FA info icon.svg Angle down icon.svg Project data
Authors John Medley
Status Designed
Made No
Replicated No
Cost USD 21.22
OKH Manifest Download

Winnowing is a process to remove lighter particles of chaff, dirt, etc from grain and other products typically by throwing it into the air and blowing air on it.

Bill of Materials[edit | edit source]

  • 1 x Winnower Adapter
  • 2 x 2-Liter Bottles
  • 1 x Fan like device (hair dryer is what I used to test it)

Tools needed[edit | edit source]

  1. MOST Delta RepRap or similar RepRap 3-D printer
  2. Something to attach the fan if needed.

Skills and knowledge needed[edit | edit source]

  • 3D Printing Knowledge & Capabilities
  • Understand the needs & application for the most efficient customization

Technical Specifications and Assembly Instructions[edit | edit source]

  1. Print adapter.
    • It is recommended to print around 30 mm/s with a 20% infill
    • Print using supports and it is recommended to print with one of the thread sides on the print bed.
  2. Break off supports.
    • There is a probably a small support under the bottom threads, make sure to break that off.
  3. Attach fan by whatever means necessary.
  4. Fill a 2-Liter bottle with desired grain to winnow
  5. Attach 2-liter bottles
  6. Turn on fan and simply turn the unit so the grain falls down through the passage of air which should blow the dirt and debris off of your grain.
  7. Repeat process until grain is clean.

Cost savings[edit | edit source]

  • 42g of PLA ($1.22 USD) + Recycled 2-Liters + Fan ($+-20 USD) $+-21.22 USD Total
  • Compared to $1,350.00 USD This is the only winnower like device i could find in a easy google search.
  • Cost savings = $1,338.78 USD, That's some hefty saving.
  • This project is still can use some work but nothing like this exists. If it can be proven to work well, it could be a very cheap way to ease the process of food processing!

Benefited Internet Communities[edit | edit source]

Name and add links to at least 5 using single brackets around [url name]:

FA info icon.svg Angle down icon.svg Page data
Keywords 3d printing, winnower, metal, plastic
SDG SDG09 Industry innovation and infrastructure, SDG11 Sustainable cities and communities, SDG12 Responsible consumption and production
Authors John Medley
License CC-BY-SA-3.0
Organizations MTU, Michigan_Tech's_Open_Sustainability_Technology_Lab
Language English (en)
Related 0 subpages, 5 pages link here
Aliases 2 Liter Winnower
Impact 800 page views
Created December 7, 2018 by John Medley
Modified January 29, 2024 by Felipe Schenone
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