Unflanged Internal Circulation Ball Nut

TBI SCNI / SCI Series Ball Screws

Compact, High-Rigidity Internal Circulation Solution

The TBI SCNI / SCISeries ball screws are engineered for precision motion applications where space efficiency, smooth performance, and long-term reliability are critical. Featuring an advanced internal return (circulation) design, these ball screws deliver high efficiency and ultra-smooth operation in a compact, unflanged form—making them ideal for automation equipment, CNC machinery, and precision positioning systems.

Key Features

Unflanged, Compact Design

The flangeless nut structure allows for simplified integration and reduced installation space, making it perfect for compact machinery and tight assemblies.

Internal Return (Circulation) System

The internal ball circulation design minimizes external components, reduces overall size, and enhances operational stability while maintaining high efficiency.

Low Noise Operation

Optimized ball recirculation and precision machining ensure smooth, quiet motion—ideal for applications requiring reduced acoustic output.

Enhanced Dust Protection

Designed to resist contamination, improving durability and maintaining consistent performance even in challenging environments.

High Rigidity & Zero Backlash

Precision preload and advanced groove design deliver excellent rigidity with no backlash, ensuring accurate positioning and repeatability.

Small Driving Torque

High mechanical efficiency allows operation with significantly reduced torque—typically far lower than conventional screw systems—resulting in energy savings and improved responsiveness.

High Precision & Reliability

Available in multiple accuracy grades (e.g., C5, C7), the series supports precise linear motion with long service life and consistent performance.

Performance Advantages

The SCNI / SCI series combines compact form factor with high load capacity and durability, making it a versatile solution across industries. With diameters typically ranging from 14 mm to 100 mm and multiple lead options, these ball screws can be tailored to meet specific speed, load, and accuracy requirements.

Typical Applications

• CNC machine tools
• Automation and robotics systems
• Precision positioning equipment
• Semiconductor and medical machinery
• General industrial motion systems

Summary

The TBI SCNI / SCI Series offers a powerful combination of compact design, high rigidity, low torque, and zero backlash, delivering precision motion control in demanding applications. Its internal circulation mechanism and robust construction ensure quiet, efficient, and long-lasting performance—making it a trusted choice for modern engineering systems.