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The SFK series miniature ball screws are engineered for high-precision motion control, featuring an advanced internal circulation design that optimizes space and efficiency. With a compact outer diameter ranging from 4mm to 25mm and a precise lead of 1mm to 4mm, these components are specifically designed for precision transmission scenarios where spatial constraints are critical.
By integrating high-grade screws, nuts, and precision balls, the system ensures a seamless conversion between rotational and linear motion through minimized rolling friction. This makes the SFK series an ideal choice for milling machines and other high-accuracy industrial equipment requiring stable, smooth, and reliable linear guidance.
Detailed Parameters
Product Series SFK Miniature Series Outer Diameter Range 4mm - 25mm Lead Range 1mm - 4mm Precision Grade C3 Ground Level Circulation Type Internal Circulation Core Components Screw, Nut, Steel Balls Application Milling Machines / Precision Tools Motion Conversion Rotary to Linear Model Examples SFK0401, SFK0802, SFK1202 Friction Type Rolling Friction Key Advantages
Ultra-Compact Design
With diameters as small as 4mm, it fits perfectly into tight spaces without compromising performance.
High Efficiency
Internal circulation reduces energy loss and ensures smooth, consistent motion delivery.
C3 Precision Ground
Ground finish ensures high accuracy and minimal backlash for demanding industrial tasks.
Reduced Friction
Rolling friction mechanism significantly lowers wear and tear compared to sliding guides.
Optimized Lead
Lead options from 1-4mm allow for precise tuning of travel speed and torque requirements.
Industrial Versatility
Ideal for milling machines, medical devices, and robotics requiring micro-linear movement.
Product Gallery


Management Platforms
Inventory Control
Real-time tracking of Ball Screw and Linear Module stock levels.
Quality Assurance
Strict C3 ground precision testing for every batch of SFK components.
Order Monitoring
End-to-end visibility from manufacturing to global shipment.
Customization Hub
Tailored lead and diameter specifications for unique project needs.
Logistics Network
Optimized supply chain for fast delivery of miniature bearings and gears.
Technical Support
Expert guidance on integrating linear motion pairs into machinery.
Investment Return Comparison
Feature Standard Lead Screws SFK Ball Screws Friction Coefficient High (Sliding) Ultra-Low (Rolling) Positioning Accuracy Moderate High (C3 Precision) Energy Consumption Higher due to friction Lower / Efficient Service Life Short (High Wear) Long (Low Friction) Space Efficiency Bulky Compact (Miniature) Frequently Asked Questions
Q: What is the difference between a ball screw and a lead screw?A ball screw uses recirculating balls to minimize friction and maximize efficiency, whereas a lead screw relies on sliding contact, which results in higher friction and lower precision.
Q: What does the C3 ground precision signify?C3 refers to a specific precision tolerance class achieved through grinding, ensuring minimal deviation and high repeatability in linear positioning.
Q: Are these miniature ball screws suitable for CNC milling machines?Yes, the SFK series is specifically designed for milling machines and other precision equipment where limited space and high accuracy are required.
Q: How does the internal circulation design benefit the system?Internal circulation allows the balls to return to the start position without external guides, reducing the overall footprint and simplifying installation.
Q: What is the typical lifespan of a miniature ball screw?Due to the use of rolling friction, SFK ball screws have a significantly longer lifespan than traditional lead screws, provided they are properly lubricated.
Q: Can I customize the lead or diameter for my specific application?Yes, we offer a range of diameters (4-25mm) and leads (1-4mm) to meet diverse precision transmission requirements in the manufacturing sector.
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