DFU4005 Ball Screw

DFU4005 Ball Screw

Product descriptions

The DFU4005 Ball Screw Assembly is an extreme-duty linear motion component engineered for applications demanding maximum structural rigidity and absolute zero-backlash performance.

Featuring a massive 40mm shaft, this assembly offers superior resistance to buckling and vibration, even under heavy vertical loads. It is paired with a fine 5mm lead, which maximizes torque multiplication to generate immense axial thrust. The preloaded Double Nut (DFU) configuration completely eliminates backlash, ensuring high stiffness and precise positioning. The DFU4005 is the premier choice for large-scale CNC machinery, precision electric presses, heavy Z-axis columns, and boring mills where unwavering stability and fine motion control are critical.

Performance Characteristics

1.Massive Mechanical Advantage
The fine 5mm lead functions as a high-ratio reduction gear, maximizing mechanical efficiency. This design allows a standard servo motor to generate immense axial thrust, making it capable of lifting heavy Z-axis assemblies or driving electric press rams without the need for an external gearbox.
2.Zero Backlash & Superior Stiffness
The preloaded Double Nut configuration eliminates the "dead zone" typically found during direction reversals. Crucially, it creates an exceptionally stiff mechanical connection. When a heavy milling cutter engages with the workpiece, the screw resists vibration and deflection, ensuring precise tolerances and a smooth surface finish.
3.Enhanced Safety & Stability
The combination of a 5mm pitch on a large 40mm diameter results in a very shallow helix angle. This geometry creates high internal friction against back-driving forces. As a result, the system is naturally resistant to "free-falling" under gravity, adding a critical layer of safety for heavy vertical lifting applications.

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