| $B_A$ | coefficient $ B_A $ | $\mathrm{}$ |
| $B_B$ | coefficient $ B_B $ | $\mathrm{}$ |
| $B_T$ | coefficient $ B_T $ | $\mathrm{}$ |
| $B_{1A-hub}$ | coefficient $ B_{1A-hub} $ | $\mathrm{}$ |
| $B_{1B-hub}$ | coefficient $ B_{1B-hub} $ | $\mathrm{}$ |
| $B_{1T-hub}$ | coefficient $ B_{1T-hub} $ | $\mathrm{}$ |
| $B_{2A-hub}$ | coefficient $ B_{2A-hub} $ | $\mathrm{}$ |
| $B_{2B-hub}$ | coefficient $ B_{2B-hub} $ | $\mathrm{}$ |
| $B_{2T-hub}$ | coefficient $ B_{2T-hub} $ | $\mathrm{}$ |
| $B_{3A-hub}$ | coefficient $ B_{3A-hub} $ | $\mathrm{}$ |
| $B_{3B-hub}$ | coefficient $ B_{3B-hub} $ | $\mathrm{}$ |
| $B_{3T-hub}$ | coefficient $ B_{3T-hub} $ | $\mathrm{}$ |
| $B_{4B-hub}$ | coefficient $ B_{4B-hub} $ | $\mathrm{}$ |
| $B_{4T-hub}$ | coefficient $ B_{4T-hub} $ | $\mathrm{}$ |
| $B_{A-hub}$ | coefficient $ B_{A-hub} $ | $\mathrm{}$ |
| $B_{B-hub}$ | coefficient $ B_{B-hub} $ | $\mathrm{}$ |
| $B_{T-hub}$ | coefficient $ B_{T-hub} $ | $\mathrm{}$ |
| $C_c$ | coefficient according to load | $\mathrm{ }$ |
| $D$ | diameter of the shaft | $\mathrm{mm}$ |
| $D_h$ | diameter of the hub | $\mathrm{mm}$ |
| $F_A$ | axial force | $\mathrm{kN}$ |
| $F_R$ | radial force | $\mathrm{kN}$ |
| $M_B$ | bending moment | $\mathrm{Nm}$ |
| $M_T$ | twisting moment | $\mathrm{Nm}$ |
| $P_B$ | bearing stress | $\mathrm{MPa}$ |
| $P_{B-pin-hub}$ | bearing stress in the pin and hub | $\mathrm{MPa}$ |
| $P_{B-pin-shaft}$ | bearing stress in the pin and shaft | $\mathrm{MPa}$ |
| $P_{all-B-hub}$ | allowable bearing stress the hub | $\mathrm{MPa}$ |
| $P_{all-B-pin}$ | allowable bearing stress the pin | $\mathrm{MPa}$ |
| $P_{all-B-shaft}$ | allowable bearing stress the shaft | $\mathrm{MPa}$ |
| $S_F$ | safety factor | $\mathrm{ }$ |
| $S_{y-hub}$ | the minimum yield strength of the hub | $\mathrm{MPa}$ |
| $S_{y-pin}$ | the minimum yield strength of the pin | $\mathrm{MPa}$ |
| $S_{y-shaft}$ | the minimum yield strength of the shaft | $\mathrm{MPa}$ |
| $T_{S-hub}$ | shear stress in the hub | $\mathrm{MPa}$ |
| $T_{S-shaft-hub}$ | shear stress in the weakened part of the shaft-hub | $\mathrm{MPa}$ |
| $T_{S-shaft}$ | shear stress in the shaft | $\mathrm{MPa}$ |
| $T_{all-S-hub}$ | allowable shear stress the hub | $\mathrm{MPa}$ |
| $T_{all-S-pin}$ | allowable shear stress the pin | $\mathrm{MPa}$ |
| $T_{all-S-shaft}$ | allowable shear stress the shaft | $\mathrm{MPa}$ |
| $d$ | diameter of the pin | $\mathrm{mm}$ |
| $i$ | number of pins | $\mathrm{ }$ |
| $l$ | length pin | $\mathrm{mm}$ |
| $t$ | width between pins | $\mathrm{mm}$ |
| $α$ | angle between pins | $\mathrm{rad}$ |
| $σ_{A-hub}$ | axial stress in the hub | $\mathrm{MPa}$ |
| $σ_{A-shaft}$ | axial stress in the shaft | $\mathrm{MPa}$ |
| $σ_{B-hub}$ | bending stress in the hub | $\mathrm{MPa}$ |
| $σ_{B-shaft-hub}$ | bending stress in the weakened part of the shaft-hub | $\mathrm{MPa}$ |
| $σ_{B-shaft}$ | bending stress in the shaft | $\mathrm{MPa}$ |
| $σ_{all-A-hub}$ | allowable axial stress the hub | $\mathrm{MPa}$ |
| $σ_{all-A-shaft}$ | allowable axial stress the shaft | $\mathrm{MPa}$ |
| $σ_{all-B-hub}$ | allowable bending stress the hub | $\mathrm{MPa}$ |
| $σ_{all-B-shaft}$ | allowable bending stress the shaft | $\mathrm{MPa}$ |
| $σ_{all-C-hub}$ | allowable combined stress the hub | $\mathrm{MPa}$ |
| $σ_{all-C-shaft}$ | allowable combined stress the shaft | $\mathrm{MPa}$ |
| $σ_{tresca-hub}$ | combined stress in the hub | $\mathrm{MPa}$ |
| $σ_{tresca-shaft}$ | combined stress in the shaft | $\mathrm{MPa}$ |
| $τ_{S-pin}$ | shear stress in the pin | $\mathrm{MPa}$ |
| $τ_{T-hub}$ | torsion stress in the hub | $\mathrm{MPa}$ |
| $τ_{T-shaft}$ | torsion stress in the shaft | $\mathrm{MPa}$ |
