Short-Point Colouring Pencil/Pencil-Crayon Sharpener Adapter

Certain brands of high-quality pencil-crayons (akacolouring pencils, if you're from outside Canada) have thick, fragile wax cores. These lay down great colour but they break or crumble if you use standard sharpeners.

While Prismacolor make a special short-point sharpener for their pencil-crayons, it's rather expensive and not always reliable. It uses roughly the same sharpening angle as jumbo pencils, and companies such as Staedtler and KUM make good quality dual-hole jumbo sharpeners quite cheaply.

These adapters help you keep narrow pencils centred in wide jumbo sharpener holes. I've made two angles:

• 26° for Staedtler sharpeners;
• 30° for KUM sharpeners.

The fit is approximate. Use whichever one feels like a better fit. The inner bore of the adapter should be a smooth running fit against the pencil to allow it to sharpen freely.

The pencil holder in the background is my make of Laurie Gellatly's Customizable fancy pencil holder with the following parameters:

number_of_pencils = 24; slope_angle = 25; pencil_diameter = 8.2; Print Settings ==============

Printer Brand:

Printrbot

Printer:

Rafts:

No

Supports:

Resolution:

0.2 mm

Infill:

Notes:

These don't need to be very solid, as you'll likely need to make a few as you wear through them, lose them, give them away, …

Category: Art Tools