Open Access
Table 2
Geometrical and mechanical parameters of the PRSM used in the experiment.
| PRSM design parameters | Material properties | ||
|---|---|---|---|
| Pitch p | 1 mm | Young Modulus E | 210 GPa |
| radii rN, rS, rR | 15; 9; 3 mm | Poisson ratio v | 0.3 |
| External radius rext | 18.5 mm | Torsional fatigue limit Lt | 570 MPa |
| Pressure angle | 45° | Bending fatigue limit Lf | 1094 MPa |
| Lead | 3 mm | ||
| Roller thread curvature | 4.2426 mm−1 | ||
| Contact geometry (roller‐screw) | Contact geometry (roller‐nut) | ||
| Screw main curvature ρ11 | −0.1096 mm−1 | Nut main curvature ρ11 | 0.0239 mm−1 |
| Screw main curvature ρ12 | 78.7873 mm−1 | Nut main curvature ρ12 | −47.2392 mm−1 |
| Roller main curvature ρ21 | 218.2140 mm−1 | Roller main curvature ρ21 | 218.1828 mm−1 |
| Roller main curvature ρ22 | 253.5213 mm−1 | Roller main curvature ρ22 | 253.5537 mm−1 |
| Angle between frames β | 41.8° | Angle between frames β | 87.1o |
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