Bosch GKT 55 GCE - Инструкция по эксплуатации - Страница 18

18

 | English 

1 609 929 Y20 | (13.7.11)

Bosch Power Tools

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.

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 perform-

ance.

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.

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)

f

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 to one with use of the con-

nection 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

.

Sawing with Auxiliary Guide (see figure H)

For sawing large workpieces or straight edges, a board or 

strip can clamped to the workpiece as an auxiliary guide; the 

base plate of the circular saw can be guided alongside the aux-

iliary guide.

OBJ_BUCH-1471-001.book  Page 18  Wednesday, July 13, 2011  10:56 AM