Under the same outer diameter conditions, when the wall thickness of a hollow shaft reaches 10mm, its bending strength section modulus can reach 98% of that of a solid shaft (W value 0.096cm³ vs 0.098cm³). Regarding torsional stiffness, under the same material and cross-sectional area conditions, a hollow shaft increases torsional efficiency by 17%-23% by increasing the average distance from the material to the shaft center.
Compared to a solid shaft, it offers:
1.Weight reduction of 30%-45% (for the same outer diameter)
2.Material cost reduction of 20%-30%
3.Axial space utilization improvement of 10%