The NSK W2513FA-4-C5T25 is a FA series shaft-end finished large-lead ball screw with a nominal diameter of 25 mm, a lead of 25 mm, and an accuracy class of C5.
The FA type W2513FA-4-C5T25 ball screw uses a tube-circulation structure, meaning the balls circulate through a return tube inserted into the nut body. Tube-circulation types are commonly used in medium to large-sized ball screws, featuring smooth operation and uniform force distribution, making them suitable for high-load working environments.
The main features of the W2513FA-4-C5T25 external circulation ball screw are as follows:
High positioning accuracy: Accuracy grade up to C5, precision ground for smooth operation.
Zero axial backlash: Achieved through interference ball preload (P-type), resulting in zero axial backlash, high rigidity, and suitability for bidirectional precision positioning.
Compact structure: Flange-type single-nut design saves installation space.
Wide applicability: Designed specifically for industrial automation equipment (FA series), commonly found in CNC machine tools, industrial robots, automotive equipment, and precision manufacturing lines.
Application industries of NSK FA type shaft-end finished ball screws:
CNC machine tools: Machining centers, lathes, milling machines, etc.
Automation equipment: Industrial robots, automated assembly lines, precision positioning platforms
Semiconductor equipment: Wafer handling, testing equipment
Medical equipment: Precision medical instruments, diagnostic equipment
Precision measuring instruments: Coordinate measuring machines, image measuring instruments
Item |
Specification |
Model No. |
W2513FA-4-C5T25 |
Series |
Shaft End Finished Product |
Type |
FA |
Screw Shaft Diameter [mm] |
25 |
Lead [mm] |
25 |
Accuracy Grade |
C5 |
Ball Diameter [mm] |
4.762 |
Valid Number of Laps |
1.5×1 |
Gap Symbol |
T |
Circulation Method |
Pipe Circulation |
Nut Length [mm] |
90 |
Maximum travel [mm] |
1246 |
Screw Length (Lt) [mm] |
1350 |
Screw Length (La) [mm] |
1380 |
Screw Length (L) [mm] |
1513 |
Weight [kg] |
6.2 |
Rated Dynamic Load [N] |
11700 |
Rated Static Load [N] |
19700 |
Maximum Speed [Fixed-Free] (min-1) |
1850 |
Drive Side Support Unit |
WBK20-01A(Square) WBK20-11(Round) |
Reverse Drive Side |
WBK20S-01(Square) |

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