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MAXMAKE CNC Blog

[CNC Metalcraft] Machining an Aluminum EDC Playing Card with MAXMAKE HiMill D1S

by CHENmaxmake 08 Jun 2026 0 comments
[CNC Metalcraft] Machining an Aluminum EDC Playing Card with MAXMAKE HiMill D1S

Coins are cool. But let's make something different. Today, we're pushing the HiMill D1S to make an aluminum EDC playing card. Let's turn cold metal into a pocket fidget toy where every engraved line says "this is mine."

I. Project Overview

Project Name DIY Aluminum EDC Playing Card & Slider
Equipment Used MAXMAKE HiMill D1S Desktop CNC
Core Principles High-Precision Aluminum Relief Engraving + Standardized Post-Processing
Use Case
EDC fidget toy, desktop display, custom gift
Difficulty Level Advanced (Great practice for flat relief machining)
Cycle Time Approx. 7 Hours

II. Prep & Design

The secret to a good EDC card is good feel and clean details. Plan your layout and chamfer settings ahead of time — it'll save you hours.

1. Materials List

Aluminum Blanks: 100x40x10mm and 48x40x10mm aluminum blocks.
Polishing Supplies: Assorted sandpaper (400-2000 grit), metal polishing compound, buffing pads.
Accessories: 3D Edge Finder Probe, 4mm Collet, 3.175mm Collet.

2. Tooling Selection (High-Speed Aluminum Set)

3.175mm 3-Flute Spiral End Mill: Dedicated for aluminum roughing and outer profile cutting.
1.5mm 3-Flute Spiral End Mill: Used for internal pocketing.
20° 0.2mm Flat Bottom Engraving Bit: For fine detail relief work (suits, numbers, etc.).
2mm Ball Nose End Mill (R1): For final contour cut and edge chamfering.
Tooling and materials required for CNC machining an aluminum EDC card on the HiMill D1S.

III. CAM Settings (Machining Parameters)

These parameters are tuned for aluminum. With small tweaks, they work for most relief patterns.

A. EDC Card Machining

Tool: 3.175mm 3-Flute Spiral End Mill (Metal Roughing)

Stepover (Ae): 1.5 mm

Stepdown (Ap): 0.2 mm

Cutting Feed: 600 mm/min

Plunge Feed: 600 mm/min

Spindle Speed: 13,000 RPM

Tool: 20° 0.2mm Flat Bottom Engraving Bit (Relief Details)

Stepover (Ae): 0.1 mm

Stepdown (Ap): 0.2 mm

Cutting Feed: 300 mm/min

Plunge Feed: 300 mm/min

Spindle Speed: 13,000 RPM

Tool: 2mm Ball Nose End Mill (Edge Chamfering)

Plunge Feed: 300 mm/min

Spindle Speed: 13,000 RPM

B. EDC Slider Machining

Tool: 3.175mm 3-Flute Spiral End Mill (Surfacing)

Stepover (Ae): 1.5 mm

Stepdown (Ap): 0.2 mm

Cutting Feed: 600 mm/min

Plunge Feed: 600 mm/min

Spindle Speed: 13,000 RPM

Tool: 1.5mm 3-Flute Spiral End Mill (Inner Pocketing)

Stepover (Ae): 0.675 mm

Cutting Feed: 500 mm/min

Plunge Feed: 500 mm/min

Spindle Speed: 13,000 RPM

Tool: 2mm Ball Nose End Mill (Chamfering)

Plunge Feed: 300 mm/min

Spindle Speed: 13,000 RPM

CAM software settings for 3D machining custom aluminum EDC cards.

IV. Machining Process

The HiMill D1S keeps flat relief accurate to within microns.

1.
Workholding: Secure the aluminum plate to the wasteboard with tape and CA glue. Use edge stops to prevent shifting.
2.
Roughing: Use the 3.175mm end mill to clear bulk material and rough out the card's rectangular base.
3.
Relief Finishing: Swap to the 20° 0.2mm flat bottom engraving bit to reproduce the suits, numbers, and geometric textures. The lines will come out crisp and burr-free.
4.
Contour Cut: Use the 2mm ball nose end mill to cut the outer profile and add a smooth fillet.

V. Post-Processing

A clean post-processing workflow gives you industrial precision with a smooth finish.
1.
Deburring: Start with 400-grit on the edges to remove cutting marks. Switch to 800-1200 grit to smooth the fillets.
2.
Cleaning: Wipe the surface with alcohol to remove residual chips and cutting oils.
3.
Polishing (Optional): Apply metal polishing compound with a soft cloth to buff the aluminum, elevating its premium feel.
4.
Detail Adjustment: Use a fine needle to clean polishing residue from the relief pockets.



VI. Final Showcase: A Card That Says It All

When warm aluminum is reborn through precise CNC carving, an EDC playing card that blends practicality with visual appeal finally reveals its crisp, rugged texture:

Crisp Details: Clean lines, sharp engravings — classic card elements with an industrial edge.
Smooth Edges: Sanded and filleted edges sit comfortably in your hand with no sharp spots.
Metallic Feel: Polished aluminum with a cold luster — solid weight, but still feels handmade.
Versatile Usage: Perfect as a daily pocket fidget toy or a desktop display. Every detail showcases personality and taste.

📥 Get the Files & Start Making

Ready to test your machine on metal? Download the blueprint files and build your own industrial EDC card!

Download via Google Drive
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