NASA Chainmail Fabric Bracelet M - Clasp - 20sizes

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Thank you for all the great feedback you've given on the previous versions. This version implements the following improvements:

Arachne slicer for slightly looser links and best finish.

Shorter clasp to minimize stiff section.

Improved bed adhesion by removing hollowed out center from underside.

Improved bed adhesion by increasing first layer surface area.

Improved strength by widening central post of links.

Description

NASA chainmail inspired bracelet with a hidden clasp. Perfect gift or handout to showcase interlocking parts in 3D printing. 

One print takes only ~45min to ~1.5h depending on the size. 30min test print keychain also included.

 

All sizes fit A1 Mini. To select your size, measure your wrist and select the next size up, maybe two sizes up if its close. If you need a longer size, feel free to request for one, or combine two shorter ones together.

 

Check the video in images to see the clasp in action. Familiarize yourself with the clasp before wearing and open and close it a few times to loosen initial stiffness.

Alternative uses:

Smaller sizes work great as wine glass markers and napkin holders. 116mm fits snug around LED tea lights (after some loosening).

Print preparations:

You can first check that your filament and bed adhesion work for this model by printing the keychain profile.

 

Filament: Use dry PETG, ABS or similar tough material. PLA also works very well but don't expect it to last as long in rough use.

Bed adhesion: Bed adhesion is critical for this print. I use Cool plate SuperTack for PLA and PETG without issues and suggest you do too. If using PEI plates, prepare better than ever: clean with detergent and brush, use brush also when rinsing well, careful use of adhesives etc. Monitor the print and try again if at first you don't succeed. You and your printer can do it!

Removal: Detach the finished print carefully with a scraper. Don't be tempted to rip the whole thing out from its end. For SuperTack, remember to keep the bed warm when detaching (~40'C for PLA, ~50-60'C for PETG).

Support: Remove the support material from the clasp. Check and clean the inside surface of the clasp.

Break-in: The links might be a little stuck at first. Loosen them up by moving adjacent pieces back and forth few at a time. Don't twist and bend the whole thing yet to avoid causing excess stress. Once all the links are loosened up and wiggle around freely it is quite flexible and the stresses distribute evenly among the links.

 

For AMS I encourage you to design your own patterns and do the coloring as you wish. Please post photos of your creations in the comments! :)

 

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