Harvey MW TECH TZLI30M Mode D'emploi page 53

M1.1.TZLI30M-TZLI30MRT.NLFREN - 12022019
EN
The guard encloses the top of the blade to reduce the risk of accidental blade
contact and contain flying chips or dust. The guard is designed to lift as the
workpiece is pushed into the blade, remain in contact with the workpiece
during the cut, then return to a resting position against the table when the cut
is complete.
Blade guard refers to the assembly that consists of the guard, spreader, and
anti-kickback pawls (see figure 21).
WARNING!
To ensure that the guard does its job effectively, it must
be installed and adjusted so that it moves up and down
properly to accommodate workpieces and maintain
coverage over the blade.
Spreader or riving knife
The spreader is a metal plate that prevents the freshly cut pieces of the
workpiece from pinching the backside of the blade and causing a kickback. It
also acts as a barrier behind the blade to shield hands from being pulled into
the blade if a kick-back occurs. Place a straightedge against the blade and
the spreader. When properly aligned, the spreader/riving knife will be in the
"alignment zone," shown in figure 22, and will be parallel with the blade.
The riving knife works the same way as the spreader on the blade guard
assembly. It is a metal plate that prevents the newly cut workpiece from
pinching the backside of the blade and causing kickback. The key difference
between the spreader and the riving knife is that the riving knife mounts below
the blade's highest point of rotation, as shown in figure 23.
The height difference between the riving knife and the blade allows the
workpiece to pass over the blade during non-through cuts (those in which
the blade does not cut all the way through the thickness of the workpiece).
The riving knife acts as a barrier behind the blade to reduce the risk of hands
being pulled into the blade if a kickback occurs. The riving knife must be kept
within the range shown in figure 24. For that reason, we only recommend
using a 10" blade for operations that require use of the riving knife.
WARNING!
To ensure that the riving knife works safely, it must be
aligned with and correctly adjusted to the blade.
Clear shield
Figure 21 - Blade guard assembly
components
Spreader or
riving knife
Figure 22 - Spreader/riving knife alignment
zone
Minimum 1 mm
Maximum 5 mm
Figure 23 - Height difference between riving
knife and blade
Top distance
Minimum 3 mm
Maximum 8 mm
Figure 24 - Allowable top and bottom
distances between riving knife and blade
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Spreader
Anti-kickback
pawl
Alignment
zone
Blade
Height difference
Bottom distance
Minimum 3 mm
Maximum 8 mm