Kitchen Blender Base Spacer

We don’t use the blender much, so the most recent bearing replacement continues to work. I never got around to re-making the overly long shaft spacer from the first bearing replacement, which I compensated for with a spacer kludge cut from a random chunk of bendy plastic sheet.

Which we put up with For. Eleven. Years.

The blender recently emerged from hiding and, with my solid modeling-fu cranked up to a dangerous chattering whine, I conjured a real spacer:

Blender base spacer - Slic3r preview
Blender base spacer – Slic3r preview

It pretty much disappears into the blender base, which is the whole point of the operation:

Blender base spacer - installed
Blender base spacer – installed

When the bearings fail again, I promise to make a proper shaft spacer and toss this bodge.

The OpenSCAD code as a GitHub Gist:

// Kitchen blender base adapter
// Ed Nisley KE4ZNU June 2019
//- Extrusion parameters must match reality!
/* [Hidden] */
ThreadThick = 0.25;
ThreadWidth = 0.40;
HoleWindage = 0.2;
Protrusion = 0.1; // make holes end cleanly
inch = 25.4;
function IntegerMultiple(Size,Unit) = Unit * ceil(Size / Unit);
ID = 0;
OD = 1;
LENGTH = 2;
//----------
// Just build it
Spacer = [48.0,66.0,1.8]; // LENGTH raises blade holder
Aligner = [Spacer[ID],52.0,Spacer[LENGTH] + 3.0]; // LENGTH locks into base ring
NumSides = 4*3*4;
//----------
// Just build it
difference() {
union() {
cylinder(d=Spacer[OD],h=IntegerMultiple(Spacer[LENGTH],ThreadThick),$fn=NumSides);
cylinder(d=Aligner[OD],h=Aligner[LENGTH],$fn=NumSides);
}
translate([0,0,-Protrusion])
cylinder(d=Spacer[ID],h=10*Aligner[LENGTH],$fn=NumSides);
}

Not that it really deserves so much attention …