Stihl MSE 210 C-BQ Instruction Manual - Page 20
Open-face Technique, Making Sapwood Cuts, D =Felling Cut, WARNING - 40 cm
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English Open-face Technique Making Sapwood Cuts D =Felling Cut D D 001BA150 KN 001BA144 KN Felling notch (C) - determines the direction of the fall For an open-face cut: N Properly place felling notch perpendicular to the line of fall, close to the ground. N Cut down at approx. 50° angle to a depth of approx.1/5 to 1/4 of the trunk diameter. N Make second cut from below at approx. 40 degree angle. N Remove resulting 90° piece. N For medium sized or larger trees make cuts at both sides of the trunk, at same height as subsequent felling cut. N Cut to no more than width of guide bar. This is especially important in softwood in summer - it helps prevent sapwood splintering when the tree falls. Conventional and open-face technique: N Begin 1 to 2 inches (2,5 to 5 cm) higher than center of felling notch. N Cut horizontally towards the felling notch. N Leave approx.1/10 of diameter uncut. This is the hinge. N Do not cut through the hinge - you could lose control of the direction of the fall. Drive wedges into the felling cut where necessary to control the fall. WARNING If the tip of the bar contacts a wedge, it may cause kickback. Wedges should be of wood or plastic - never steel, which can damage the chain. 18 MSE 170 C, MSE 210 C