SFNU Series Ball Screw

SFNU Series Ball Screw

Product Description

The SFNU Series Ball Screw is an industrial-grade linear motion drive system conforming to the international DIN 69051 Form B standard. It consists of a precision-machined helical screw shaft paired with a single flanged nut utilizing an internal ball recirculation mechanism.

Compact Form B Flange Geometry
The SFNU nut is characterized by its Form B trimmed flange, which features two flattened opposing edges. This compact profile facilitates installation in space-restricted machinery, enabling the screw to sit closer to mounting plates and standard housings (such as the DSG series) without mechanical interference. Available in precision-rolled (C7, C5) and precision-ground (C5, C3) accuracy classes, the SFNU series is widely deployed in CNC machine tool axes, automated production lines, and high-load electric linear actuators demanding high mechanical efficiency, consistent positioning repeatability, and standardized interchangeability.

Product Advantages: SFNU Series Ball Screws
Global Interchangeability: Strict adherence to DIN 69051 Form B dimensional standards ensures cross-manufacturer interchangeability, simplifying retrofit and replacement processes in CNC feed systems and automation machinery.
Compact, Tube-Free Profile: The internal deflector recirculation mechanism maintains a uniform outer cylinder diameter, eliminating external pipes and facilitating smooth integration into tight machine carriages and standard housings (such as the DSG series).
Reduced Motor Drive Requirements: The low rolling friction coefficient of the recirculating steel balls allows for smaller motor sizing, lowers operating temperatures, and reduces overall system energy consumption.
Controlled Backlash & Axial Rigidity: Precision ball matching combined with calibrated light-preload options minimizes axial play, supporting dependable bi-directional repeatability during rapid motion reversals.
Extended Fatigue Life: Precision-formed Gothic-arch raceways and ground bearing balls distribute contact loads evenly across multiple circuits, mitigating localized stress and wear during continuous, high-cycle production.

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