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……………………………………(10)
K n: Axial rigidity of the ball nut (N/μm)
K: Rigidity value in dimension tables (N/μm)
F a0: Axial load (N)
C a: Basic dynamic load rating (N)
c. Axial rigidity of support bearing
……………………………………(11)
K B: Axial rigidity of support bearing (N/μm)
F a0: Preload of bearings (N)
δ a0: Axial elastic deformation by preload (N/μm)
Q : Axial load (N)
D a: Ball diameter (mm)
α: Contact angle (degree)
Z: Number of balls
6. Ball Screw Assembly Accuracy
1) Lead Accuracy
Weiyuan precision ball screw assembly accuracy is based on ISO3408-4, divided into 1, 2, 3, 4, 5, 7,
10, seven levels. Level 1 has the highest accuracy, successively in reduce sort.
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