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mend that all tool service be performed at a
Bosch Factory Service Center.
Tool Lubrication
Your Bosch tool has been properly lubricated
and is ready for use. We recommend, that tools
with gears be regreased with a special gear
lubricant every time the brushes are changed.
Carbon Brushes
The brushes and commutator in your Bosch
tool have been engineered for many hours of
dependable service. To maintain peak effi-
ciency of the motor, we recommend that every
two to six months the brushes be examined.
Only genuine Bosch replacement brushes spe-
cially designed for your tool should be used.
Bearings
After about 300-400 hours of operation, or at
every second brush change, the bearings should
be replaced at a Bosch Factory Service Center.
Bearings which become noisy (due to heavy
load or very abrasive material cutting) should
be replaced at once to avoid overheating and
motor failure.
Cleaning
WARNING! To avoid accidents, always
disconnect the tool from the power supply
before cleaning or performing any maintenance.
The tool may be cleaned most effectively with
compressed air. Always wear safety goggles
when cleaning tools with compressed air.
Ventilation openings and switch levers must be
kept clean and free of foreign matter. Do not
attempt to clean by inserting pointed objects
through openings.
CAUTION! Certain cleaning agents and
solvents damage plastic parts. Some of these
are: gasoline, carbon tetrachloride, chlorinated
cleaning solvents, ammonia and household
detergents that contain ammonia.
Maintenance and Service
WARNING! Preventive maintenance per-
formed by unauthorized personnel may result
in misplacing of internal wires and components
which could cause serious hazard. We recom-
Slide the die holder 6 carefully over the punch
and into the housing 3. Re-tighten the winged
screw 2. The winged screw must engage one of
the holes in the die holder 6.
NOTE: The punch cannot be reground.
Replacing the Die
Unscrew the knurled nut 9 together with the
rubber ring 8 out of the die holder 6 and remove
the die 7. Remove any rust material or cutting
particles that may have collected in the die
holder 6.
Insert a new die 7 paying attention to the align-
ment of the flat surface on the side. Firmly
tighten the knurled nut 9 against the resistance
of the rubber ring 8.
NOTE: The die cannot be reground.
Punch and Die Lubrication
Proper lubrication is essential to prolong punch
and die life, and is achieved by occasionally
fully submersing the punch and die in a small
container of the proper lubricant.
To further ensure a smooth cut and long punch
life, always lubricate the cutting path with cut-
ting oil. When cutting steel or stainless steel,
lubricate path of cut before starting work. When
cutting aluminum, lubricate path of cut while
making the cut. Since the punch cuts on the
downstroke, the upper side of the cut should be
lubricated.
When cutting steel, use a cutting oil or an SAE
30 weight oil.
When cutting aluminum, a mixture of 7 parts
kerosene and 3 parts turpentine should be used.
Should punch jam, immediately switch off
nibbler, re-lubricate punch and die, and remove
tension from sheet.
WARNING! The use of any accessory or
attachment other than recommended in this
instruction manual or the BOSCH Catalog may
present a risk of personal injury.
BM 3609929430 4-04 4/22/04, 9:56 AM7