Hafco Metalmaster HM-46B User manual

DRILL MILL
OPERATION MANUAL
Edition No : HM-046-1
Date of Issue : 10/2019
Model.
HM-46B
Order Code M138, M138D
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NOTE:
In order to see the type and model of the machine, please see the
specication plate. Usually found on the back of the machine. See
example (Fig.1)
Fig.1
DRILL MILL
MACHINE
HM-46B
MODEL NO.
SERIAL NO.
DATE OF MANF.
NOTE:
This manual is only for your reference. Owing to the continuous improvement of the HAFCO
METALMASTER machines, changes may be made at any time without obligation or notice.
Please ensure the local voltage is the same as listed on the specication plate before
operating this electric machine.
DistributeD by
www.machineryhouse.co.nz
MACHINE DETAILS
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C O N T E N T S:
1. GENERAL MACHINE INFORMATION
1.1 Specications.............................................................. 4
1.2 Standard Equipment................................................ 4
1.3 Identication............................................................... 5
2. IMPORTANT INFORMATION
2.1 General Metalworking Safe Practice................... 6
2.2 Mill/Drill Safety............................................................ 8
2.3 Lifting Instructions.................................................... 9
3. SETUP
3.1 Bolting The Mill Drill On The Stand...................... 10
3.2 Assembly....................................................................... 10
3.3 Leveling......................................................................... 10
3.4 Electrical Installation................................................ 11
3.5 Full Load Current Rating.......................................... 12
3.6 Basic Controls.............................................................. 12
3.7 Test Run......................................................................... 13
4. OPERATION
4.1 Operation Overview.................................................. 15
4.2 Downfeed Controls................................................... 16
4.3 HeadstocK Movement.............................................. 17
4.4 Table Movement........................................................ 18
4.5 Installing and Removing The Tooling................. 19
4.6 Digital Angle Block.................................................... 20
4.7 Changing The Speeds............................................... 20
5. OPERATION INSTRUCTION
5.1 Lubrication................................................................... 22
5.2 Changing The Gearbox Oil..................................... 22
5.3 Gib Adjustment.......................................................... 23
5.4 Troubleshooting......................................................... 24
Spare Parts............................................................................ 25
Risk Assessment Sheets................................................... 32
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1.1 SPECIFICATIONS
1.2 ACCESSORIES
Order Code M138 M138D
Model HM-46B HM-46B(DRO)
Capacity Steel (mm) 32 32
Table Size (mm) 730 x 210 730 x 210
X Axis Travel (mm) 485 485
Y Axis Travel (mm) 190 190
Z Axis Travel (mm) 425 425
Head Tilt Left-Right 90° 90°
Throat Depth Max (mm) 265 265
Spindle To Table (mm) 485 485
Spindle Travel (mm) 120 120
Spindle Diameter (mm) 75 75
Spindle Taper 3mt 3mt
Spindle Speeds 6(95 - 1650) 6(95 - 1650)
Motor (kW/HP) 1.5 / 2 1.5 / 2
Voltage / Amperage 240 / 10 140 . 10
Dimensions (L x W x H) (cm) 84 x 77 x115 84 x 77 x115
Weight (kg) 293 293
Digital Readout - 3 Axis Counter
X,Y Scales only
X. Axis Power Feed Optional Optional
Draw Bar Size 1 o 1/2 x 12 TPI
1o M12 x 1.75mm
1/2 x 12 TPI
1o M12 x 1.75mm
1. Bevel angle box
2.16mm Drill Chuck and Arbour
3. Mt3 x MT2 Drill sleeve
4. Mt3 x 45mm Face Mill
5. 3 x TPMN16 inserts
6. Instruction Manual
7. Hex keys and Spanner
8. Drawbars (2)
9. Toolbox and Oiler
10. Drill Drifts
OPTIONAL ACCESSORIES
Mill Drill Stand (Order Code M135A)
X Axis Power Feed (Order Code M230)
240 -110volt Transformer (M240)
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1.3 IDENTIFICATIONS
AMotor HTable Travel Stop OSpindle Guard
BZ Axis Lock IY Axis Table Lock PSpindle Lock
CDigital Readout JX Axis Table Lock QFine Down-feed Handle
DDown-feed Selector Knob KY Axis Handle RDepth Stop Scale
ECourse Down-feed Handle LTable Travel Stop SControl Panel
FDovetail Column MVertical Handle TSpeed Selectors
GX Axis Handles NSpindle UDrawbar Cover
A
B
C
D
E
F
G
IH
K
J
L
M
N
O
P
Q
U
G
R
S
T
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DO NOT use this machine unless you have read this manual or have been instructed in the use
of this machine in its safe use and operation
This manual provides safety instructions on the proper setup, operation, maintenance, and
service of this machine. Save this manual, refer to it often, and use it to instruct other operators.
Failure to read, understand and follow the instructions in this manual may result in re or
serious personal injury—including amputation, electrocution, or death.
The owner of this machine is solely responsible for its safe use. This responsibility includes, but
is not limited to proper installation in a safe environment, personnel training and authorization
to use, proper inspection and maintenance, manual availability and comprehension, of the
application of the safety devices, integrity, and the use of personal protective equipment.
The manufacturer will not be held liable for injury or property damage from negligence,
improper training, machine modications or misuse.
WARNING
2.1 GENERAL METALWORKING SAFE PRACTICES
Always wear safety glasses or goggles.
Wear appropriate safety footwear.
Wear respiratory protection where required.
Gloves should never be worn while operating the machine, and only worn when
handling the workpiece.
Wear hearing protection in areas > 85 dBA. If you have trouble hearing someone speak
from one metre (three feet) away, the noise level from the machine may be hazardous.
DISCONNECTION THE MACHINE FROM POWER when making adjustments or servicing.
Check and adjust all safety devices before each job.
Ensure that guards are in position and in good working condition before operating.
Ensure that all stationary equipment is anchored securely to the oor.
Ensure all machines have a start/stop button within easy reach of the operator.
Each machine should have only one operator at a time. However, everyone should know
how to stop the machine in an emergency.
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Ensure that keys and adjusting wrenches have been removed from the machine before
turning on the power. Appropriate storage for tooling should be provided.
Ensure that all cutting tools and blades are clean and sharp. They should be able to cut freely
without being forced.
Stop the machine before measuring, cleaning or making any adjustments.
Wait until the machine has stopped running to clear cuttings with a vacuum, brush or rake.
Keep hands away from the cutting head and all moving parts.
Avoid awkward operations and hand positions. A sudden slip could cause the hand to move
into the cutting tool or blade.
Return all portable tooling to their proper storage place after use.
Clean all tools after use.
Keep work area clean. Floors should be level and have a non-slip surface.
Use good lighting so that the work piece, cutting blades, and machine controls can be seen
clearly. Position any shade lighting sources so that they do not cause any glare or reections.
Ensure there is enough room around the machine to do the job safely.
Obtain rst aid immediately for all injuries.
Understand that the health and re hazards can vary from material to material. Make sure all
appropriate precautions are taken.
Clean machines and the surrounding area when the operation is nished.
Use proper lock out procedures when servicing or cleaning the machines or power tools.
DO NOT
×Do not distract an operator. Horseplay can lead to injuries and should be strictly prohibited.
×Do not wear loose clothing, gloves, necktie’s, rings, bracelets or other jewellery that can be
come entangled in moving parts. Conne long hair.
×Do not handle cuttings by hand because they are very sharp. Do not free a stalled cutter
without turning the power o rst. Do not clean hands with cutting uids.
×Do not use rags or wear gloves near moving parts of machines.
×Do not use compressed air to blow debris from machines or to clean dirt from clothes.
×Do not force the machine. It will do the job safer and better at the rate for which it was
designed.
2.1 GENERAL METALWORKING SAFE PRACTICE Cont.
BEFORE OPERATING ANY MACHINE, TAKE TIME TO READ
AND UNDERSTAND ALL SAFETY SIGNS AND SYMBOLS.
IF NOT UNDERSTOOD SEEK EXPLANATION FROM YOUR
SUPERVISOR.
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2.2 MILL DRILL SAFETY
DO NOT use this machine unless you have been instructed in its safe
use and operation and have read and understood this manual
PRE-OPERATIONAL SAFETY CHECKS
Locate and ensure you are familiar with all machine operations and controls.
Ensure all guards are tted, secure and functional. Do not operate if guards are missing or
faulty.
Check workspaces and walkways to ensure no slip/trip hazards are present
Ensure cutter is in good condition and securely mounted.
Check coolant delivery system (if used) to allow for sucient ow of coolant.
OPERATIONAL SAFETY CHECKS
Keep clear of moving machine parts.
Follow correct clamping procedures. Keep overhangs as small as possible and check work
piece is secure.
Set the correct speed to suit the cutter diameter, the depth of cut and the material.
Feed the workpiece against the milling cutter.
ENDING OPERATIONS AND CLEANING UP
Switch o the machine when work completed.
Remove milling cutters and store them safely.
Before making adjustments and measurements or cleaning swarf accumulations, switch o
and bring the machine to a complete standstill.
Leave the machine and work area in a safe, clean and tidy state.
POTENTIAL HAZARDS AND INJURIES
rSharp cutters.
rHair/clothing getting caught in moving machine parts.
rEye injuries.
rMetal splinters and burrs.
rFlying debris.
DON’T
ODo not use faulty equipment. Immediately report suspect machinery.
ONever leave the machine running unattended.
ODo not leave equipment on top of the machine.
Safety glasses must be
worn at all times in work
areas
Sturdy footwear must
be worn at all times in
work areas
Long and loose hair
must be contained
Close tting/protective
clothing must be worn
Gloves must not be
worn
Rings and jewelery
must not be worn.
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2.3 LIFTING INSTRUCTIONS
On the day that the machine arrives, make sure that a crane with sucient capacity is available
to unload the machine from the vehicle. Ensure access to the chosen site is clear and that doors
and ceilings are suciently high and wide enough to receive the machine.
To handle the machine, the slings should be positioned so the machine is level when lifted.
When using slings please take note of the sling angle and the loads that apply
When the slings are at a 45° angle then each sling is
carrying the equivalent of 50% of load weight. (Fig.2.1).
When the slings are at a 90° angle then each sling will
have a weight equal to 75% of the load on each sling.
(Fig 2.2)
Note! The manufacturer recommends not to exceed 90°
angle
Fig 2.2
Fig 2.1.
When lifting the machine only certied lifting slings
should be used.
Ensure that when lifting, the machine does not tip over.
Check that the lifting slings do not interfere with the
hydraulic pipes or electrical conduits.
Failure to follow these instructions could cause damage
to the machine.
1. Move the shipping crate next to the workbench or
optional stand, then unbolt machine from pallet.
2. Move table as close to column as possible, and raise
headstock to its highest position. This will help
balance machine when moving.
3. Tighten Z-axis locks to avoid sudden shifts when
lifting.
4. Place a lifting strap under headstock, as shown in
Fig. 2.3, connect strap ends to a forklift or hook,
then lift and place machine on the workbench or on
the optional stand.
LIFTING POINTS
Fig. 2.3
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If the machine is mounted on
the optional stand, it should be
bolted to the oor or concrete
slab (Fig. 2.5)
Masonry anchors with bolts are
the best way to anchor machin-
ery, because the anchors sit ush
with the oor surface, making it
easy to unbolt and move the ma-
chine later, if needed. (Fig. 2.4)
Fig. 2.5
Fig. 2.4
MOUNTING METHODS
3. SETUP
3.1 BOLTING THE MILL DRILL ON THE STAND
Before you place the stand on the oor, it is recommended that
you consider the following options.
When bolting down the stand, consider using Hafco M0015 ma-
chine mounts to make it easy for leveling and eliminate vibra-
tion.
Bolting the stand to the oor prevents tipping or shifting and
reduces vibration that may occur during operation, resulting in a
machine that runs slightly quieter and feels more solid.
If the machine is to be installed in a commercial or workplace
setting, or if it is permanently connected (hardwired) to the pow-
er supply, then the stand should be anchored to the oor. M0015
Order Code M0015
Whether you mount your machine to the cabinet stand or to an existing workbench, it must
be leveled. If you mounted your machine to an existing workbench, use a precision level and
metal shims as needed under the machine base to make sure the machine table is level from
side-to-side and from front-to-back. If you mounted your machine to the cabinet, use a preci-
sion level on the table and adjust the machine mounts or place shims under the corners of the
cabinet to make sure the machine table is level from side-to-side and from front-to-back.
(Fig. 3.1)
3.3 LEVELING
Except for the hand-wheel handles, the mill/drill was fully assembled at the factory. Use a slot-
ted screwdriver to attach the hand-wheel handles, to the “X”and “Y” axis handles.
3.2 ASSEMBLY
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Place the machine near an existing power source. Make sure all power cords are protected from
trac, material handling, moisture, chemicals, or other hazards. Make sure there is access to a
means of disconnecting the power source. The electrical circuit must meet the requirements for
240V. If the machine is to be hard wired, to minimize the risk of electrocution, re, or equipment
damage, the installation and electrical wiring must be done by a qualied electrician.
NOTE : The use of an extension cord is not recommended as it may decrease the life of electrical
components on your machine.
3.4 ELECTRICAL INSTALLATION
ELECTRICAL REQUIREMENTS
Nominal Voltage.........................................240V
Cycle............................................................50 Hz
Phase...............................................Single Phase
Power Supply Circuit............................10 Amps
Full Load Current.................................7.1 Amps
(Full load current rating is also on the specication plate on the motor.)
Fig 3.1
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The full-load current rating is the amperage a machine draws when running at 100% of the out-
put power. Where machines have more than one motor, the full load current is the
amperage drawn by the largest motor or a total of all the motors and electrical devices that
might operate at one time during normal operations.
Full-Load Current Rating for these machines at 240V is 7.1 Amps
It should be noted that the full-load current is not the maximum amount of amps that the
machine will draw. If the machine is overloaded, it will draw additional amps beyond the
full-load rating and if the machine is overloaded for a long period of time, damage, overheating,
or re may be caused to the motor and circuitry.
This is especially true if connected to an undersized circuit or a long extension lead. To reduce
the risk of these hazards, avoid overloading the machine during operation and make
sure it is connected to a power supply circuit that meets the requirements.
3.5 FULLLOAD CURRENT RATING
3.6 BASIC CONTROLS
The descriptions below can be used to gain
a basic understanding of the control panel.
Knowing this information is required to safely
complete the Test Run.
FORWARD Button: Starts clockwise spindle
rotation (as viewed from above). The spindle
must be completely stopped before this button is
pushed.
REVERSE Button: Starts counterclockwise spin-
dle rotation (as viewed from above). The spindle
must be completely stopped before this button is
pushed.
Fig.3.2
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POWER Lamp: Illuminates when the machine is con-
nected to power.
STOP Button: Stops spindle rotation.
EMERGENCY STOP Button: Cuts power to the spindle
motor and remains depressed until reset. Twist clockwise
until it pops out to reset. (Fig.3.3)
HIGH/LOW RANGE LEVER: Selects either high or low
spindle speed range. (A in Fig3.4)
SPINDLE SPEED LEVER: Selects one of three spindle
speeds in the selected speed range. (B in Fig.3.4)
Fig.3.3
A
B
Fig.3.4
NOTE: The headstock oil reservoir must have the proper amount of oil in it before the mill/drill
can be operated for the rst time. Damage caused by running the mill/drill without oil in the
reservoir will not be covered under warranty.
Test run the machine to ensure it is properly connected to power and safety components are
functioning correctly. If you nd an unusual problem during the test run, immediately stop the
machine, disconnect it from power, and x the problem BEFORE operating the machine again.
Consult The Troubleshooting table in the maintenance section of this manual for possible
solution.
The Test Run consists of verifying the following:
1) The motor powers up and runs correctly, and
2) the safety disabling mechanism on the emergency stop button works correctly.
To test run the mill/drill:
1. Clear all setup tools away from machine.
2. Connect machine to power supply. Power lamp should light.
3.7 TEST RUN
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3. Press EMERGENCY STOP button (E in Fig3.5)
This will help prevent unexpected startup
when machine is connected to power
4. Shift high/low range lever (F) right to“L” and
spindle speed lever (G) left to “2”. This selects a
spindle speed of 170 RPM (refer to spindle
speed chart on headstock).
Note: You may need to rotate spindle back and
forth by hand while putting pressure on the shift
lever to allow gears to mesh.
AB
C
DE
F
G
Fig.3.5
5. Twist EMERGENCY STOP button (E in Fig 3.5) clockwise until it pops out - this resets the
button and enables the power to control panel and motor.
6. Press the SPINDLE FORWARD button (A in Fig 3.5). Spindle should rotate clockwise (as
viewed from top) and machine should run smoothly with little to no vibration or rubbing
noises.
7. Press STOP button (D in Fig.3.5) and wait for spindle to completely stop.
8. Press SPINDLE REVERSE button.(B in Fig.3.5) Spindle should rotate counterclockwise (as
viewed from top).
10. Press EMERGENCY STOP button (E in Fig.3.5) and wait for spindle to completely stop.
11. Without resetting EMERGENCY STOP button, press SPINDLE FORWARD button. Machine
should not start.
NOTE: If the machine does start (with EMERGENCY STOP button pushed in), immediately dis-
connect the power to machine. EMERGENCY STOP safety feature is not working correctly.
This safety feature must work properly before proceeding with regular operations.
Refer to Troubleshooting on Page 24 for possible solution.
12. Twist EMERGENCY STOP button clockwise to reset it.
Once everything is working as it should then the Test Run is complete and the machine can be
used for normal operation.
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4. OPERATION.
The purpose of this overview is to provide the novice machine operator with a basic under-
standing of how the machine is used during operation, so the machine controls/components
discussed later in this manual are easier to understand.
Due to the generic nature of this overview, it is not intended to be an instructional guide. To
learn more about specic operations, read this entire manual and seek additional training from
experienced machine operators, and do additional research outside of this manual by reading
“how-to” books, trade magazines, or visiting websites.
When undergoing a typical operation, the operator needs to do the following:
1. Examines the workpiece to make sure it is suitable for the machining operation.
2. Check the machine to ensure that it is safe to use and put on protective clothing and
safety equipment.
3. Place the workpiece on the table and securely clamp it to the table.
4. Select the correct cutting tool for the job and with the machine disconnected from power,
install the cutting tool using the correct holder.
5. Lower the headstock so the cutting tool is just above the workpiece.
6. Select the correct spindle speed for the cutter and the workpiece.
7. Connect the machine to the power supply and turn it ON.
8. Uses the down feed, or table controls to perform the cutting operation.
9. Turn the machine OFF and wait for the spindle to completely stop before removing the
workpiece, changing tooling, or changing spindle speeds.
4.1 OPERATION OVERVIEW
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4.2 DOWN FEED CONTROLS
These machines are equipped with a course down-feed control mainly used for drilling or quick
adjustment and a ne down-feed control used mainly when milling or where controlled down-
feed is required. (Fig.4.1)
A. Depth Stop and Scale
B. Quill Lock Lever
C. Depth Stop Adjustment Knob
D. Fine Down-feed Hand-wheel
E. Down-feed Selector Knob
F. Coarse Down-feed Handle
A
B
C
D
E
F
Fig.4.1
To Use The Coarse Down-feed
1. Loosen quill lock lever.
2. Loosen down-feed selector knob to engage
coarse down-feed handles.
3. Position depth stop with adjustment knob.
4. Use coarse down-feed handles to raise and
lower the spindle.
To Use The Fine Down-feed
1. Loosen quill lock lever.
2. Tighten down-feed selector knob to engage
ne down-feed hand wheel.
3. Position depth stop with adjustment knob.
4. Rotate ne down-feed hand wheel to raise and
lower spindle.
Depth Stop
The depth stop limits the downward
movement of the cutting tool. With the
use of the depth stop adjustment knob
(see “C” in Fig.4.2), it can be positioned
anywhere within 0–125mm. This is
useful when performing the same
operation multiple times.
C
Fig.4.2
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4.3 HEADSTOCK MOVEMENT
The headstock is designed to move up and down along the Z axis and tilt 90 degrees side to
side.
To Raise or Lower the Headstock
1. DISCONNECT THE MACHINE FROM POWER!
2. Loosen both Z-axis lock levers shown in
Fig.4.3
Fig.4.3
Lock
Levers
Fig.4.4
To Tilt The Headstock
1. DISCONNECT THE MACHINE FROM POWER!
2. Loosen the three locking hex nuts a 1/4 to
1/2 a turn. There is one on either side of the
head (Fig.4.5) and one under the bottom of
the head (see Fig.4.6).
NOTE: The 3 nuts must only be loosened a
quarter to a half a turn maximum to avoid the
head disengaging from the tilting mechanism
and the head dropping under its own weight.
3. Using the scale shown as a guide, swivel
the headstock and re-tighten the three hex
nuts to secure it
3. Use Z-axis crank shown in Fig.4.4 to adjust
the headstock height.
4. Tighten Z-axis lock levers to secure the head
Fig.4.5
Hex. Nut Tilt Scale
Fig.4.6
Hex. Nut
The head is heavy and will require support when tilting.
Arrange for some help to support the head when tilting.
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4.4 TABLE MOVEMENT
The table has travel in two directions called “X” and“Y” axis
XAxis is the Longitudinal Travel
YAxis is the Cross Travel
GRADUATION DIALS
The hand-wheels have graduated dials that are used to determine table movement in 0.05mm
increments, with one full revolution equaling 0.30mm
A thumb screw is provides so the graduated dial can be adjusted to a relative starting point.
(Fig.4.8 & 9)
Fig.4.8
Cross Dial
Fig.4.9
longituDinal Dial
Before moving the table make sure that the
table lock for that movement has been unlocked.
Always lock the table if not using the movement
in that direction. (Fig.4.10)
NOTE: When tightened, table locks provide table
rigidity in that path of table travel for increased
precision.
Left to Right Movement“X” Axis
Longitudinal Travel
In and Out Movement
“Y” Axis
Cross Travel
Fig. 4.7
Fig.4.10
longituDinal loCks
Cross loCk
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4.5 INSTALLING & REMOVING THE TOOLING
The machine is tted with a 3MT spindle to hold the tooling. While the taper will hold drills
where pressure is applied to the end of the drill, with milling cutters pressure is applied to the
side of the cutter , therefore the cutter arbour needs to be held also with a drawbar.
Fig.4.11
To install the tooling:
1. DISCONNECT THE MACHINE FROM POWER!
2. Remove the drawbar cap, so the drawbar is
exposed. (Fig.4.11)
3. Clean the mating surfaces then insert the tooling
in the spindle with force so that the taper holds
the arbour..
4. Working from the top, thread the drawbar by
hand into the tooling until it is snug, then use a
spanner to tighten it.
5. Replace the drawbar cap
To remove the tooling:
1. DISCONNECT THE MACHINE FROM POWER!
2. Remove the drawbar cap.
3. Un-thread the drawbar from tooling one full
rotation.
NOTE: Do not fully un-thread the tooling from the
drawbar, or the drawbar and tool threads could be
damaged in the next step.
4. Tap the top of drawbar with hammer to unseat
the taper.
5. Hold onto the tooling with one hand and fully
un-thread the drawbar.
NOTE: Height of drawbar inside spindle can be changed by rotating adjustment nut. Do not
overtighten the drawbar. Overtightening makes the tool removal dicult and may cause
damage to the arbor and threads.
Fig.4.12
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Fig.4.13
4.6 DIGITAL ANGLE GAUGE
The digital angle gauge is easily installed against
the machined surfaces on the mill head, and held in
place by the magnetic surfaces on the edges of the
angle gauge . The digital angle gauge allows for easy
angle setting of the head. (Fig.4.13)
Features and Functions
1. Automatic LCD Backlight
2. Can measure in absolute or relative measurement
3. The angle will be displayed in degrees
4. The working range of the angle measurement is 4
x 90°
5. Automatic digit inversion for overhead
measurements
6. Magnetic base.
Battery Installation (Battery 1 x AAA):
1. Make sure the digital angle gauge is switched
OFF
2. Remove the battery compartment cover.
3. Install the new battery, following the polarity
indicator.
4. Replace the battery cover.
NOTE: Always remove the battery before storing the
digital angle gauge.
Operation
The operation of the digital angle gauge is very simple. Press the ON/OFF button to switch on
the gauge and press the “ZERO” button at anytime to zero the gauge. (Fig.4.14)
To set true Zero nd a level surface and place the angle gauge on the surface, switch on the dig-
ital angle gauge and press zero. It will remember zero until the “ZERO” button is pressed again.
Fig.4.14
4.7 CHANGING THE SPEEDS
Selecting the correct spindle speed is important for safe and satisfactory results, as well as max-
imizing tool life.
To set the spindle speed for your operation, you will need to:
1. Determine the best spindle speed for the cutting task,
2. Congure the spindle speed levers to produce the required spindle speed.
Determining Spindle Speed
Many variables aect the optimum spindle speed to use for any given operation, but the two
most important are the recommended cutting speed for the workpiece material and the diam-
eter of the cutting tool, as noted in the formula. (Fig.4.15)
07/11/2019
Instructions Manual for HM-46B (M138D)
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