Precision Ball Screws for CNC, Automation, and Industrial Machinery
Ball screws are mechanical components that convert rotational motion into linear motion using ball screw balls. The ball screw shaft and ball screw nut work together with the balls to achieve high precision and smooth motion.
Compared to traditional ACME screws (trapezoidal threads with a 29° flank angle and larger pitch, often used for frequent positioning and high axial loads at low speeds), ball screws are more precise, more durable, and operate more smoothly. They also offer better environmental performance.
Ball screws can serve as the core component in linear actuators, providing high-precision, reliable motion for automation systems.
Types of Linear Ball Screws
As one of China's leading ball screw manufacturers, we offer a wide range of precision ball screws
for various industrial applications. Below are our main ball screw series.
Internal Circulation Ball Screws
An internal circulation ball screw is a high-precision linear transmission component. The balls stay in contact with the screw shaft and are guided by a recirculator (reverser) back to the adjacent raceway, ensuring smooth, continuous motion. This design reduces friction and drive torque while maintaining high precision, making it ideal for space-constrained machinery such as machine tools, industrial equipment, and automation systems.
- • Internal recirculation design saves installation space.
- • Low drive torque, only one-third of a conventional sliding screw.
- • High precision for reliable motion.
- • Ultra-fine micro-feeding, with accuracy up to 0.1 μm.
- • Backlash-free, high rigidity ensures stable, smooth operation under load.
End-Caps Circulation Ball Screws
End-cap recirculation is a type of external circulation. In this design, end caps at both ends of the nut guide the balls through longitudinal return holes into the return tube, completing the recirculation loop. Thanks to ball screw efficiency and stability, it is widely used in high-speed and CNC machine tools, precision machinery, electronics manufacturing equipment, and medical devices.
- • End-cap design for high-speed, low-noise performance with excellent Dm-N ratings.
- • Optimized recirculation ensures smooth motion at high leads.
- • Patented dustproof system for enhanced protection and durability.
- • Wide range of sizes and leads for flexible applications.
- • Zero backlash and high rigidity for precise, stable operation.
Miniature Ball Screws
Miniature ball screws use an internal recirculation design with a compact, lightweight nut, enabling high-precision transmission in confined spaces. They offer excellent positioning accuracy, making them ideal for small-lead applications (1–2 mm) that require precise feed control. These screws are widely used in precision machinery, electronics manufacturing, and medical devices, providing reliable performance in space-limited installations.
Non-Flanged Ball Screws
Non-flanged ball screws feature a space-saving design with zero backlash and high rigidity, which makes them especially suitable for machines with limited internal space. Within this series, the SCI models are optimized for small-diameter screws, while the BSH models offer the flexibility for customers to attach flanges as needed. Thanks to these features, these screws are widely used in general machine tools, industrial machinery, and automation equipment.
JSM Ball Screw Series
JSM ball screws convert rotary motion into linear motion through a spiral mechanism for precise positioning or cutting motion.
Our products mainly include internal circulation series, end-caps circulation series, miniature series and other types.
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![Zero Backlash Ball Screw]()
BSHZero Backlash Ball ScrewCylindrical Flangeless Nuts Design -
![Miniature Ball Screw]()
SFKMiniature Ball ScrewK-type single nut flange design -
![High Speed Silent Ball Screw]()
SFHHigh Speed Silent Ball ScrewH-type Single Nut Flange Design -
![High Speed Reinforced Dust-proof Ball Screw]()
SFYRHigh Speed Reinforced Dust-proof Ball ScrewY-type single nut flange design -
![Small Ball Screw]()
SFSSmall Ball ScrewS-type Single Nut Flange Design -
![High Speed Ball Screw]()
SFAHigh Speed Ball ScrewA-type single nut flange design -
![High Lead Ball Screw]()
SFEHigh Lead Ball ScrewE-type Single Nut Flange -
![Double Nut Ball Screw]()
DFUDouble Nut Ball ScrewDin-standard Double Nut Flange Design -
![Small Nut Ball Screw]()
SFUSmall Nut Ball ScrewDIN-standard single nut flange design -
![Recirculating Ball Screw]()
SFIRecirculating Ball ScrewI-type Single Nut Flange Design
Why Are Our Ball Screws Superior?
Our ball screws, used in conjunction with linear guides, are essential transmission components in a variety of linear motion solutions. They offer versatile circulation options, including internal and end-cap recirculation, to meet diverse customer requirements.
Building on these advantages, our ball screws excel in two key areas: smooth rolling action, which ensures precise and stable linear motion, and a backlash-free, high-rigidity design, providing reliable performance under heavy loads and high-speed operation.
Smooth Rolling Motion
Backlash-Free, High Rigidity Design
Technical Data of Ball Screws
SFS (DIN69051 Form B) Ball Screws
DFS (DIN 69051Form B) Ball Screws
SFA Ball Screws
SFNU (DIN69051 Form B) Ball Screws
SFU (DIN69051 Form B ) Ball Screws
DFU (DIN69051 Form B) Ball Screws
SFK Ball Screws
SFNl Ball Screws
SFl Ball Screws
DFl Ball Screws
SFY/SFE Ball Screws
BSH Ball Screws
GTHA (DIN69051 Form B) Ball Screws
SCl Ball Screws
SFV Ball Screws
DFV Ball Screws
OFI Ball Screws
OFU (DIN 69051 FORM B) Ball Screws
Looking for the Ideal Ball Screw for Your Machinery? Let Our Expert
Team Provide Tailored Purchasing Advice to
Help You Make the Right Choice!
Custom Ball Screws with JSM for Your Automated Projects
JSM possess extensive expertise in ball screw customization. We deliver tailored linear motion solutions by optimizing core parameters, structure, material, performance, and
function to precisely align with your requirements.
Core Parameters
We specialize in customizing core parameters for ball screws, including nominal diameter, lead, and precision grade, to fulfill your technical specifications.
Nominal Diameter (Screw Shaft Outer Diameter)
- Range: Customizable from φ4 mm (micro-grade) to φ100 mm (large-format) as standard.
Lead (Axial Pitch)
- High-Speed Applications (e.g., automated conveyor systems, robotics): Larger leads (e.g., 20 mm, 30 mm) are preferred to maximize linear velocity.
- High-Precision Applications(e.g., semiconductor lithography, medical imaging): Smaller leads (e.g., 2 mm, 5 mm) optimize displacement resolution and positional accuracy.
Precision Grades
- Compliance: In accordance with GB/T 17587.3 (Chinese National Standard for Ball Screws).
- Grades: P1,P2, P3, P5 (selectable based on your application requirements).
Structure and Material
JSM offers customizable ball screw configurations, including circulation systems and nut designs, with carbon steel as the primary material.
Circulation Systems
- Internal Circulation: High rigidity and low noise, ideal for precision machinery (e.g., CNC machines, semiconductor equipment).
- External Circulation: Suitable for heavy-load applications requiring high-speed operation (e.g., injection molding machines, industrial robots).
Nut Configurations
- Single Nut: Cost-effective solution for general-purpose linear motion.
- Double Nut: Preloaded design for high-precision positioning and backlash elimination.
- Flanged Nut: Features include integrated mounting flanges for rigid structures.
- Flangeless Nut: Compact design for space-constrained applications like collaborative robots and medical devices.
Material
- Primary Material: Carbon steel, heat-treated for enhanced wear resistance.
Surface Treatmt
- Screw: Heat treatment for enhanced wear resistance.
- Nut: Carburization with case hardening to improve surface hardness.
Performance and Function
At JSM, we deliver tailored ball screw solutions with optimized load capacity, extended service life, dust protection, self-locking, and explosion-proof features to meet your industry needs.
Load Capacity
- Axial Load: Customizable from 5 kN to over 500 kN, achieved by increasing the screw diameter and optimizing the raceway design.
- Radial Load: With special design, ball screw can withstand radial force (such as vertically mounted lifting mechanism).
Life and Reliability
- Rated life (L10): By enlarging the ball diameter and optimizing the contact angle, the rated life can be extended from the standard 10,000 km to over 30,000 km.
- Dust-Proof Design: Incorporating labyrinth seals and rubber dust covers.
Special Functions
- Self-Locking Function: Custom large lead with low helix angle design ensures reverse self-locking, ideal for lifting platforms to prevent unintended sliding.
- Explosion-Proof Design: With surface insulation treatment and anti-static coating, our ball screws can be applied in flammable and explosive environments, such as chemical equipment.
Surface Treatmt
- Screw: Heat treatment for enhanced wear resistance.
- Nut: Carburization with case hardening to improve surface hardness.
Why Choose JSM as Your Ball Screw Wholesale Supplier
Advanced Production Equipment
JSM, with a 20,000m² self-owned factory, has introduced advanced equipment such as intelligent grinding machines, CNC centers, and automated packaging lines, enabling stable supplies to global customers.
Reliable Quality Assurance
Compliant with ISO 9001, we conduct rigorous three-stage testing on raw materials and ball screws to ensure accuracy and consistency. What's more, our offerings meet ISO 14001 and ISO 45001 standards.
Sustainability
By using eco-friendly materials, promoting green manufacturing, and adopting energy-saving equipment, we cut resource consumption and carbon emissions, and help our customers reduce energy and operational costs.
FAQ
Q: How to ensure the accuracy of ball screws?
Q: What are the main components of a ball screw?
Q: Can you provide ball screw assembly?
Q: What is the difference between ball screws and lead screws?
Q: How to maintain ball screws? What factors affect their service life?
Q: What are the primary applications of ball screws?
Q: Do you have the test and audit service?
Q: Do you provide sample ? Is it free?
Q: Can you do OEM and ODM?
Q: How long does customization take?
Q: What's your term of the delivery?
Q: What's your after-sales service policy?
As one of the most professional ball screw manufacturers and suppliers in China, we're featured by quality products and low price. Please rest assured to buy ball screw made in China here from our factory.
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Power Your Linear Motion System with JSM!
From precision linear guides to high-performance ball screws, we provide tailored solutions to optimize your machinery. Contact our experts at your convenience. We're 24/7 online.