Chip And Dust Extraction Unit; Operation; Adjusting The Cutting Depth - Metabo BKH 450 Plus Original Operating Instructions

3
Note:
The humming noise after switch-off aris-
es due to the electronic motor brake re-
sponse. It is not a machine fault!
3. Check the saw blade's direction of
rotation from the left-hand side of
the saw. The saw blade must rota-
te clockwise.
If the saw blade rotates anti-clockwise:
Changing the direction of rotation:
4. Disconnect the mains cable from the
machine.
5. Using a screwdriver, press down the
phase changer in the connector on
the machine and rotate by 180°.
A
Caution!
Do not attempt to turn the phase
changer at the contact pins!
6.4 Chip and dust extraction
unit
A
Danger!
The machine produces wood dust
while working, so connect it to a
dust collector.
Dust of certain timber species (e.g.
beech, oak, ash) can cause cancer
when inhaled.
– Use a suitable dust extraction unit
when working in enclosed spaces.
– In addition, use a dust mask, as not
all saw dust is collected or extract-
ed.
– Operation without a suitable dust
collector is only allowed out of
doors.
The dust collector must fulfill the follow-
ing requirements:
– Matches the diameter of the dust
suction nozzle (see available acces-
sories chapter). Diameter 100 mm;
– Air flow volume 460 m
≥
– Underpressure at the saw's suction
nozzle 530 Pa;
≥
– Air speed at the saw's suction noz-
zle
≥
To connect the circular saw to a dust
collector, you will need a dust suction
nozzle (see available accessories chap-
ter).
Switch on the dust collector before be-
ginning sawing.
Observe the dust collector's operating
instructions as well!
7.

Operation

A
Risk of injury!
This saw may only be operated by
one person at a time. Other persons
shall stay only at a distance to the
saw for the purpose of feeding or re-
moving stock.
Before starting work, check to see
that the following are in proper
working order:
– mains cable and plug;
– ON/OFF switch;
– riving knife;
– blade guard; and
– feeding aids (push stick, handle for
push block).
Use personal protection equipment:
– dust mask;
– ear protection; and
– safety goggles.
Assume proper operating position:
– at the front of the saw on the opera-
tor side;
– in front of the saw;
– to the left of the line of cut; and
– if work is being carried out by two
persons, with the other person re-
maining at an adequate distance to
the saw.
If the type of work requires it, use
the following:
– suitable workpiece supports – if oth-
erwise workpiece would fall off the
table after being cut
– dust extraction device (accessory).
Avoid typical operator mistakes:
– Do not attempt to stop the saw blade
by pushing the workpiece against its
side. This poses a risk of kickback.
– Always hold the workpiece down on
the table and do not jam it. This pos-
3
/h;
es a risk of kickback.
– Never cut several workpieces at the
same time – and also never cut bun-
20 m/s.
ENGLISH
dles containing several individual
pieces. There is a risk of personal in-
jury if individual pieces are caught
by the saw blade in an uncontrolled
manner.
c
Drawing-in/trapping hazard!
Never cut workpieces to which
ropes, cords, bands, cables or wires
are attached or workpieces which
contain any of these materials.
A
Risk of injury!
Do not attempt to remove chips from
the saw table while the saw blade is
rotating. The saw blade must always
be stationary before such work can
be carried out.
3
Note:
During every cutting operation make
sure the blade guard is covering the
saw blade and the lower front edge of
the blade guard is touching the work-
piece.
7.1 Adjusting the cutting
depth
A
Danger!
Parts of the body or objects in the
adjustment area can be caught by
the running saw blade! Set the depth
of cut only with the saw blade at
standstill!
A
Danger!
No other personnel may be in the
danger zone during the height ad-
justment.
Always turn the lever with two
hands. This reduces the danger of
injuries and crushing!
The cutting depth of the saw blade must
be adapted to the height of the work-
piece: the saw blade height must equal
or exceed the height of the workpiece to
be cut. The blade guard must rest with
its front edge on the workpiece.

Adjusting the cutting depth

1. Turn the twist lever (49) all the way
to the left, hold and lift or lower the
saw blade.
9