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

Four tools, one workshop
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.
Gear Chain
Stack two to eight gears with idlers. See the speed and turning direction of every stage, plus total ratio and output rpm.
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.
Drive Library
Work through planetary, worm, rack and pinion, and bevel drives, with a moving schematic and the formulas solved for you.
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.
Straight from the bench



