Manual Bosch GKT 55 GCE Professional (page 18 of 228) (English, German, Dutch, Danish, French, Italian, Polish, Portuguese, Swedish, Turkish, Spanish, Norwegian, Finnish)

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18 | English

1 609 92A 14W | (21.1.15) Bosch Power Tools

Actuating lock-off button 2 releases the plunging device at the

same time, and allows for the saw to be pushed down. This

makes the saw blade plunge into the workpiece. When pulling

up, the saw retracts to the starting position and the plunging

device is locked again.

To switch off the machine, release the On/Off switch 1.

Note: For safety reasons, the On/Off switch 1 cannot be

locked; it must remain pressed during the entire operation.

To save energy, only switch the power tool on when using it.

Reduced starting current

The electronic reduced starting current limits the power con-

sumption when switching the tool on and enables operation

from a 13 ampere fuse.

Constant Electronic Control

Constant electronic control holds the speed constant at no-

load and under load, and ensures uniform working perfor-

mance.

Speed preselection

The required speed can be preselected with the thumbwheel

24 (also while running).

The required speed depends on the saw blade being used and

on the material being worked (see overview of saw blades at

the end of these operating instructions).

Working Advice

Protect saw blades against impact and shock.

Guide the machine evenly and with light feed in the cutting di-

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.

 Before any work on the machine itself, pull the mains

plug.

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 Plastic

Note: When sawing plastic, especially PVC, long spiral-

shaped shavings develop, which can be electrostatically

charged. These can clog the sawdust ejector 18. It is recom-

mended to work with dust extraction.

Guide the switched on power tool against the workpiece and

carefully start the cut. Continue the cut with low feed and

without interruption, so that the saw teeth do not gum up too

quickly.

Sawing Non-ferrous Metals

Note: Use only a sharp saw blade that is suitable for non-fer-

rous metals. This ensures a clean cut and prevents blade bind-

ing.

Guide the switched on power tool against the workpiece and

carefully start the cut. Continue the cut with low feed and

without interruption.

When sawing profiles, always begin the cut from the narrow

side; when sawing U-profiles, never start the cut from the

open side. Support long profiles in order to avoid blade bind-

ing and kickback of the power tool.

Sawing Light Building Materials (Materials with Mineral

Content)

 When sawing light building materials, observe the stat-

utory provisions and the recommendations of the ma-

terial suppliers.

Light building materials may only be sawn dry and when ap-

plying dust extraction. Always work with the guide rail 29 (ac-

cessory).

The vacuum cleaner must be approved for the extraction of

masonry dust. Bosch provides suitable vacuum cleaners.

Sawing with Guide Rail (see figure D)

The guide rail 29 is used to carry out straight cuts.

The rubber lip on the guide rail acts as a splinter guard; it pre-

vents fraying of the surface while sawing wooden materials.

For this, the teeth of the saw blade must face directly against

the rubber lip.

Prior to the very first cut, the rubber lip must be adapted with

the guide rail 29 to the circular saw being used. For this, place

the guide rail 29 over its complete length on a workpiece. Ad-

just a cutting depth of approx. 9 mm and the saw blade to a ze-

ro degree angle. Switch the circular saw on and guide it uni-

formly and with light feed in the cutting direction.

Two guide rails can be connected using the connection piece

30. Clamping is carried out with the four screws located in the

connection piece.

Adapting the Base Plate to other Guide Rails

(see figure E)

The small groove integrated in base plate 7 can be used for

the guide rails shown on the accessories page. To adapt the

base plate to guide rails of other manufacturers with a wider

guide fin, remove plastic insert 34. Place the saw onto the

guide rail and adjust its accurate fit with the two knurled

screws 35, if required.

Sawing with Parallel Guide (see figure F–G)

The parallel guide 14 enables exact cuts along a workpiece

edge and cutting strips of the same dimension.

Slide the guide rods of parallel guide

14 through the guides in

base plate 7. Mount the wing bolts 10 on both sides as shown

in the figure, but do not tighten the wing bolts 10 yet.

Adjust the desired cutting width as the scale value at the re-

spective cutting mark 32 or 33, see section “Cutting Marks”.

Tighten the wing bolts 10.

OBJ_BUCH-1471-002.book Page 18 Wednesday, January 21, 2015 1:35 PM

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Bosch GKT 55 GCE Professional Manual

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