VERITAS Mk.II Honing, Руководство пользователя

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Step 6: Honing the Micro-Bevel
One of the features of the honing guide is that the blade can be quickly and easily
honed to a razor-sharp edge by adding a micro-bevel (or secondary bevel) to the
primary bevel. A smooth micro-bevel on the blade produces the same result as honing
the complete bevel, since only the cutting edge itself has any effect when cutting. You
remove less steel, but arrive at a sharp edge quickly. With the micro-bevel knob in the
6 o’clock position, you will obtain a micro-bevel with a 1° to 2° difference from the
primary bevel.
Back Bevels
Back bevels are low-angle bevels applied to the back of a plane blade. There are two
major reasons to apply a back bevel, and these depend on the type of plane blade.
On a bench plane (where the blade is
mounted bevel down), a back bevel is used to
increase the effective cutting angle from the
otherwise fi xed 45° of the plane bed. This
is useful when working wood with highly
fi gured and/or reversing grain. The back-
bevel angle will need to be tailored to the
particular situation; however, the following
chart may be used as a starting point:
On a low-angle plane (where the blade is mounted bevel up), a back bevel is used
to increase the included bevel angle without affecting the effective cutting angle.
The purpose of this is to increase the durability of the edge, particularly when
working end grain. For this application, very low back-bevel angles must be used
to maintain adequate relief angle behind the edge.
Figure 8: Micro-bevels. Figure 9: Micro-bevel knob set for
honing the micro-bevel.
Figure 10: Bevels on a plane blade.
Back-
Bevel
Angle
Effective
Cutting
Angle Application
10° 55° Difficult/reversing grain in softwoods (such as pine) and
slightly figured/reversing grain in more difficult hardwoods
(e.g., oak, ash and maple).
15° 60° For all but the most difficult woods. Usually required for
woods like oak with very severe grain fluctuation, crotch
figure as well as near knots and bark inclusions.
20° 65° To minimize tear-out on the most difficult woods.
Micro-Bevel
1° to 2°
Primary Bevel
Primary
Bevel Micro-Bevel
Back Bevel
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