Mikleš M. author text journal article 2012 It is usually a technical problem to find mathematical ideal shape of knives of delimbing head. Determination of their shape in the form of general curve could lead to the technically unfeasible dimensions of the head. Criterion of the optimal shape of cutting contour of head is tightness of encirclement of cross section of trunk by knives. Research attention was aimed at conics. Parabola is the most suitable curve for achieving the best quality of delimbing. delimber; forest machine; delimbing tool 10.17221/51/2011-RAE https://rae.agriculturejournals.cz/artkey/rae-201204-0003.php https://rae.agriculturejournals.cz/artkey/rae-201204-0003.php continuing 58 4 131 135 2012 12129151 periodical academic journal