The reliable Original Prusa MK4S is now available in discounted bundles with the MMU3 and Enclosure. Grab yours today!

OTF Fidget Knife - only 3 Parts

3D Printed OTF Fidget Knife: Easy Assembly, Endless Fun
4,793
28 k
513
85 k
updated May 21, 2024

Makes

Comments

Prints fast and super nice - printed the "negative hook for better catch - guided" model in PETG, 0,15 layer - 0,4 nozzle.
Had to shorten the trigger on the bottom of the slider a bit, so more tension is build up before releasing the blade. The initial print had not enough force to fully slide the blade out.
Thanks for sharing that model - it's super fun :) (edited)

Guess that with this filament stronger springs are advised

Very cool design. Springs and latches work great. Printed in Jessie PETG Glitter Black. Fun to play with!

The slider with normal spring (grey model) didn't work, and the slider with even stronger spring (blue model) worked quite well for the 1st two weeks, then no more :/ It was good fun until then

Worked okay in pla for a while but the slider broke so now it only goes down.

OTF fidget knife

Printed nice
The strong spring prints well but is harder to use the switch and most of the time breaks the small pleases (the blade catcher and the blade releaser)
Printed well
Works well with the normal spring now breaking
Doesn’t retract all the ways and I have to press it down
Looks cool
Works pretty well
Fun to play with all peaces print in 1hr 40mins total

really fun to mess with