How to sharpen a conventional cut-off tool so that it becomes versatile and how it works.
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It is shown how, when turning the turning of an M8 bolt, with one specially sharpened cut-off tool, he made 5 operations: stalked, turned on top, made a groove, removed a lead-in chamfer and cut off.
It is shown how I make a part like a coil from duralumin: with a cut-off cutter I cut in, and I sharpen both left and right.
It is shown how such a cutter works when sharpening steel.
Of course, if we use such, one might say - a weakened cutter, then care must be taken when turning left and right. When machining, especially steel, shavings should be removed of small width and thickness.
But in the same way, you can sharpen cutters with carbide inserts in order to work at higher conditions.
The work of such a cutter is shown.
Explains in detail how I sharpen the cut-off tool.
Shown on wood layout.
I do the rear angles on the side surfaces not according to GOST - 1 °, but more, about 5-8 degrees.
With such a cutter it is possible to carry out such operations that are usually performed by through-flowing thrust left and right cutters.
At large clearance angles on the lateral surfaces, the cutter can cut well with its lateral cutting edges both to the left and to the right.
With the help of angle grinders, I roughly carved cutting tools from a single piece of a quick cutter.
I provide large angles in two ways.
According to the first method, using a drill and a small abrasive wheel, I grind the side surfaces so that they become saddle-shaped. That is, the incisor is thinner in the middle part, and thicker at the top and bottom.
The saddle shape not only allows cutting with side cutting edges, but is also useful in terms of strength.
It is shown how I sharpen a cutter with a drill.
In the second method, I sharpen with a large circle only the very tips of the cutter, grinding off the lateral surfaces on both sides at large angles - 5-7 °.
Shown how I sharpen the cutter with a large circle.
The main thing in both methods is to provide large clearance angles. And not necessarily over the entire incisor height.
If a lot of work needs to be done with such a weakened cutter, then to ensure a positive rake angle, I grind a groove along the front surface. Now both the left and right front angles are positive.
Of course, such a specially sharpened cut-off cutter performs worse than the through cutters that it replaces. It can be applied as needed when the job is small.
I have been sharpening all my cutting tools like this for a long time.
Of course, a simple cut-off tool, without special sharpening, can work like that. But with large clearance angles, turning is easier, smoother.
This is how you can sharpen the cut-off tool so that it becomes universal, multifunctional.