Loosely inspired by the Amick Rollaerator and other youtube builds. Two large break rotors with articulating home made tines from 1/2” black pipe and a wheel hub / bearing.
The idea with articulating tines is that I can go a bit deeper than the standard 2” without the tines ripping the grass and making oblong holes. Also I expect that the tines are less likely to bend or break when hitting something hard.
The springs make sure that the tines hit the ground at the right angle. Shrink tube on the spacers reduce noise and wear from the tines slamming in to them.
by wriky
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https://preview.redd.it/y05iiv6ndlpe1.jpeg?width=3024&format=pjpg&auto=webp&s=2c09b14f92bed2217733f1824b5cfbb74ec05f59
Rigged up a ghetto wood handle for a quick “Alpha” test. Works pretty well but the tines hit the ground at about a 30 degree angle and preventing full penetration so only getting about 4-5cm (2ish)” instead of the full 8cm (just above 3”). The low angle also forces the pluggs in between the discs messing with the ejection. So need to move the spacers a bit for a more aggressive angle.