The NSK W2515FA-2-C5T20 ball screw is a precision-finished shaft end product, belonging to the FA type for small equipment. The W2515FA-2-C5T20 shaft end finished ball screw has a shaft diameter of 25mm, a lead of 20mm, and a nut type of LPFT or LSFT. Through preloading, axial backlash is effectively eliminated.
The NSK W2515FA-2-C5T20 high-rigidity ball screw features the following characteristics:
Standardized machining of the shaft end allows for direct installation of support units, reducing secondary machining and improving assembly accuracy;
Low operating noise and vibration, suitable for precision and clean environments;
High speed and high-speed feed capability, suitable for automated and high-speed machine tool applications;
Offering a C5 high-precision grade, providing high positioning accuracy and repeatability;
A preload structure can be used to achieve low backlash and high rigidity;
Excellent sealing and lubrication performance, long service life, and short maintenance cycle;
As a standardized finished product series, it has a short lead time, facilitating batch design and replacement of equipment.
The NSK W2515FA-2-C5T20 ball screw is commonly used in:
CNC machine tools: feed axes of CNC machining centers, lathes, and milling machines.
Automated production lines: robotic arms and material handling robots.
Precision measuring instruments: coordinate measuring machines, etc.
Item |
Specification |
Model No. |
W2515FA-2-C5T20 |
Series |
Shaft End Finished Product |
Type |
FA |
Screw Shaft Diameter [mm] |
25 |
Lead [mm] |
20 |
Accuracy Grade |
C5 |
Ball Diameter [mm] |
4.762 |
Valid Number of Laps |
2.5×1 |
Gap Symbol |
T |
Circulation Method |
Pipe Circulation |
Nut Length [mm] |
96 |
Maximum travel [mm] |
1440 |
Screw Length (Lt) [mm] |
1550 |
Screw Length (La) [mm] |
1580 |
Screw Length (L) [mm] |
1713 |
Weight [kg] |
6.9 |
Rated Dynamic Load [N] |
18600 |
Rated Static Load [N] |
32600 |
Maximum Speed [Fixed-Free] (min-1) |
1400 |
Drive Side Support Unit |
WBK20-01A(Square) WBK20-11(Round) |
Reverse Drive Side |
WBK20S-01(Square) |

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