Bosch GBM 1600 RE Original Instructions Manual page 8

OBJ_BUCH-2233-004.book Page 8 Monday, August 22, 2016 3:47 PM
8 | English
To mount the key type drill chuck 1 turn the nut on the drive
spindle in clockwise direction to the stop. Place the key type
drill chuck without force onto the drive spindle until it is tightly
seated. Apply light blows with a rubber hammer onto the face
side of the key type drill chuck 1 to ensure tight seating of the
chuck. Pay attention that the clamping jaws of the key type
drill chuck do not project, in order not to damage them.
Mounting the securing screw
Screw the securing screw 10 anticlockwise into the open key
chuck. Always use a new securing screw, as their thread is ap-
plied with a securing adhesive substance, which is rendered
ineffective after several uses.
Dust/Chip Extraction
 Dusts from materials such as lead-containing coatings,
some wood types, minerals and metal can be harmful to
one's health. Touching or breathing-in the dusts can cause
allergic reactions and/or lead to respiratory infections of
the user or bystanders.
Certain dusts, such as oak or beech dust, are considered
as carcinogenic, especially in connection with wood-treat-
ment additives (chromate, wood preservative). Materials
containing asbestos may only be worked by specialists.
– Provide for good ventilation of the working place.
– It is recommended to wear a P2 filter-class respirator.
Observe the relevant regulations in your country for the mate-
rials to be worked.
 Prevent dust accumulation at the workplace. Dusts can
easily ignite.
Operation
Starting Operation
 Observe correct mains voltage! The voltage of the pow-
er source must agree with the voltage specified on the
nameplate of the machine. Power tools marked with
230 V can also be operated with 220 V.
Reversing the rotational direction (see figure D)
The rotational direction switch 7 is used to reverse the rota-
tional direction of the machine. However, this is not possible
with the On/Off switch 6 actuated.
Right rotation: For drilling and mixing, push the rotational di-
rection switch 7 to the left until it stops.
Left rotation: For loosening or mixing, push the rotational di-
rection switch 7 to the right until it stops.
Switching On and Off
To start the machine, press the On/Off switch 6 and keep it
pressed.
To lock the pressed On/Off switch 6, press the lock-on button
5.
To switch off the machine, release the On/Off switch 6 or
when it is locked with the lock-on button 5, briefly press the
On/Off switch 6 and then release it.
1 609 92A 1VD | (22.8.16)
Adjusting the Speed
The speed of the switched-on power tool can be variably ad-
justed, depending on how far the On/Off switch 6 is pressed.
Light pressure on the On/Off switch 6 results in a low rotation-
al speed. Further pressure on the switch results in an increase
in speed.
Work Instructions for Drilling
Use drilling lubricant or cutting oil for cooling and lubrication,
and to avoid overheating or jamming of the drill bit.
When drilling diameters >10 mm, drill a pilot hole with a small
drilling diameter. This allows you to reduce the feed pressure
and the power tool is strained less.
For drilling in metal, use only perfectly sharpened HSS drill
bits (HSS=high-speed steel). The appropriate quality is guar-
anteed by the Bosch accessories program.
The machine vice, which is available as an accessory, enables
secure clamping of workpieces. This prevents the workpiece
from turning and any accidents this would cause.
Work Instructions for Mixing
 Do not use the power tool in a stand.
 Avoid splashing around the material being stirred. Oth-
erwise, you could slip and lose control over the power tool.
 Avoid continuous operation of the power tool at re-
duced speed. Otherwise the motor of the power tool could
overheat.
To release the lock-on button 5, briefly press the on/off
switch 6 and then let it go. This will prevent the power tool
from restarting unintentionally (risk of injury).
Selection of the stirrer paddle is dependent on the material
that is to be stirred.
For materials with low viscosity, e. g. emulsion paint, varnish-
es, adhesive, grouting compound, cement slurry, use a stirrer
paddle with a left-hand spiral. The material is moved from the
top downwards in a stirrer paddle with a left-hand spiral. The
stirrer paddle is pushed upwards. Materials with low viscosity
are mixed in a way which minimises splattering.
For materials with high viscosity, e. g. plaster, concrete, ce-
ment, screed, filler, epoxy resin, use a stirrer paddle with
right-hand spiral. The material is moved from the bottom up-
wards in a stirrer paddle with a right-hand spiral. The stirrer
paddle works its way into the mixture. Materials with high vis-
cosity are mixed thoroughly.
While mixing, move the power tool in an up and down motion.
Clean the stirror paddle after use.
 Store the power tool in a safe place. Ensure that it can-
not fall over. Otherwise, the machine may become dam-
aged.
Maintenance and Service
Maintenance and Cleaning
 Before any work on the machine itself, pull the mains
plug.
Bosch Power Tools