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CT21081H-2 BMC
Руководство по эксплуатации Страница: 36

Crown CT21081H-2 BMC [36/220] Power tool maintenance preventive measures

Crown CT21082H-2 BMC [36/220] Power tool maintenance preventive measures

English

ceeding 70°C� The system guarantees protection of

the power tool from damage in case of noncompliance

with the operation conditions�

Indicators of the state of battery charge (see g. 14)

With the push of the button 10 the indicators 11 show

the state of charge of the battery 2 (see g. 14).

LED lamp

When the on / off switch 6 is pushed, the LED lamp 2

is automatically switched on that allows to carry out

works in low light conditions�

Torque regulator

Rotate the regulator 5 in order to set one of the 21

torque values most suitable for the work performed�

It is recommended to set the torque

regulator 5 into the position "Drill" to perform

drilling�

Stepless speed adjustment

Speed is controlled from 0 to maximum by

pressing force of on / off switch 7� Weak

pressing results in low revolutions, which

enable a smooth power tool switch-on�

Step speed selector switch

Attention: one can only change the revo-

lutions per minute range after the engine

fully stops.

In order to choose the "1" gear, move the switch 6

back� This mode is used for the fastening of screws or

for large diameter hole drilling�

In order to choose the "2" gear, move the switch 6

forward� This mode is used for speed drilling of small

diameter holes�

Changing the rotational directions (see g. 15)

Change the direction of rotation only after

a full stop of the motor, acting otherwise

may cause damage to the power tool.

Clockwise rotation (drilling, fastening of screws) -

move the reverse switch 8 to the left as it is shown in

g. 15.1.

Counter clockwise rotation (unscrewing the

screws) - move the reverse switch 8 to the right as it is

shown in g. 15.2.

Spindle automatic locking

If the on / off switch 7 is not pressed, the spindle of the

power tool is locked this enables to use the power tool

as an ordinary screwdriver (for example it can be used

to tighten manually screws or bolts, if the battery is low)�

Break rundown

Break rundown stops the spindle of the power tool

immediately after the power tool is turned off� This

helps to avoid an excessive tightening of the bolts and

screws and prevents work pieces, screwdriver bits and

slots of fastening elements from being damaged�

Recommendations on the power tool

operation

Drilling (see g. 16-17)

[CT21081H-2, CT21081H-4, CT21082H-1.5,

CT21082H-2, CT21082H-4; and with installed

quick-change keyless chuck: CT21081HQ-2,

CT21081HQ-4, CT21082HQ-1.5, CT21082HQ-2,

CT21082HQ-4]

• Grease the drill bit regularly when drilling holes in met-

als (except drilling non-ferrous metals and their alloys)�

• When drilling hard metals, apply more force to the

power tool and lower the rotation speed�

• When drilling large diameter holes in metal, rst drill

a hole with a smaller diameter and ream it till the nec-

essary diameter (see. g. 16.1).

• 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 gure 16.2.

• In order to decrease dust production when drilling

holes in walls and ceilings, take actions indicated in

g. 17.

Screwing the screws (see g. 18)

• To make fastening of screws easier and in order to

prevent cracking of the work pieces, rst 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 gure 18.

Power tool maintenance / preventive

measures

Before execution of any procedures, centre the re-

verse switch 8.

Battery maintenance instruction

• Charge timely before the battery 2 is completely

exhausted� Stop operation in low power and charge

it immediately�

• Do not overcharge when the battery 2 is full, other-

wise it will shorten the life time�

• Charge battery 2 in the room temperature of 10°C

to 40°C (50°F to 104°F)�

• Charge battery 2 every 6 months without operation

for a long time�

• Replace worn out batteries in time� Decline of pro-

duction or a signicantly shorter runtime of the power

tool after charging indicates aging of the battery 2 and

the need for replacement� It should be taken into ac-

count that the battery 2 may discharge faster if the

works take place in the temperature below 0°С.

• In case of long time storage without use, it is recom-

mended to store the battery 2 at room temperature, it

should be charged to 50%�

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

Crown CT21081H-2 BMC [36/220] Power tool maintenance preventive measures

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