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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, fire 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 flammable 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.

Unmodified 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 influence 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 finger 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 affect the power tool's
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 different from
those intended could result in a hazardous situation.

5) Service

a) Have your power tool serviced by a qualified repair

person using only identical replacement parts.

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

PRECAUTION
Keep children and infirm persons away.
When not in use, tools should be stored out of reach of children and
infirm persons.

 01Eng_DH50MRY_ENG

7/18/13, 8:54 AM

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Summary of Contents for DH 50MR

Page 1: ...using this Electric Power Tool carefully read through these HANDLING INSTRUCTIONS to ensure efficient safe operation It is recommended that these INSTRUCTIONS be kept readily available as an important reference when using this power tool 001Cover_DH50MRY_ENG 07 8 8 19 08 1 ...

Page 2: ... picking up or carrying the tool Carrying power tools with your finger 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 b...

Page 3: ...rill bit taper shank No 1 11 12 3 12 7 14 3 14 5 17 5 mm ROTARY HAMMER SAFETY WARNINGS 1 Wear ear protectors Exposure to noise can cause hearing loss 2 Use auciliary 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 a...

Page 4: ...accessories PRIOR TO OPERATION 1 Power source Ensure that the power source to be utilized conforms to the power requirements specified on the product nameplate 2 Power switch Ensure that the power switch is in the OFF position If the plug is connected to a power receptacle while the power switch is in the ON position the power tool will start operating immediately which could cause a serious accid...

Page 5: ...ry Fig 5 Tool shank Grease Tool Part of SDS max shank Front cap Grip Dial Fig 1 2 To attach the tool SDS max shank insert it into the hole until it contacts the innermost end of the hole as illustrated in Fig 2 If you continue to turn the tool with slight pressure you can feel a spot where there is a hitch At that spot pull the grip to the direction of an arrow mark and insert the tool all the way...

Page 6: ...ammering 1 Switching to hammering a Push the button release lock and turn the selector lever counterclockwise b Align of the selector lever and of the lever holder as illustrated in Fig 7 c Release the button to lock the selector lever Fig 7 Fig 8 c Turn the grip as illustrated in Fig 9 and fix the tool to the desired working direction Fig 9 d Switch the selector lever to hammering according to th...

Page 7: ...s such as drill chuck and chuck adapter are attached Use it with the selector lever positioned at rotation hammering CAUTION During operation be sure to grip the handle and the side handle firmly to prevent your body from swaying 1 Switching to rotation hammering For switching to rotation hammering follow the same procedures mentioned in 3 When drilling at rotation hammering 2 Attaching chuck adap...

Page 8: ...t tip When the position of the concave is shifted by turning the guide plate right or left the guide plate never slips off even when the drill is used in a downward direction Fig 17 Fig 17 2 Drilling holes 1 Insert the plug into a receptacle 2 A spring is built in the center pin By straightly and gently pressing it to the wall or floor surface the entire surface of the core bit tip attains contact...

Page 9: ...s 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...

Page 10: ...10 DH50MRY 02Back_DH50MRY_ENG 07 8 8 19 06 10 ...

Page 11: ...NAL 1 72 TERMINAL 1 73 CORD ARMOR 1 ITEM NO PART NAME Q TY 74 TAPPING SCREW W FLANGE D4 16 4 75 CORD CLIP 1 76 CORD 1 77 CYLINDER O RING I D 69 3 1 78 RETAINING RING FOR D12 SHAFT 1 79 CRANK SHAFT 1 80 FEATHER KEY 3 3 25 1 81 RETAINING RING FOR D47 HOLE 1 82 BALL BEARING 6204DDCMPS2L 1 83 O RING B 1 84 OIL SEAL 1 85 HEX SOCKET HD BOLT W FLANGE M5 16 4 86 CRANK COVER 1 87 CYLINDER O RING B 2 88 WEI...

Page 12: ...12 DH50MR 02Back_DH50MRY_ENG 07 8 8 19 06 12 ...

Page 13: ...SOCKET HD BOLT M5 16 6 68 DISTANCE PIECE B 4 69 TAPPING SCREW W FLANGE D4 25 3 70 SWITCH B 1 71 PILLAR TERMINAL 1 72 TERMINAL 1 73 CORD ARMOR 1 ITEM NO PART NAME Q TY 74 TAPPING SCREW W FLANGE D4 16 4 75 CORD CLIP 1 76 CORD 1 77 CYLINDER O RING I D 69 3 1 78 RETAINING RING FOR D12 SHAFT 1 79 CRANK SHAFT 1 80 FEATHER KEY 3 3 25 1 81 RETAINING RING FOR D47 HOLE 1 82 BALL BEARING 6204DDCMPS2L 1 83 O ...

Page 14: ...14 02Back_DH50MRY_ENG 07 8 8 19 06 14 ...

Page 15: ...15 02Back_DH50MRY_ENG 07 8 8 19 06 15 ...

Page 16: ...308 Code No C99166612 N Printed in Japan Hitachi Koki Co Ltd Shinagawa Intercity Tower A 15 1 Konan 2 chome Minato ku Tokyo Japan 02Back_DH50MRY_ENG 7 19 13 4 06 PM 16 ...

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