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CNC template · Workshop
Centre finder for round stock
Square with two plugged-on fence strips and a slot on the bisector: put it against round stock, a pipe or a turning blank, draw a line twice, and the crossing point is the centre.
- Size
- 161 × 163 mm, 6 mm thick
- Material
- Plywood
- Difficulty
- Beginner
- Milling time
- approx. 8 min
- Bits
- V-bit 60°, End mill Ø 3.175 mm
- Customise
- Size, text and details adjustable with sliders
- With a laser
- diode laser from about 10 W (cuts 6 mm)
Try it without an account · carve with Chrome or Edge · no installation
Build instructions
Materials and accessories
| Qty | Part |
|---|---|
| 1 | Wood glue (water-resistant D3) |
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 the centre line, mill the mortises and the pencil slot, then cut out the square and the strips.
- Free the parts at the holding tabs with a utility knife or fine saw and sand the tab remains flush.
- Before gluing, dry-fit everything. If a joint is too tight, increase the clearance by 0.05 mm and carve the part again; if it wobbles, reduce it.
Assembly and final touches
- Glue the two strips with their tenons into the square from below; they form a right angle whose vertex lies on the centre line.
- Press the centre finder with both strips against the round stock and draw a line through the slot. Turn it by about 90° and do it again: where the lines cross is the centre.
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.
