SFU1204 / SFU1605 Anti-Backlash Ball Screw with Ball Nut – High Precision Linear Motion for CNC Routers

Overview 

When building or upgrading a CNC router to cut tough materials like aluminum, brass, or hardwoods, standard lead screws won’t cut it under heavy cutting forces. Our SFU Series Precision Ball Screws offer a high-efficiency mechanical solution. Because the ball bearings roll continuously inside the nut housing, there is virtually zero sliding friction. This means your stepper or servo motors can move heavy axes faster, smoother, and with absolute positional repeatability down to the micron.

Key Features 

• Zero Backlash Performance: Internal rolling steel balls eliminate play between the screw and the nut, completely removing directional lag during complex curve milling.

• High Mechanical Efficiency: Requires up to 70% less driving torque from your NEMA stepper motors compared to traditional trapezoidal lead screws.

• Industrial Load Capacity: Easily handles extreme axial thrust loads during high-speed plunge and feed rates without deforming.

• Quiet & Smooth Operation: Precision-ground or rolled tracks ensure fluid travel with minimal acoustic noise or vibration.

Technical Specifications 

Understanding the Model Numbers:

• SFU1204: Means the outer screw shaft diameter is 12mm, and the pitch (lead) is 4mm (the nut moves exactly 4mm forward for every 1 full 360° rotation).

• SFU1605: Means the outer screw shaft diameter is 16mm, and the pitch is 5mm.