Bosch Professional GKT 18V-52 GC Original Instructions Manual page 27

Guide the power tool evenly, pushing it gently in the cutting
direction. Applying too much pressure to the power tool
when moving it in the cutting direction significantly reduces
the service life of the application tools and can damage the
power tool.
The sawing performance and the quality of the cut essen-
tially depend on the condition and the tooth shape of the
saw blade. This is why you should only use sharp saw blades
that are suitable for the material being machined.
Sawing wood
Choosing the right saw blade depends on the wood type,
wood quality and whether cuts with or against the grain are
required.
Making cuts in spruce with the grain produces long, spiral-
shaped chips.
Beech and oak dust is especially detrimental to health.
Therefore, work only with dust extraction.
Sawing Plastic
Note: Sawing plastic, in particular PVC, produces long,
spiral-shaped chips that can be electrostatically charged.
This can lead to the chip ejector (18) becoming clogged.
Therefore, you should not work without dust extraction.
Switch on the power tool and bring it into contact with the
workpiece, sawing it carefully. Then continue working
quickly and without interruption so that the saw teeth do not
become stuck as quickly.
Sawing lightweight materials (materials containing
minerals)
When sawing lightweight materials, take into account
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the statutory provisions and recommendations of the
material manufacturers.
Lightweight materials may only be worked on using dry cuts
and with a dust extraction system. Always use the guide rail
(30) (accessory).
The dust extractor must be approved for extracting stone
dust. Suitable dust extractors are available from Bosch.
Sawing with the guide rail (see figure B)
You can use the guide rail (30) to produce straight cuts.
The rubber lip on the guide rail acts as an anti-splinter guard,
which prevents the surface from splintering when sawing
wooden materials. To fulfil this function, the saw blade must
be positioned with its teeth right up against the rubber lip.
Before making the first cut with the guide rail (30), the rub-
ber lip must be adapted to the circular saw used. To do so,
position the guide rail (30) along the entire length of a work-
piece. Set a cutting depth of approx. 9 mm and a right-
angled mitre/bevel angle. Switch on the circular saw and
guide it evenly, pushing it gently in the cutting direction.
The connector (31) can be used to join two guide rails. The
four screws in the connector are used for the purpose of
clamping.
Fitting the guide rail to the base plate (see figure E)
The narrow groove (50) integrated into the base plate (8)
can be used for the guide rails shown on the accessories
Bosch Power Tools
page. Attach the saw to the guide rail and adjust the fitting
accuracy of saw and guide rail as required using the two
sliders (45).
To adjust the base plate to guide rails with a wider guide ring
that are made by other suppliers, remove the plastic insert
(44).
Sawing with the parallel guide (see figures F–G)
The parallel guide (46) allows you to make precise cuts
along the edge of a workpiece and cut strips with the same
dimensions.
Slide the guide rods on the parallel guide (46) through the
guides in the base plate (8). Attach the wing bolts (47) on
both sides as shown in the figure, then screw in the wing
bolts(47) without fully tightening them.
Set the required cutting width as the scale value at the re-
spective cut mark (33) or (32) (see "Cut marks (see figure
B)", page 24). Then tighten the wing bolts (47).
Sawing with an auxiliary guide (see figure H)
For working on large workpieces or for cutting straight
edges, you can securely fasten a board or rail to the work-
piece as an auxiliary guide. The circular saw can be guided
along the path of this auxiliary guide with the base plate.
Recommendations for Optimal Handling of the Battery
Protect the battery against moisture and water.
Only store the battery within a temperature range of −20 to
50 °C. Do not leave the battery in your car in the summer, for
example.
Occasionally clean the ventilation slots on the battery using a
soft brush that is clean and dry.
A significantly reduced operating time after charging indic-
ates that the battery has deteriorated and must be replaced.
Follow the instructions on correct disposal.
Maintenance and Service
Maintenance and cleaning
To ensure safe and efficient operation, always keep
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the power tool and the ventilation slots clean.
The protective guard (15) must always be able to move
freely and retract automatically. It is therefore important to
keep the area around the protective guard (15) clean at all
times. Remove dust and chips with a paintbrush.
Keep the dust/chip bag, chip ejector, base plate, guide rail
and groove for the guide rail clean at all times.
Non-coated saw blades can be protected against corrosion
using a thin layer of acid-free oil. Remove the oil again before
sawing as failure to do so will stain the wood.
Resin or glue residue on the saw blade has a detrimental ef-
fect on the quality of the cut. You should therefore clean saw
blades straight after use.
After-Sales Service and Application Service
Our after-sales service responds to your questions concern-
ing maintenance and repair of your product as well as spare
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