A HIWIN ball screw is a mechanical linear actuator that translates rotational motion to linear motion with little friction. It uses ball bearings to eliminate the sliding friction found in traditional lead screws. HIWIN is a Taiwanese manufacturer known for precision motion control components, and their ball screws are widely used in CNC machines, robotics, automation, and semiconductor equipment.
🔧 Components of a HIWIN Ball Screw
Screw Shaft: A precision-ground or rolled shaft with a helical groove (thread).
Ball Nut: Encases the screw shaft and contains ball bearings that circulate inside.
Ball Bearings: Circulate between the shaft and the nut, minimizing friction.
Return System: Allows the balls to recirculate within the nut (can be external or internal).
End Supports (optional): Bearings or mounts that support the screw ends and allow rotation.
📏 Types of HIWIN Ball Screws
Ground Ball Screws
Precision-machined
High accuracy (up to C0–C5 class)
Low noise and smooth motion
Used in high-end applications like CNC and semiconductor machinery
Rolled Ball Screws
Threads are formed by rolling
Lower precision (C7–C10 class)
More economical
Suitable for general automation and industrial machinery
🔍 Key Specifications
Lead (mm): Distance the nut travels per revolution
Diameter (mm): Shaft size, affects load capacity
Accuracy Grade: C0 to C10 (C0 = ultra-precise, C10 = least precise)
Preload: Optional to eliminate backlash and increase rigidity
Nut Type: Single nut, double nut, flange type, cylindrical, etc.
📐 Accuracy Classes (ISO 3408 / JIS B1192)
Class Lead Accuracy (µm/300mm) Typical Use Case
C0 ±3 High-precision instruments
C1 ±5 Semiconductor, metrology tools
C3 ±7 CNC machines, robotics
C5 ±23 Industrial machinery
C7 ±52 Basic automation, economic machinery
C10 ±210 Low-end applications
⚙️ Advantages of HIWIN Ball Screws
High efficiency (~90% or more)
Smooth, precise motion
Long service life with proper lubrication
Can handle high loads and speeds
Minimal backlash with preloaded nuts
🛠️ Applications
CNC machinery (mills, lathes, routers)
3D printers and linear actuators
Robotics and automation systems
Medical imaging equipment
Semiconductor processing machines
