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CNC template · Workshop
Twist drill grinding gauge
Two gauges for regrinding twist drills: notch and edge at 118° for steel and wood or 135° for hard materials, plus a millimetre scale to check that both cutting edges are equally long.
- Size
- 106 × 100 mm, 3 mm thick
- Material
- Acrylic (PMMA)
- Difficulty
- Beginner
- Milling time
- approx. 9 min
- Bits
- V-bit 60°, End mill Ø 2 mm
- Customise
- Size, text and details adjustable with sliders
Free with an account · carve with Chrome or Edge · no installation
Build instructions
Materials and accessories
| Qty | Part |
|---|---|
| 1 | Key ring |
Also: sandpaper (grit 120 and 240), a utility knife or fine saw and, for joints, a rubber mallet.
Carving and finishing
- Clamp the workpiece flat on the spoilboard or secure it with double-sided tape, and set the origin as shown in the carving assistant.
- Engrave scale and angles, mill the ring holes, then cut out the gauges.
- Free the parts at the holding tabs with a utility knife or fine saw and sand the tab remains flush.
- Only deburr the test edges so the angles stay true.
Assembly and final touches
- Put the drill with its shank against the long edge and hold the cutting edge against the angled edge: it must lie flat without a gap. Check both cutting edges one after the other; the scale shows whether they are equally long.
How to carve this template
- OpenOpen the template in the app and adjust size and text if you like.
- CheckLook at it in 3D, check run time and warnings.
- Set upThe carve wizard guides you through material, clamping, bit and zero point.
- CarvePress start; the app drives your Grbl router directly over USB.
