Bosch 1800 Consignes De Fonctionnement/Sécurité page 10

BM 1609929J64 12-05
ELECTRONIC FEEDBACK CIRCUITRY (EFC)
(Models 1803EVS & 1806E only)
The internal electronic feedback system
provides a "soft start", which will reduce the
stresses that occur from a high torque start.
The system also helps to keep the no load
speed virtually constant between no-load and
load conditions.
KICKBACK STOP
Your tool is equipped with a kickback stop
feature. This feature shuts of the tool
automatically if the tool stalls, or the wheel
encounters excessive force. To resume
operation, TURN ON/OFF SWITCH TO THE
OFF POSITION, THEN RESTART THE
TOOL.
RESTART PROTECTION
The restart protection feature was designed
to help prevent accidental startups after the
power has been interrupted. To resume
operation if this occurs, TURN ON/OFF
SWITCH TO THE OFF POSITION, THEN
RESTART THE TOOL.
OVERLOAD PROTECTION
(Models 1803EVS & 1806E only)
Your tool is equipped with overload
protection to protect the motor. If the tool
stops during operation TURN OFF SWITCH
IMMEDIATELY and allow the motor to cool
for about 30 seconds by running at no-load.
If the overload protection stops the tool
SELECTING GRINDING WHEELS
Before using a grinding
!
WARNING
wheel, be certain that its
maximum safe operating speed is not
exceeded by the nameplate speed of the
grinder. Do not exceed the recommended
wheel diameter.
DISC GRINDING WHEELS
Grinding wheels should be carefully selected
in order to use the grinder most efficiently.
Wheels vary in type of abrasive, bond,
hardness, grit size and structure. The correct
type of wheel to use is determined by the job.
Use disc grinding wheels for fast grinding of
structural steel, heavy weld beads, steel
casting, stainless steel and other ferrous
metals.
12/12/05 4:07 PM
Grinding Operations
Page 10
repeatedly, excessive force is causing the
tool to overload. Don't press so hard and let
the tool do the work.
VARIABLE SPEED WITH DIAL SETTING
(1803EVS ONLY)
Your tool is also equipped with a variable
speed dial. The grinder's RPM can be preset
from zero to maximum nameplate rated RPM
by rotating the dial on the motor housing. If
tool is running at a set speed for extended
periods of time, it may be necessary to run
the tool at no- load full speed to cool the motor.
Dial Setting Application
Approx. RPM Material
Polishing Plastic
1
(2800)
Precision grinding Grinding disc
of metal tools
2-3 Solid wood &
(5300-7500) paint removal
Brushing wood
3
(7500) Removing rust
from metal
4-6 Grinding metal
(8800-11000) or stone
Roughing metal
6
(11000) Cutting stone
GRINDING TIPS
Efficient grinding is achieved by controlling
the pressure and keeping the angle between
wheel and workpiece at 10° to 15°. If the
wheel is flat, the tool is difficult to control. If
the angle is too steep, the pressure is
concentrated on a small area causing
burning to the work surface.
Excessive or sudden pres-
!
WARNING
sure on the wheel will slow
grinding action and put dangerous stresses
on the wheel.
When grinding with a new wheel be certain
to grind while pulling tool backwards until
wheel becomes rounded on its edge. New
wheels have sharp corners which tend to
"bite" or cut into workpiece when pushing
forward.
-10-
Attachment
Lambswool bonnet
felt polishing disc,
or buffing disc.
Sanding disc
Cup brush
Sanding disc
Grinding disc
Roughing disc
Cutting disc