Drawing helical internal gear

[Nutria360]

Hi! I've been trying to model this internal gear using the helix command and the tooth profile, but I'm getting this error. Can someone explain how I can properly create this internal part? Thank you.



And here is the 3D model....



and the result....

 

[MintJulep]

Looks like the face you're applying the helix to isn't perpendicular to the bore.

 

[Toost]

simplest is to draw a line in the center of the hole. ( = the centerline) Then sweep using your profile , use the center line as the (1) guide string .use angular law. Linear. 0 -20degrees ( ?)
( tick the preserve shape for better faces.)

 

[Toost]

btw, I assume you have used the Swept feature for the example in the pictures.
The missing specification there is the orientation of the section along the guide, some variable must be added to "tell the section to rotate when it follows the guide".
this is what the "Orientation method" specifies, the one used in your example is probably "fixed" . (?)
Another option is to add another helix, the orientation will then be from "guide to guide".