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Seed Drill Punch

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MOST Delta filament as guide.JPG This page was part of an MTU course MSE4777 OA and MSE4777 OB/MSE5777/EE4777/EE5777: Open-source 3-D printing

Please leave comments using the discussion tab. The course runs in the Fall semester. It is not open edit.

3D Printed Seed Drill Punch for Hard Soil[edit]

Project developed by --Jmbrooki (talk) 07:05, 2 December 2014 (PST)
This OSAT has been designed but not yet tested - use at own risk.
This OSAT has been prototyped.

You can help Appropedia by contributing to the next step in this OSAT's status.


  1. In the most basic form, a seed drill is a device that will position seeds in soil, without waste. This idea was an improvement over sowing seeds, where soil was tilled and seeds were thrown over the dirt. Before a mechanical device was invented, the solution was to individually plant seeds, by hand.[1]
  2. My proposed improvement is to create a seed reservoir, which will resemble a funnel, with the drill punch going through the center. This design will allow seed to be distributed into individual holes, regardless of soil compaction. While this design may not permit the fast movement of the powered-tiller designs[2], it will allow an individual the ability to seed a field regardless of soil composition.

Bill of Materials[edit]

  1. Printed Parts
    1. One (1) Seed Reservoir
    2. One (1) Spring Support and Drill Guide
    3. One (1) Lid
  2. PVC Pipe
  3. Rope, Cord, Twine, etc.
  4. Spring

Tools needed for fabrication of the OSAT[edit]

  1. MOST Delta RepRap or similar RepRap 3-D printer
  2. PVC Pipe for Low-Cost Handle
  3. Epoxy for Gluing Handle
  4. Spring
  5. Twine, Cord, Rope, etc.

SCAD Files and Thingiverse Link[edit]

Technical Specifications and Assembly Instructions[edit]

  • Total Printing Time was around ~25 hours. However, this was with extremely slow printing speeds.
  • Given a faster printer, this will easily be a one-day build project.

Assembly Instructions[edit]

  1. Ensure that all printed pieces fit together. Place the spring guide into the seed reservoir, then guide the drill bit through both holes, exposing the tip of the drill through the reservoir.
  2. Glue your handle to the center of the seed drill plunger.
  3. Assemble all the parts, and lace the tie downs with twine.

Common Problems and Solutions[edit]

  • A problem I ran into was that I scaled all parts to 2000%. Unfortunately, the seed drill plunger came out to large, and the corresponding holes needed to be filed down. I would recommend scaling the plunger less than the reservoir and guide.

Cost savings[edit]

  • Commercial Equivalent: $39,000+
  • Small Household Equivalent: $99.95[3]
  • OSAT Seed Drill: $13.50 - $18.50
  1. Printed Parts: $10-15
  2. PVC Pipe, 1.5in x 4ft: $2.50
  3. Spring: $1

  • Total Cost Savings from Commercial Equivalent, assuming you print 10 Seed Drills: $39,000 - $185.00 = $38,815