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Rock Hound VS Harley Rake
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<blockquote data-quote="TriHonu" data-source="post: 12925" data-attributes="member: 897"><p>The smooth surface of the drum is below ground level during normal operation. The teeth are designed to break off small layers of soil cutting from the bottom and lifting the soil upward. The teeth are designed to pulverize the soil, unlike a tiller that is designed to cut and mix soil. </p><p>As the drum rotates the teeth pulverize the soil. When the teeth strike something hard (like a stone) the object is pitched forward away from the drum. This causes the rake like action by continuing to flick the solid debris forward . When the teeth are in soil, the soil tends to absorb the force by yielding and pulverizing. The pulverized soil will be drawn over the top of the drum being re-deposited at the rear of the drum. The plastic plate sitting along the top of the drum is adjustable and the distance above the drum determines how small the clumps must be to return to the rear of the drum. The drum also helps act as a screed maintaining an even cut.</p><p>The drum must counter-rotate against the direction of travel. If you change direction and pull the attachment you have to reverse the rotation of the drum.</p><p>The travel speed determines how much soil is cut and carried forward. The faster the travel speed the more soil is carried between the end plates (like a box blade) or side-cast if the drum is angled and the side plates removed. The slower the travel the more time the soil has to be pulverized and redeposited at the rear of the drum.</p></blockquote><p></p>
[QUOTE="TriHonu, post: 12925, member: 897"] The smooth surface of the drum is below ground level during normal operation. The teeth are designed to break off small layers of soil cutting from the bottom and lifting the soil upward. The teeth are designed to pulverize the soil, unlike a tiller that is designed to cut and mix soil. As the drum rotates the teeth pulverize the soil. When the teeth strike something hard (like a stone) the object is pitched forward away from the drum. This causes the rake like action by continuing to flick the solid debris forward . When the teeth are in soil, the soil tends to absorb the force by yielding and pulverizing. The pulverized soil will be drawn over the top of the drum being re-deposited at the rear of the drum. The plastic plate sitting along the top of the drum is adjustable and the distance above the drum determines how small the clumps must be to return to the rear of the drum. The drum also helps act as a screed maintaining an even cut. The drum must counter-rotate against the direction of travel. If you change direction and pull the attachment you have to reverse the rotation of the drum. The travel speed determines how much soil is cut and carried forward. The faster the travel speed the more soil is carried between the end plates (like a box blade) or side-cast if the drum is angled and the side plates removed. The slower the travel the more time the soil has to be pulverized and redeposited at the rear of the drum. [/QUOTE]
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