V-Shears & Clearing Blades
The principle of a V-Shear is the same as that of a bread-knife. If you present a sharpened, serrated blade edge to the smooth surface of a tree-stump, at a shallow angle, a little force can provide considerable cutting effect, even on very tough material such as seasoned eucalyptus stumps.
We have found that a V-shaped blade, equipped with sharpened serrations along its entire length and with the the full weight of a heavy dozer behind it, will progressively bite into the timber until it eventually shears it off at ground level and sweeps it to the side. The extended stinger at the front can be used to split large trees or stumps, to weaken them sufficiently to allow them to be cut right through. The angled kick plate at the blade and apron wall union appears to magnify the cutting effect, in much the same way as a wedge is used to open up a saw cut to fell a tree. This allows the use of lighter machines to carry out an effective shearing job.
In areas of heavy slash, the V-Shear is also used to sweep the debris to either side, to allow the unobstructed passage of a following plow. In areas of lighter slash and narrow row spacings of old stumps, it is possible to create 'traffic lanes' for following mid-rotation treatments. If you cut all the stumps off the left hand side of the shear on the way down a run, turning around and cutting the next row coming back again on the left side, you will throw two rows of debris together between the newly plowed beds. If you repeat this procedure on the next two rows, you create a 'traffic-lane' between the two pairs of mounded beds.