3D Printing Meets Woodworking

The FDM (Fused Deposition Modelling) 3D printer might seem like an unlikely addition to a woodworking shop, but it has become one of the most practical tools in the modern hobbyist's arsenal — not for making finished pieces, but for making everything that supports making finished pieces.

Why Woodworkers Print

Woodworkers don't 3D-print furniture. They print the things that make furniture possible:

Jigs and Fixtures

Drill guides — Print a block with a hole at exactly 15° for angled dowel joints
Router templates — Curved or complex-profile templates that would take hours to make from MDF
Clamping cauls — Curved cauls that distribute pressure evenly when gluing bent laminations
Hinge mortise jigs — Perfectly sized for specific hinges, with built-in depth stops

Workholding

Custom bench dogs — Sized to fit your specific bench dog holes
Soft jaw inserts — For holding irregularly shaped pieces in a vise without marring them
CNC workholding — Vacuum pods, eccentric clamps, and toe clamps designed for your specific CNC table

Functional Hardware

Knobs and pulls — Drawer pulls, cabinet knobs, and furniture handles in any shape
Organisational inserts — Custom dividers for drawers, trays for small parts
Dust collection adapters — Fit any hose to any tool with a printed transition piece
Replacement parts — Knobs, handles, and fittings for tools whose manufacturers have gone out of business

Material Choices for Shop Use

Material	Strength	Heat Resistance	Best For
PLA	Moderate	Low (60°C)	Templates, organisational items
PETG	Good	Moderate (80°C)	Jigs, fixtures, outdoor use
ABS	Good	Good (100°C)	Parts near heat sources
Nylon	Excellent	Excellent	High-stress mechanical parts
TPU	Flexible	Moderate	Soft jaws, vibration dampening

For most woodworking jigs, PETG offers the best balance of strength, ease of printing, and cost.

Design Workflow

Identify the problem — A repetitive setup, an awkward clamping situation, a missing part
Measure precisely — Callipers are essential; every dimension matters
Model in CAD — Fusion 360 (free for hobbyists), TinkerCAD for simple items, or OpenSCAD for parametric designs
Slice and print — 0.2mm layer height is adequate for most shop fixtures
Test and iterate — Print a test fit before committing to the final version

The entire cycle from problem identification to working fixture typically takes 2–4 hours, including print time.

Real-World Examples

The Perfect Dovetail Marker

Print a saddle-shaped guide that sits on the end of a board and provides knife lines at exactly 1:6 (softwood) or 1:8 (hardwood) ratio. Cost: $0.30 in filament. Equivalent commercial brass marker: $45.

CNC Spoilboard Inserts

Print threaded inserts that press-fit into a CNC spoilboard, providing anchor points for workholding. When they wear out, print more. Cost: pennies each.

Dust Port Universal Adapter

A parametric adapter (designed in OpenSCAD) that transitions between any two diameters of dust collection hose. Share the file, change two numbers, print for your specific setup.