Bosch Professional GHO 185-LI Instructions Manual page 12

12 | English
moved for transport and storage. There is risk of injury
from unintentionally pressing the on/off switch.
Choosing the Planer Blade
The power tool can be fitted with different planer blades.
Fitting the adapter (37) (accessory) allows the power tool to
be changed from HSS planer blades (18) to HM/TC planer
blades (23).
Always change both planer blades – replacing just one blade
will create an imbalance that could cause vibrations and
shorten the service life of the power tool.
Changing the HSS Planer Blades
Take care when changing the planer blade. Do not pick
u
up the planer blade by the cutting edges. You may be
injured by the sharp cutting edges.
Removing the Planer Blades (see figures A–C)
– To replace the planer blades, turn the blade head (16)
until the clamping jaw (15) is parallel with the planer base
plate (11).
– Unscrew the three fastening screws (14) with the T-
handle socket spanner (13) and remove the clamping
jaw (15).
– Push the retaining clip (19) together with the planer
blade (18) out of the blade head (16) and/or the guide
groove (17).
– Turn the blade head 180° and remove the second planer
blade.
Note: Before changing or resharpening the planer blades,
remove the retaining clip (19) by undoing the fastening
screw (20).
Resharpening HSS Planer Blades (see figure D)
Worn or blunt HSS planer blades can be resharpened using
the sharpening aid (21) (accessory) and a commercially
available grinding stone.
Place both planer blades in the sharpening aid and clamp
them firmly with the wing bolt. Make sure that both planer
blades are pushed in fully.
Move the planer blades placed in the sharpening aid steadily
across the grinding stone, applying light pressure.
Note: The planer blades must not be resharpened by more
than 6 mm (i.e. to a minimum width of 23 mm). Both planer
blades must be replaced when they reach this size.
Fitting the Planer Blades (see figures E–F)
Before (re)inserting new or resharpened planer blades,
clean the blade head (16) and, if necessary, the planer
blade (18) and the retaining clip (19). Clean heavily
gummed planer blades with spirits or petroleum.
Note: New and resharpened planer blades must always be
set to the correct height before fitting.
The setting gauge (22) (accessory) is used to adjust the
height of the planer blades. Place the planer blade (18) and
the retaining clip (19) on the setting gauge. Make sure that
the blade retainer (19) engages in the groove intended for
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this purpose. Press the planer blade (18) against the guide
and fix the retaining clip (19) in this position with the fasten-
ing screw (20). This will automatically adjust the correct
height.
The planer blade must be fitted and aligned with the centre
of the planer base plate (11). Then tighten the three
fastening screws (14) with the T-handle socket
spanner (13). Ensure that the tightening sequence
(①②③) on the clamping jaw (15) is followed correctly.
Note: Check that the fastening screws (14) are firmly
tightened before start-up. Turn the blade head (16) by hand
and ensure that the planer blades are not brushing against
anything.
Changing the HM/TC Planer Blades
Take care when changing the planer blade. Do not pick
u
up the planer blade by the cutting edges. You may be
injured by the sharp cutting edges.
Use only original Bosch HM/TC planer blades.
Hard metal (HM/TC) planer blades have two cutting edges
and can be turned. If both cutting edges become blunt, the
planer blades (23) need to be changed. HM/TC planer
blades must not be resharpened.
Removing the Planer Blades (see figures G–H)
– To turn or replace the planer blades, turn the blade head
(16) until the clamping jaw (15) is parallel with the planer
base plate (11).
– Undo the three fastening screws (14) using the Torx key
(13) (approx. 1–2 turns). The clamping jaw (15) does
not need to be removed.
– Turn the blade head slightly and use a piece of wood to
push the planer blade (23) to the side and out of the
blade head (16).
– Turn the blade head 180° and remove the second planer
blade.
Fitting the Planer Blades (see figures I–J)
The guide groove on the planer blade ensures a constant,
even height setting when changing or turning the blade.
If necessary, clean the blade seat in the blade head (16) and
the planer blade (23).
When fitting the planer blade, ensure that it is correctly
seated in the mounting guide of the blade head (16).
The planer blade must be fitted and aligned with the centre
of the planer base plate (11). Then tighten the three
fastening screws (14) using the Torx key (13), following the
tightening sequence (①②③) specified on the clamping jaw
(15).
Note: Check that the fastening screws (14) are firmly
tightened before start-up. Turn the blade head (16) by hand
and ensure that the planer blades are not brushing against
anything.
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