Impact Drill

Model DV20VB2

Handling instructions

Note:

Before using this Electric Power Tool, carefully read through these

HANDLING INSTRUCTIONS to ensure effi cient, safe operation. It is recommended that these INSTRUCTIONS be kept readily available as an important reference when using this power tool.

English

GENERAL POWER TOOL SAFETY WARNINGS

WARNING

Read all safety warnings and all instructions.

Failure to follow the warnings and instructions may result in electric shock, fi re and/or serious injury.

Save all warnings and instructions for future reference.

The term “power tool” in the warnings refers to your mains-operated (corded) power tool or battery-operated

(cordless) power tool.

1) Work area safety a) Keep work area clean and well lit.

Cluttered or dark areas invite accidents.

b) Do not operate power tools in explosive atmospheres, such as in the presence of fl ammable liquids, gases or dust.

Power tools create sparks which may ignite the dust or fumes.

c) Keep children and bystanders away while operating a power tool.

Distractions can cause you to lose control.

2) Electrical safety a) Power tool plugs must match the outlet.

Never modify the plug in any way.

Do not use any adapter plugs with earthed

(grounded) power tools.

Unmodifi ed plugs and matching outlets will reduce risk of electric shock.

b) Avoid body contact with earthed or grounded surfaces, such as pipes, radiators, ranges and refrigerators.

There is an increased risk of electric shock if your body is earthed or grounded.

c) Do not expose power tools to rain or wet conditions.

Water entering a power tool will increase the risk of electric shock.

d) Do not abuse the cord. Never use the cord for carrying, pulling or unplugging the power tool.

Keep cord away from heat, oil, sharp edges or moving parts.

Damaged or entangled cords increase the risk of electric shock.

e) When operating a power tool outdoors, use an extension cord suitable for outdoor use.

Use of a cord suitable for outdoor use reduces the risk of electric shock.

f) If operating a power tool in a damp location is unavoidable, use a residual current device

(RCD) protected supply.

Use of an RCD reduces the risk of electric shock.

3) Personal safety a) Stay alert, watch what you are doing and use common sense when operating a power tool.

Do not use a power tool while you are tired or under the infl uence of drugs, alcohol or medication.

A moment of inattention while operating power tools may result in serious personal injury.

b) Use personal protective equipment. Always wear eye protection.

Protective equipment such as dust mask, non-skid safety shoes, hard hat, or hearing protection used for appropriate conditions will reduce personal injuries.

c) Prevent unintentional starting. Ensure the switch is in the off position before connecting to power source and/or battery pack, picking up or carrying the tool.

Carrying power tools with your fi nger on the switch or energising power tools that have the switch on invites accidents.

d) Remove any adjusting key or wrench before turning the power tool on.

A wrench or a key left attached to a rotating part of the power tool may result in personal injury.

e) Do not overreach. Keep proper footing and balance at all times.

This enables better control of the power tool in unexpected situations.

f) Dress properly. Do not wear loose clothing or jewellery. Keep your hair, clothing and gloves away from moving parts.

Loose clothes, jewellery or long hair can be caught in moving parts.

g) If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used.

Use of dust collection can reduce dust-related hazards.

4) Power tool use and care a) Do not force the power tool. Use the correct power tool for your application.

The correct power tool will do the job better and safer at the rate for which it was designed.

b) Do not use the power tool if the switch does not turn it on and off .

Any power tool that cannot be controlled with the switch is dangerous and must be repaired.

c) Disconnect the plug from the power source and/or the battery pack from the power tool before making any adjustments, changing accessories, or storing power tools.

Such preventive safety measures reduce the risk of starting the power tool accidentally.

d) Store idle power tools out of the reach of children and do not allow persons unfamiliar with the power tool or these instructions to operate the power tool.

Power tools are dangerous in the hands of untrained users.

e) Maintain power tools. Check for misalignment or binding of moving parts, breakage of parts and any other condition that may aff ect the power toolʼs operation.

If damaged, have the power tool repaired before use.

Many accidents are caused by poorly maintained power tools.

f) Keep cutting tools sharp and clean.

Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control.

g) Use the power tool, accessories and tool bits etc. in accordance with these instructions, taking into account the working conditions and the work to be performed.

Use of the power tool for operations diff erent from those intended could result in a hazardous situation.

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5) Service a) Have your power tool serviced by a qualifi ed repair person using only identical replacement parts.

This will ensure that the safety of the power tool is maintained.

PRECAUTION

Keep children and infi rm persons away.

When not in use, tools should be stored out of reach of children and infi rm persons.

IMPACT DRILL SAFETY WARNINGS

1. Wear ear protectors when impact drilling.

Exposure to noise can cause hearing loss.

2. Use auxiliary handle(s), if supplied with the tool.

Loss of control can cause personal injury.

3. Hold power tool by insulated gripping surfaces, when performing an operation where the cutting accessory may contact hidden wiring or its own cord.

Cutting accessory contacting a “live” wire may make exposed metal parts of the power tool “live” and could give the operator an electric shock.

4. Before drilling into walls, ceilings or fl oors, ensure that there are no concealed power cables inside.

5. Always use side handle and hold the tool fi rmly with both hands.

6. Always use the impact drill with clockwise rotation, when using it as an impact drill. (Fig . 1)

Fig. 1

SPECIFICATIONS

Voltage (by areas)*

Power input

Speed change

No load speed

Capacity

Full load impact rate

Steel

Concrete

Wood

1

(110 V, 220 V, 230 V, 240 V)

730 W*

0 – 1000 /min

13 mm

20 mm

40 mm

8000 /min

Weight (without cord)

* Be sure to check the nameplate on product as it is subject to change by areas.

2.2 kg

2

0 – 3000 /min

8 mm

13 mm

25 mm

26000 /min

STANDARD ACCESSORIES

(1) Chuck Wrench (Spec. only for keyed chuck) ...............1

(2) Side Handle ..................................................................1

(3) Depth Gauge ................................................................1

Standard accessories are subject to change without notice.

OPTIONAL ACCESSORIES (sold separately)

(1) Impact Drill Bit (for concrete)

3.2 mm – 20 mm dia.

Optional accessories are subject to change without notice.

APPLICATIONS

○ By combined actions of ROTATION and IMPACT:

Boring holes in hard materials (concrete, marble, granite, tiles, etc.)

○ By ROTATIONAL action:

Boring holes in metal, wood and plastic.

PRIOR TO OPERATION

1. Power source

Ensure that the power source to be utilized conforms to the power requirements specifi ed on the product nameplate.

2. Power switch

Ensure that the power switch is in the OFF position. If the plug is connected to a receptacle while the power switch is in the ON position, the power tool will start operating immediately, inviting serious accident.

3. Extension cord

When the work area is removed from the power source, use an extension cord of suffi cient thickness and rated capacity. The extension cord should be kept as short as practicable.

4. Selecting the appropriate drill bit

○ When boring concrete or stone

Use the drill bits specifi ed in the Optional Accessories.

○ When boring metal or plastic

Use an ordinary metalworking drill bit.

○ When boring wood

Use an ordinary woodworking drill bit.

However, when drilling 6.5 mm or smaller holes, use a metalworking drill bit.

5. Mounting and dismounting of the bit.

For keyed chuck (Fig. 2)

(1) Open the chuck jaws, and insert the bit into the chuck.

(2) Place the chuck wrench in each of the three holes in the chuck, and turn it in the clockwise direction (viewed from the front side). Tighten securely.

(3) To remove the bit, place the chuck wrench into one of the holes in the chuck and turn it in the counterclockwise direction.

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Chuck wrench

Drill chuck

Loosen

Sleeve

Ring

Tighten

Tighten

Loosen

Fig. 2

For keyless chuck

The country of use will determine whether Type A or Type B keyless chuck is required.

○ Type A (Fig. 3)

(1) Mounting the bit

Turn the lock collar in the direction “AUF” and open the chuck. After inserting the drill bit into the chuck as far it will go, turn the lock collar in the “ZU” direction.

Grip the ring and close the chuck by turning the sleeve clockwise as viewed from the front.

(2) Dismounting the bit

Turn the lock collar in the direction “AUF” to release the chucking force. Grip the ring and open the chuck by turning the sleeve counterclockwise.

Lock collar

Sleeve Loosen

Ring

Fig. 5

NOTE

When the sleeve does not become loose any further, fi x the side handle to ring, hold side handle fi rmly, then turn the sleeve to loosen by hand. (Fig. 4)

6. Check the rotational direction (Fig. 6)

The bit rotates clockwise (viewed from the rear side) by pushing the R-side of the push button.

The L-side of the push button is pushed to turn the bit counterclockwise.

(The and marks are provided on the body.)

CAUTION

Always use the impact drill with clockwise rotation, when using it as an impact drill.

mark

Push button

Switch trigger

Tighten

Fig. 3

NOTE

When the sleeve does not become loose any further, fi x the side handle to ring, hold side handle fi rmly, then turn the sleeve to loosen by hand. (Fig. 4)

Ring

mark

Fig. 6

7. Fixing the side handle (Fig. 7)

Attach the side handle to the mounting part.

Rotate the side handle grip in a clockwise direction to secure it.

Set the side handle to a position that is suited to the operation and then securely tighten the side handle grip.

Loosen

Sleeve

Side handle

Fig. 4

○ Type B (Fig. 5)

(1) Mounting the bit

Turn the sleeve counterclockwise and open the chuck.

After inserting the drill bit into the chuck as far it will go, grip the ring and close the chuck by turning the sleeve clockwise as viewed from the front.

(2) Dismounting the bit

Grip the ring and open the chuck by turning the sleeve counterclockwise.

Side handle

Loosen Tighten

Fig. 7

To attach a depth gauge on the side handle, insert the gauge into the U-shaped groove on the side handle, adjust the position of the depth gauge in accordance with the desired depth of the hole, and fi rmly tighten the side handle grip. (Fig. 8)

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Depth gauge

Side handle

Loosen Tighten

Fig. 8

8. IMPACT to ROTATION changeover (Fig. 9)

Shift the change lever between the right and left positions to switch easily between IMPACT (rotation and impact) and ROTATION (rotation only), respectively.

To bore holes in hard materials such as concrete, stone and tiles, shift the change lever to the right-hand position (as indicated by the mark).

The drill bit operates by the combined actions of impact and rotation.

To bore holes in metal, wood and plastic, shift the change lever to the left-hand position (as indicated by the mark). The drill bit operates by rotational action only, as in the case of a conventional electric drill.

CAUTION

○ Do not use the Impact Drill in the IMPACT function if the material can be bored by rotation only. Such action will not only reduce drill effi ciency, but may also damage the drill tip.

○ Operating the Impact Drill with the change lever in mid-position may result in damage. When switching, make sure that you shift the change lever to the correct position.

Change lever

Fig. 10

10. RCD

The use of a residual current device with a rated residual current of 30 mA or less at all times is recommended.

HOW TO USE

Gear shift dial

1. Switch operation

○ When the trigger is depressed, the tool rotates. When the trigger is released, the tool stops.

○ The rotational speed of the drill can be controlled by varying the amount that the trigger switch is pulled.

Speed is low when the trigger switch is pulled slightly and increases as the trigger switch is pulled more.

○ The desired rotation speed can be pre-selected with the speed control dial.

Turn the speed control dial clockwise for higher speed and counterclockwise for lower speed. (Fig. 11)

○ Pulling the trigger and pushing the stopper, it keeps the switched-on condition which is convenient for continuous running. When switching off , the stopper can be disconnected by pulling the trigger again.

Stopper

Speed control dial

Low speed

High speed

Impact Rotation

Fig. 9

9. High-speed/Low-speed changeover:

Prior to changing speed, ensure that the switch is in the

OFF position, and the drill has come to a complete stop.

To change speed, rotate the gear shift dial as indicated by the arrow in Fig. 10. The numeral “1” engraved on the drill body denotes low speed, the numeral “2” denotes high speed.

If it is hard to turn the gear shift dial, turn the chuck slightly in either direction and then turn the gear shift dial again.

Switch trigger

Fig. 11

2. Drilling

○ When drilling, start the drill slowly, and gradually increasing speed as you drill.

○ Always apply pressure in a straight line with the bit. Use enough pressure to keep drilling, but do not push hard enough to stall the motor or defl ect the bit.

○ To minimize stalling or breaking through the material, reduce pressure on drill and ease the bit through the last part of the hole.

○ If the drill stalls, release the trigger immediately, remove the bit from the work and start again. Do not click the trigger on and off in an attempt to start a stalled drill.

This can damage the drill.

○ The larger the drill bit diameter, the larger the reactive force on your arm.

Be careful not to lose control of the drill because of this reactive force.

To fi rm control, establish a good foothold, use side handle, hold the drill tightly with both hands, and ensure that the drill is vertical to the material being drilled.

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MAINTENANCE AND INSPECTION

1. Inspecting the drill bits

Since use of an abraded drill bits will cause motor malfunctioning and degraded effi ciency, replace the drill bits with a new one or resharpening without delay when abrasion is noted.

2. Inspecting the mounting screws

Regularly inspect all mounting screws and ensure that they are properly tightened. Should any of the screws be loose, retighten them immediately. Failure to do so could result in serious hazard.

3. Maintenance of the motor

The motor unit winding is the very “heart” of the power tool. Exercise due care to ensure the winding does not become damaged and/or wet with oil or water.

4. Inspecting the carbon brushes

For your continued safety and electrical shock protection, carbon brush inspection and replacement on this tool should ONLY be performed by a Hitachi

Authorized Service Center.

5. Replacing supply cord

If the supply cord of Tool is damaged, the Tool must be returned to Hitachi Authorized Service Center for the cord to be replaced.

6. Service parts list

CAUTION:

Repair,

Tools must be carried out by a Hitachi Authorized

Service Center.

This Parts List will be helpful if presented with the tool to the Hitachi Authorized Service Center when requesting repair or other maintenance.

In the operation and maintenance of power tools, the safety regulations and standards prescribed in each country must be observed.

MODIFICATION:

Hitachi Power Tools are constantly being improved and modifi ed to incorporate the latest technological advancements.

Accordingly, some parts may be changed without prior notice.

NOTE

Due to HITACHI’s continuing program of research and development, the specifi cations herein are subject to change without prior notice.

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Hitachi Koki Co., Ltd.

Shinagawa Intercity Tower A, 15-1, Konan 2-chome,

Minato-ku, Tokyo, Japan

609

Code No. C99145013 F

Printed in China