Jumbo Chicken-Head Knob overlay

by MustBeArt, published

Jumbo Chicken-Head Knob overlay by MustBeArt Nov 28, 2015
0 Share
Download All Files

Thing Apps Enabled

Order This Printed View All Apps



Design Tools


Liked By

View All

Give a Shout Out

If you print this Thing and display it in public proudly give attribution by printing and displaying this tag.

Print Thing Tag

Thing Statistics

357Views 162Downloads Found in Electronics


This is an extra-large pointer ("chicken head") style knob. I was afraid that mating the 3D-printed shape directly to a quarter-inch shaft wouldn't be strong enough, so this knob is an overlay for an existing commercial knob.

The original knob was one of these: https://www.sparkfun.com/products/9998

The "Basic knob cutout.stl" file is a plain 3D model of the bulk shape of the original knob, with no detailed features or shaft hole. The "Basic knob cutout with hole.stl" file is the same, but also includes a cylindrical protrusion from where the set screw is located on the original knob. In other words, it is the shape of the cutout needed on the bottom of the jumbo knob in order to fit over the original knob and allow access to the set screw. These files are provided in case you want to design a new knob; the cutout is already done in the main STL file, "Jumbo knob.stl".

The original knob fits very snugly in the cutout. Some force is required to insert it. You may find it helpful to warm up the printed part with hot water before inserting the knob.

This knob was created for the console of Organ Donor, http://organdonorproject.org

Print Settings

Printer Brand:










The cutout for the original knob requires support material, but the hole for access to the set screw does not. Use a brim to help anchor the edges of the round skirt.

The skirt bent upwards when the knob was removed from the heated plate. I soaked the knob in hot water to allow the skirt to relax into its flat as-printed shape.

The support material in the cutout has to be completely removed. Any remaining support material could prevent the original knob from going all the way into the cutout.

More from Electronics

view more

All Apps

Auto-magically prepare your 3D models for 3D printing. A cloud based 3D models Preparing and Healing solution for 3D Printing, MakePrintable provides features for model repairing, wall thickness...

App Info Launch App

Kiri:Moto is an integrated cloud-based slicer and tool-path generator for 3D Printing, CAM / CNC and Laser cutting. *** 3D printing mode provides model slicing and GCode output using built-in...

App Info Launch App
KiriMoto Thing App

With 3D Slash, you can edit 3d models like a stonecutter. A unique interface: as fun as a building game! The perfect tool for non-designers and children to create in 3D.

App Info Launch App

Print through a distributed network of 3D printing enthusiasts from across the US, at a fraction of the cost of the competitors. We want to change the world for the better through technology, an...

App Info Launch App

Treatstock is an online platform that offers decentralized manufacturing services such as 3D printing and CNC machining for clients all over the world. We offer free and instant access to comparati...

App Info Launch App

3D print your favourite design with NinjaPrototype, a professional 3D manufacture with consistent quality and speed.

App Info Launch App