ehcrea tools.

Free engineering calculators that run in your browser, no install or account needed. See them all with screenshots at tools.ehcrea.com.

Precision Engineering Calculators

Flexures, beam theory, Hertz contact, buckling, motion profiles and thermal effects, based on the JPE Precision Point formulas.

Liquid- and gas-cooled cold plates: 2D temperature map, coolant temperature rise, pressure drop and pump operating point.

1D tolerance stack-ups with ISO 286 fits, ISO 2768, play and thermal expansion. Worst case, RSS and Monte Carlo.

Gas load, conductance, pump-down time, pump selection and wall strength of vacuum chambers.

O-ring grooves for piston, rod, face, dovetail and boss seals: squeeze, gland fill, stretch and extrusion gap.