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OBJ_BUCH-2509-002.book Page 22 Tuesday, October 25, 2016 2:36 PM
22 | English
– Loosen the two screws 12 again and pull the plug insert 11
out of the plug housing of the CEE plug 14.
– Loosen the conductor ferrules of the black and brown con-
ductors from their contact tubes.
– Now, insert the conductor ferrule of the black conductor
L3 into contact tube L1, and the conductor ferrule of the
brown conductor L1 into contact tube L3.
– Firmly tighten the small screws 13 in the plug insert 11 to
affix the conductors.
– Reinsert plug insert 11 into the housing of the CEE plug 14
and tighten both screws 12 again.
– Afterwards, check the proper function of the protective
conductor.
– Reconnect the power tool to the power supply.
Operation
Starting Operation
The voltage and frequency of the power source must
correspond with the data on the type plate of the power
tool.
Check grinding tools before using. The grinding tool
must be mounted properly and be able to move freely.
Carry out a test run for at least one minute with no load.
Do not use damaged, out-of-centre or vibrating grind-
ing tools. Damaged grinding tools can burst and cause in-
juries.
If the machine should unexpectedly stop operating
even though the On/Off switch 3 is in the "On" position,
set the On/Off switch to "Off". This will prevent uncon-
trolled restarting of the machine. Before restarting the ma-
chine, check the power supply (see "Connection to the
Power Supply", page 21).
To save energy, only switch the power tool on when using it.
Always connect the power tool to the frequency con-
verter first, before connecting the frequency convert-
er to the mains supply.
Switching the Frequency Converter On/Off
The frequency converter must be put into operation first be-
fore actuating the power tool.
For this, observe the operating instructions of the frequency
converter.
Switching the Power Tool On/Off
– To start the power tool, press the On/Off switch 3 forward
and then down.
– To lock-on the pressed On/Off switch 3, push the On/Off
switch 3 further forward.
– To switch off the power tool, release the On/Off switch 3,
or when it is locked, briefly press the On/Off switch 3 and
then release it.
Working Advice
Disconnect the power supply before making any ad-
justments, changing accessories, or placing the ma-
chine aside. This safety measure prevents accidental
starting of the power tool.
1 609 92A 36J | (25.10.16)
Clamp the workpiece if it does not remain stationary
due to its own weight.
Do not strain the machine so heavily that it comes to a
standstill.
After heavily straining the power tool, continue to run
it at no-load for several minutes to cool down the acces-
sory.
Application tools can become very hot while working.
Do not touch them before they have cooled down.
Working with the Straight Grinder
The choice of the application tools, such as grinding points or
flap discs, depends on the application case and area.
For support on choosing the appropriate grinding accessory,
please contact your Bosch specialist shop.
Optimum grinding results are achieved when the grinding tool
is moved uniformly back and forth with light pressure.
Pressure that is too strong reduces the performance capabil-
ity of the machine and causes the grinding tool to wear more
quickly.
Grinding with Grinding Point
For grinding points, the grinding medium, e.g. corundum or
silicone carbide, is formed and bond with suitable bonding
agents and possibly with reinforcement inlays, thus repre-
senting a grinding and load-carrying unit. During operation,
both the grinding and bonding agent are "used up" evenly,
whereby the size of the grinding point gradually becomes
smaller.
Grinding points are particularly suitable for precision me-
chanical work, mould making and for deburring metal. Due to
the high circumferential speed, the workpiece is subject to
high heat development.
Grinding with Grinding Discs
When grinding, the best working results are achieved when
the grinding disc is applied as flat as possible. Move the ma-
chine back and forth applying moderate pressure. This en-
sures that the workpiece does not become too hot, and is not
subject to discolouration and grooves.
Maintenance and Service
Maintenance and Cleaning
Disconnect the power supply before making any ad-
justments, changing accessories, or placing the ma-
chine aside. This safety measure prevents accidental
starting of the power tool.
For safe and proper working, always keep the machine
and ventilation slots clean.
In extreme conditions, always use dust extraction as
far as possible. Blow out ventilation slots frequently
and install a portable residual current device (PRCD).
When working metals, conductive dust can settle in the in-
terior of the power tool. The total insulation of the power
tool can be impaired.
Regularly measure the no-load speed of the grinder
spindle. When the measured value is more than 10 %
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