Filleted Counterbored Mounting Block

Create the outer block first, then add all features as separate sequential operations. Create a solid rectangular block with outer dimensions 40.5 mm (X) × 35.2 mm (Y) × 29 mm (Z). Define axes: X = width (40.5 mm), Y = depth (35.2 mm), Z = height (29 mm). Add the Y‑axis through‑hole: Add a 6.5 mm diameter cylindrical through‑hole running along the Y‑axis, starting at the front face and exiting the back face, centered at X = 12 mm, Z = 15 mm. Add two Z‑axis through‑holes as a pattern: Add two identical 8.2 mm diameter cylindrical through‑holes running along the Z‑axis, from the top face to the bottom face, all at X = 28 mm, with Y‑coordinates: – 12 mm – 23.2 mm Add concentric counterbores as a second pattern: At each of those two positions, add a concentric blind counterbore with 18.5 mm diameter, running along the Z‑axis, starting at the top face and extending 12 mm downward. Apply fillets only after all holes are complete: Apply 2 mm fillets to all external edges except the bottom edges. Apply 1 mm fillets to all bottom external edges to maintain a more square appearance. Ensure the model is a solid, fully manifold, support‑free FDM‑printable geometry.

Parameters

Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.