[Metal CNC] How to Machine an Aluminum Tactical Karambit on the HiMill D1S
![[Metal CNC] How to Machine an Aluminum Tactical Karambit on the HiMill D1S](http://maxmake.com/cdn/shop/articles/maxmake-himill-d1s-cnc-machined-aluminum-karambit_005a536b-d242-416d-9115-cb7d21ff5266_1100x.webp?v=1783151345)
A desktop CNC isn't just for wood anymore. Today, we're pushing the HiMill D1S to machine high-strength aluminum — turning a cold metal block into a tactical Karambit you can spin in your palm.
I. Project Overview
| Project Name | DIY Solid Aluminum Tactical Karambit |
|---|---|
| Equipment Used | MAXMAKE HiMill D1S Desktop CNC |
| Core Principles | 2D Profile Cutting + 3D Surfacing + Anti-Slip Texturing + Ergonomic Finger Grooving |
|
Use Case
|
EDC Pocket Fidget Toy, Desktop Art Display, Tactical Collection |
| Difficulty Level | ★★★★☆ (Advanced: Key focus on metal cutting parameters and multi-operation alignment) |
| Cycle Time | Approx. 34 Hours |
II. Prep & Design
The key to a great Karambit design is the feel and balance. During the CAD modeling phase, we specifically enhanced the depth of the finger grooves and the roundness of the tail ring.
1. Materials List
2. Essential Tooling (For High-Precision Metal Machining)
III. CAM Settings (Machining Parameters)
For aluminum, the rule is: high RPM, low feed, shallow passes. This prevents tool breakage and gives you a clean surface finish.
1. Outer Profile Roughing
Tool: 3.175mm 3-Flute Spiral End Mill
Stepover (Ae): 1.27 mm (45% of tool diameter for efficiency & finish)
Stepdown (Ap): 0.2 mm
Cutting Feed Rate: 600 mm/min
Plunge Feed Rate: 600 mm/min
Spindle Speed: 13,000 RPM
2. Finger Groove 3D Surfacing
Tool: 2mm Bullnose End Mill (R0.3)
Stepdown (Ap): 0.05 mm (Tiny stepdown is crucial for a silky feel)
Cutting Feed Rate: 400 mm/min (For harder stock, reduce to 150-200 mm/min)
Plunge Feed Rate: 400 mm/min
Spindle Speed: 13,000 RPM
IV. Machining Process
The HiMill D1S handles both soft and hard materials with no trouble.
V. Post-Processing & Assembly
This step takes it from "machined part" to "finished piece."
VI. Final Showcase: Cold Steel, Fingertip Feel
When the Karambit sits on your desk, the CNC tool marks and cold metal finish make a statement. It's not just a symbol — it's a maker's badge of honor.
📥 Get the Project Files
Ready to test your desktop CNC on solid metal? Download the blueprint files and machine your own Karambit!
Download via Google Drive
HiMill D1 Desktop CNC Machine
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