This is a toy gravity knife I designed. It is fully 3D-printed and requires no hardware or glue to make. If you enjoy the design a like or make would be appreciated.

Check out my new print in place fidget bracelet here.

You can find my other toy knife designs here.

You can obtain a commercial license to sell prints of this here.

Print Settings

Resolution:

0.1 mm

Infill:

100%

Notes:

The only part that may need support is the handle. If you have problems with adhesion and overhangs I would suggest printing the "with supports" versions of the STL files.

This image shows the correct orientation to print each part.

Assembly Instructions

• The following videos show how to assemble the knife.
• When assembling the knife it is important to note the orientation of the flexing slider. Its sides are slanted so it only works in a specific orientation which can be seen best in the animation.
• I would strongly suggest using a lubricant on the flexing slider. It will work without lubricant but its action is much smoother when lubricated.
• The threading on the screw is (M8x1.25) and the threading on the knob is (M5x0.8).

Assembly animation

https://youtu.be/2Q7qPigd1_w?feature=shared

Uncut assembly video

https://youtu.be/PxNsLNK7w1I?feature=shared