Milwaukee 1670-1 Manual Del Operador página 4

The operator should also prepare for a sudden
reaction by holding securely using the pipe handle
or bracing against a solid fi xed object.
To reduce the chance of bit binding
• Use sharp bits. Sharp bits are less likely to bind
when drilling.
• Use the proper bit for the job. There are many
types of bits designed for specifi c purposes.
• Use the proper speed for the size bit. Larger bits
should be run at the lower speed. Driving larger
bits at high speeds will increase the chance of the
bit binding and increase the chance of reaction.
• Avoid drilling warped, wet, knotty, and or pitchy
material if possible.
• Avoid drilling in material that you suspect contains
hidden nails or other things that may cause the bit
to bind.
The direction of reaction is always opposite of the
direction of bit rotation.
Reaction is even more likely to occur when enlarg-
ing already existing holes and at the point when the
bit breaks through the other side of the material.
Bracing for forward rotation
Fig. 4
B
A
Fig. 5
D
B
A
When drilling in forward, the bit will rotate in a
clockwise direction. If the bit binds in the hole, the
bit will come to a sudden stop and drill will suddenly
react in a counterclockwise direction.
Figures 4 and 5 show examples of a Hole Hawg
properly braced for forward rotation.
A. Forward (clockwise) rotation
B. Reaction
C. Brace drill with pipe handle here
D. Brace drill with motor housing here
If the bit binds, the pipe handle or the motor housing
braced against the stud will hold the drill in position.
Bracing for reverse rotation
Fig. 6
C
B
A
D
Fig. 7
B
When drilling in reverse, the bit will rotate in a
counterclockwise direction. If the bit binds in the
hole, the bit will come to a sudden stop and the
drill will suddenly react in a clockwise direction.
Figures 6 and 7 show examples of the Hole Hawg
C properly braced for reverse rotation.
A. Reverse (counterclockwise) rotation
B. Reaction
C. Brace drill with pipe handle here
D. Brace drill with motor housing here
If the bit binds, the pipe handle or the motor housing
braced against the stud will hold the drill in position.
Reversing
A reversing switch is located below the trigger switch
for removal of bits from holes. Permit the motor to
come to a complete stop before reversing. Reversing
the tool with the gears in motion may cause severe
damage. When removing selfeed bits from partially
drilled holes, a fl ick of the trigger switch will free the
threaded pilot screw. When the threads are loose, lift
the bit from the workpiece with the motor stopped.
Shifting Speeds
Cat. No. 1675-1 has a gear shift
lever on the right side of the
gear case.
The high setting (1200 RPM HI)
is the low torque setting and is
designed for driving Selfeed bits
®
1-3/8" in diameter and smaller.
The low setting (300 RPM LO)
is the high torque setting and is
designed for driving Selfeed bits
1-1/2" in diameter and larger.
Always turn off the switch and
shift while the tool is coasting to
a stop. Never shift the drill while it is moving at full
speed, when it is under load, or when it is stopped.
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WARNING
shock, check work area for hidden pipes and
wires before drilling or driving screws.
Drilling
Before drilling, clamp down the material securely.
A poorly secured piece of material may result in
personal injury or inaccurate drilling. When drilling
in light gauge metal or wood, use a wooden block
to back up the material to prevent damage to the
workpiece.
Mark the center of the hole to be drilled with a
center punch to give the bit a start and to prevent
it from "walking." Lubricate the drill bit with cutting
oil when drilling iron or steel. Use a coolant when
drilling nonferrous metals such as copper, brass
or aluminum.
To start a selfeed bit, run the threaded feed screw
into the work by fl icking the trigger switch, permit-
ting the bit to coast until the teeth contact the work
surface. Align the bit properly before proceeding.
This will reduce cocking and jamming when start-
ing. To reduce jamming on breakthrough, decrease
A
the drilling pressure when the feed screw point
breaks through the workpiece. Proceed with steady,
even pressure.
WARNING
always wear eye protection.
Chuck Removal
®
To remove the chuck from the drill:
1. Unplug tool.
2. Fully open the chuck jaws
3. Remove the left-handed thread screw from
inside the chuck by turning it clockwise.
4. Pull the chuck off of the spindle.
NOTE: If the chuck does not pull off of the
spindle easily, tap the side of the chuck with a
hammer to loosen it. If this doesn't work, contact
a MILWAUKEE service center.
ACCESSORIES
WARNING
Fig. 8
always unplug the tool before attaching or
removing accessories. Use only specifi cally
recommended accessories. Others may be
hazardous.
For a complete listing of accessories refer to your
MILWAUKEE Electric Tool catalog or go on-line
to www.milwaukeetool.com. To obtain a catalog,
contact your local distributor or a service center.
To reduce the risk of electric
WARNING
always unplug your tool before performing
any maintenance. Never disassemble the tool
or try to do any rewiring on the tool's electrical
system. Contact a MILWAUKEE service facility
for ALL repairs.
Maintaining Tools
Keep your tool in good repair by adopting a regular
maintenance program. Before use, examine the
general condition of your tool. Inspect guards,
switches, tool cord set and extension cord for
damage. Check for loose screws, misalignment,
binding of moving parts, improper mounting, bro-
ken parts and any other condition that may affect
its safe operation. If abnormal noise or vibration
occurs, turn the tool off immediately and have the
problem corrected before further use. Do not use a
damaged tool. Tag damaged tools "DO NOT USE"
until repaired (see "Repairs").
Under normal conditions, relubrication is not neces-
sary until the motor brushes need to be replaced.
After six months to one year, depending on use,
return your tool to the nearest MILWAUKEE service
facility for the following:
• Lubrication
To reduce the risk of injury,
• Brush inspection and replacement
• Mechanical inspection and cleaning (gears, spin-
dles, bearings, housing, etc.)
• Electrical inspection (switch, cord, armature, etc.)
• Testing to assure proper mechanical and electrical
operation
WARNING
electric shock and damage to the tool, never
immerse your tool in liquid or allow a liquid
to fl ow inside the tool.
Cleaning
Clean dust and debris from vents. Keep the tool
handles clean, dry and free of oil or grease. Use
only mild soap and a damp cloth to clean your
tool since certain cleaning agents and solvents
are harmful to plastics and other insulated parts.
Some of these include: gasoline, turpentine, lacquer
thinner, paint thinner, chlorinated cleaning solvents,
To reduce the risk of injury,
ammonia and household detergents containing
ammonia. Never use fl ammable or combustible
solvents around tools.
Repairs
If your tool is damaged, return the entire tool to the
nearest service center.
7
MAINTENANCE
To reduce the risk of injury,
To reduce the risk of injury,