Agriculture Reference
In-Depth Information
Diamond
file
Istor
blade
Figure 3.10
The best sharpeners are shaped to allow easy
access to all parts of the blade.
Shavings
from an
Istor blade
Filings from a
diamond file
Figure 3.11
Files with embedded industrial diamonds are
very effective, and produce fine filings (left). The Istor
blade at the other end of this tool works like a carpenter's
plane. It is used to rapidly reshape the edge of a worn and
blunt blade (right).
Figure 3.13
The perfect angle to sharpen the blade is 23°.
Hold the sharpener at a 90° (right angle) to the blade (top)
and then tilt it to half of this angle, that is, 45° (middle).
Finally, halve this angle again and you reach the optimum
23°
angle for sharpening (bottom).
Figure 3.12
A good secure grasp in preparation for
sharpening.
