Grinding Wheel Shape
4-7
WM doc 1/20/21
4
that wears quickest. As the radius increases during sharpening, it starts to grind into the
tooth face and leaves little or no hook angle in the tooth. (See Fig. 4-7.)
Maintain the shape of the wheel. If the radius becomes too large, redress the grinding
wheel:
1.
Redress the bottom angle.
2.
If necessary, redress the left radius and the back angle.
3.
Blend the left radius and right back angle with the bottom angle.
WARNING!
NEVER dress the wear area of the grinding wheel by
using the dressing stone on the side surface of the wheel. Doing so
could cause the wheel to explode, resulting in personal injury and/or
machine damage.
NOTE:
As the wheel becomes smaller in diameter, it has less surface area to grind with
and will wear down more quickly. Check the wheel regularly and redress as necessary.
IMPORTANT:
When sharpening a blade, particles can become lodged in the grinding
wheel that can burn or groove the gullet of the blade. Burns or grooves in the gullet create
microscopic stress fractures which will eventually cause the blade to break prematurely.
Lightly dress the wheel to remove lodged particles and prevent the wheel from burning or
grooving the blade.
FIG. 4-7
