CROWN CT21076HMX - Инструкция по эксплуатации - Страница 34

34

English

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 fig. 21-23)

•

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, first drill 

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

essary diameter (see fig. 21.1).

•

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 figure 21.2.

•

In order to decrease dust production when drilling 

holes in walls and ceilings, take actions indicated in 

fig. 22.

•

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 presumed hole 

center and drill after that (see fig. 23). Start drilling at low

-

er speed increasing it as the hole deepens� 

Caution: for 

models CT21075HMX-2, CT21075HMX-4 - drill tiles in 

the impactless drilling operation mode only.
Impact drilling
[CT21075HMX-2, CT21075HMX-4]

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. 24)

•

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 24.

Power  tool  maintenance  /  preventive 

measures

Before execution of any procedures, centre the re

-

verse switch 12.
Battery maintenance instruction

•

Charge timely before the battery 

15 

is completely 

exhausted� Stop operation in low power and charge it 

immediately� 

•

Do not overcharge when the battery 

15

 is full, other-

wise it will shorten the life time� 

•

Charge battery 

15

 in the room temperature of 10°C  

to 40°C (50°F to 104°F)�

•

Charge battery 

15 

every 6 months without operation 

for a long time�

•

Replace worn out batteries in time� Decline of pro-

duction or a significantly shorter runtime of the power 

tool after charging indicates aging of the battery 

15

 and 

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

count that the battery 

15

 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 

15

 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 

flush  the  power  tool  with  compressed  air  thought  the 

ventilation slots 

9

�

After-sales service and application service

Our after-sales service responds to your questions 

concerning maintenance and repair of your product as 

well as spare parts� Information about service centers, 

parts diagrams and information about spare parts can 

also be found under:

 www.crown-tools.com

.

Transportation of the power tools

•

Categorically not to drop any mechanical impact on 

the packaging during transport�

•

When unloading / loading is not allowed to use any 

kind of technology that works on the principle of clamp-

ing packaging�

Li-Ion batteries

The contained Li-Ion batteries are subject to the Danger-

ous Goods Legislation requirements� The user can trans-

port the batteries by road without further requirements�

When being transported by third parties (e�g�: air trans-

port or forwarding agency), special requirements on 

packaging and labelling must be observed� For prepa-

ration of the item being shipped, consulting an expert 

for hazardous material is required�

Dispatch batteries only when the housing is undam-

aged� Tape or mask off open contacts and pack up the 

battery in such a manner that it cannot move around 

in the packaging� Please also observe possibly more 

detailed national regulations�

Environmental protection

Recycle raw materials instead of dispos

-

ing as waste. 

Power tool, accessories and packaging should 

be sorted for environment-friendly recycling�

The plastic components are labelled for categorized 

recycling�

These instructions are printed on recycled paper man-

ufactured without chlorine�

The manufacturer reserves the possibility to introduce changes.