Braun handeld mixer to normal beater adapter

Overview

This design adapts 'normal' mixer beaters to the Braun-style drive adapters for their newer handheld mixers.  (I tested this on a Braun MultiMix 5) You can attach old beaters to these adapters and use them in the new mixer.  I printed out a bunch of these to see which ones fit the old beaters the best since they were all different.  The original beaters did all seem to have 6mm diameter shafts, but I am not sure how standard it actually is overall.

Print Settings

I used ABS, though it will probably work with PETG/nylon/ASA.  PLA might be a bit brittle, but no one is stopping you from trying!  Here are my slicer settings:

• layer height=0.2mm

• nozzle=0.4 mm

• solid perimeters=5

• top/bottom layers=5

• 30% gyroid infill

• no supports needed

Part Optimization

I have these optimized for my printer, so you may need to tweak the design.  I recommend the development snapshot of OpenSCAD with manifold enabled since otherwise it takes forever to render.   If the inlet slots are too large or small (currently set to 1.5mm) increase or decrease nubwd to fit your needs.  Several other variables may need to be adjusted, the basic parameters are shown below:

origshaft=6; //diameter of beater shaft plus required slop
nubdia=8; //outer diameter of nub
nubwd=1.5; //'thickness' of nub piece <--- **** most likely one you will need to change ****
nubout=1.5; //protrusion of nub from shaft

Everything should be snug, but obviously no so snug that the old beater doesn't fit!  It may take some trial-and-error if your existing beaters are different than the ones I had laying around.  It can be easier to visualize the changes if you set cutout=1 (90 degree cut) or cutout=0.5 (180 degree cut).  I recommend making a number of different changes and printing a batch to see what works best.

You can change the make[[circ,hex],[circ,hex],...] array to generate multiple permutations.  The circ and hex values are for the friction fit landing on the twist latch for the circular and hexagonal pieces respectively.  I found that once I had origshaft, nubdia, nubwd and nubout set so all the existing beaters fit, I just needed to play around with the frictionh values to make a secure fit for each type.  

You can also call the function directly to make either a hexagonal or circular part:  beaterblank(type="hex",frictionh=1.5) where type is either "hex" or "circ" and frictionh is the friction fit landing height.