21-Bit Drill Bit Case (1–13mm) with Automatic lift

See assembly instructions and printing suggestions pdf's

Model Description

This is a 21-slot drill bit storage case designed for metric drill bits from 1mm to 13mm.

The case features two internal hinged inserts:

-Front Insert: 16 drill bits (1mm – 8.5mm in 0.5mm increments)

-Rear Insert: 5 drill bits (9mm – 13mm) and lid

Both inserts are pinned into the case body and connected with mechanical linkage arms, allowing them to move together smoothly. When the lid is opened, an optional insert retainer linkage pulls the inserts upright, automatically presenting the drill bits for easy access. When the lid closes, the inserts fold neatly back into the case bottom.

This creates a clean, compact storage solution with a satisfying mechanical motion.

Design Concept

The goal of this design was to create:

-Compact footprint

-Clear drill size organization

-Mechanical presentation system

-Fully printable functional storage solution

-No additional Hardware

Mechanical Function

-Dual insert system keeps small and large bits separated.

-Linkage arms synchronize movement of both inserts.

-Lid-actuated retainer option creates automatic lift display.

-Pins act as simple hinge shafts.

-Inserts sit flush in the bottom when closed for compact storage.

This design combines tool organization with mechanical interaction almost like a precision tool case found in professional workshops.

Specifications

-Capacity: 21 drill bits Sizes:

-1mm to 8.5mm (0.5mm increments)

-9mm to 13mm

-Metric layout

-Designed for FDM 3D printing

-Pin hinge assembly

-Minimal supports required

Ideal For:

-Workshop organization

-DIY enthusiasts

-Mechanics

-Makers

-Tool storage upgrades

-Functional print collectors

Printing Recommendations

Case Bottom

-Wall Loops 4