Jump to content

utility knife handle


dbotos

Recommended Posts

Posted · utility knife handle

I need to work on my print quality, but just wanted to share something functional I designed and printed. It's a two-piece handle for a utility knife blade. I modeled one half, mirrored it, and then enlarged the holes in the second half and added countersinks to those holes (the holes are sized for 4-40 screw tap and clearance). In hindsight, I should have made the halves unequal thickness and just put the recess for the blade in one half. I guess I will have to try version 2 tomorrow. I did test this one on a cardboard box and it cut nicely (especially since it has a brand new blade). After printing, I had to drill out the holes larger, tap the holes in the one side, and touch up the countersinks, but all in all, I'm pretty happy since I have just gotten my printer running this week. :D

  • Link to post
    Share on other sites

    Posted · utility knife handle

    Here's version 2.0. I printed much slower (50 mm/s) and used 100% fill density. I had to snug the extruder pinch knob a couple times to get it feeding consistently. Print temperature was 220*C.

    The holes in the halves didn't quite line up perfectly, so they're shifted slightly when screwed together (I think I will just model holes in one half and then drill through into the other half after printing). I also accidentally peeled a few strands from the perimeter while sanding it with some 400 grit sandpaper. The blade recess needs to be a smidge larger too. I think I will also increase the wall thickness setting.

  • Link to post
    Share on other sites

    Posted · utility knife handle

    Thanks. I will definitely post some form of it up there. I'm up to version 5 now...

    I did one last version of the two-piece before I decided to try a one-piece (with the part being built on edge instead of on its side). The first one-piece didn't turn out so great cause it wasn't very stable (only 1/4" wide) and it partially broke loose from the platform as it was printing the upper portion. I solved that problem by adding some removable stabilizers underneath it for version 5. Version 5 was supposed to have the little nub on the underside too, but the first layer of the nub didn't adhere well to the platform (since it was basically a single line) and it got hosed from there (I might change it to being a "bite" shape out of the perimeter instead). Also came up with a cap that makes it look like a jumbo USB key or a cigar cutter (also a one-piece). Still need to work on tuning some parameters to get better print quality, but I've just been having too much fun messing around with different designs. :D

    If anyone wants to make some knives until I get something uploaded to Thingiverse, you really only need the blade recess dimensions and then the rest of the handle can be built around that:

    -recess thickness = 0.025" (blade measured 0.023")

    -recess height = 0.770" (was .750" in drawing above)

    -distance from breakout at top to rear blade hole = .775"

    -distance between blade holes (center to center) = .260"

    -distance from rear blade hole center to closest corner = .520" (was .500" in drawing above)

    -distance from top edge of recess to blade hole centers = .100" (was .063" in drawing above)

    I used 4-40 screws, but M3s should work as well since they are just a tiny bit larger.

  • Link to post
    Share on other sites

    Posted · utility knife handle

    fantastic.

    really nice practical and quick use of the ultimaker.

    we need to see more people doing this kind of thing.

    building a ultimaker workshop,.... tool by tool.

    Ian :D

  • Link to post
    Share on other sites

    Posted · utility knife handle

    that creations of yours are so impressive.

  • Link to post
    Share on other sites

    Posted · utility knife handle

    yeahh!!! IAN were the same ideas it is a easy and quick to use the ultimaker knife-handle

  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now
    • Our picks

      • Introducing the UltiMaker Factor 4
        We are happy to announce the next evolution in the UltiMaker 3D printer lineup: the UltiMaker Factor 4 industrial-grade 3D printer, designed to take manufacturing to new levels of efficiency and reliability. Factor 4 is an end-to-end 3D printing solution for light industrial applications
          • Thanks
          • Like
        • 3 replies
      • UltiMaker Cura 5.7 stable released
        Cura 5.7 is here and it brings a handy new workflow improvement when using Thingiverse and Cura together, as well as additional capabilities for Method series printers, and a powerful way of sharing print settings using new printer-agnostic project files! Read on to find out about all of these improvements and more. 
         
          • Like
        • 26 replies
    ×
    ×
    • Create New...