6-Degree Modified Mitre Box for Pinewood Derby – Hand Saw Cutting Jig (V1)

Print time: ~2.5 hours on a FlashForge printer using stock draft slicer settings

This is a 6-degree modified mitre box and cutting jig (V1) designed to guide hand saw cuts for creating wedge-style Pinewood Derby car profiles.

The design functions as both a mitre box (fixed-angle hand saw guidance) and a cutting jig, holding a standard Pinewood Derby block in alignment while providing a single angled guide surface to reduce freehand drift during cutting. Unlike a traditional multi-angle mitre box, this version is purpose-built for a single 6-degree cut and optimized for fast printing and simple setup.

This version was designed, printed, and tested during an actual Pinewood Derby build, and the included photos show real use and real results. It is not intended to eliminate sanding or finishing, but to provide a consistent starting cut that is significantly easier to refine than a freehand saw cut.

Print Info
Printed on a FlashForge printer
Approximately 2.5 hours total print time using stock draft slicer settings
Printed flat
No supports required
PLA worked well in testing
Increasing wall count or infill is recommended for added durability

Notes on V1
Proof-of-concept release
One thinner guide wall may fail under heavy force
A reinforced single-guide V2 is planned
Shared freely during derby season

Use
Designed for hand saws
Clamp the mitre box securely before cutting
Light sanding and finishing recommended after cutting

This design is intended for Pinewood Derby builders looking for a simple, fast, 3D-printable alternative to freehand cutting or power-tool setups.