Operation - Stanley SK47 User Manual

The recommended hose size is .500 inch/12 mm ID up
to 50 ft/15 m long and .625 inch/16 mm ID minimum up
to 100 ft/30 m.
PRE-OPERATION PROCEDURES
CHECK POWER SOURCE
1. Using a calibrated flow meter and pressure gauge,
check that the hydraulic power source develops a
flow of 7–9 GPM/26–34 LPM at 1500–2000 psi/105–
140 bar.
2. Make certain the hydraulic power source is equipped
with a relief valve set to open at 2100–2250 psi/145–
155 bar maximum.
INSTALL DRILL STEEL & ROCK BIT
Use standard 4-1/4 inch shank × 7/8 inch hex drill steels.
Drill steels are available in a variety of lengths. Start
with a short length so that the tool may be operated at a
normal standing position. The tool handles should never
exceed chest height during operation.
1. Thread a rock bit onto the drill steel.
2. Rotate the latch out and up.
3. Slide the drill steel into the tool.
4. Rotate the latch down being careful not to pinch your
fingers. When correctly installed, the collar on the
drill steel should be above the bottom of the latch.
CONNECT HOSES
1. Wipe all hose couplers with a clean, lint-free cloth
before making connections.
2. Connect the hoses from the hydraulic power source
to the tool fittings or quick disconnects. It is a good
practice to connect return hoses first and disconnect
them last to minimize or avoid trapped pressure
within the tool.
3. Observe flow indicators stamped on hose couplers
to ensure that fluid flow is in the proper direction. The
female coupler on the tool hose is the inlet coupler.
4. Move the hydraulic circuit control valve to the ON
position to operate the tool.
Note: If uncoupled hoses are left in the sun, pressure
increase within the hoses may make them difficult
to connect. Connect the free ends of the hoses
together.
5. Connect the hose from the air supply to the hose on
the tool.
10 ► SK47 User Manual

OPERATION

The air supply must be minimum 30 cfm at 120 psi.
Supplying less than these specifications may result
in inadequate extraction of rock cuttings; cause
cuttings to migrate up the drill steel and into the tool
and result in tool damage; diminish drilling time; and
cause premature wear of the drill bit.
OPERATION PROCEDURES
1. Observe all safety precautions.
2. Install the appropriate tool bit for the job.
3. Start the hydraulic supply and turn the circuit control
valve to the ON position.
4. Open the air valve on the tool just enough to permit
a small amount of air flow from the tool bit.
Note: Air flow must be continuous during drilling
to avoid clogging of the air passages and/or back-
flushing of waste products into the drill.
5. Place the bit firmly on the surface to be drilled. Do
not operate the sinker drill without the drill steel
in contact with the work surface. Adequate down
pressure is very important.
6. Several methods can be used to reduce the
tendency for the drill to "walk" on the surface to be
drilled before the hole is initiated.
If the trigger is partially depressed, the piston will
cycle at low speed, without tool bit rotation, allowing
a start hole to be made. This will keep the drill in
place when full power is applied.
Rotating the motor control lever straight up will shut
off all rotation allowing the operator to establish a
starting hole prior to full application.
7. The rotation control lever controls rotation speed
from 0 to approximately 300 rpm. Normal drilling is
best accomplished with the lever halfway between
fully on and straight up off position.
Note: Normal drill rotation is counterclockwise
when viewed from the top of the tool. The clockwise
rotation position of the motor control lever has been
blocked with a roll pin stop to avoid unscrewing a
drill bit at the bottom of the drilled hole.
8. Ensure the rock bit is rotating at a moderate speed
(not too fast, not too slow). When starting the hole,
it is best to start at a slow impact and rotation speed
until the rock bit has carved out a depression in the
material being drilled. If the rock bit is not rotating