A 3D Printed Keychain + Fidget Combo for DJ Lovers

So my brother, @droidsingh (also known as Amanjeet Singh), is one of the Founding Engineers at maestro.dev by day (sometimes night as well - timezones, am I right) & a full time music lover. As a hobby, he decided to start DJing almost a year back.

It was around that time when I joined him in the fully remote worker club as a Robotics Engineer. Rather than working from home, me (sometimes) and my brother (literally everyday) often work out of cafes nearby. One of those cafes, is well known for its exceptional cookies and weekly coffee raves with an hour-long DJ set. Seeing this as an opportunity to level up his DJing, he volunteered to play during one of those raves.

But, we wanted to take this up a notch and make it more than just another weekly DJ session. And at the end of all that, we wanted to give everyone something tangible to remember the event by. This is where my hobby of 3D printing came into play. And the result?

A 3D printed keychain that looks like a miniature DJ Console where the turntable actually rotates allowing the keychain to double as a fidget toy! This checked all the requirements of being: Something small. Something memorable. And something useful that people wont throw away the moment they leave the event.

Materials:

1. Black PLA Filament (Primary)
2. White PLA Filament (First Secondary)
3. Second secondary solor PLA Filament of your choice. In my case I selected: Red, Blue, Yellow and Purple
4. 1 x 608ZZ Ball Bearing per piece for the spinning disc
5. 1 x Keyrings for the keychain assembly (optional if you don't want to use it as a keychain)

Tools:

1. You need a 3D Printer that can print in multiple colors. I used the Bambu Labs A1 (http://bambulab.com/en-in/a1)
2. 1 x Rubber Mallet (for fitting the bearing)
3. Super Glue (for fixing the turntable inside the bearing)
4. 1 x Pliers (optional if you don't want insert the keyring to use it as a keychain)

Softwares:

1. You only need a slicer software for your 3D printer. In my case, we used the Bambu Studio

To enable the spinning of the DJ disc in this keychain, it was designed to be printed as 2 separate parts:

1. 1 x Main console base with the mock DJ console design and interfaces (DJ_Console_Base_v4.3mf)
2. 1 x Spinning Disc (DJ_Disc_v2.3mf)

Both prints need to be printed in 3 colors: Black, White and the second secondary color of your choice. The .3mf files for both the parts are attached with this Instructable and can be downloaded, sliced and printed directly.

Both the files were printed on standard infill settings and sliced by setting different colors as requried in Bambu Studio.

Once all the supplies and 3D prints are here, you can start with assembly which has 3 main steps:

1. Insert the bearing in the snap fit hole of the DJ Console hole using a rubber mallet
2. Apply some super glue on the curved surface of the cylindrical peg below the printed DJ Disc. Make sure you do not apply any super glue at the bottom surface of the cylindrical peg.
3. Insert it inside the bearing but do not push it all the way down. Hold it a bit raised from the surface of the DJ console base to allow it rotate freely after fixing.
4. Optionally, you can insert a keyring inside the dedicated keyhole on the console base using a set of pliers.

If need, a few wraps of masking tape can be applied to the cylindrical peg below the DJ Disc for a tighter fit and potentially fitting without/with lesser super glue.

Now comes the best part: enjoying your efforts! The keychain was very well received and all 50 pieces we printed and assembled were gone in a flash.

People especially enjoy the keychain + fidget combo as it becomes a great combo for long trips with your backpacks!

If you are someone who would love to make this, do share the photos of your end product. I would love to see the different combos and versions of this project. If you have any reviews or feedbacks, feel free to drop a comment here.

This is instructable is also a part of the Rainbow Contest. Consider giving it a vote if you liked the project!