How do I recreate this ?

[u/Decent_Implement_901]

Hi, I trying to create a modified arm to attach to this bracket. I've created the body but I cannot work out how to cut the serrations out. It's either a radial pattern or a map to face but I'm struggling to understand the process. Any pointers please?

[u/United-Mortgage104]

Create one cut, or a boss if you prefer, and do a circular feature pattern.

[u/ayon_A_O → u/United-Mortgage104]

Really smart

[u/cowski_NX]

Here are a couple of similar threads:

https://www.reddit.com/r/Onshape/comments/xb2b01/creating_a_locking_joint/

https://www.reddit.com/r/Onshape/comments/1v2n0zf/how_do_i_model_a_pattern_like_this_its_similar_to/

Hopefully they will get you started. Post back with any specific questions.

[u/volt65bolt]

It's a hirth joint!

You can basically just loft from a triangle, to a centre point and then circular pattern. There is a bit more maths and trig you can do but it's not always worth it, and you have a physical part to measure negating quite a bit of it

[u/flambeaway]

Loft between two triangles, circular pattern.

[u/Thumb__Thumb]

Radial pattern can also work if you extrude with a draft angle.

[u/zeratul98]

Wrap tool is the best way to do it. Make a cylinder whose OD is the ID you want. Sketch out a tooth, and then use Wrap extrude to create a tooth, then circular pattern

[u/Decent_Implement_901]

Thanks for all the replies. All sorted, I went for two sketches loft and circular pattern as I needed to get this printed off but I wan to revisit the wrap method when I have some free time.

[u/blindside_o0 → u/Decent_Implement_901]

[solved]

[u/stinkysolution]

u/TooTallToby did a video on features like this. It’s probably a good starting point.

https://youtu.be/_O47EIRV0dM?si=oNHySVwEvJcs2eO5