GearHeads Forum

In the Lego technic universe, if I make a spur gear that is Mod 1.0, and the tooth count is divisible by 8, the spur gears will always work with the axle hole spacing of legos(8mm). I've made 16t all the way to 120t and they work perfectly. For what ever reason, with Helical gears, doing a 16t and ...

Thank you Art, my gears are currently printing from my method and will try them out(they are Lego Technic compatible). I MUCH prefer your way, thank you very much for the formula.
One more question Art, can I make a custom axle for Gearotic? Namely for the Lego technic shafts?

I am an airline pilot by profession, not an engineer, when I specify the amount of twist in the extrusion, for a 45 deg helix gear, what formula do I use? Obviously 45 degrees for twist is a few magnitudes too much.
Ok... I did a 3d Sketch, came up with 12.09475708 degrees.

Thank you Art, today I will learn how to do that in both Solidworks and Fusion.

Solidworks hangs trying to do anything with the 2d DXF of GM.

Both Solidworks 2019 and Fusion 360 show a corrupted gear. When playing with the demo, and reading the manual, it suggested that I could export a 3D solid I could further manipulate in my favorite 3D CAD package.
The helical gears I am generating are far too complex for Solidworks to convert into a ...