Philips Norelco One Blade Adjustable Comb Plate Replacement

A replacement comb plate for the Philips Norelco One Blade Pro Adjustable Comb since all of the teeth on the original snapped off over time

• Requires no modification of the rest of the assembly

• Installs in a few simple steps

• Optimized the original design for maximum strength when 3D printed

• Prints well with no supports (if you choose, read below)

Tools 

• Thin metal or plastic pry tool (I use a pair of tweezers)

Printing 

Print both components with their comb teeth flat on the bed as shown in the screenshot of the sliced file above. 

I like to use the Bambu Textured PEI Plate but if you prefer a smooth finish on the face a smooth plate works too

Use PLA at 30% rectilinear infill with 4 wall loops

PLA is the only material I've found to have strong enough layer adhesion for this part. When tested with PETG, PC and ABS the thin arms that are printed vertically shear along the layer lines after only a few uses. I've added as much material as I can to reinforce these areas but due to the way the blade sits into the comb there aren't many places material can be added. I've been using the PLA version for around 4.5 months now with no signs of weakening and no heat related issues when run under hot water for cleaning.

It will print successfully without the supports but the unsupported bottom edge will have a slight sag that is not visible once installed and does not affect its functionality. If you prefer to print it with supports I recommend using tree supports on the long bridge on the Comb Plate only, as shown in the build plate image.

Assembly

Remove the support material

Press fit the Tooth Array into its slot in the Comb Plate. You may add a drop of super glue if you like but it shouldn't be necessary,  it's a very tight press fit.

Slip a thin pry tool between the rotary dial and the original comb plate and pry upwards. The rotary dial should pop right off. Make sure to keep the dial and its trim piece held together so that the spring inside doesn't fall out of place

Slide the broken original comb plate out and insert the printed one in its place. 

Line the indicator on the rotary dial up with the 0.5mm marking at the top and press down on the center of the dial to lock it back into place. It should snap down with a solid click.

And you're done! Test the dial to make sure the comb fully extends and retracts!