Cutting Procedure; Lubrication - Milwaukee 4253-1 Manuel De L'utilisateur

3. Lubricate the tap and hole and lower the tap onto
the work surface. Turn the drill speed control to
the slowest setting and push the "Drill Fwd" button
("Drill Rev" for the left hand threads) to start the
drill motor. Adjust the speed control knob so the
tap turns slowly and smoothly into the hole.
4. When using smaller taps, reverse the motor as
soon as the tap breaks through the hole. With
large taps, reverse the motor as soon as the
first full thread is exposed, the motor does not
have to be stopped before changing directions.
5. Reverse the motor to slowly withdraw the tap from
the hole. Maintain light pressure on the handle to
compensate for the weight of the drill motor on
the tap. As soon as the tap comes out of the hole,
raise the motor and tap clear of the workpiece.
NOTE: Only the low speed shift setting on the
2-speed drill is recommended for tapping.
Using Twist Drills
When preparing to drill, align the bit with the area
to be drilled. When proper alignment is established,
energize the magnet and start the drill motor. A pilot
hole is recommended for drilling holes larger than
1/2" in diameter.
When drilling, apply only enough force to produce
a curled chip. Applying too little force will result
in small broken chips and increased drilling time.
Applying too much force will cause overheating of
the bit resulting in short bit life. Overheating of the
bit can be noticed when drill bit and chips turn brown
or blue. Excessive force can cause the drill to slow
down to a point where drilling time will increase. The
use of cutting lubricants will reduce drilling heat and
increase drill bit life.
Using MILWAUKEE STEEL HAWG™ CUTTERS
MILWAUKEE STEEL HAWG™ CUTTERS cut an
annular ring around the edge of the hole leaving
the center "slug" intact. This greatly reduces the
time, power and drilling force required. The carbide
teeth also leave a finished hole that does not require
reaming. These cutters are designed for use with an
electromagnetic or industrial drill press.
• Do not use these cutters in hand held tools.
• Center pin is spring loaded. Provide protection from
ejected slug for people and property below drilling area.
• Do not remove cutter from arbor unless slug is
removed. Slug may be ejected unexpectedly.
• Keep pump bottle and hose away from moving parts.
• Use pliers to remove chips from bit and arbor only
after motor has stopped.
• Avoid contact with the carbide tips.
• Periodically inspect the carbide tips for loose
or cracked tips. DO NOT USE carbide tips with
cracked or loose tips.
These bits require the use of
WARNING
HAWG WASH™ cutting fluid for
extended life. Do not use cutting fluid in an
overhead or any other position that allows cut-
ting fluid to enter motor or switch enclosure.
Wet connections are shock haz-
ards. Prevent cutting fluid from
traveling along cord and contact-
ing the outlet, extension cord con-
nections or tool plug. Each time
tool is plugged in, elevate exten-
sion cord or gang box connec-
tions and arrange a drip loop. If
plug or connections get wet, turn
power off to outlet before unplugging tool.
Always use well maintained equip-
WARNING
ment with minimum spindle run out.
Attaching MILWAUKEE STEEL
HAWG™ CUTTERS
See the information supplied with your arbor.

Cutting Procedure

1. Refer to the chart supplied with the arbor to
determine the proper drill rotating speed for the
type of material and cutter diameter. When using
this chart, use the upper end of the range for softer
materials and the lower end for harder materials. Set
the drill rotating speed to the recommended speed.
2. Position the workpiece or tool so that the center
pin is directly over the desired drilling location.
3. The use of HAWG WASH™ cutting fluid is required
for long life of these cutters (see "Lubrication").
Attach the hose to the oil fitting on the side of the
arbor and to your lubricant reservoir.
4. Swing the arbor arm in the direction of the spindle
rotation until it comes in contact with the side of
the drill motor or drill press.
5. Start the drill motor.
6. Cutting fluid will not flow freely until the cen-
ter pin is depressed slightly. Move the cutter
towards the material until the center pin is
depressed slightly and begin pumping cutting fluid.
7. When feeding the cutter into the material, use only
enough pressure to produce efficient cutting with-
out overloading the tool or cutter. Because STEEL
HAWG™ CUTTERS have multiple cutting edges,
they require considerably less downward pres-
sure than ordinary twist drills. STEEL HAWG™
CUTTERS work best at their recommended
drill rotating speed and with moderate pressure.
Excessive pressure will only slow the operation
and damage the cutter. Use less feed pressure
when slotting or notching because there is less
support for the cutting edges in these situations.
8. Avoid raising the cutter before the cut is complete.
Keep constant pressure throughout the entire
operation to prevent chips and cuttings from falling
under the cutting edges. A loose cutting under the
cutter can make cutting difficult or impossible.
9. When the cut is completed, stop pumping cutting
fluid, and withdraw the cutter while the drill motor
is still rotating.
10. Turn the drill motor off.
11. When the drill has stopped, use a pliers to remove
cuttings from the bit and arbor. Use care to avoid
damaging the carbide teeth.
12. The center pin is spring loaded and should eject
the slug when the cut is completed. Provide protec-
tion from falling slugs for people or property below.

Lubrication

A continuous flow of lubricant is required with these
cutters. MILWAUKEE HAWG WASH™ (cutting fluid)
is recommended for most applications. It is available
in a case of twelve 16 oz. bottles of concentrate,
Cat. No. 49-32-0081, which will make 1 gal. of
lubricant per bottle. Failure to use the lubricant
properly will cause cutter damage. When cutting with
STEEL HAWG™ CUTTERS, supply a continuous
flow of cutting fluid to the arbor. When notching or
slotting, the lubricant system may not supply enough
lubricant to the cutting area. In these situations, the
cutting fluid should be applied directly to the area
being cut. Alternative lubricants introduce different
cooling and lubricating reactions. The operator is
responsible for the application of lubricants other
than HAWG WASH™ cutting fluid.
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