how do we smooth out (blend?) the end of custom threads?

Christopher_Moutoulas

https://cad.onshape.com/documents/4a78f7e755a5111dd4258e3f/w/df3dcaedda26a1061a45278e/e/ac9d684610f36d623901440e

EvanReese

Will you make the model public? I can't access it. Here's a model showing are 3 different ways I've done it in the past:

1. Angle the flat end face and fillet it. I don't love how it makes it flair out, but it can work.
2. Use a revolve feature on the ends, then trim the excess and merge it in
3. Extrude the ends straight in the direction of the helix ends

S1mon

@EvanReese

#2 is the standard way that real injection molded closures are done. They use a rotating mill bit to make the features in the tool.

EvanReese

Will you make the model public? I can't access it. Here's a model showing are 3 different ways I've done it in the past:

1. Angle the flat end face and fillet it. I don't love how it makes it flair out, but it can work.
2. Use a revolve feature on the ends, then trim the excess and merge it in
3. Extrude the ends straight in the direction of the helix ends

MDesign

chamfer tool or possibly a conical fillet?

S1mon

@EvanReese

#2 is the standard way that real injection molded closures are done. They use a rotating mill bit to make the features in the tool.