Bosch GDB 350 WE Professional - Инструкция по эксплуатации - Страница 12

12

 | English 

1 609 92A 1A4 | (12.5.15)

Bosch Power Tools

Declaration of Conformity

We declare under our sole responsibility that the product de-
scribed under “Technical Data” is in conformity with all rele-
vant provisions of the directives 2011/65/EU, until 
19 April 2016: 2004/108/EC, from 20 April 2016 on: 
2014/30/EU, 2006/42/EC including their amendments and 
complies with the following standards: EN 61029-1, 
EN 61029-2-6.

Technical file (2006/42/EC) at:
Robert Bosch GmbH, PT/ETM9,
70764 Leinfelden-Echterdingen, GERMANY

Robert Bosch GmbH, Power Tools Division
70764 Leinfelden-Echterdingen, GERMANY
Leinfelden, 04.05.2015

Assembly



Before any work on the machine itself, pull the mains 

plug.

Mounting the Carrying Handle

Before first-time use, securely fit the carrying handle 

12

 to 

the power tool using the internal hex screws 

13

.

Clamping In Drill Stand for Diamond Drills 

GCR 350



The safety and operating instructions for the drill stand 

being used are to be strictly observed!

For mounting the power tool into the drill stand, please read 
and observe the operating instructions of the drill stand.

Inserting/Replacing the Core Bit



Before any work on the power tool, during work breaks 

and when not using the power tool, secure the power 

tool against unintentional movement by tightening the 

parking brake 5. 

To do so, read and follow the operating 

instructions of the drill stand.

Inserting a Core Bit



Examine the core bit before inserting it. Use only core 

bits that are in perfect condition. 

Damaged or deformed 

core bits can lead to dangerous situations.

Clean the core bit before inserting it. Apply a light coat of 
grease to the core bit thread or spray on a corrosion protec-
tion agent.

Screw a 1 1/4"-UNC core bit 

9

 onto the drill spindle 

10

.



Check the proper seating of the core bit. 

Incorrectly or 

unsecurely fastened core bits can become loose during op-
eration and may pose a danger.

Removing a Core Bit



Wear protective gloves when replacing the core bit. 

The core bit can become hot after prolonged operation of 
the power tool.

Loosen the core bit 

9

 using an open-end spanner (size 

41 mm). When doing so, hold a second open-end spanner 
(size 32 mm) on the two flats of the drill spindle 

10

 to provide 

counterforce.

The easy-release element 

11

 makes it easier to release the 

core bit 

9

.

Connecting the Water Cooling

When wet-drilling core bits are not sufficiently cooled during 
drilling, the diamond segments can become damaged or the 
core bit can become jammed in the bore hole. Therefore, pro-
vide for a sufficient water supply during wet drilling.

When boring out a given bore, the given bore must be careful-
ly plugged in order to enable sufficient cooling of the core bit.



Connected hoses, shut-off valves or accessories must 

not obstruct or hinder the drilling process. 

Shut the water cock 

8

. Connect water supply to the water-out-

let connector 

7

. The water supply is possible either via a mo-

bile water-pressure container (accessory) or via stationary 
water connection.

You require a water collection ring and a wet/dry vacuum 
cleaner (both accessories) to collect the water escaping from 
the bore hole during wet drilling.



When wet drilling overhead, the escaping water must 

be collected. 

To do this, insert the power tool into a drill 

stand and mount a water collecting ring.

Read and observe the operating instructions of the water col-
lection ring to mount it.

Operation

Starting Operation



Observe the mains voltage! 

The voltage of the power 

source must correspond with the data on the type plate of 
the machine.



Before beginning work, consult the structural engi-

neer, architect or construction supervisor in charge. 

Only cut through reinforcements with the permission 

of a structural engineer.



When core drilling through walls or floors, ensure to 

check the respective rooms/enclosures for obstruc-

tions. Barrier off the construction site and secure the 

drilled out core against falling down with the use of cas-

ing or similar.

Function test of the portable residual current device 

(PRCD)

Each time before beginning work, check that the portable re-
sidual current device (PRCD) 

2

 is functioning properly:

– Press the 

“TEST”

 button on the portable residual current 

device (PRCD). The red control indicator extinguishes.

– Press the 

“RESET”

 button. It must now be possible to 

switch the power tool on.

Henk Becker
Executive Vice President
Engineering

Helmut Heinzelmann
Head of Product Certification
PT/ETM9

OBJ_BUCH-2203-002.book  Page 12  Tuesday, May 12, 2015  9:22 AM