Bosch GBH 3-28 DFR (061124A000) - Инструкция по эксплуатации - Страница 16

16

 | English 

1 619 92A 06A | (2.10.13)

Bosch Power Tools

Assembly



Before any work on the machine itself, pull the mains 
plug.

Auxiliary Handle



Operate your machine only with the auxiliary handle 12.

Changing the position of the auxiliary handle 
(see figure A)

The auxiliary handle 

12

 can be set to any position for a secure 

and low-fatigue working posture.

– Turn the bottom part of the auxiliary handle 

12

 in counter-

clockwise direction and swivel the auxiliary handle 

12

 to 

the desired position. Then retighten the bottom part of the 
auxiliary handle 

12

 by turning in clockwise direction.

Pay attention that the clamping band of the auxiliary handle is 
positioned in the groove on the housing as intended for.

Adjusting the Drilling Depth (see figure B)

The required drilling depth 

X

 can be set with the depth stop 

11

.

– Press the button for the depth stop adjustment 

10

 and in-

sert the depth stop into the auxiliary handle 

12

.

The knurled surface of the depth stop 

11

 must face down-

ward.

– Insert the SDS-plus drilling tool to the stop into the SDS-

plus tool holder 

3

. Otherwise, the movability of the SDS-

plus drilling tool can lead to incorrect adjustment of the 
drilling depth.

– Pull out the depth stop until the distance between the tip of 

the drill bit and the tip of the depth stop correspond with 
the desired drilling depth 

X

.

Selecting Drill Chucks and Tools

For hammer drilling and chiselling, SDS-plus tools are re-
quired that are inserted in the SDS-plus drill chuck.

For drilling without impact in wood, metal, ceramic and plas-
tic as well as for screwdriving, tools without SDS-plus are 
used (e. g., drills with cylindrical shank). For these tools, a 
keyless chuck or a key type drill chuck are required.

GBH 3-28 DFR: The SDS-plus quick change chuck 

2

 can easi-

ly be replaced against the quick change keyless chuck 

1

 pro-

vided.

Changing the Key Type Drill Chuck 
(GBH 3-28 DRE)

To work with tools without SDS-plus (e. g., drills with cylindri-
cal shank), a suitable drill chuck must be mounted (key type 
drill chuck or keyless chuck, accessories).

Mounting the Key Type Drill Chuck (see figure C)

– Screw the SDS-plus adapter shank 

17

 into a key type drill 

chuck 

16

. Secure the key type drill chuck 

16

 with the se-

curing screw 

15

. 

Please observe that the securing 

screw has a left-hand thread.

Inserting the Key Type Drill Chuck (see figure C)

– Clean the shank end of the adapter shank and apply a light 

coat of grease.

– Insert the key type drill chuck with the adapter shank into 

the tool holder with a turning motion until it automatically 
locks.

– Check the locking effect by pulling the key type drill chuck.

Removing the Key Type Drill Chuck

– Push the locking sleeve 

5

 toward the rear and pull out the 

key type drill chuck 

16

.

Removing/Inserting the Quick Change Chuck 
(GBH 3-28 DFR)

Removing the Quick Change Chuck (see figure D)

– Pull the lock ring for the quick change chuck 

6

 toward the 

rear, hold it in this position and pull off the SDS-plus quick 
change chuck 

2

 or the quick change keyless chuck 

1

 to-

ward the front.

After removing, protect the replacement chuck against con-
tamination.

Inserting the Quick Change Chuck (see figure E)



Use only model-specific original equipment and pay at-
tention to the number of identification grooves 19.On-
ly quick-change chucks with two or three identification 
grooves are permitted. 

When an unsuitable quick-change 

chuck is used, the application tool could fall out during op-
eration.

– Before inserting, clean the quick change chuck and apply a 

light coat of grease to the shank end.

– Grasp the SDS-plus quick change chuck 

2

 or the quick 

change keyless chuck 

1

 completely with your hand. Slide 

the quick change chuck with a turning motion onto the drill 
chuck mounting 

18

 until a distinct latching noise is heard.

– The quick change chuck is automatically locked. Check the 

locking effect by pulling the quick change chuck.

Operating Mode

Material

Concrete

Ø   4 – 28  mm

SDS-plus

SDS-plus

–

Brickwork

Ø  40 – 82 

mm

SDS-plus

SDS-plus

–

Steel

–

–

Ø  – 13 mm

SDS-plus

Wood

–

–

Ø  – 30 mm

SDS-plus

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