requirements.

Self-locking capability:

Some lead screws with smaller pitches possess self-locking features, capable of maintaining position without driving force. Determined by whether additional braking or holding mechanisms are needed.

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Advantages of lead screws

High Precision and Repeatable Positioning Capability:

Ensures precise positioning tasks for machinery or systems, vital for elevating product quality and streamlining production processes.

High Load Capacity:

Able to withstand high loads without deformation, suitable for various heavy-duty applications including industrial machinery and automation equipment.

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Excellent Wear Resistance and Extended Lifespan:

Reduces maintenance needs and frequency of replacements, lowering long-term operational costs.

Self-locking Characteristics:

In some applications, the lead screw's self-locking ability can provide additional safety, reducing the need for extra braking mechanisms.

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Ease of Maintenance:

Simple design, easy installation, and maintenance minimize downtime and maintenance expenses.


Compared to other linear motion solutions, lead screws offer an economically efficient way, especially suitable for projects with limited budgets.

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Customization Capability:

Can customize lead screw length, diameter, pitch, etc., according to specific application needs, providing the optimal solution for projects.

Diverse Material Selection:

Stainless steel, carbon steel, etc., can be chosen based on application environment and performance requirements.

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Environmental Adaptability:

Designed to adapt to various environments, including extreme temperatures, dry or humid conditions, and even polluted and corrosive environments.


Compatible with control systems, stepper motors, and servo motors, increasing system compatibility and flexibility.

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Valued clients of lead screws

Mechanical Design and Manufacturing:

Precision, durability, self-locking capability. Used in CNC machines, automated assembly lines, printing machinery, etc.

Automation and Control Systems:

Repeated positioning accuracy, long-term stability, and compatibility. Used in robotic arms, automated material handling, precision positioning systems, etc.

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Medical Equipment Manufacturers:

High precision, quiet operation, clean, and non-contaminating materials. Used in medical diagnostic equipment, laboratory automation, adjustment mechanisms for medical beds and devices, etc.

Aerospace Industry:

High strength, high reliability, withstand extreme environments. Used in satellite positioning systems, aircraft component adjustments, space station robotic arms, etc.

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Automotive Manufacturing:

Cost-effectiveness, durability, customization capability. Used in assembly line automation equipment, adjustment and testing devices for automotive components, etc.

Construction and Engineering Equipment:

Load-bearing capacity, corrosion resistance, and easy maintenance. Used in construction machinery, lifting platforms, automatic door systems, etc.

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Energy Industry:

High-temperature resistance, wear resistance, and long-term stability. Used in wind turbine mechanical adjustments, oil drilling equipment, solar tracking systems, etc.

Office Automation and Electronics for Consumers:

Miniaturization, quiet operation, precise control. Used in printers, copiers, scanners, etc.

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Benefits of lead screws to clients

Enhancing Accuracy and Reliability:

Lead screws provide precise linear motion, crucial for applications requiring fine positioning and operations like CNC machines, medical equipment, etc. High reliability ensures stable equipment operation, reducing failure rates and maintenance costs.


Compared to ball screws for linear drive solutions, lead screws typically offer a more economical choice. Especially in applications where extremely high speed or ultra-high precision isn't required. This helps customers meet performance requirements while controlling costs.

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Easy Maintenance:

Lead screws are simple in design, durable, and easier to maintain and clean compared to ball screw systems requiring regular lubrication. This reduces equipment downtime and maintenance costs. Especially in environments where frequent maintenance is challenging.

Customization Capability:

Lead screws can be customized based on application needs, including length, diameter, pitch, and materials, providing high flexibility. This enables customers to obtain components perfectly matched to their machinery and equipment, optimizing performance and efficiency.

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Expanded Application Fields:

With its high adaptability and customization, lead screws can meet the needs of various industries and applications. From industrial manufacturing to medical equipment, and aerospace. This enables customers to serve a broader market and customer base with the same type of components.

Environmental Protection and Safety:

Lead screws produce low noise during operation, and their lack of lubrication reduces potential pollution risks. Making them suitable for applications requiring clean and quiet environments, such as laboratory equipment and medical devices.

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Enhancing Competitiveness:

By using efficient, reliable, and cost-effective lead screws, customers can improve the performance and quality of their products. Gaining a competitive edge in the market, Bringing in more clients, and increasing market dominance.

Customer feedback on lead screws

Automated Assembly Line

  • Case: The customer is a factory specializing in producing precision electronic devices. Our lead screws are utilized on automated assembly lines to ensure precise positioning and stable movement of components. These assembly lines require high levels of precision and repeatability to guarantee the quality of the produced products.
  • Senior Operation Manager: "The use of Johoty's lead screws on our automated assembly lines has achieved high accuracy and efficiency. The precise control they provide enhances both the production quality and output. Additionally, due to their reliability, we can reduce equipment failures and maintenance time, which is crucial for maintaining production efficiency."

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3D Printer

  • Case: The customer is a 3D Printing manufacturer. They adopt our lead screws as the primary driving component for their printers. It is to ensure smooth and precise movement of the print head. Precise control of the print head's position is vital for achieving excellent printing quality.
  • CTO’s comments: "Johoty's lead screws in our 3D printers enhance printing accuracy and layering, resulting in model quality far exceeding expectations. the lead screw means less vibration and noise, which is something we highly prioritize when selecting driving components. End users are extremely satisfied with the details and quality of the printed models. This directly reflects in the market performance of our products. Thanks, Johoty"

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Medical Equipment

  • Case: The Brazilian client is a medical equipment manufacturer. They incorporate lead screws into their latest diagnostic instruments. Which requires extremely high positioning accuracy to ensure the accuracy and reliability of patient detection. Lead screws play a crucial role in these devices, controlling the precise movement of the scanner.
  • R&D manager: "Our diagnostic equipment relies on the lead screw to achieve high-precision scanning and positioning. Which is essential for providing accurate medical diagnoses. The reliability and precision of Johoty's lead screws ensure the high performance of the equipment. Reducing maintenance requirements while increasing the accuracy of patient diagnoses. Medical professionals have given high praise for this, believing it significantly improves the quality and efficiency of the diagnostic process."

Applications of lead screws

3D Printer:

Lead screws are used in 3D printers to precisely control the positions of the print head and the print bed. Ensuring printing accuracy and layering.

CNC Machine Tools:

In CNC machine tools, the lead screw is utilized to achieve high-precision tool position control. Serving as a key component for precision machining.

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Healthcare Equipment:

In the healthcare equipment, including MRI machines and CT scanners. The lead screw is employed to accurately move the scanning equipment, ensuring patient safety and image quality.


In the aerospace field, lead screws are used for critical applications. Such as adjusting aircraft wing surfaces and positioning satellite antennas, demanding high reliability and precision.

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Lead screws are utilized in industrial robots and service robots to precisely control the movement of mechanical arms. Enabling complex operations and tasks.

Automated Production Lines:

In automated assembly and production lines, the lead screw is used for conveyor positioning, component installation, and precise product movement. Enhancing production efficiency and product quality.

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Optical and Microscope Equipment:

Lead screws are used in high-precision optical equipment and microscopes for fine adjustments of focus and sample positioning. Crucial for research and material analysis.

Electric Vehicles:

In electric vehicles, the lead screw can be used to adjust the positions of seats, windows, and other movable parts. Providing a comfortable user experience.

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Solar Tracking Systems:

Lead screws adjust solar panel angles in tracking systems. Maximize solar capture and energy efficiency.

Valve Control:

In the chemical and energy industries, the lead screw is used for precise control of valve opening and closing. It's crucial for overseeing processes and maintaining safety standards.

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Lead screws usually referred to as ACME screws, convert motion through direct friction. While ball screws reduce friction by using ball bearings, enhancing efficiency.Lead screws are suitable for low-speed, low-load, and low to medium-precision applications with lower costs. Ball screws are suitable for high-speed, high-load, and high-precision applications, but with higher costs.
When selecting lead screws, one needs to consider the application's load, speed, stroke length, precision requirements, and expected lifespan. The choice of specific specifications should also keep in mind space and budget limitations during installation.Typically, our selection tools and professional advice can aid in identifying the best specifications.
The lifespan of lead screws is typically predicted based on the expected number of strokes or total stroke distance. Adjusting according to load, speed, and lubrication. We usually provide lifespan calculation formulas or software tools to estimate lifespan under specific conditions.


Lead screws require regular lubrication to maintain optimal performance and extend lifespan. The frequency and type of lubrication, such as oil or grease, depend on the application's load, speed, and environmental conditions. We typically provide specific lubrication guidelines.
Backlash is the difference between the actual movement distance and the theoretical movement distance when they rotate at an angle. This directly affects the accuracy of the lead screw system. In high-precision applications, choosing lead screws with low backlash is crucial.
Noise in lead screws is typically caused by improper assembly, misalignment, or inadequate lubrication. Ensuring proper installation and regular lubrication is key to reducing noise.Selecting appropriate lead screws and nut combinations during the design phase, and using damping materials, can also help reduce noise.
Yes, lead screws can be used in vertical applications, but measures to prevent back driving need to be considered. This may involve using brakes or specific thread designs to improve self-locking capability.
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