F4JWJ, Pierre on Nostr: npub16jupx…ry8u7 npub1wjtfg…74ya3 You can make the full 360" sketch then extrude, ...

npub16jupxu70nh0pg0wt4maseaf2fg3kv2tgcjal2kaaunms2ltdaxysdry8u7 (npub16ju…y8u7) npub1wjtfgz5yj0xkwckfmq5w7zdq4ftzghr5fkl9y6atw0dqta792d4qy74ya3 (npub1wjt…4ya3)
You can make the full 360" sketch then extrude, or, more efficienly :

1) Draw one series of closed concetric arce.
=> you get 1/8th of the arcs.

2) Mirror w.r.t. a 45° construction line starting at 0.0.

3) Add the hole on the diagonal.

=> You have 1/4th of the part.

4) Mirror w.r.t x

5) Then mirror the result again, but w.r.t. y.

6) Add the otline (centered square) of the part.

7) Extrude.

8) Proudly admire the result ! 🙂