Bosch GHO 12V-20 Professional Notice Originale page 15

OBJ_BUCH-2967-001.book Page 15 Tuesday, June 6, 2017 10:34 AM
Removing the battery
To remove the battery 5, press the unlocking buttons 6 and
pull the battery out of the machine to the rear. Do not exert
any force.
Changing the Tool
The hex key 18 required for changing the planer blade is
housed inside the power tool and should always be stored
there (see figure F).
Observe the notes for disposal.
 Be cautious when replacing the planer blades. Do not
grasp the planer blades by the cutting edges. Possible
danger of injury due to the sharp cutting edges of the plan-
er blades.
Use only original Bosch carbide blades (TC).
The carbide blade (TC) has 2 cutting edges and can be re-
versed. When both cutting edges are dull, the planer blade 17
must be replaced. The carbide blade (TC) may not be resharp-
ened.
Disassembling the Planer Blade(s) (see figure A)
To turn or replace the planer blade 17, turn the blade head 19
until it is parallel to the adjustable planer base plate 14.
 Loosen the two fastening screws 21 with the Hex key 18
by approx. 1 – 2 turns.
 If necessary, loosen the clamping element 20 by giving it
a light blow with a suitable tool (e.g. a wooden wedge).
 Push the side cutter block guard 8 downwards and use a
piece of wood to push the planer blade 17 to the side and
out of the blade head 19.
Assembling the Planer Blade(s) (see figure B)
The guide groove of the planer blade always ensures continu-
ous height adjustment when replacing or reversing it.
If required, clean the blade seat in the clamping element 20
and the planer blade 17.
When fitting the planer blade, ensure that it is securely seated
in the mounting guide of the clamping element 20 and is
aligned flush with the side edge of the planer base plate 9.
Then tighten the two fixing screws 21 with the hex key 18.
Note: Before restarting, check if the fastening screws 21 are
tightened well. Rotate the blade drum 19 by hand and ensure
that the planer blade does not graze.
Note: A spare blade 17 can be placed in the drawer 7 (see fig-
ure E).
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.
Bosch Power Tools
– 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.
Clean the chip ejector 13 regularly. Switch off the power tool
to do so. Remove the chip ejector and tap it to clear the chips.
Use a suitable tool, e.g. a piece of wood, compressed air etc.
to clean a blocked chip ejector.
 Do not reach into the chip ejector with your hands. They
could be injured by rotating parts.
To ensure optimum extraction of dust/chips, always work
with external dust extraction or a chip/dust bag.
External Dust Extraction (see figures C, G and H)
Remove the chip ejector 13.
The dust extraction adapter 24 (accessory) with dust extrac-
tion hose (Ø 35 mm) 22 (accessory) can be fitted to either
side of the power tool.
Firstly insert the dust extraction adapter 24 into the power
tool. Engage the lock 25 on the dust extraction adapter. Then
insert the dust extraction hose 22 into the dust extraction
adapter 24 until you hear both snap fasteners 26 on the dust
extraction hose engage.
Connect the dust extraction hose 22 to a vacuum cleaner (ac-
cessory). You will find an overview of connecting to various
vacuum cleaners at the end of these operating instructions.
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.
Integrated Dust Extraction (see figures C and I)
Remove the chip ejector 13.
You can use a dust/chip bag (accessory) 23 for small-scale
tasks.
Insert the dust/chip bag 23 into the power tool. Engage the
locking device 25 on the dust/chip bag.
Empty the dust/chip bag 23 in time, so that dust continues to
be collected optimally.
Choice of Chip Ejector Side
Insert the chip ejector 13 into the right-hand or left-hand side
of the planer to determine the direction in which the chips are
ejected. If the chip ejector 13 is not inserted, dust and chips
are ejected on both sides of the planer.
Operation
Note: The power tool can be operated using all Bosch 10.8 V
and 12 V batteries. We recommended using batteries with a
capacity of at least 2.5 Ah for optimum power.
Operating Modes
Adjusting the Planing Depth
Note: The power tool is optimised for cutting depths of up to
1 mm.
English | 15
1 609 92A 24V | (6.6.17)