How to create a 'rabbit' or 'rebate' where two shells fit together?

ben_terry323

I'm modelling half of a shell that I plan to 3D print twice and then fix together, back-to-back. Where the two halves meet, I want a couple of mm or so of one half to fit inside the other. In other words, I want to create a 'rabbit' or 'rebate' on the outside edge of one shell, and on the inside edge of the other. How do I do this?

Matt_Shields

One solution would be:

• sketch
  
• use
• extrude surface
• thicken add
• boolean subtract

https://cad.onshape.com/documents/b9ee996578adf250836cf5a9/w/1eefd1de5a773227019fd320/e/daf16ba92d946e556687eb81

Matt_Shields

Have you tried Split Part?

https://cad.onshape.com/help/Content/splitpart.htm

ben_terry323

Thanks, yes I've worked out how to split my part, but not how to create that rebate where the two parts are split - how did you do that?

ben_terry323

https://cad.onshape.com/documents/f2ac6042fa0558af8e705784/w/f31fc257a0ff3fbe7046a14f/e/2cf22812511413fe739647e7?renderMode=0&uiState=667d288a4c9f607856896472

Matt_Shields

One solution would be:

• sketch
  
• use
• extrude surface
• thicken add
• boolean subtract

https://cad.onshape.com/documents/b9ee996578adf250836cf5a9/w/1eefd1de5a773227019fd320/e/daf16ba92d946e556687eb81

ben_terry323

Matt_Shields said:

One solution would be:

• sketch
  
• use
• extrude surface
• thicken add
• boolean subtract

https://cad.onshape.com/documents/b9ee996578adf250836cf5a9/w/1eefd1de5a773227019fd320/e/daf16ba92d946e556687eb81

Thanks so much - precisely what I was looking for.