Garden Knife Sheath

This replaces the transparent acrylic version that’s sure to resurface in the garden:

The ends have nice chamfered entrances made from octagons:

The thing went away so fast I didn’t get a chance to photograph it, but magenta PETG filament should make it much harder to mislay, out there among the greenery…

The OpenSCAD source code:

// Garden Knife Scabbard
// Ed Nisley KE4ZNU - August 2015

//- Extrusion parameters - must match reality!

ThreadThick = 0.25;
ThreadWidth = 0.40;

function IntegerMultiple(Size,Unit) = Unit * ceil(Size / Unit);

Protrusion = 0.1;

HoleWindage = 0.2;

//------
// Dimensions

WallThick = IntegerMultiple(3.0,ThreadWidth);

Blade = [115,1.8,16.0];

Clearance = [10.0,2.0,2.0];

Slot = Blade + Clearance;

Sheath = Slot + [0,2*WallThick,2*WallThick];

//- Build it


translate([0,0,Sheath[2]/2])
    difference() {
        union() {
            for (i=[-1,1])
                translate([i*Sheath[0]/2,0,-Sheath[2]/2])
                    rotate(180/32)
                        cylinder(d=Sheath[1],h=Sheath[2],$fn=32);
            cube(Sheath,center=true);
        }
        cube(Slot + [Slot[0],0,0],center=true);
        for (i=[-1,1])
            translate([i*(Sheath[0]/2 + Sheath[1]/2),0,-Slot[2]/2])
                rotate(180/8)
                    cylinder(d=Sheath[1] - 4*ThreadWidth,h=Slot[2],$fn=8);
    }