Hitachi DH 50SA1 Handling Instructions Manual
Rotary Hammer
Model DH 50SA1
Handling instructions
Note:
Before 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.
GENERAL SAFETY RULES
WARNING!
Read all instructions
Failure to follow all instructions listed below may result in
electric shock, fire and/or serious injury.
The term “power tool” in all of the warnings listed below
refers to your mains operated (corded) power tool or battery
operated (cordless) power tool.
SAVE THESE INSTRUCTIONS
1) Work area
a) Keep work area clean and well lit.
Cluttered and 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 of 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) Recommendation for the use of residual current
device with a rated residual current of 30mA
or less.
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 safety equipment. Always wear eye protection.
Safety equipment such as dust mask, non-skid
safety shoes, hard hat, or hearing protection used
for appropriate conditions will reduce personal
injuries.
c) Avoid accidental starting. Ensure the switch is in
the off position before plugging in.
2
Carrying power tools with your finger on the
switch or plugging in 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 these devices 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 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
tools 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 and in the
manner intended for the particular type of power
tool, taking into account the working conditions
and the work to be performed.
Use of the power tool for operations different from
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.
PRECAUTIONS ON USING ROTARY HAMMER
1. Wear ear protections
Exposure to noise can cause hearing loss.
2. Do not touch the bit during or immediately after
operation. The bit becomes very hot during
operation and could cause serious burns.
3. Before starting to break, chip or drill into a wall,
floor or ceiling, thoroughly confirm that such items
as electric cables or conduits are not buried inside.
4. Use auxiliary handles supplied with the tool.
Loss of control can cause personal injury.
5. Always hold the body handle and side handle of
the power tool firmly. Otherwise the counterforce
produced may result in inaccurate and even
dangerous operation.
6. Wear a dust mask
Do not inhale the harmful dusts generated in
drilling or chiseling operation. The dust can
endanger the health of yourself and bystanders.
SPECIFICATIONS
Voltage (by areas)* (230V, 240V)
Input* 1140W
Capacity Drill bit: 50 mm
No load speed 300 min
Full-load impact rate 2450 min
Weight (without cord, side handle) 9.8 kg
* Be sure to check the nameplate on product as it is subject to change by areas.
STANDARD ACCESSORIES
䡬 Large-dia. hole boring (Rotation + Striking):
(1) Case ........................................................................... 1
(2) Side handle II type: Bar type handle ............... 1
Either type I or type II Side handle is attached.
(3) Stopper (I type Side handle only) ....................... 1
(4) Dust cover ................................................................. 1
(5) Hammer grease A ................................................... 1
Standard accessories are subject to change without notice.
OPTIONAL ACCESSORIES (sold separately)
䡬 Through-hole drilling:
I type: Side handle ...................... 1
D type handle .................. 1
(1) Center Pin (Guide (2) Core (3) Core bit
(1) Center pin
Applied to core bits from 50 mm to 125 mm.
(2) Core bit
External dia.: 50, 65, 80, 90, 100, 125 mm
(3) Core bit shank
䡬 Crushing:
Core bit: 125 mm
plate) bit shank
-1
-1
(1) Drill bit (hexagon shank)
Total length: 420, 570 mm
External dia.: 16, 18, 20, 22, 25, 28, 30, 32, 35, 38,
40, 44, 50 mm
䡬 Anchor hole drilling (Rotation + Striking):
(3) Cotter
(1) K-Taper shank adapter (2) A-Taper
sleeve
(1) Cold chisel
Total length: 300, 380, 450 mm
䡬 Groove digging and edging:
(1) Cold chisel
Total length: 300, 380, 450 mm
䡬 Asphalt cutting:
(1) Cutter
Width: 50, 75 mm
Total length: 400 mm
3
䡬 Syringe (for chip removal):
䡬 Hammer grease A:
500 g (in a can)
30 g (in a green tube)
Optional accessories are subject to change without notice.
APPLICATIONS
䡬 Drilling holes in concrete
䡬 Drilling anchor holes
䡬 Crushing concrete, chipping, digging, and squaring
(by applying optional 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 receptacle while the
power switch is in the ON position, the power tool
will start operating immediately, which could cause
a serious accident.
3. Extension cord
When the work area is removed from the power
source, use an extension cord of sufficient thickness
and rated capacity. The extension cord should be
kept as short as practicable.
4. How to install dust cover (Fig. 1)
Always install the dust cover in the drill bit or the
taper shank adapter.
Insert the dust cover until it lies flush in the groove.
NOTE
For a thick drill bit, insert the dust cover from drill
rear.
Front cover
Tool shank
(3) Turn the tool holder and align the front cover mark
with the tool holder mark to secure.
NOTE
Remove in the reverse order of installation.
Tool
holder
Fig. 2
HOW TO USE THE ROTARY HAMMER
1. How to drill holes (Fig. 3)
Fig. 3
(1) Use the side handle or the Bar type handle.
Do not use D type handle during drilling operation,
since it may not be enough to hold the body firmly.
D type handle
Dust cover
5. How to install tool
NOTE
For tools such as a bull point and a cold chisel,
use only HITACHI genuine parts.
(1) Clean, the smear the tool shank with the grease
provided in the orange tube.
(2) Slide the tool holder in the direction of arrow A
and rotate it 180˚.
Turn the notch of the tool shank downward and
insert it fully into the hexagonal hole of the front
cover. (Fig. 2)
4
Insert up to the groove
Fig. 1
Bar type handle
Fig. 4
(2) Pull the switch trigger after applying the drill bit
tip to the drilling position.
(3) It is unnecessary to forcibly press the rotary hammer
main body. It is sufficient to slightly press the rotary
hammer to an extent that chips are freely discharged.
CAUTION
Although this machine is equipped with a safety
clutch, if the drill bit becomes bound in concrete
or other material, the resultant stoppage of the drill
bit could cause the machine body to turn in reaction.
Ensure that the main handle and the bar type handle
are gripped firmly during operation.
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