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Dust/Chip Extraction; Operating Modes; Starting Operation - Bosch GHO 40-82 C Professional Original Instructions Manual

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14 | English
Before any work on the machine itself, pull the mains
Changing the Tool
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 16
must be replaced. The carbide blade (TC) may not be resharp-
Disassembling the Planer Blade(s) (see figure A)
To reverse or replace the planer blade 16, rotate the blade
drum 13 until it is parallel to the planer base plate 10.
Loosen the two fastening screws 15 with the Allen key
18 by approx. 1 – 2 turns.
If necessary, loosen the clamping element 14 by giving it
a light blow with a suitable tool (e.g. a wooden wedge).
Fold the lateral blade-shaft protector 17 down and push
the carbide blade 16 sideward out of the blade drum 13
using a piece of wood.
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 14
and the planer blade 16.
When assembling the planer blade, ensure that it is seated
properly in the blade holder of the clamping element 14 and
aligned flush at the side edge of the rear planer base plate 10.
Afterwards tighten the 2 fastening screws 15 again with the
Allen key 18.
Note: Before restarting, check if the fastening screws 15 are
tightened well. Rotate the blade drum 13 by hand and ensure
that the planer blade does not graze.

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.
– As far as possible, use a dust extraction system suita-
ble 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.
1 619 929 J65 | (12.10.11)
Clean the chip ejector 2 regularly. Use a suitable tool (e.g., a
piece of wood, compressed air, etc.) to clean a clogged chip
Do not reach into the saw dust 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 figure C)
An extraction hose (Ø 35 mm) 19 (accessory), can be at-
tached on either side of the chip ejector.
Connect the vacuum hose 19 to a vacuum cleaner (accesso-
ry). An overview for connecting to various vacuum cleaners
can be found at the end of this manual.
The vacuum cleaner must be suitable for the material being
When vacuuming dry dust that is especially detrimental to
health or carcinogenic, use a special vacuum cleaner.
Integrated Dust Extraction (see figure C)
A chip/dust bag (accessory) 20 can be used for smaller jobs.
Insert the sleeve of the chip/dust bag firmly into the chip ejec-
tor 2. Empty the chip/dust bag 20 at regulary intervals to
maintain optimum dust collection.
Choice of Chip Ejector Side
With the selector lever 9, the chip ejector 2 can be switched
to right or left. Always press the selector lever 9 until it engag-
es in the end position. The selected ejection direction is indi-
cated by an arrow symbol on the selector lever 9.

Operating Modes

Adjusting the Planing Depth
With the adjustment knob 1, the planing depth can be adjust-
ed variably from 0–4.0 mm using the planing depth scale 4
(scale graduation = 0.1 mm).
Park Rest (see figure G)
The park rest 28 allows the machine to be set down directly
after operation, without danger of damaging the working sur-
face or the planer blade. While planing, the park rest 28 is tilt-
ed upwards thus enabling full contact of the rear part of the
planer base plate 10.

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.
Switching On and Off
To start the machine, first push the lock-off button for the
On/Off switch 5 and then press the On/Off switch 6 and keep
it pressed.
To switch off the machine, release the On/Off switch 6.
Note: For safety reasons, the On/Off switch 6 cannot be
locked; it must remain pressed during the entire operation.
Bosch Power Tools