3D printed guitar pick: how to make it

A guitar pick is a bending beam held between two fingers. Four dimensions control how it behaves: overall thickness at the grip, thickness at the tip, the bevel angle at the tip, and the tip radius. Thickness at the grip sets stiffness. Most players land between 0.73 mm and 1.14 mm for a flexible rhythm feel, and 1.5 mm to 3.0 mm when they want a stiff, fast attack.

The tip is where tone is decided. A blunt tip with a 1.5 mm radius gives a rounder, darker attack. A sharp tip drags less across the string but wears faster and produces more pick noise. Bevel angle matters more than most people expect: a 30° bevel glides over the string, while a 45° bevel bites and adds brightness. Print three versions at 30°, 38° and 45° and play them before you commit.

Wall thickness is where printing differs from molding. In resin printing, keep the body above 0.8 mm so the part does not curl under finger pressure. In metal printing, keep it above 0.6 mm or the laser will leave a rough, porous skin on the thin side. If your design has a hole for a lanyard, keep 1.2 mm of material around it.

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  Grip thickness 0.73–1.14 mmFlexible, good for strumming.
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  Grip thickness 1.5–3.0 mmStiff, fast lead playing.
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  Bevel 30–45°Lower angle glides, higher angle bites.
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  Tip radius 0.3–1.5 mmSmall radius is brighter and wears faster.

Resin printing (SLA or DLP) is the right first step for most pick projects. Layer lines land at 25–50 μm, so a light sanding with 800 grit removes them. The material choice matters: standard resin is brittle and will chip at the tip within a few hours of hard playing. Tough or ABS-like resins survive much longer. Nylon-like resins give a slightly softer attack that many players prefer.

FDM printing works if you orient the part so layers run across the pick, not along its length. Print flat on the bed with the tip pointing sideways. If layers run tip to grip, the pick splits along the layer lines the first time it catches a string. Nozzle 0.4 mm, layer height 0.1 mm, and three perimeters minimum. FDM picks always need sanding, so budget that step.

Metal printing via DMLS or SLM is a different product. A titanium or stainless pick weighs more, rings brighter and lasts far longer than any polymer. The catch is cost and post-processing: a printed metal pick comes off the plate with a rough surface, supports attached, and needs support removal, bead blasting and edge polishing before it plays. Plan for a minimum feature of 0.6 mm and expect the bevel to need hand finishing to hit a consistent angle.

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  SLA/DLP resinBest finish out of the machine. Use tough resin, not standard.
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  FDMOnly if layers run across the pick. Sanding required.
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  DMLS/SLM metalHeavy, bright, durable. Needs supports removed and polishing.

Start with a 2D sketch of the outline, extrude it, then cut the bevel as a chamfer or a swept surface. Model in millimeters. Export STL at 0.02 mm linear deviation and 5° angular deviation; coarser settings turn the bevel into visible facets. If your printer software supports it, export 3MF instead and keep the units locked.

Orient the part so the bevel is not on the build plate. In resin, tilt the pick 10–15° and support it from the back face, never from the tip. In metal, print the pick standing on its long edge with supports on the flat faces. After printing, wash and cure resin for the full recommended time; under-cured resin stays soft and the tip deforms.

Finishing is where a printed pick becomes playable. Wet-sand the tip progressively from 400 to 2000 grit, then polish with a fine compound. Keep the bevel angle constant by sanding against a fixed block. For metal, bead blast the body for grip and leave the tip polished so it slides over the string. Check the tip under magnification; a rounded or chipped tip will sound dull.

Measure the finished part. Thickness should hold within ±0.05 mm across the grip, and the bevel angle within 2°. If you are making more than a handful, this is the point where machining takes over, because a CNC run holds those numbers without hand work on every piece.

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  ExportSTL at 0.02 mm deviation, or 3MF.
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  OrientationNever support the tip. Tilt resin 10–15°.
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  CureFull recommended time, or the tip deforms.
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  FinishWet-sand 400 to 2000 grit, then polish.

Printing wins on geometry freedom and on one-off cost. Machining wins on edge consistency, surface finish and repeatability. If you need 200 picks with an identical bevel and a tip that stays sharp, a printed batch will show variation from support marks and hand sanding. A machined batch will not.

For polymer picks, CNC machining POM, ABS or PC sheet is straightforward and gives a clean, burr-free edge at Ra 0.8–1.6 μm straight off the tool. For metal picks in 6061 aluminium, 316 stainless or TC4 titanium, machining lets you control the tip radius to ±0.005 mm and add a chamfer that printing cannot hold. Titanium picks in particular are usually machined, not printed, because the thin tip needs a controlled edge.

A practical hybrid: print five or six variants to settle the shape and thickness, then machine the final design in the material you want to sell. That keeps the iteration cheap and the production consistent. We run both routes, so the file you settle on can go straight into either.

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  Print for iterationCheap shape and thickness trials.
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  Machine for productionConsistent bevel, controlled tip radius.
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  MetalsAluminium, stainless, titanium machined to ±0.005 mm.