Make gears that work together.

Set your dimensions, inspect the teeth, and download gears for your next prototype.

Size your gearChoose the gear type and set tooth count, module, width, and bore.
Match the pairSet the second gear’s tooth count and check the ratio, center distance, or bevel cone angles.
Inspect the meshRotate the preview and move the phase sliders. Check intersections and inspect the involute tooth profile.
Print a prototypeDownload STL or OBJ files, slice them in millimetres, and test the fit before putting the pair to work.
Open Gears

Free, no account. Your work stays on this device. Bevel teeth and worm wheels use approximations; verify their engagement with a test print.