Smooth section
Constant solid or hollow section without a geometric notch. Mark d and, where applicable, dᵢ.
Technical reference: DIN 743-1 · DIN Media ↗Shafts · complete strength verification
Shaft verification to DIN 743
Verify critical shaft sections under axial load, bending and torsion for fatigue and maximum load.
DIN743
02
Results
ƒ(x)
Set the inputs and run the calculation.
Redraw references
Shaft-verification notch cases
Original schematic views based on the linked technical references. Rebuild the final artwork in Inkscape and label only dimensions used by the calculator.
Shoulder with fillet
Show large diameter D, notch-section diameter d and radius r. The notch is at the transition to the smaller step.
Technical reference: ANSYS · shaft with shoulder fillet ↗Shoulder with relief groove
Show relief width, depth or reference diameter, and both radii for the selected DIN 509 form.
Technical reference: Schaeffler · Technical Pocket Guide ↗Circumferential round or rectangular groove
Show groove width m, root diameter d, depth t and root radius r. Retaining-ring grooves are a common special case.
Technical reference: Seastrom · retaining-ring grooves ↗Keyway
Longitudinal view with keyway width b and shaft-keyway depth t₁; also add a cross-section through shaft, key and hub.
Technical reference: MBO Osswald · DIN 6885 key ↗Custom notch
No specific standard geometry. Draw the actual contour and identify the source of the stress-concentration or fatigue-notch factors.
Technical reference: ANSYS · validated stress concentration ↗What this calculator does
The calculator separates mean, alternating and maximum load, applies size, roughness, strengthening and notch effects, and compares multiple critical sections.
What still needs checking
Constant or damage-equivalent amplitudes at 20 °C. Transverse shear, load spectra, hard surface layers and crack initiation need an extended assessment. Diagram-derived notch factors must be entered traceably.