Pinned shaft with one groove
<img src="https://eng-calculations.com/SVG/Roark(and39)s_formulas_for_Stress_and_Strain/Formulas_for_torsional_deformation_and_stress_(TABLE_10(and46)1)/Pinned shaft with one groove.svg" alt="Pinned_shaft_with_one_groove" title="Pinned_shaft_with_one_groove">
https://eng-calculations.com/SVG/Roark(and39)s_formulas_for_Stress_and_Strain/Formulas_for_torsional_deformation_and_stress_(TABLE_10(and46)1)/Pinned shaft with one groove.svg