How to Hand Drill a Guitar Pedal Enclosure

Drilling an aluminium enclosure by hand is one of the most nerve-wracking parts of a pedal build. One slip and you have a wonky hole that no amount of filing will fix. The good news is that with a proper template, a decent center punch, and a bit of patience you can get drill-press-quality results without spending a fortune on tooling.

This guide walks through the full process — from designing your layout digitally to punching and drilling clean, accurate holes every time.

Step 1 — Design your layout

Use Stompbox Layout to place every hole with millimetre precision. Choose your enclosure preset (125B, 1590B, 1590BB, etc.), drop in holes for your 3PDT switch, jacks, pots, LED, DC jack, and anything else your build needs. The visual editor lets you nudge positions until the spacing looks right and nothing will foul the PCB inside.

You can also import SVG images into your layout. This is great for dropping in to-scale outlines of knobs, jacks, switches, and other components so you can check clearances before you drill. A resource like the Pedal Builder’s Vector Pack v2.0 includes a huge library of common pedal components drawn to scale — really helpful for making sure nothing overlaps and everything fits inside the enclosure with room to spare.

Getting this right on screen means you only drill each enclosure once. Accurate, repeatable drill templates are the single biggest upgrade you can make to your build process.

Step 2 — Export and print your PDF template

Export your layout as a PDF from Stompbox Layout — see the user guide for a walkthrough of the export options. The PDF includes the top face with crosshair markings for every hole centre, plus fold-down side panels that wrap around the enclosure walls.

Print at 100% scale. Do not let your printer “fit to page” or scale the output. Check the dimensions with a ruler against the known enclosure size before you commit to cutting.

Step 3 — Cut out the template

Cut along the outer edges of the template with scissors or a craft knife. Keep the side panels attached — you will fold these down later.

Step 4 — Tape the enclosure

Cover the top and sides of your enclosure in low-tack masking tape. This gives the template something to grip, protects the surface from scratches while you work, and makes pencil markings easy to see. Standard painter’s tape works well.

Step 5 — Mark the centre point of the enclosure

You need a reliable centre reference so the template sits dead-on. Two methods work well:

• Measure and square — measure the width and length of the top face, halve each, and use a set square to draw a short cross at the centre.
• Diagonal method — draw a straight line from corner to corner in both directions. Where the diagonals cross is dead centre.

Step 6 — Align the template to the enclosure

The PDF template has a small square cut-out in the centre with alignment lines extending outward. Cut out this small centre square, then position the template on the enclosure so that the alignment lines on the paper line up exactly with the centre markings you just made.

Take your time here — this alignment determines the accuracy of every hole.

Step 7 — Fold and secure the template

Fold the side panels down over the enclosure walls and tape them firmly in place. The wrapped panels lock the template so it cannot shift while you punch and drill. A couple of strips of masking tape on each side is enough.

Step 8 — Centre punch every hole

A good centre punch is critical. A mechanical (spring-loaded) punch is far more accurate than a hammer-and-pin style because you can position it with one hand without any impact disturbing your aim. The Starrett 18A is an excellent choice — precise, well built, and worth the investment.

For each hole:

1. Rest the punch tip lightly on the centre of the crosshair printed on the template.
2. Spin the enclosure slowly while looking closely at the punch tip. Spinning lets you verify the tip is centred on both axes — any offset becomes obvious as the crosshair rotates around the tip.
3. Once you are satisfied the tip is dead-centre, press to fire the punch.
4. Check the resulting dent. Give it a second punch if you want a deeper, cleaner starting point for the drill bit.

Work through every hole on the template before moving on. Double-check your punches — a solid dent now saves a wandering drill bit later.

Step 9 — Drill pilot holes

Pilot holes are crucial. Skipping straight to a large bit is the fastest way to ruin an enclosure — the bit will wander off the punch mark and the hole will end up oversize or off-centre.

The Dremel drill press setup

Ideally you would use a full-size drill press, but a brilliant cheap alternative is a Dremel rotary tool paired with two accessories:

• Dremel Multi Chuck — lets you use standard round-shank drill bits instead of the Dremel collet sizes.
• Dremel 220 Workstation — a compact drill press attachment that holds the Dremel vertically and provides a lever-action plunge. It is an excellent, cost-effective way to drill perfectly perpendicular pilot holes without a full workshop drill press.

Drilling technique

• Use good quality, sharp drill bits. Cobalt high-speed steel (HSS-Co) bits are a great option for aluminium — they stay sharp longer and cut cleaner than standard HSS.
• Start with a 1.5 mm pilot, then step up to 2.5–3 mm with the Dremel press.
• Keep the speed low. Stick to speed setting 2 or 3 on the Dremel. High RPM generates heat, which gums up aluminium and dulls bits fast.
• Take small bites. Plunge gently, back off to clear swarf, plunge again. Do not try to force all the way through in one go.

Step 10 — Step drill to final size

Once every hole has a clean 2.5–3 mm pilot, switch to a hand drill with a step drill bit (also called a Unibit). A step bit starting at 3 mm and incrementing in 1 mm steps up to 12 mm will cover virtually every common pedal component:

• LEDs — 5 mm
• Toggle switches — 6 mm
• 3PDT footswitch — 12 mm
• Potentiometers — 7–8 mm
• Quarter-inch jacks — 10 mm
• DC power jack — 12 mm

The step bit follows the pilot hole perfectly, widening one increment at a time. Go slowly, check the size after each step, and stop as soon as you hit the diameter you need. Deburr each hole with a countersink bit or the back edge of a larger drill bit.

Summary

1. Design your layout in Stompbox Layout
2. Export and print the PDF at 100% scale
3. Cut out the template
4. Mask the enclosure with low-tack tape
5. Mark the enclosure centre
6. Align the template using the centre cut-out
7. Fold side panels down and tape in place
8. Centre punch every hole (spin to verify alignment)
9. Drill pilot holes with a Dremel + 220 Workstation
10. Step drill to final size with a hand drill

Take your time with alignment and punching — those two steps determine the accuracy of everything that follows. With a good template and a methodical approach, there is no reason hand-drilled enclosures cannot look just as clean as CNC-machined ones.

Don’t want to start from scratch? Browse the drill template collections for ready-made layouts you can clone and customise.