Engineering lab
Engineering tools. Inspect the assumptions.
Use the tools to screen first-order feasibility, expose assumptions, and prepare the next model or test. They support preliminary engineering judgment; they do not replace complete design verification.
Tolerance Stack Calculator
Build a signed linear stack, compare worst-case and RSS limits, convert units, share a state, and export a report.
Open calculatorTOOL 02Bolt Preload + Torque Estimator
Screen installation torque, axial preload, tensile stress, and yield utilization with the T = KFd relationship.
Open calculatorTOOL 03Beam Deflection + Stress Calculator
Compare elastic stress and deflection for three common rectangular-beam load cases with explicit assumptions.
Open calculatorTOOL 04Four-Bar Linkage Explorer
Test Grashof classification, solve open or crossed position closure, and inspect live output geometry.
Open calculatorTOOL 05Thermal Fit + Clearance Calculator
Estimate bore and shaft growth at independent temperatures, then track clearance or interference through the thermal state.
Open calculatorTOOL 06Shaft Torsion + Power Calculator
Screen solid or hollow shafts for transmitted power, torque, shear stress, angle of twist, and yield strength ratio.
Open calculatorTOOL 07Compression Spring Calculator
Estimate spring rate, force, Wahl-corrected shear stress, and coil-bind margin for a round-wire compression spring.
Open calculatorTOOL 08Pin + Clevis Joint Calculator
Screen a pin joint for average pin shear, lug bearing, clevis bearing, and the minimum allowable-to-stress ratio.
Open calculatorRESOURCE 01Mechanical Design Review Checklist
A printable gate review covering requirements, interfaces, loads, mechanisms, tolerances, production, validation, and release evidence.
Open checklistMethods + reference checks
Reproduce the result.
Each tool publishes its model and a fully specified reference case. The calculated column below is evaluated by the same functions as the interactive tools.
| Tool / reference quantity | Expected | Calculated |
|---|---|---|
| Tolerance stackAssumed RSS center | 6.05000 mm | 6.05000 mm |
| Bolt preloadAxial preload | 35000 N | 35000 N |
| Beam bendingElastic tip deflection | 15.625 mm | 15.625 mm |
| Four-bar closureOutput angle | 90.000 ° | 90.000 ° |
| Thermal fitFinal diametral clearance | 0.031024 mm | 0.031024 mm |
| Shaft torsionTorque | 31.83099 N·m | 31.83099 N·m |
| Compression springSpring rate | 4.84009 N/mm | 4.84009 N/mm |
| Pin + clevisLoaded-lug bearing stress | 125.00 MPa | 125.00 MPa |
Open a calculator’s method panel for inputs, equations, assumptions, and limitations. These checks establish arithmetic consistency for the stated models; they do not validate a physical design.
Direct conversation
Use the calculation to define the next engineering check.
The result is a screening record, not a release decision. Bring the real geometry, interfaces, load cases, and acceptance criteria into the next review.
Discuss the Design