SHAFT ENGINEERING / WORKSPACE 01

Shaft Engineering Workspace

Design and evaluate shafts using operating loads, material properties, geometry and support conditions.

Calculation · Technical drawing · Engineering checks · Report

Local session · inputs are not saved or sent to a server.

Form values are user-entered unless otherwise identified. Open or collapse any numbered section as you work.

01Project

Project nameApplication

Unit system: SI · kW, rpm, N, N·m, mm, MPa. Alternate input unit systems are not supported in this workspace.

Design reference / basisIdentify the source and condition of your allowable stress.

02Operating Conditions

Power (kW)Speed (rpm)Service factorDESIGN SELECTEDDesign divisorDESIGN SELECTED

Service factor scales torque. The design divisor reduces the stress basis. Neither evaluates fatigue or establishes a complete factor of safety.

Duty / operating condition

03Material

Material context

REFERENCE VALUE: no nominal strengths are prefilled. Enter approved properties for the supplied product and heat treatment.

Yield strength (MPa)Ultimate strength (MPa)

Strengths are recorded for review, not used to derive allowable shear.

Stress basis (MPa)Allowable shear before the design divisor; requires a documented source.

04Geometry & Supports

Arrangement: three solid circular steps. All diameters are design-selected. Overall length is calculated from step lengths.

Step 1

Step 1 length (mm)DESIGN SELECTEDStep 1 diameter (mm)DESIGN SELECTED

Step 2

Step 2 length (mm)DESIGN SELECTEDStep 2 diameter (mm)DESIGN SELECTED

Step 3

Step 3 length (mm)DESIGN SELECTEDStep 3 diameter (mm)DESIGN SELECTED

Support A from left (mm)Support B from left (mm)

Supports must satisfy 0 ≤ A < B ≤ overall length. Overhangs follow from these positions. No bearing reaction calculation is performed.

05Additional Loads

Torque is calculated from power and speed. The following loads are recorded and drawn only; they do not contribute to the torsional sizing result.

Radial load (N)Load from left (mm)Axial load (N)Bending moment (N·m)

Enter positive load magnitudes. Gear and pulley forces must be resolved separately; no force model is provided here.

LIVE TECHNICAL VIEW

Build the shaft geometry

Add each shaft section using its length and diameter. The technical drawing will update as the geometry is defined.

Drawing Information

Project: Not defined
Material: Not defined
Overall length: Not defined
Units: mm
Scale: Not to scale — dimensions govern
Revision: Draft / 00
Drawing status: Engineering review required

Calculated minimum diameter

— mmPure torsion only

Selected design diameter

— mmSmallest shaft section

Current design status

Ready to beginNominal torsional stress only

Ready to begin

Start with the operating conditions and a documented stress basis, or load the illustrative example. Results update as valid inputs become available.

TECHNICAL BASIS

Equations you can follow.

T = 9550 P / nTdesign = T × service factorτallow = stress basis / design divisordmin = ∛(16 Tdesign / (π τallow))τselected = 16 Tdesign / (π dselected³)

P: kW; n: rpm; transmitted T: N·m. Convert design torque to N·mm before the diameter and stress equations. Diameter: mm; stress: MPa (N/mm²).

TEXTBOOK · University of Maryland, ENES 220, Torsion of Structural Elements

Pure torsion only. Bending, fatigue, keyways, shoulders, critical speed and stiffness need separate checks.

Engine source record reviewed 2026-09-15. Numerical regression tests verify the implementation, not a project design.

Results are preliminary engineering information and must be verified against the actual application, applicable standards, material data and required professional review.