Precision engineering tools

Tools for engineers who measure in microns.

Modus Lab builds small, sharp software for mechanical and precision engineering. The kind of analysis you can defend in a design review, without the weight of a full CAD suite.

No installs. Runs in the browser. Built on real engineering standards.
Tolerance chain RSS · 3σ
Bore±0.050
Spacer±0.030
Bearing±0.025
Ring±0.010
Stack gap
±0.0634 mm RSS

GD&T as a first input

Flatness, runout, position and the rest feed the math directly, not as an afterthought bolted on later.

Statistics you can trust

Worst-case, RSS and Monte Carlo agree with each other, because the models are built to be consistent.

A clear next move

Every result ends with one plain-English recommendation: which feature to tighten, and what it buys you.

// the lab

Tools, one job each

01 live · 02 in build
Live

StackSense

Tolerance stack-up analysis. Axial, radial and angular chains with GD&T as a first-class input, RSS and Monte Carlo, and a recommendation for which component to tighten first.

Open StackSense
Soon

FitFinder

ISO 286 limits and fits selector. Pick a clearance, transition or interference fit and get the exact shaft and hole tolerances, plus the resulting play.

In build
Soon

ThermoDesk

Heat-exchanger and refrigeration-cycle calculators with real fluid properties, sized for quick design-review checks rather than full simulation.

In build

Built for the moment before you release a drawing.

Start with StackSense. More of the lab is on the way.

Open StackSense