9 Prong Espresso Distribution Tool WDT

This thing was crowd designed by the members of the Espresso Aficianados Discord. If this design or espresso interests you, hop in and say hello!

The Tool

A nine pronged WDT tool. This was designed for 0.4x75mm 0.35x75mm acupuncture needles with a 30mm handle. The total length of the needle is 105mm (see photo). I used https://www.aliexpress.com/item/1005001467649993.html. Others have used 3d printer needles from amazon 1 2.

Dull the tips of the needles on an emery board or sandpaper before installing. Store tip down in a cup of rice for safety and to clean the needles.

Printing

Print cap upside down (threads up)

Youtube features:

• Brian Quan
• Lance Hedrick
• Hoon's Coffee

• James Hoffmann

  Licensing

  A note to commercial printers: this WDT is meant to be affordable and accessible for espresso enthusiasts. I give permission to print and sell these as long as the following conditions are met. 0. Any posting should include a link to this design. 1. Prints should include needles. 2. Total cost may not exceed 9 USD. 3. If a stand is included, total cost should not exceed 10 USD. Total costs exclude shipping and handling.

  Edits

  Edit 7: Modified licensing terms to exclude shipping and handling cost.

  Edit 6: Added two piece WDT holder that breaks apart for easier shipping.

  Edit 5: Modified licensing terms to allow limited commercial printing.

  Edit 4: In terms of needle diameters, 0.25mm deforms too easily to WDT effectively. 0.3mm is nice if using bottom filters as it causes less disturbance. 0.35mm is nearly as robust as a 0.4mm needle, but moves the coffee less. 0.4mm is the sturdiest of them all but moves the coffee around the most. Any size between 0.3-0.4mm will work, but 0.35mm is a nice compromise.

  Edit3: Added a bottom with bigger holes (1.2mm rather than 1mm) for the needle for folks having trouble with the hole size.

  Edit2: By popular demand, i've added a WDT holder base. It comes in a 70mm octagonal base and a 58.5mm circular base (to fit various accessory holders).

  Edit: added a magnetic clip STL and updated the fusion file to include it. This uses 4 5x1mm magnets (https://www.amazon.com/gp/product/B07JDBLVBZ/ref=ppx\_yo\_dt\_b\_search\_asin\_title?ie=UTF8&psc=1), but 2 5x2mm magnets should fit as well.

  Print Settings

Printer Brand:

Prusa

Printer:

I3 MK3S

Rafts:

No

Supports:

No

Resolution:

0.15mm z height

Infill:

15

Filament: Hatchbox PLA Black and Silver
Notes:

Print with threads up