| a0 |
Axial distance between load input and output points |
| a1 |
Distance between hub face and load-bearing part of the feather key |
| bN |
Total width of the hub |
| c |
Width of the hub with diameter D2 within the load-bearing length |
| d |
Shaft diameter |
| uK |
Position |
| lPF |
Length of the feather key |
| ltr |
Load-bearing length of the feather key |
| D1 |
Small outer diameter of stepped hub |
| D2 |
Large outer diameter of stepped hub |
| BND1 |
Width of the hub for D1 |
| BND2 |
Width of the hub for D2 |
| Fu |
Circumferential force |
| T |
Torsional moment |
| - - - |
Part of the feather key connection in the power flow |