Cogbench iconCogbench
Cogbench app icon

Cogbench

A pocket workbench for gear trains. Set the module and tooth counts, and watch a live pair with true involute profiles turn.

Pinion teeth8–80
Gear teeth8–150
Angles14.5 / 20 / 25°
Coming soon to the App Store
Cogbench Mesh Lab screen with a gold pinion meshing a green gear
On the bench

Four tools, one workshop

01

Mesh Lab

Drag sliders for module and teeth on a live, animated pair. Read ratio, centre distance and pinion diameter, and get an undercut warning when the pinion has too few teeth.

02

Gear Chain

Stack two to eight gears with idlers. See the speed and turning direction of every stage, plus total ratio and output rpm.

03

Ratio Finder

Type a target ratio and get up to twenty tooth pairs ranked by percent error, with the best match marked and one tap from the bench.

04

Drive Library

Work through planetary, worm, rack and pinion, and bevel drives, with a moving schematic and the formulas solved for you.

05

Logbook

Save good builds, load them back into Mesh Lab, or compare any two side by side with the differences highlighted.

Units
Millimetres or inches, applied across every screen.

Share
Export a parameter card of your build through the system share sheet.

Offline
Works fully offline. No account, no network, nothing collected.

Inside the app

Straight from the bench

Cogbench Ratio Finder screen
Ratio Finder
Cogbench Planetary drive screen
Planetary drive
Cogbench Gear Chain screen
Gear Chain
Cogbench Side by Side screen
Side by Side