Seed Fractionator or Zigzag Seed Cleaner

Tool Concept
Ready to Build


A seed fractionator operates by subjecting seed to a tortuous air stream of finely adjustable speed. The seed sample is separated into light seed and heavy seed. The fractionation can be done several times to subdivide a sample into more parts. Germination tests performed on each sample allow the seed seller to certify the germination rate. This seed fractionator is powered by an electric shop vacuum, which supplies a steady flow of air. These plans were developed by Ben of the RealSeeds company in England,
Documentation Wiki: 

These plans are available thanks to the RealSeeds company of Pembrokeshire, England. The link to the plans on their website is:

If you need to convert from metric to SAE, here is a link to a good calculator:


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