Brackets and mounts
EDC Multitool Simplified
- Bounding box
- 68.0 × 38.0 × 12.0 mm
- Engine
- Precision B-rep
- Parameters
- 23
- Published
- August 9, 2026
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Free to download and use. See the terms.
The prompt
Role and Task: You are an expert mechanical engineer specializing in metal additive manufacturing (Electron Beam Melting / EBM) and CAD modeling. Design a functional, 3D-printable EveryDay Carry (EDC) multi-tool modeled from scratch in a 3D format. Dimensional and Material Constraints:Maximum Outer Dimensions: Must strictly fit within 68 mm length x 38 mm width x 12 mm thickness (strictly under the 70 x 40 x 20 mm limit). Material and Weight: Optimized for Ti-6Al-4V Grade 23 Titanium (density = 4.43 g/cm^3) with a total weight under 40 grams. Manufacturing Process: Optimized for Colibrium Additive Arcam Q20plus EBM. Functional Features to Include:Key Ring Attachment: A dedicated 4 mm eyelet chamfered for key ring clearance. Integrated Hex Drivers: Clean cutouts for 5 mm, 6 mm, and 8 mm hex bolts.Bottle Opener: An ergonomic notch on the outer lower edge. Pry Bar / Flathead Driver: A tapered 45 degree reinforced pry edge at the front tip. Print-in-Place Carabiner Gate: A compliant spring clip integrated into the side body with a 0.8 mm clearance gap to prevent fusing during EBM printing. Additive Manufacturing Specifics (EBM Optimization):Weight Reduction: Replace dense solid sections with a hollowed central chamber featuring an open volumetric gyroid lattice structure to minimize material weight and showcase 3D printing capabilities. Powder Removal: Include two 3 mm powder drainage holes leading into the internal lattice cavity to allow unfused titanium powder evacuation. Self-Supporting Angles: Ensure all internal overhangs and chamfers maintain angles of 45 degrees or greater relative to the vertical Z-axis to eliminate internal support structures. Identification: Feature a debossed group identifier reading "GRP-XX" on the main face (0.8 mm depth, 1.5 mm line thickness). Safety Rules: All outer edges must have a 1 mm fillet or 45 degree chamfer; NO sharp blades, skewers, or knife edges (must comply with airport security and non-weapon regulations). Output Requirement: Generate the complete 3D feature tree, dimensional layout, and step-by-step CAD construction script (or direct 3D STEP geometry file instructions) reflecting these parameters.
Parameters
| Name | Value | Range |
|---|---|---|
| Overall Length | 68 mm | 50 – 70 |
| Overall Width | 38 mm | 30 – 40 |
| Overall Thickness | 12 mm | 8 – 20 |
| Wall Thickness | 1 mm | 0.5 – 3 |
| Pry Tip Length | 12 mm | 5 – 20 |
| Pry Tip Min Thickness | 1.5 mm | 0.5 – 5 |
| Bottle Opener Notch Width | 20 mm | 10 – 30 |
| Bottle Opener Notch Depth | 10 mm | 5 – 15 |
| Bottle Opener Notch Height | 5 mm | 2 – 10 |
| Keyring Hole Diameter | 4 mm | 3 – 6 |
| Keyring Hole X | 10 mm | 1 – 67 |
| Keyring Hole Y | 10 mm | 1 – 37 |
| Keyring Slit Width | 1.5 mm | 0.5 – 3 |
| Hex Driver Clearance | 0.2 mm | 0.05 – 0.5 |
| Hex 8 mm Wrench Size | 8 mm | 7.5 – 8.5 |
| Hex 8 mm X Position | 15 mm | 5 – 55 |
| Hex 8 mm Y Position | 19 mm | 5 – 33 |
| Hex 6 mm Wrench Size | 6 mm | 5.5 – 6.5 |
| Hex 6 mm X Position | 30 mm | 10 – 58 |
| Hex 6 mm Y Position | 19 mm | 5 – 33 |
| Hex 5 mm Wrench Size | 5 mm | 4.5 – 5.5 |
| Hex 5 mm X Position | 45 mm | 25 – 63 |
| Hex 5 mm Y Position | 19 mm | 5 – 33 |
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.
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