China Ball Nut Manufacturers, Suppliers and Factory - Ball Nut Made in China

One-Stop Solution for Your Ball Nut Needs

Zhejiang DLY Automation Manufacturing Co., Ltd. has over 20 years of experience as a ball screw and ball screw nut manufacturer. As an emerging high-tech enterprise, it integrates R&D, production, sales, and service. The company covers an area of over 30,000 square meters and is staffed with a team of experienced professionals in mechanical automation design, manufacturing, inspection, and R&D.

Customized Solutions

We offer tailored solutions to meet your specific requirements. If you have unique demands, we can customize the ball screw nuts according to your specifications, ensuring they perfectly fit your needs.

Free Technical Consultation & Selection Guidance

Whether you need assistance during installation, troubleshooting, or product selection, our expert technical team is always ready to provide timely and detailed guidance. We'll help you choose the perfect ball screw nut for your application.

20+

YEARS EXPERIENCE

200+

ACTIVE MEMBERS

30000+

SQUARE METERS

60+

PATENTS

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What is a Ball nut?

The ball screw nut, as a core component of the ball screw drive system, can achieve precise motion conversion by virtue of its built-in ball structure.The interior of the ball nut is machined with spiral raceways that match the screw. The balls roll cyclically within the raceways, converting rotational motion into linear motion (or vice versa). The balls form a closed circulation loop through a return device (such as a reverser or a conduit), which reduces frictional resistance and improves transmission efficiency.

SFU1204 Nut
SFU1204 Nut is a ball nut designed for a 12 mm diameter, 4 mm lead ball screw, converting rotary motion into smooth, precise linear movement with high efficiency and low friction.
Double Ball Nut
The DLY Double Ball Nut is designed for applications requiring ultra-high precision and smooth linear motion. Its dual nut structure reduces backlash, increases load capacity, and ensures consistent
Waist SFU Nuts
The DLY waist SFU nut is the one kind of ball screw nut. The Waist SFU Nuts adopt the internal circulation mode, and the steel ball follows the full groove of the internal circulation circulator,
Recirculating Ball Nut
As the core component of the ball screw transmission system, the design of the recirculating ball nut directly determines the transmission efficiency and motion accuracy. This component guides the
Ordinary Round Hole SFU Nuts
The DLY Ordinary round hole SFU nut is an important component in a ball screw drive system.. Ordinary round hole SFU nuts are mainly divided into internal circulation structure, single nut design,
SFNU Nuts
SFNU is the model name of ball screw nut by DLY manufacturer, which is commonly used in precision mechanical transmission, such as CNC machine tools, 3D printers, etc. SFNU nut is the one kind of
SFY Nuts
DLY SFY NutsEnd-Caps Circulation1.End cap return design, high speed, low noise, high Dm-N value.2.Unique return design keep the smoothness even with high lead.3.Enhanced dust-proof design.4.Variety
SFA Nuts
The SFA Ball Screw Nut is a single flanged A-type nut with a compact design and smooth ball circulation, providing high rigidity, precision, and reliable performance for CNC machines and automation
SFE Nuts
SFE Nuts are E-type flange ball screw nuts designed for high-precision, smooth, and efficient linear motion in industrial and automation applications.
SFU1605 Ball Screw Nut
1.The DLY 1605 ball nut is a type of ball screw nut with a specific specification, where 16 indicates that the diameter of the ball screw is 16mm, and 05 means that the lead of the nut is 5mm. 2.The
1204 Nut
1204 nut usually refers to the nut in the ball screw nut pair, and 1204 represents some specifications of the ball screw. Different brands and models of 1204 nuts may vary in specific size and
SFS Nuts
SFS nuts are the one type of nuts used for ball screws, usually used in conjunction with ball screws to convert rotary motion into linear motion. The SFS nut adopts the end cover type circulation,

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DLY ball screw nuts advantages

DLY Ball Screw Nuts: Precision in Every Turn, Power in Every Motion.

High Precision

Low Noise

High-Speed

Custom Solutions Available

Various Ball Nuts

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Selection of Ball Nut

When selecting a ball screw nut, it's important to consider several key factors to ensure optimal performance and longevity.

Series

When making selection of series, please take demanded accuracy intended delivery timedimensions( the outside diameter of screw, ratio of lead/ the outside diameter of screw) preloadand etc into consideration.

Circulation type

Selection of circulation type : Please consider the efficiency of screw nut's mounting space.

Number of loop circuits

Performance and service life should be considered when selecting number of loop circuits.

Shape of flanges (FLANGE)

Please make selection based on the available space for the installation of nuts.

Oil hole

Oil holes are provided for the precision ball screws, please use them during machine assembling
and regular furnishing.

Ball Nut Circulation Method

The circulation method of a ball screw nut refers to how the ball bearings move within the nut and return to the ball screw’s thread.

Internal Ball Circulation Nuts

Feature of Ball Screw-Internal Return Series

Internal return design saves more space.
Small driving torque
High accuracy guaranteed.
Fine feed
No backlash, High rigidity.

Application:

For delicate application in industrial application, machine tool and automation application.

End-Caps Circulation Series

Feature of Ball Screw End Cap Return High Speed Series

End cap return design, high speed, low noise, high Dm-N value.
Unique return design keep the smoothness even with high lead.
Enhanced dust-proof design.
Variety of selection in diameter and leads.
No backlash, high rigidity.

Application:

For high speed application, CNC milling, precision application, factory automation and medical industry.

External Ball Circulation Nuts

Feature of Ball Screw External Return Heavy Load Series

External return heavy load design, a better solution for heavy load and high speed.
Low noise design.
No backlash, high rigidity.

Application:

High speed industrial, Precision machine tool, CNC application and electronic application.

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how do i install a ball nut on the screw

Without the guidance of experience, we recommend ordering the ball nut together with a ball screw

1.Carefully remove the protective band and make sure the mandrel does not slip off.

2. Press one end of the mandrel upon one of the ball screw ends all while holding the ball nut securely.

3.Slowly screw in the ball nut onto the ball screw. The safety mandrel must be securely pressed against the screw end until the ball nut is entirely mounted.

4.Once you ensure the ball nut is fully inserted, remove and safely store the mandrel for later use. The mandrel may come in handy when future disassembly is needed.

Advantages of ball nut

The core advantages of ball nuts are concentrated in aspects such as transmission efficiency, precision control, and reliability.

High-efficiency transmission performance

Extremely low friction loss: By replacing sliding friction with cyclic rolling of balls, the transmission efficiency is as high as over 90%, significantly reducing energy consumption (the efficiency of traditional lead screws is only 30%-40%).

Motion stability: Rolling friction eliminates the "crawling" phenomenon during low-speed movement, ensuring speed stability.

Precision control capability

Micron-level positioning accuracy: The low-friction characteristic reduces deformation errors, and the preloading structure can eliminate backlash, achieving high repeat positioning accuracy.

High transmission rigidity: The elastic deformation characteristics of the balls enhance the rigidity of the system, resulting in small displacement errors under load.

Ball Nut Inspection Image

Ball Nut Assortment Photo

Excellent durability and reliability

Ultra-long service life: The hardened steel material (such as bearing steel) and rolling friction design greatly reduce wear, with a service life of up to millions of cycles.

Excellent temperature rise control: Low friction generates less heat, reducing the impact of thermal deformation on accuracy.

Advantages of special functions

Bidirectional transmission reversibility: Supports free conversion between rotational motion and linear motion.

Compact structure adaptability: Especially the internal circulation design saves space, suitable for precision equipment such as industrial robots.

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Nominal Code Of Ball Nut

Ball Nut Model Codes Explained: Diameter, Lead, Accuracy and More

The nominal codes (model designations) of ball nuts are usually composed of brand-specific custom rules, with core elements including parameters such as structural type, preloading method, nominal diameter, and lead. There are differences in the specific designation rules among different brands.The following is an example.

Nominal Diameter

The millimeter value of the screw outer diameter (e.g., 20, 25), which directly affects the load capacity—the larger the diameter, the stronger the load-bearing capacity.

It is usually indicated directly by numbers in marking (example: 20 represents a diameter of 20mm).

Lead

The linear distance the nut moves when the screw rotates one full revolution (unit: mm). For example, 05 indicates a 5mm lead.

Structural Type

Circulation Mode: Internal circulation (reverser steering), external circulation (intubation return).

Code examples: F (flange type), M (embedded intubation), D (double nut).

Preloading Method: Gasket preloading (D), double-nut preloading (DF), etc.

Accuracy Class

Expressed by a combination of letters and numbers, such as C0~C10, G1~G5 (ISO standard).

The higher the class (e.g., G1), the smaller the lead error (±6μm/300mm).

Helix direction

R (right-hand thread, omitted by default) / L (left-hand thread).

Preload level

For example, C3 indicates medium preload, which affects rigidity and eliminates backlash.

Applications Of Ball Nut

High-precision positioning equipment

CNC Machine Tools

Tool feeding system: Controls the vertical movement of milling machine tools and the feeding motion of lathes, achieving micron-level repeat positioning (±6μm/300mm) to improve machining accuracy and surface quality.

High-speed cutting: High efficiency (transmission efficiency of 90%-98%) supports high-speed feeding, and rotating ball nut meet the requirements of high-speed machining centers.

Semiconductor Manufacturing Equipment

Wafer positioning in lithography machines: rotating ball nut ensure nanometer-level positioning accuracy during chip lithography, reducing lithography errors.

Packaging equipment: Precisely controls the position of chip packaging to improve the yield rate.

Automation and robotics field

Industrial Robots

Joint drive: Realizes high-rigidity linear motion at the joints of robotic arms, improving motion stability and repeat positioning accuracy.

End effector: The gripper outputs high clamping force by virtue of low friction characteristics, and precision ball nut are suitable for welding, assembly and other scenarios.

Automated Production Lines

Precision assembly lines: Precisely transport and position parts in the assembly of electronic/automotive components, reducing manual errors.

AGV lifting mechanism: precision ball nut control the lifting of forks of warehouse robots, and the lightweight design optimizes power efficiency.

Applications in special industries

Aerospace

Flight control systems: For satellite attitude adjustment and precise displacement control of avionics equipment, recirculating ball screw and nut meet the reliability requirements in extreme environments.

Medical Equipment

Imaging equipment: Smooth linear movement of CT/MRI scanning beds, with recirculating ball screw and nut ensuring imaging clarity.

Surgical robots: High-precision motion control of minimally invasive surgical instruments.

New Energy Vehicles

Battery production lines: Precise assembly and inspection positioning of power battery modules.

Electric drive systems: Precision adjustment mechanisms for motor shafts.

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FAQ

Q: What is a recirculating ball screw and nut?

A: A recirculating ball screw and nut is a mechanical component used in. precision machinery to convert rotational motion into linear. motion. it consists of a screw shaft and a nut, with ball bearings. positioned between them.

Q: What is the purpose of recirculating ball screw and nut mechanism in CNC machine?

A: Ball screw nut recirculation systems are critical components in various precision machinery and automation applications where efficient linear motion is essential. A ball screw plays a vital role in converting rotary motion into linear motion with high precision and minimal friction

Q: What is the difference between a precision ball nut and a linear ball screw?

A: All Ball Screws are roll formed of quality high carbon or alloy steel. Screws are induction case hardened for maximum load and service life. Nuts are made from carburizing grades of carbon or alloy steel and case hardened for wear resistance. High grade, bearing quality chrome steel balls are utilized.

Q: What is the difference between ball screw and ball spline?

A: The support bearing on the Ball Screw has a contact angle of 60° in the axial direction while that on the Ball Spline has a contact angle of 30° in the moment direction, providing a highly rigid shaft support.

Q: What is the function of the recirculating ball screw and nut?

A: The balls serve to reduce friction and wear in the gear, and reduce slop. Slop, when the gears come out of contact with each other, would be felt when changing the direction of the steering wheel, causing the wheel to feel loose.

Q: What is an SFE nut?

A: SFE nut are a specific type of nut in ball screw systems, mainly used for high-precision mechanical transmission.

Q: What are the common models of SFE nut?

A: Common models include SFE1616, SFE2020, SFE2525, etc.

Q: What is the working principle of the SFE nut?

A: When the ball screw rotates as the driving element, the SFE nut will convert into linear motion according to the lead of the corresponding specification following the rotation angle of the screw. The driven workpiece can be connected to the nut through the nut seat to further achieve linear motion. In addition, the SFE series nuts can be preloaded, which can make the axial clearance reach a negative value, thereby enhancing the rigidity of the nut part.

Q: What are the application fields of SFE nut?

A: Due to its characteristics such as high precision and high speed, it is widely used in fields with high requirements for transmission accuracy, such as automation equipment, robots, CNC machine tools, and medical equipment.

Q: What are the material and performance of the SFE nut??

A: It is usually made of high-strength steel, with its surface undergoing special treatment. It features strong stability under high load, good wear resistance, excellent corrosion resistance and other characteristics, which can ensure a long service life.

Q: What is a screw SFY nut?

A: SFY nut, in technology, fastening device consisting of a square or hexagonal block, usually of metal, with a hole in the centre having internal, or female, threads that fit on the male threads of an associated bolt or screw. A bolt or screw with a nut is widely used for fastening machine and structural components.

Q: How to remove a screw SFY nut?

A: Most standard screws, bolts or nuts are unscrewed by turning them anti-clockwise.

Q: How to remove a rusty screw and SFY nut?

A: Begin by applying a high-quality penetrating oil to the stuck bolt.

Q: What is the difference between a flange nut and a normal nut?

A: A flange nut has a built-in wide base (the flange) that helps spread the load across a larger surface area. This reduces the risk of damage to the connected parts and increases the nut's holding strength, especially on softer materials.

Q: What are your products?

A: screw, nut, square rail, slider, optical axis, aluminum and other products.

Q: How to check the quality of SFY nut?

A: Comprehensively check the quality of SFY nuts from multiple aspects including appearance, dimensional accuracy, material, performance, and assembly adaptability.

Q: What products do you have expect Ball nut?

A: We mainly have linear guide, ball screw, linear shaft and bearings. For ball screw and linear shaft,we can provide ends maching according to our standard drawings or your drawings.

Q: What is a precision ball nut?

A: A precision ball nut is a high-precision mechanical transmission component that cooperates with a ball screw, converting rotational motion into linear motion (or vice versa) with high precision through the rolling of balls.

Q: What is a SFU ball screw?

A: TBI SFU type ballscrew is belong to Internal Return Series have ground and rolled series,it widely used in industrial area. Feature： 1. Space saving nternal circulate design.

Q: What is the purpose of ball screws?

A: Ball screws are an essential component in many modern-day manufacturing systems. They provide a highly efficient means of converting rotary motion into linear motion with minimal friction, making them an indispensable component of many industrial and high-tech applications.

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Send us your specifications or drawing today — our engineering team will provide quick confirmation and a tailored quotation. Whether it’s a standard model or a custom ball screw, we’re here to support your business with precision, speed, and reliability.

Our address

No. 12, Baixian Road, Shuige Industrial Zone, Lishui, Zhejiang, China

Phone Number

+8618957070963

+86-578-2959520

E-mail

export@dlybearing.com

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Zhejiang DLY Automation Manufacturing Co., Ltd. is well-known as one of the leading ball nut manufacturers and suppliers in China. Please feel free to buy high quality ball nut made in China here and get pricelist from our factory. For customized service and OEM/ODM service, contact us now.