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How to extrude on a chamfer

I have a rectangular pocket with a 45-degree ramp (created via Chamfer 1). I am trying to extrude two rails (Extrude 3) from a sketch so that they stop perfectly flush against that 45-degree angled face

https://cad.onshape.com/documents/f138378d3eeb5b9aeec49c68/w/a5f7f83e253b1edfe9b89a97/e/e24ed7e6d5a6818bc513d557?renderMode=0&uiState=69b4ccbd489e10226b99ed87

Screenshot 2026-03-13 194144.jpg
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Answers

  • Ste_WilsonSte_Wilson Member Posts: 579 EDU

    Sketch on the sloped surface and extrude up?

  • robert_scott_jr_robert_scott_jr_ Member Posts: 763 ✭✭✭

    Hey Wiliam. Select that face you want to connect to the ramp and extrude it 'Up to face'. If you have trouble selecting it, turn off the planes and other sketches or right click while trying to select it and select 'Select other' from the drop down. - Scotty

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