Starting Operation; Working Advice - Bosch GKS Professional 18V-57 G Manual Original

OBJ_BUCH-2769-003.book Page 20 Wednesday, June 8, 2016 9:35 AM
20 | English
Cutting Mark (GKS 18V-57):
45 0
The 0° cutting mark 11 indicates the position of the saw blade
for right-angled cuts. The 45° cutting mark 10 indicates the
position of the saw blade for 45° cuts.
For precise cuts, position the circular saw against the work-
piece as shown in the figure. It is best to carry out a trial cut.
GKS 18V-57 G:
When using the FSN guide rail system, the power tool can stay
in the guide rail's holder during a mitre cut.
Use only cutting mark 10 when
10
making a right-angled cut and a
45° cut with the guide rail.

Starting Operation

Inserting the battery
 Use only original Bosch lithium-ion batteries with the
voltage listed on the nameplate of your power tool.
Using other batteries can lead to injuries and pose a fire
hazard.
Insert the charged battery 19 from the front into the base of
the power tool. Push the battery completely into the base un-
til the red stripe can no longer be seen and the battery is se-
curely locked.
Switching On and Off
To start the machine, first push the lock-off button for the
On/Off switch 1 and then press the On/Off switch 18 and
keep it pressed.
To switch off the machine, release the On/Off switch 18.
Note: For safety reasons, the On/Off switch 18 cannot be
locked; it must remain pressed during the entire operation.
To save energy, only switch the power tool on when using it.
Run-on Brake
An integrated run-on brake reduces the run-on period of the
saw blade after switching off the machine.
Protection Against Deep Discharging
The lithium-ion battery is protected against deep discharging
by the "Electronic Cell Protection (ECP)". When the battery is
empty, the machine is switched off by means of a protective
circuit: The inserted tool no longer rotates.
1 609 92A 36W | (8.6.16)

Working Advice

The width of cut varies depending on the saw blade used.
Protect saw blades against impact and shock.
Guide the machine evenly and with light feed in the cutting di-
45 0
rection. Excessive feed significantly reduces the service life of
the saw blade and can cause damage to the power tool.
Sawing performance and cutting quality depend essentially
on the condition and the tooth form of the saw blade. There-
fore, use only sharp saw blades that are suited for the material
to be worked.
Sawing Wood
The correct selection of the saw blade depends on the type
and quality of the wood and whether lengthway or crossway
cuts are required.
When cutting spruce lengthways, long spiral chips are
formed.
Beech and oak dusts are especially detrimental to health.
Therefore, work only with dust extraction.
Sawing with Parallel Guide (see figure D)
The parallel guide 12 enables exact cuts along a workpiece
edge and cutting strips of the same dimension.
Sawing with Auxiliary Guide (see figure E)
For sawing large workpieces or straight edges, a board or
strip can be clamped to the workpiece as an auxiliary guide;
the base plate of the circular saw can be guided alongside the
auxiliary guide.
Sawing with Guide Rail (see figure G)
The guide rail 34 is used to carry out straight cuts.
Note: Use the guide rail 34 only for right-angled cuts. When
using for mitre cuts, the guide rail 34 can become damaged.
The adhesive coating prevents the guide rail from slipping and
protects the surface of the workpiece. The coating of the
guide rail allows the circular saw to glide easily.
Place the circular saw directly onto the guide rail 34. Fasten
the guide rail 34 with suitable clamping devices, e. g., screw
clamps, on the workpiece in such a manner that the narrow
leg of the guide rail 34 faces toward the saw blade.
The guide rail 34 must not extend beyond the face side of
the workpiece where the cut is to be started.
Switch the machine on and guide it in the cutting direction ap-
plying moderate and steady feed.
Two guide rails can be connected using the connection piece
36. Clamping is carried out with the four screws located in the
connection piece.
Recommendations for Optimal Handling of the Battery
Protect the battery against moisture and water.
Store the battery only within a temperature range between
–20 °C and 50 °C. As an example, do not leave the battery in
the car in summer.
Occasionally clean the venting slots of the battery using a soft,
clean and dry brush.
A significantly reduced working period after charging indi-
cates that the battery is used and must be replaced.
Observe the notes for disposal.
Bosch Power Tools