Short-Point Colouring Pencil/Pencil-Crayon Sharpener Adapter

thingiverse

Certain brands of high-quality pencil-crayons (aka *colouring 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](https://www.thingiverse.com/make:525708) of Laurie Gellatly's [Customizable fancy pencil holder](https://www.thingiverse.com/thing:797104) with the following parameters: number_of_pencils = 24; slope_angle = 25; pencil_diameter = 8.2;