Bosch GSH 27 VC Professional Manual Original página 12

12 | English
increase the vibration and noise emissions over the total
working period.
To estimate vibration and noise emissions accurately, the
times when the tool is switched off or when it is running but
not actually being used should also be taken into account.
This may significantly reduce vibration and noise emissions
over the total working period.
Implement additional safety measures to protect the oper-
ator from the effects of vibration, such as servicing the
power tool and application tools, keeping their hands warm,
and organising workflows correctly.
Assembly
Pull the plug out of the socket before carrying out any
u
work on the power tool.
Changing the Tool
– Clean the tool shank (5) and apply a light coat of grease.
Application tools without collar (see figures A – B)
– Pivot the tool retainer (3) upwards by approx. 150° and
insert the application tool into the tool holder (4).
– Pivot the tool retainer (3) back down to lock the applica-
tion tool in place.
– Check that it is locked by pulling on the tool.
Application tools with collar (see figures C – D)
Application tools with an insertion length of 152 mm (6") to
the collar can be used.
– Pivot the tool retainer (3) upwards by approx. 180° and
insert the application tool into the tool holder (4).
– Pivot the tool retainer (3) back as far as the application
tool to lock it in place. The collar (6) must be held by the
tool retainer (3).
– Check that it is locked by pulling on the tool.
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 carci-
nogenic, especially in connection with wood-treatment ad-
ditives (chromate, wood preservative). Materials containing
asbestos may only be worked by specialists.
– 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 ma-
terials to be worked.
Operation
Pull the plug out of the socket before carrying out any
u
work on the power tool.
1 609 92A 7ES | (10.11.2022)
Starting Operation
Pay attention to the mains voltage! The voltage of the
u
power source must match the voltage specified on the
rating plate of the power tool.Power tools marked
with 230 V can also be operated with 220 V.
Products that are only sold in AUS and NZ: Use a resid-
u
ual current device (RCD) with a nominal residual current
of 30 mA or less.
Switching On and Off
– To start the power tool, press and hold the on/off switch
(1).
– To switch off the power tool, release the on/off
switch (1).
At low temperatures, the power tool will take a certain
amount of time to reach its full impact performance. You can
shorten this warm-up time by tapping the power tool's inser-
ted application tool on the ground once.
Starting Operation
Pay attention to the mains voltage! The voltage of the
u
power source must match the voltage specified on the
rating plate of the power tool.Power tools marked
with 230 V can also be operated with 220 V.
Products that are only sold in AUS and NZ: Use a resid-
u
ual current device (RCD) with a nominal residual current
of 30 mA or less.
Switching On and Off
– To start the power tool, press and hold the on/off switch
(1).
– To switch off the power tool, release the on/off
switch (1).
At low temperatures, the power tool will take a certain
amount of time to reach its full impact performance. You can
shorten this warm-up time by tapping the power tool's inser-
ted application tool on the ground once.
Working Advice
For the highest possible impact damping, work only with
moderate pressure.
Sharpening Chisels
Only sharp chiselling tools will produce good results, there-
fore sharpen your chiselling tools in good time before use.
This will ensure a long service life for the tools and good
work results.
Re-sharpening
Grind chiselling tools against sanding discs, e.g. aluminium
oxide, under a steady stream of water. Make sure that the
cutting edges show no annealing colours; this will impair the
hardness of the chiselling tools.
To forge a chisel, heat it to 850–1050 °C (pale red to yel-
low).
To harden a chisel, heat it to approx. 900 °C and quench in
oil. Then, leave it in an oven for approx. one hour at 320 °C
(annealing colour: pale blue).
Bosch Power Tools