Applications; Prior To Operation; How To Use The Rotary Hammer; Drilling And Driving-In Operations For Self-Drilling Anchors - Hitachi PR-25B Handling Instructions Manual

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○ Shank
(for rammer and bush hammer)
(Code No. 955186)
• Bush hammer + Shank
• Rammer + Shank
○ Scoop
(for digging ground in various foundation work)
(Code No. 944967)
○ Rotary hammer oil (one liter)
(Code No. 955009)
Optional accessories are subject to change without notice.

APPLICATIONS

○ Drilling holes in concrete
○ Drilling anchor bolt holes
○ Crushing concrete, chipping, digging, and squaring (by
applying optional accessories)
(Application Examples)
Installation of piping and wiring, sanitary facility
installation, machinery installation, water supply and
drainage work, interior jobs, harbor facilities and other
civil engineering work.

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. Grounding
This tool should be grounded while in use to protect the
operator from electric shock. The tool is equipped with a
three conductor cord and grounding type plug to fi t the
proper grounding type receptacle. The green (or green
and yellow) conductor in the cord is the grounding wire.
Never connect the green (or green and yellow) wire to a
live terminal.
3. 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
accident.
7
4. 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.
5. Feeding oil (refer to the paragraph on oil feeding,
page 7)
Prior to using the power tool, remove the oil gauge and
do not fail the oil tank with the provided oil. (Although the
oil tank is built in, it contains only a small volume of oil
when shipped from the Hitachi Works.)
6. Mounting a tool
NOTE
When handling drill bits, bull point, cold chisel and other
accessories, Hitachi standard tools are recommended
for better operation.
PR-25B
(1) Raise the retainer and insert the shank portion of a drill bit
into the hexagonal hole on the front cover until it reaches
the extremity. (Fig. 1-1)
(2) By slightly tapping the top of the bit holder with a wooden
mallet, replace the bit holder to grip the bit fi rmly.
PR-38E
(1) Pushing the stopper to arrow A direction, turning the
retainer to arrow B direction.
After, insert the tool shank into the hexagon hole on the
front cover. (Fig. 1-2)
(2) Pushing the stopper to arrow A direction, turning the
retainer to arrow B in the opposite direction. After, apart
the stopper.
NOTE
When dismounting the bull points, reverse the procedures
described above.

HOW TO USE THE ROTARY HAMMER

1. How to drill holes
(1) Pull the switch trigger after applying the drill bit tip to the
drilling position.
(2) It is unnecessary to forcibly press the Drill main body. It is
suffi cient to slightly press the Drill to an extent that clips
are freely discharged.
CAUTION
Although a safety clutch is built in this Drill, the drill bit
is suddenly halted when it strikes against a buried
reinforcing bar, and the Drill starts reverse operation as
a reaction.
Always continue a hole-drilling job, while strongly gripping
both the side handle and the handle.
2. How to clip or crush
By applying the drill bit tip to the chipping or crushing
position, operate the Drill by utilizing its own weight.
Forcible pressing or thrusting is unnecessary.
DRILLING AND DRIVING-IN OPERATIONS
FOR SELF-DRILLING ANCHORS
When self-drilling anchors (Fig. 4) are used, the anchors can
be driven in. In this case, use the optional accessories for
self-drilling anchor... such as the anchor adapter.
1. When an impact anchor adapter is used
(1) Attach the turning handle to the anchor adapter and
create a base hole by applying Drill impact to the hole
position while manually turning the handle. (Fig. 5)
In this case, the plug is not attached to the anchor.
(2) When a predetermined depth has been attained, pull out
the anchor tentatively. (Fig. 6)
(3) By employing a syringe, blow out the chips.