Crown CT10032 Original Instructions Manual page 22

Impact drilling:
To switch to this operation mode, turn
switch 5 so that the Impact drilling sign coin-
cides with the mark on the body�
[CT10120]
Drilling, screwing, unscrewing:
To switch to this operation mode, move
5
switch 5 right to the stop�
Impact drilling:
To switch to this operation mode, move
switch 5 left to the stop�
One can switch to another operation mode without
stopping the power tool, simply decrease pressure
applied to it to some extent.
Stepless speed adjustment
Speed is controlled from 0 to maximum by
pressing force of on / off switch 9� Weak
pressing results in low revolutions, which
enable a smooth power tool switch-on�
Speed selector thumbwheel
Use speed control 8 to set required revolutions and
impact frequency�
• Push on / off switch 9 and lock it in the position with
lock-on button 10�
• Set the needed speed�
The required speed is dependent on the material and
can be determined with practical trials�
When operating your power tool at a low speed for a long
time, it has to be cooled down for 3 minutes� To do it, set
a maximum speed and leave your power tool to run idle�
Step speed selector switch
Attention: one can only change the revo-
lutions per minute range after the engine
fully stops.
The first speed - you can find the values of
the revolutions per minute range in the tech-
nical specifications table.
The second speed - you can find the val-
ues of the revolutions per minute range in
the technical specifications table.
Changing the rotational directions
Change the direction of rotation only
after a full stop of the motor, acting oth-
erwise may cause damage to the power
tool.
Rotation to the right (drilling, screwing in) - move
the rotational direction switch 7 to the right�
Rotation to the left (unscrewing) - move the rota-
tional direction switch 7 to the left�
Recommendations on the power tool
operation
Drilling (see fig. 8-11)
• Grease the drill bit regularly when drilling holes in
metals (except drilling non-ferrous metals and their al-
loys)�
• When drilling hard metals, apply more force to the
power tool and lower the rotation speed�
• When drilling large diameter holes in metal, first drill
a hole with a smaller diameter and ream it till the nec-
essary diameter (see fig. 8).
• In order to avoid splitting of the surface at an exit
point of a drill bit when drilling holes in wood, follow the
instructions shown in figure 9.
• In order to decrease dust production when drilling
holes in walls and ceilings, take actions indicated in
fig. 10.
• When drilling holes in glazed ceramic tiles, in order
to improve the drill centering accuracy and to save the
glaze from damage, apply adhesive tape to the pre-
sumed hole center and drill after that (see fig. 11). Start
drilling at lower speed increasing it as the hole deep-
ens� Caution: drill tiles in the impactless drilling
operation mode only.
Impact drilling
During the impact drilling, the result does not depend
on the pressure applied to the power tool - this is
caused due to the peculiarities in the impact mecha-
nism design� That is why you should not apply exces-
sive pressure to the power tool - it can jam the drill and
overload the engine�
Screwing the screws (see fig. 12)
• To make fastening of screws easier and in order
to prevent cracking of the work pieces, first drill a
hole with a diameter equal to 2/3 of a diameter of the
screw�
• If you are connecting work pieces with the help of
screws, in order to achieve durable joint without get-
ting cracks, fracturing or layering, take actions shown
in figure 12.
Power tool maintenance / preventive
measures
Before carrying out any works on the power tool it
must be disconnected from the mains�
Cleaning of the power tool
An indispensable condition for a safe long-term exploi-
tation of the power tool is to keep it clean� Regularly
flush the power tool with compressed air thought the
ventilation slots 6�
After-sales service and application service
Our after-sales service responds to your questions
concerning maintenance and repair of your product as
English
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