Environmental Protection - Crown CT21075HMX-2 Original Instructions Manual

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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�

The manufacturer reserves the possibility to introduce changes.

• 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�