The NSK W2005FA-4-C5T20 is a micro-backlash precision ball screw with a 20mm outer diameter and 20mm lead. It features an FA-type flange nut structure, a micro-backlash design, standard C5 high-precision rating, and external circulation, ensuring smooth, jam-free movement, excellent positioning accuracy, and a compact structure for easy installation.
Features of the W2005FA-4-C5T20 finished ball screw:
Conduit-type external circulation: Employs a conduit-type external circulation ball screw system, allowing for smooth ball circulation within a conduit outside the nut, resulting in a smoother path.
Precise backlash control: Axial backlash is only approximately 0.005mm, balancing high-precision positioning with smooth movement, avoiding overheating and wear caused by overload.
Compact structure: The FA series nut outer diameter is 30% smaller than traditional products, making it suitable for confined installation spaces, especially for small automated equipment.
Long life design: High-quality bearing steel and precision heat treatment processes, combined with LR3 grease, ensure long-term stable operation.
Applications of NSK 20×20 FA type finished ball screws with shaft end:
Semiconductor manufacturing
Electronic equipment
Medical instruments
Precision measurement
Automation equipment
Item |
Specification |
Model No. |
W2005FA-4-C5T20 |
Series |
Shaft End Finished Product |
Type |
FA |
Screw Shaft Diameter [mm] |
20 |
Lead [mm] |
20 |
Accuracy Grade |
C5 |
Ball Diameter [mm] |
3.969 |
Valid Number of Laps |
1.5×1 |
Gap Symbol |
T |
Circulation Method |
Pipe Circulation |
Nut Length [mm] |
63 |
Maximum travel [mm] |
441 |
Screw Length (Lt) [mm] |
510 |
Screw Length (La) [mm] |
535 |
Screw Length (L) [mm] |
620 |
Weight [kg] |
2.0 |
Rated Dynamic Load [N] |
8190 |
Rated Static Load [N] |
13100 |
Maximum Speed [Fixed-Free] (min-1) |
3000 |
Drive Side Support Unit |
WBK15-01A(Square) WBK15-11(Round) |
Reverse Drive Side |
WBK15S-01(Square) |

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