CNC Routing a Guitar Body: Templates, Pocket Roughing, and Finish Passes on a Desktop Router

This site already covers laser-engraving a guitar's cosmetic details — headstock logos, pickguard etching, body artwork. Routing the actual body is a different job entirely: real material removal, pocket depths that have to match pickup and control cavity dimensions exactly, and a toolpath strategy that has to survive hardwood without tear-out on a desktop machine. This guide covers the CNC side — templates, roughing and finishing toolpaths, and pocketing for pickups and electronics — on a desktop router like the Wolfpawn 4040 Pro, working from either a purchased template file or your own design.

Getting a Body Outline and Pocket Layout

Unless you're designing a fully original body shape, start from a known-good template rather than reverse-engineering dimensions from a photo — pickup routes and neck pocket dimensions need to be accurate to a fraction of a millimeter for the hardware to actually fit. Vector guitar body templates (Stratocaster, Telecaster, Les Paul-style, and many original designs) are widely available as DXF or SVG files, and several CAD/CAM packages covered elsewhere on this site — FreeCAD for a free parametric option, or Fusion 360 if you want integrated CAM in one package — can import and clean these up.

• Verify hardware dimensions before finalizing pockets. Pickup cavity depth and width vary between humbucker, single-coil, and specific manufacturer designs — measure your actual hardware (or pull exact specs from the manufacturer) rather than trusting a generic template's cavity dimensions.
• Plan the control cavity and wiring channel together. Route the electronics cavity, pickup routes, and the connecting wire channel between them in the same setup if possible — reclamping and re-zeroing between operations is where alignment errors creep in on a project this dimensionally sensitive.
• Neck pocket depth and angle matter more than anything else on the model. A neck pocket that's too deep, too shallow, or not perpendicular to the body's centerline causes action and intonation problems that are difficult to fix after the fact — double-check this dimension against your specific neck before cutting.

Toolpath Strategy: Roughing, Then Finishing

StageToolpath TypeBitNotes Body outline roughingProfile/contour, multiple shallow passes1/4" or 1/2" upcut spiralLeave 1-2mm stock for a finishing pass; never try to cut the full outline depth in one pass on hardwood Body outline finishingProfile, single clean pass at full depthDowncut or compression bitDowncut gives a cleaner top edge — critical since this is a visible, handled surface Pickup/control cavitiesPocket clearing1/4" flat-end millClimb milling for the final pass reduces tear-out on cavity walls Cavity floor finishingAdaptive/raster finishing pass at target depthSame bit, light stepoverFloor should be flat and consistent — electronics and shielding sit directly on it Neck pocketPocket clearing, precise depth control1/2" or 3/4" flat-end millThis is the highest-precision cut on the whole project — take it slow

Use tabs on the outline's finishing pass to keep the body attached to the spoilboard/waste stock until you've completed all your pocketing — cutting the outline free first, then trying to route pockets in an unsecured or re-clamped blank, reintroduces exactly the alignment error you avoided by doing everything in one setup. See this site's Using Tabs Effectively guide for sizing and placement.

Material Choice and Grain Direction

Guitar body woods (alder, ash, mahogany, basswood) cut differently than the plywood and MDF most desktop CNC content defaults to. Reference this site's Wood Species Guide for CNC Routing for hardness and grain behavior specifics, but the practical points for a guitar body: run climb milling on the final finishing pass wherever grain direction changes around a curved outline, since conventional milling into end grain on a curve is where you get the worst tear-out; and keep chip load appropriate for hardwood species — ash and hard maple need slower feed or higher RPM than pine or basswood to avoid burning or excessive tool wear. See this site's CNC Feeds and Speeds guide for calculating chip load by species.

Workholding for a Body Blank

A guitar body blank is a large, thin, dimensionally-important workpiece — vacuum hold-down (if your table supports it) is ideal since it leaves the entire top surface free of clamps for the finishing pass. Without vacuum, use tabs on the outline plus screws or clamps placed only in areas that will be removed during pocketing (inside what becomes waste material) so nothing interferes with the tool's path. Plan clamp positions on the CAD model before you start cutting, not on the fly.

Safety Notes

This is a deep, multi-hour hardwood job on a desktop router — dust collection matters more here than on typical sign or coaster work, since sustained hardwood routing generates significant fine dust; run real chip/dust extraction, not just a shop vac hose loosely near the bit. Verify your machine's spindle/router can sustain the RPM and chip load your feeds-and-speeds calculation calls for over a long continuous job without overheating, and never leave a multi-hour job unattended near flammable dust buildup. See this site's general CNC Router Safety guide for workholding-failure and kickback fundamentals that apply to any job this size.

Routing a guitar body on a desktop CNC is a genuinely satisfying application of everything this site covers about feeds, speeds, pocketing, and workholding — get the neck pocket and pickup cavity dimensions right against your actual hardware, keep the blank secured through every operation in one setup, and you'll end up with an instrument-grade result a desktop machine wouldn't seem capable of on paper.