Dust/Chip Extraction; Starting Operation; Working Advice - Bosch PMF 250 CES Manual Original

OBJ_BUCH-2653-002.book Page 20 Friday, April 1, 2016 12:32 PM
20 | English

Dust/Chip Extraction

 Dust 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 dust can cause
allergic reactions and/or lead to respiratory infections of
the user or bystanders.
Certain dust, such as oak or beech dust, is considered car-
cinogenic, especially in connection with wood-treatment
additives (chromate, wood preservative). Materials con-
taining asbestos may only be worked by specialists.
– As far as possible, use a dust extraction system suitable
for the material.
– 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
materials to be worked.
 Prevent dust accumulation at the workplace. Dust can
easily ignite.
Connecting the Dust Extraction (see figure C)
The dust extraction 15 is intended only when working with the
sanding plate 8; it is not of use in combination with other ap-
plication tools.
For sanding, always connect the dust extraction.
To mount the dust extraction 15 (accessory), remove the
application tool and the depth stop 10.
Slide the dust extraction 15 all the way over the tool holder 6
onto the collar of the power tool. Turn the dust extraction to
the required position (not directly under the power tool).
Press shut the clamping lever 16 to fix the dust extraction.
Plug the tool sleeve of the vacuum hose 13 onto the vacuum
connection 14. Connect the vacuum hose 13 to a vacuum
cleaner (accessory).
An overview for connecting to various vacuum cleaners can be
found on the graphics page.
The vacuum cleaner must be suitable for the material being
worked.
When vacuuming dry dust that is especially detrimental to
health or carcinogenic, use a special vacuum cleaner.
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.
Switching On and Off
To start the machine, push the On/Off switch 2 forward so
that the "I" is indicated on the switch.
The electronic soft starting feature limits the torque upon
switching on and increases the working life of the motor.
The constant electronic control keeps the stroke rate almost
constant under no-load or load conditions and ensures a uni-
form working performance.
To switch off the machine, push the On/Off switch 2 toward
the rear so that the "0" is indicated on the switch.
To save energy, only switch the power tool on when using it.
1 609 92A 2T0 | (1.4.16)
Preselecting the Orbital Stroke Rate
With the thumbwheel for preselection of the orbital stroke
rate 3, you can preselect the required orbital stroke rate, even
during operation.
The required stroke rate depends on the material and the
working conditions and can be determined through practical
testing.
When sawing, cutting and sanding harder materials, e.g.,
wood or metal, it is recommended to work with orbital stroke
rate "6"; for softer materials, such as plastic, orbital stroke
rate "4" is recommended.

Working Advice

 Wait until the machine has come to a standstill before
placing it down.
 Before any work on the machine itself, pull the mains
plug.
Note: Do not cover off the venting slots 4 of the machine while
working, as this reduces the working life of the machine.
While working with HCS tools make sure that the covering of
the tools is undamaged.
Operating Principle
Due to the oscillating drive the application tool/accessory
oscillates up to 20000 times per minute at 2.8°. This allows
for precise work in narrow spaces.
Work with low and uniform application
pressure, otherwise, the working perfor-
mance will decline and the application tool
can become blocked.
While working, move the machine back and
forth, so that the application tool does not
heat up excessively and become blocked.
Sawing
 Use only undamaged saw blades that are in perfect con-
dition. Bent or dull saw blades can break, negatively influ-
ence the cut, or lead to kickback.
 When sawing light building materials, observe the stat-
utory provisions and the recommendations of the ma-
terial suppliers.
 Plunge cuts may only be applied to soft materials, such
as wood, gypsum plaster boards, etc.!
Before sawing with HCS saw blades in wood, particle board,
building materials, etc., check these for foreign objects such
as nails, screws, or similar. If required, remove foreign ob-
jects or use BIM saw blades.
Separating
Note: When separating wall tiles take into consideration that
the application tools/accessories wear heavily when used for
longer periods of time.
Bosch Power Tools