THIS IS THE FIRST VERSION OF THIS UTILITY KNIFE, CHECK THIS LINK FOR A NEW VERSION!

https://makerworld.com/en/models/21889#profileId-19934

Edit

I'll put a list of the updates I make for this design here. I received some comments and I want to improve this model.

• 21.12.22 - Made a larger opening to fit the blade ( from 0.8mm to 0.9mm ), the first pair of holes for the screw are now larger to fit better the screws ( from Ø 1.6mm to Ø 1.8 mm ). The second pair of holes are the same size so you can tighten the screw.
   

Intro

I never was into utility knives! Not even sure why! Probably because of the blade size or big and chunky handles. But a couple of days ago I used one ( without a handle, only blade ) and it gave me the sensation of precise and clean execution of the task I was doing at that moment.

Design

From there… without losing a second I modeled a little simple blade holder. It was love on the first try! I did a few iterations and came to the final result where I use two little screws to fix the blade inside the holder because having something made in 3d printed plastic wasn't very safe to hold this kind of tool in my opinion.  

One of the main ideas was to use 3d printed layers in the right orientation where the blade isn't going to break/separate the layers apart. 

Another important point was to have a cover to protect my and others' hands from unwanted cuts! And it is a snap-fit so you will not lose it during transportation.

Print Settings

One utility knife holder with its cover prints in only 27 minutes if you use Prusa's 0.35 LH printing settings.

It is faster on BambuLabs Printers 

No need for support and brim on this print!

In my opinion, the 0.35 LH print setup is perfect because you'll have a little more grip on the blade with higher layers, avoiding it in this way any kind of hand slipping.

Additional material

You will need two little screws.
I'm using Large Head M2 x 5mm screws with a head diameter of Ø4.5mm

And obviously a standard utility blade :D

Assembly

All the assembly is pretty straightforward. Use the image I uploaded which illustrates step by step how to put everything together.

If you want more details you also can watch the video I also upload here. 

Attention

I would strongly suggest using this tool with caution! And remember to throw away your used blades by wrapping them in a piece of paper and writing on it “CAUTION BLADES” let's take care of workers' health!

For any questions feel free to contact me in DM's or comment on the print page! I'll be happy to answer all your questions and make some modifications if you want!