Precision Gears | CAD Precise Parametric Involute Gears

Full Showcase Video

I show a lot more In here.

—TLDR read the bold text.—

Precision Gears is a blender addon developed to bring an array of mathematically accurate involute gears to the precision world of Blender. Not only that, it’s all incapsulated inside the closest thing to a parametric system, in blender giving you the ability to change your gears on the fly.

Paid Precision Gears
Free Precision Gears Lite
*Lite has reduced features but is still parametric and useful.

(Blender Market)
Coming soon…

This is a “beta” release some pretty big & exciting changes will be coming to the addon in the next coming months (See below). Plus a whole bunch of videos and a full wiki eventually. In the time being if you find any consistent bugs that you are able to replicate or have any future development ideas I would love to hear from you.

The best place is in the maker tales discord in the Precision Gears channel link: HERE. Alternatively, you can fill in this form: Here not reviewed as often and of course on this topic.

| Feedback Request |

I’m currently developing the gear “presets” if you have any ideas of how I should standardize these I would love to know your thoughts.

Gears & Features currently available:
precision gears lite only has the ones with (*)


  • Spur Gear *
  • Helical Gear
  • Herringbone Gear
  • Rack Gear
  • Internal Gear
  • Internal Herringbone Gear
  • Internal Helical Gear
  • Bevel Gear
  • Spiral Bevel Gear
  • Worm Gear


  • Center Extrusions
  • Set Screws
  • Cross Bore *
  • Round Subtract Bore (Set Screw) *
  • Round Additice Bore (Key) *
  • Polygon Bore ( Triangel / Hex etc.) *
  • Bore Previews *
  • Preset Creation
  • Global Scaling *
Coming Soon

The link shows the sneak peek section of the full video:

Testing at the moment:

  • Gears to keep material assignments when changing parameters
  • Internal gears outside perimeters perfectly round
  • Cross bore. XY parameters should be the total length of bore extrusion
  • Gear face chamfering/bevelling from tip (Spur, Internal, Helical, Herringbone, Rack)
  • Tooth crowning (Spur, Internal)
  • Tooth flank tip relief (Spur, Internal, Helical, Herringbone, Rack)
  • Tooth undercut (Spur, Helical, Herringbone)
  • Rounded tooth tips/reliefs (Spur, Internal, Helical, Herringbone, Rack)
  • Tooth flank base relief (Rack)

Deep Development

  • Powerful yet simple animation
  • Worm Wheel Gear
Parametric Settings Panels 0.0.6
Spur Lite






Full Video: