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Project developed by Hannah Stoll
- This hand powered machine is a food processing tool that will grind peanuts down so they can be made into peanut butter. There aren't many 3D printable milling devices out there. This entire mill is 3D printed and was designed with all open source technology. Food processing mills and machines are expensive to buy, so this printable one allows people in need to have tools that work.
Bill of Materials
- Fully 3D printable (I used 1.75mm PLA filament)
Tools needed for fabrication of the OSAT
- MOST Delta RepRap or similar RepRap 3-D printer
Skills and Knowledge Necessary to Make the OSAT
Technical Specifications and Assembly Instructions
Directions for Assembly:
- Fit center rod into internal grinder
- Place it in the outer grinder
- Put bearing top on the center rod
- Slide funnel on and snap pegs to outside of outer grinder
- Line up bearing top and bottom on funnel with center rod running through them
- Plastic join the bearing top and bottom
- Plastic join the internal grinder with the bracket
- Snap on connector arm to center rod
- Snap on handle to connector arm
- Include print time estimate
- Assembly time estimate: 15 minutes
- Drawing of Assembly:
Common Problems and Solutions
- Plastic welding: The point of doing this in two places was to eliminate the need for screws and washers to make this completely printable. It is difficult, but placing the nozzle in the holes given and extruding +40 gives a good weld.
- The pegs on the funnel just snap around the outer grinder. I had an issue with the original part, but this was the quick fix.
- If your solution is not a low cost one then it is not really appropriate.
- Estimate your costs
- Find a commercial equivalent
- Calculate $ savings and % savings
Benefited Internet Communities
- Name and add links to at least 5 using single brackets around [url name]
- The sources of information (e.g. engineering handbooks, journal articles, government documents, webpages, books, magazine articles etc.). References should use the <ref> </ref> and <references/> tags and can be in any format but should include all the information necessary for someone else to find the same information you did. For example: 
- web page: Department of Energy (DOE) Landscaping and Energy Efficiency, DOE/GO-10095 (1995) Available: http://www.eren.doe.gov/erec/factsheets/landscape.html
Based on the developmental needs addressed (e.g. food, heat, electricity, clean water, health care, etc.) be sure to label your device in the proper categories e.g. use [[Category:Water]]. Be sure to categorize your device so that it will be easy to find – for example “Low voltage connection basics” is categorized in [[Category:How tos]] [[Category:Electricity]] [[Category:Electric lighting]].