ExactCog

Gears

Planetary set

Sun teeth

Planet teeth

Planets

Selected gear

Select a gear to edit it.

Gear system

Units

Circular pitch (mm)

Pressure angle (°)

Input speed (rpm)

Every gear shares these, so any two can mesh. Speed only changes the readouts.

Fit & tolerance

Made by

Clearance (mm)

Hole compensation (mm)

Hole compensation grows bores in the STL only. The fit test measures both.

View

Pitch circles Line of action and base circles Centre marks 10 mm grid

Turn the gears (one tooth)

Print setup

Paper

Measured length of the printed 100 mm bar

Print at 100 % with fit to page off, measure the bar, enter what you measured and print again. Big gears tile with crop marks.

Scroll zoomDrag background to panDrag a gear to move and snapDel removeEsc deselect