Measure existing gears and use these parameters to create 3D model in CAD in the way as above.

This is more easy than in previous steps, but also required to find similar gears (or at least their picture) Use graphics software with build in gear-generation features.

Gear Software Free CAD Software

E.g Inkscape (graphics editor with extension which renders a gears), FreeCAD (free CAD software), etc.

Use a program which generates geometry of gears by specified parameters - this way is describes in this video instruction.

Software used in this instruction: Gear Generator - this is not free software.

This product allows to create models the way similar to solid modeling - but more simple.

Version 6 has a great new feature - export 2D geometry on a workplane, this feature is used in the instruction.

Netfabb Basic - this is free software which allows to fix STL-geometry or rotate parts.

KISSliser - this is free software (with additional features available in purchased version).

Prepare STL-geometry for 3D printing - slices and translates to G-codes.

Gear Software Download Step 1

Add Tip Ask Question Comment Download Step 1: Video Instruction Add Tip Ask Question Comment Download.

This addon for Blender EXPLICITLY creates involute gears (just tested on the latest version of Blender as of this writing: 2.76b.

Working. Its NOT the default addon.

More info here: and here: Download here: Youtube - Default (built-in) Add Gear option (may be all you need): 0 revrekad unkerjay.

Also great to be able to make bevel gears - which is usually challenging task.

Involute gears are especially good when you print relatively medium or large gears because - deviations during printing degrade involute contour (at least on my printer).

This would be really nice to have such option as a pair of gears generation as Gear Generator has.

In my research, I came across this: Now THIS guy KNOWS gears (AND Blender) A beautiful, functional, if not (his words, real world) work of art.

I meant more in reference to ME than you.

Thank you for this information I do not know much about gears.

I just learn some theory while playing with OpenGL within my example program, which can also generate simple spoor gear geometry.

Gear Generator Software