Herringbone Gear Collection with STEP files.

For a project, I required gears. My 3d modelling program (Shapr3d) does not support generating gears, so I had to search for existing models (creating them by hand is quite tricky, especially when they should reliably mesh).

I could not find any collection of gears that provided step files (stl/3mf are difficult to work with in most 3d modelling programs). There exist some that can be used to create stl/3mf files:

• https://www.stlgears.com/ • https://geargenerator.com/ • https://www.thingiverse.com/thing:6544 • https://www.thingiverse.com/thing:9454 • https://www.thingiverse.com/thing:24071

For Fusion360, there exists a plugin that can be used to generate gears https://apps.autodesk.com/FUSION/en/Detail/Index?id=1236778940008086660 and that is what generated the gears I uploaded here.

The gears were generated with the following settings:

• Standard: Metric • Fast Compute: ☑ • Helical System: Radial • Clock Wise: ☐ • Double Helical: ☑ • Module: 1mm • Number of teeth: Prime numbers between 7 and 100 • Gear height: 10mm • Pressure Angle: 14.5° • Helix Angle: 15.0°

There is one version where the gears are without holes in the center, and one that should fit on a Nema 17 motor.

The distance between two gears can be calculated like this:

(m * N1)/2 + (m * N2)/2

where m is the module, here it is 1, the N1 is number of teeth of the first gear and N2 the number of teeth for the second gear.

For example to mesh a gear with 11 and 41 teeth. You would calculate: (1 * 11)/2 + (41 * 1)/2 = 26.5mm

Design and description by Lucas , licensed CC0.