Ball Spline

Ball Spline

– High-Precision Linear & Rotary Motion Component for Robotics

    The Ball Spline, a high-performance motion component designed to transmit torque while enabling smooth linear movement. Combining the functions of a linear guide and a spline shaft, the ball spline allows simultaneous linear motion and rotational torque transmission, making it ideal for advanced robotic mechanisms and precision machinery.

Engineered with a recirculating ball structure, this system ensures ultra-low friction, high rigidity, and exceptional positioning accuracy. The ball grooves on the shaft and nut are precision-ground to guarantee stable motion, minimal backlash, and long service life—even under high-speed and high-load conditions.

Designed for compact integration and high efficiency, ball splines are widely used in robotics, automation equipment, and high-precision industrial systems where both linear and rotary motion are required.

Key Features

• Dual Functionality: Enables simultaneous linear motion and torque transmission
• High Precision & Rigidity: Ideal for demanding robotic applications
• Low Friction Operation: Recirculating ball system ensures smooth motion
• High Load Capacity: Supports both radial and torque loads
• Compact Design: Space-saving solution for integrated systems
• Long Service Life: Optimized wear resistance and durability

Applications

• Industrial robots and robotic arms
• Automation and pick-and-place systems
• CNC machines and precision equipment
• Semiconductor and electronics manufacturing
• Aerospace and high-end mechanical systems

Manufacturing Process

• CNC Precision Machining (shaft and spline nut pre-processing)
• Precision Grinding (spline grooves and raceways)
• Broaching / Spline Cutting (for high-accuracy groove profiles)
• Heat Treatment (quenching and tempering for hardness and wear resistance)
• Superfinishing (for ultra-smooth raceway surfaces)
• Ball Circulation System Assembly (recirculating balls and retainers)
• Surface Treatment (anti-corrosion coating or passivation)
• Final Inspection (torque transmission accuracy, backlash, and smoothness testing)

Tolerance & Dimensions

• Spline Shaft Diameter Tolerance: h6 / ±0.005–0.01 mm
• Ball Track Accuracy: High precision ground profile
• Positioning Accuracy: ±0.01–0.02 mm
• Repeatability: ±0.005–0.01 mm
• Backlash: ≤0.005–0.01 mm (preloaded)
• Surface Roughness (Raceway): Ra ≤ 0.2–0.4 μm
• Dimensional Tolerance: ±0.01–0.02 mm

Key Specifications

• Product Name: Ball Spline
• Material: Alloy Steel / Bearing Steel (e.g., GCr15)
• Structure: Spline Shaft + Ball Spline Nut
• Function: Linear motion + torque transmission
• Surface Finish: Precision Ground & Hardened
• Processing Method: CNC Machining + Grinding + Heat Treatment + Assembly
• Tolerance: ±0.01–0.02 mm
• Application: Robotics and high-precision motion systems

OEM / ODM Manufacturing Capability

As a professional OEM/ODM manufacturer, we specialize in high-precision motion transmission components for robotics and automation industries. With advanced machining, grinding, and assembly capabilities, we provide customized ball spline solutions tailored to your performance and design requirements.

• Custom shaft diameters, lengths, and spline configurations
• Preload and torque capacity customization
• Material selection for strength and wear resistance
• Surface treatment options for corrosion protection
• Integration with linear modules and robotic systems
• Logo engraving and private labeling
• Rapid prototyping and mass production

If you are sourcing a “Ball Spline”, we offer reliable, linear spline shaft, robotic spline component, torque transmission spline, precision ball spline, CNC spline shaft, automation motion spline OEM，precision-engineered solutions tailored to your market. Contact us now for OEM customization, samples, or bulk quotations.