W2803SA-3P-C5Z6 Ball Screw NSK 28mm shaft diameter 6mm lead Ball Screw

The NSK W2803SA-3P-C5Z6 precision ground ball screw is a finished shaft end product. It has an outer diameter of 28mm, a lead of 6mm, and a precision grade of C5. It comes standard with a flanged single nut and internal offset preload to achieve zero backlash. Its rated dynamic load is approximately 12900N.

"Finished shaft end product" means that both ends of the screw have been precision-machined to standard specifications (including steps, threads, keyways, etc.). It can be directly used with standard support units from NSK or THK, requiring no secondary fitting, and is ready to use immediately. It is widely applicable to small and medium-sized CNC equipment, automation modules, and precision transmission mechanisms that require certain positioning accuracy and rigidity.

NSK W2803SA-3P-C5Z6 Ball Screw Core Advantages

High Rigidity and High Load Capacity: The SA-type design optimizes the circulation trajectory of the steel balls in the pipeline, maintaining extremely low elastic deformation even under high axial loads.

High Positioning Accuracy: C5-grade accuracy combined with a backlash-eliminating preload design provides excellent repeatability and effectively prevents "reverse dead zones" during machine tool feed.

Eliminating Secondary Machining: As a standard pre-fabricated ball screw, both ends are typically pre-machined according to NSK standard support units, significantly shortening the equipment assembly and maintenance cycle.

Applications of the W2803SA-3P-C5Z6 finished ball screw:

Precision machine tools: Machining centers, CNC lathes, grinding machines, etc.

Automation equipment: Semiconductor manufacturing equipment, testing instruments, precision positioning platforms

Precision manufacturing: Electronic component processing, optical equipment, medical equipment

Suitable for applications requiring high-precision positioning, especially for mass production and standardized equipment.