When using the tool, please keep the guide mounted on
the workpiece edge.
DEPTH OF CUT (Fig. 9)
As previously mentioned, the depth of cut is important
because it affects the rate of feed which, in turn, affects
the quality of a cut (and also, the possibility of damage to
your trimmer motor and cutter). A deep cut requires a
slower feed than a shallow cut and a too deep cut will
cause you to slow the feed so much that the cutter is no
longer cutting.
Making a deep cut is never advisable. The smaller cutters
especially those only 1.6 mm in diameter are easily
broken when subjected to too much side thrust. A
large cutter may not break, but if the cut is too deep
a rough cut will result and it may be very difficult
to guide and control the cutter as desired. For these
reasons, we recommend that you do not exceed 3 mm
depth of cut in a single pass, regardless of the cutter size
or the softness or condition of the workpiece. This will
result in a higher quality cut.
To make deeper cuts it is therefore necessary to make as
many successive passes as required, lowering the cutter
3 mm for each new pass. In order to save time, do all the
cutting necessary at one depth setting, before lowering
the cutter for the next pass. This will also ensure a
uniform depth when the final pass is completed.
Fig. 7
Fig. 8
OPERATION
cutter strike a knot, hard grain, foreign object etc, that
would affect the normal progress of the cutting action,
there will be a slight kickback — sufficient to spoil the
trueness of your cut if you are not prepared. Such a
kickback is always in the direction opposite to the
direction of cutter rotation.
To guard against such kickback, plan your setup and
direction of feed so that you will always be thrusting the
tool to hold it against whatever you are using to guide the
cut in the same direction that the leading edge of the
cutter is moving. In short, the thrust should be in a
direction that keeps the sharp edges of the cutter
continuously biting straight into new (uncut) timber.
WARNING:
If desired depth of cut is greater than can be
safely cut in one pass, make cuts in two or
more passes.
Trimmer Feed
Direction
Bit
Rotation
T
rimmer Feed
Direction
T
rim End
Grains First
Trimmer Feed
Direction
Fig. 10
Bolt A
Bolt B
Bolt C
Bit
Workpiece
Guide
Page 6
DIRECTION OF FEED AND THRUST (Fig. 10)
The trimmer motor and cutter revolve in a clockwise
direction. This gives the tool a slight tendency to twist (in
your hands) in a counterclockwise direction, especially
when the motor starts.
Because of the extremely high speed of cutter rotation
during “proper feeding” operation, there is very little
kickback under normal conditions. However, should the
Fig. 9
Width
of Cut
2ND.
Pass
1ST.
Pass
1ST.Pass
2ND.Pass
Depth
of Cut
