Structural, mechanical and machine-element reference — the numbers that come up constantly on the bench or in the field. Pick one below.
Deflection, bending stress, and safety factor for five standard support & load cases — load, shear, moment, and deflection drawn live.
Darcy–Weisbach head loss with a live Moody diagram — flow rate, pipe size, material, and fluid in, pressure drop out.
Pick a bolt size, grade, and lubrication condition — get the installation torque, with a realistic ±25% uncertainty band.
Length, mass, pressure, energy, power, temperature and more — twelve categories with exact standard factors and a live reference table.
Viscosity, density and specific gravity for oils, fuels and common fluids — with live viscosity-versus-temperature curves you can compare side by side.
Otto, Diesel, Brayton and Carnot ideal cycles — real state-by-state thermodynamics, with net work as the area enclosed.
Overall ratio, output speed, torque and rotation direction for up to three meshed gear stages, with mesh efficiency.
An animated single-cylinder cross-section with real slider-crank piston motion, synced to a timing diagram of every valve, port and spark event.
Helical compression spring stiffness, deflection and coil shear stress, with the Wahl correction and a safe-load limit.
Euler's formula for slender columns with automatic Johnson-formula fallback for short ones — critical load for any end condition.
Pressure times area is force. Solve F = P·A, see the cylinder to scale, and watch a small piston multiply into a big load through Pascal's principle.
ISO 286 hole and shaft tolerances for any nominal size, the clearance or interference between them, and a to-scale tolerance-zone diagram.
ISO 281 L10 bearing life — dynamic load rating, equivalent load and speed, with a quick-reference table of standard bearing sizes.
AS568 groove and gland design — squeeze, stretch and gland fill for static or dynamic seals, against standard cross-sections.
DIN 471/472 retaining ring groove dimensions and thrust load capacity, for external (shaft) or internal (bore) rings.