RF 812N User manual

8” METAL CUTTING BAND SAW
INSTRUCTION MANUAL
812-N-G-110613-R5

WARNING
!!
Some dust created by power sanding, sawing,
grinding, drilling, and other construction activities
contains chemicals known to the State of California to
causecancer,birth defects or other reprodrctive harm.
Someexamples of these chemical are:
‧Lead from lead-based paints.
‧Crystalline silica from bricks, cement and other
masonry products.
‧Arsenic and chromium from chemically-treated
lumber.
Yourriskfrom these exposures varies, depending on
how often you do this type of work. To reduce your
exposure to these chemicals: Work in a well ventilated
area,andwordwith approved safety equipment, such
asthosedust masks that are specially designed to
filter out microscopic particles.

TableOfContents PageNo
1 Warning ….………………………………………………………………..… 2
2 Safety rules for all tools ..………………………………………………… 2
3 Specification ……………………………………………………………… 3
4 Transportation of machine ……………………………………………… 4
5 Installation ……………………………………………………………………. 4
6 Minimum Room Space For Machine Operation ……………………….. 5
7 Make proper tooth selection ………………………………………………..5
8 BI-Metal speeds and feeds .……………………………………………… 6
9 Assembly …………………………………………………………………….6
10 Operation ……………………………………………………………………7
11 Blade guide bearing adjustment …..…………………………………….9
12 Blade track adjustment .…………………………………………………..10
13 Maintenance …………………..………………………………………………11
14 Lubrication …………………………………………………………………….11
15 Trouble Shooting ……………………………………………………………..11
16 Circuit Diagram ……………………….………………………………………13
18 Parts Breakdowns & Parts Lists (812N/812G)……………………………15
CAUTION
Install saw blade and blade guard
before use. Set proper blade tension
to prevent any danger caused by
damaged saw blade or work piece.
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1. WARNING: FAILURE TO FOLLOW THESE RULES
MAY RESULT IN SERIOUS PERSONAL INJURY
As with all machinery there are certain hazards involved with operation and use of the machine. Using the machine with
respect and caution will considerably lessen the possibility of personal injury. However, if normal safety precautions are
overlooked or ignored, personal injury to the operator may result.
This machine was designed for certain applications only. We strongly recommends that this machine NOT be modified
and/or used for any application other than for which it was designed. If you have any questions relative to its application
DO NOT use the machine
until you contact with us and we have advised you
Your machine might not come with a power socket or plug. Before using this machine, please
Do ask your local dealer to install the socket or plug on the power cable end
2. SAFETY RULES FOR ALL TOOLS
A. USER:
(1). WEAR PROPER APPAREL. No loose clothing,
gloves, rings, bracelets, or other jewelry to get caught in
moving parts.
Non-slip foot wear is recommended. Wear protective hair
covering to contain long hair.
(2). ALWAYS WEAR EYE PROTECTION. Refer to
ANSLZ87.1 standard for appropriate recommendations.
Also use face or dust mask if cutting operation is dusty.
(3). DON’T OVERREACH. Keep proper footing and
balance at all times.
(4). NEVER STAND ON TOOL. Serious injury could
occur if the tool is tipped or if the cutting tool is
accidentally contacted.
(5). NEVER LEAVE TOOL RUNNING UNATTENDED.
TURN POWER OFF. Don’t leave tool until it comes to a
complete stop.
(6). DRUGS, ALCOHOL, MEDICATION. Do not operate
tool while under the influence of drug, alcohol or any
medication.
(7). MAKE SURE TOOL IS DISCONNECTED FROM
POWER SUPPLY. While motor is being mounted,
connected or reconnected.
(8). ALWAYS keep hands and fingers away from the
blade.
(9). STOP the machine before removing chips.
(10). SHUT- OFF power and clean the BAND SAW and
work area before leaving the machine.
B. USE OF MACHINE:
(1). REMOVE ADJUSTING KEYS AND WRENCHES.
Form habit of checking to see that keys and adjusting
wrenches are removed from tool before turning it “on”.
(2). DON’T FORCE TOOL. It will do the job better and be
safer at the rate for which it was designed.
(3). USE RIGHT TOOL. Don’t force tool or attachment to
do a job for which it was not designed.
(4). SECURE WORK. Use clamps or a vise to hold work
when practical. It’s safer than using your hand frees both
hands to operate tool.
(5). MAINTAIN TOOLS IN TOP CONDITION. Keep tools
sharp and clean for best and safest performance. Follow
instructions for lubricating and changing accessories.
(6). USE RECOMMENDED ACCESSORIES. Consult the
owner’s manual for recommended accessories. The use
of improper accessories may cause hazards.
(7). AVOID ACCIDENTAL STARTING. Make sure switch
is in “OFF” position before plugging in power cord.
(8). DIRECTIONOF FEED. Feed work into a blade or
cutter against the direction of rotation of the blade or
cutter only.
(9). ADJUST AND POSITION the blade guide arm
before starting the cut.
(10). KEEP BLADE GUIDE ARM TIGHT, A loose blade
guide arm will affect sawing accuracy .
(11). MAKE SURE blade speed is set correctly for
material being cut.
(12). CHECK for proper blade size and type.
(13). STOP the machine before putting material in the
vise.
(14). ALWAYS have stock firmly clamped in vise before
starting cut.
(15). GROUNDALL TOOLS. If tool is equipped with
three-prong plug, it should be plugged into a three-hole
electrical receptacle. If an adapter is used to
accommodate atwoprong receptacle, the adapter lug
must be attached to a known ground. Never removed the
third prong.
C. ADJUSTMENT :
MAKE all adjustments with the power off. In order to
obtain the machine. Precision and correct ways of
adjustment while assembling, the user should read the
detailed instruction in this manual.
D. WORKING ENVIRONMENT:
(1). KEEP WORK AREA CLEAN. Cluttered areas and
benches invite accidents.
(2). DON’T USE IN DANGEROUS ENVIRONMENT.
Don’t use power tools in damp or wet locations, or
expose them to rain. Keep work area well-lighted.
(3). KEEP CHILEREN AND VISITIORS AWAY. All
children and visitors should be kept a safe distance from
work area.
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(4). DON’T install & use this machine in explosive,
dangerous environment.
E. MAINTENANCE:
(1). DISCONNECT machine from power source when
making repairs.
(2). CHECK DAMAGED PARTS. Before further use of
the tool, a guard or other part that is damaged should be
carefully checked to ensure that it will operate properly
and perform its intended function check for alignment of
moving parts, binding of moving parts, breakage of parts,
mounting, and any other conditions that may affect its
operation. A guard or other part that is damaged should
be properly repaired or replaced.
(3). DISCONNECT TOOLS before servicing and when
changing accessories such as blades, bits, cutters, etc.
(4). MAKE SURE that blade tension and blade tacking
are properly adjusted.
(5). RE-CHECK blade tension after initial cut with a new
blade.
(6). TO RPOLONG BLADE LIFE ALWAYS release
blade tension at the end of each work day.
(7).CHECK COOLANT DAILY Low coolant level can
cause foaming and high blade temperatures. Dirty or
week coolant can clog pump, cause crooked. Cast, low
cutting rate and permanent blade failure. Dirty coolant
can cause the growth of bacteria with ensuing skin
irritation.
(8). WHEN CUTTING MAGNESIUM NEVER use
soluble oils or emulsions(oil-water mix) as water will
greatly intensify any accidental magnesium chip fire. See
your industrial coolant supplier for specific coolant
recommendations when cutting magnesium.
(9). TO PRNMT corrosion of machined surfaces when a
soluble on is used as coolant, pay particular attention to
wiping dry the surfaces where fluid accumulates and
does not evaporate quickly, such as between the
machine bed and vise.
F. SPECTIFIED USAGE:
This machine is used only for general metals cutting
within the range of cutting capacity.
G. NOISE:
A weighted sound pressure level : 80 dB.
H. SAFETY DEVICE:
(1). Interlock switch on pulley cover.
As soon as the pulley cover is open, Machine will stop
with the function of this switch. Do not remove this switch
from machine for any reason, and check it’s function
frequently.
(2). Interlock switch on cutting area as soon as the cover
of cutting area in open, machine will stop at once witch
the function of this switch, do not remove this switch from
machine for any reason, and check it’s function
frequently.
CAUTION :
READ ALL INSTRUCTION CAREFULLY BEFORE USING THIS NACHINE. SAVE THIS MANUAL.
3. SPECIFICATION:
MOTOR 0.55KW ( 3/4HP ),1HP(Option)
Blade Size 19.05 x 0.8 x 2362 ( Carbon Blade )
60Hz 98 164 246 328 (FPM)
29 50 75 100 (MPM) 111 229 341 (FPM) 34 70 104 (MPM)
Saw Blade Speed 50Hz 81 135 203 270 (FPM)
24 41 61 82 (MPM) 95 193 285 (FPM) 29 59 87 (MPM)
MODEL NO. CUTTING CAPACITY 812N 812G
○(mm) 200(8”)
90°□(mm) 178x305(7”x12”)
○(mm) 127(5”)
45°□(mm) 120x125
(4 3/4”x4 7/8”)
Dimension L x W x H (mm) 1235x430x1100
N.W / G.W (kgs) 180 / 200 180/200
Packing Measurement (mm)
L x W x H 1385 x 483 x 1143
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4. TRANSPORTATION OF MACHINE:
Unpacking
1. Transportation to desired location before unpacking, please use lifting jack.
(Fig. B)
2. Transportation after unpacking, please use heavy-duty fiber belt to lift up the
machine.
Fig.B
ALLWAYS KEEP PROPER FOOTING & BALANCE WHILE MOVING THIS MACHINE.
5, Installation:
As this machine weights 125 kg. It is recommended that the machine shall be transported, with help of lifting jack.
Transportation Recommendation:
(1). Tighten all locks before operation.
(2). ALWAYS Keep proper footing & balance while moving this 125kgs machine,
and only use heavy duty fiber belt to lift the machine as Fig. A
(3). TURN OFF the power before wiring, & be sure machine in proper grounding,
Overload & circuit breaker is recommended for safety wiring.
(4). CHECK carefully if the saw blade is running in
counter-clockwise direction if not , reverse the
wiring per circuit diagram then repeat the running test.
As this machine weights 130 kg. It is recommended that the machine shall be
transported, with help of lifting jack.
Transportation Recommendation:
(1). Tighten all locks before operation.
(2). TURN OFF the power before wiring, & be sure machine in proper grounding,
Overload & circuit breaker is recommended for safety wiring.
(3). CHECK carefully if the saw blade is running in
counter-clockwise direction if not , reverse the
wiring per circuit diagram then repeat the running test.
(4). KEEP machine always out from sun, dust, wet, raining area.
Installation steps for plastic belt cover:
A), Open plastic molded belt cover. Inlay the left indentation to the bottom of the pulley, if the gap is too small. Loose the
fixing screws of pulley. Then, move the pulley out slightly, it will be very easy to set in.
B). Turn the belt cover with the direction of counterclockwise, which enable the indentation set into
the pulley, if the gap is too small. Loose the fixing screws of pulley. And move the pulley out slightly, then, it will be
easy to set in.
C). Inlay the left indentation completely to the pulley. Adjust the pulley at the same level surface, then, fix all related
screws.
-4-

6. MINIMUM ROOM SPACE FOR MACHINE OPERATION
7. MAKE PROPER TOOTH SELECTION
For maximum cutting efficiency and lowest cost per cut, it
is important to select the blade with the right number of
teeth per inch (TPI) for the material being cut. The
material size and shape dictate tooth selection.
You need to consider:
1.The width of the cut. That is, the distance in the cut that
each tooth must travel from the point it
enters the workpiece until it leaves the workpiece, and
2.The shape of the workpiece.
zSquares, Rectangles, Flats (Symbol : ■)
Locate the width of cut on the chart. (Inches on the outer
circle and millimeters on the inner circle.) Select the tooth
pitch
TOOTH SELECTION
on the ring marked with the square shape which aligns
with the width of cut.
EXAMPLE: 6" (150mm) square, use a 2/3 Vari-Tooth.
zRound Sollds (Symbol : ●)
Locate the diameter of your workpiece on the chart.
Select the tooth pitch on the ring marked with the round
shape which aligns with the size of stock you are cutting.
EXAMPLE: 4" (100mm) round, use a 3/4 Vari-Tooth.
zTubing, Pipe, Structurals( Symbol : O H ^ )
Determine the average width of cut by dividing the area
of the workpiece by the distance the saw blade must
travel to finish the cut. Locate the average width of cut on
the chart. Select the tooth Ditch on the ring marked with
the tubing and structural shape which aligns with the
average width you are cutting.
EXAMPLE: 4"(100mm) outside diameter, 3"(75mm)
inside diameter tubing.
4"(100mm) OD=12.5 sq.ln. (79cm2)
-3"(75 mm ) ID= 7.0 sq.ln. (44cm2)
2120
2240
1500
Area=5.5sq.ln.(35cm
2)
5.5 sq.ln. (35cm2) / 4" (100mm)
distance =1.38(35mm) average width
1.38" (35mm), use a 4/6 Vari-Tooth
NOTE: The band speed and cutting rate
recommendations presented on this chart are
approximations and are to be used as a starting point for
most applications. For exact sawing parameters' consult
your saw blade supplier.
-5-

8. BI-METAL SPEEDS AND FEEDS
These figures are a guide to cutting 4"(100mm) material
(with a 314 Vari-Tooth) when using a cutting fluid.
Increase Band Speed: 15% When cutting
1/4"(6.4mm) material (l0/l4 Vari-Tooth)
12% When cutting 3/4"(19
mm) material (6/10 Vari-Tooth)
10% When cutting
1-1/4"(32 mm) material(5/8 Vari-Tooth)
5% When cutting 2-1/2"
(64 mm) material(4/6 Vari-Tooth)
Decrease Band Speed: 12% When cutting 8"(200mm)
material(2/3 Vari-Tooth)
BAND SPEED
MATERIAL ALLOY
ASTM NO. FT./MIN M/MIN
173,932 314 96
330,365 284 87
623,624 264 81
230,260,272 244 74
280,264,632,655 244 74
101,102,110,122
,172 234 71
1751,182,220,51
0 234 71
625,706,715,934 234 71
630 229 70
Copper
Alloy
811 214 65
1117 339 103
1137 289 88
1141,1144 279 85
1141 HI
STRESS 279 85
1030 329 100
1008,1015,1020,
1025 319 97
1035 309 94
1018,1021,1022 299 91
1026,1513 299 91
A36(SHAPES),1
040 269 82
1042,1541 249 76
1044,1045 219 67
1060 199 61
Carbon
Steel
1095 184 56
8615,8620,8622 239 73
8640, 199 61
Ni-Cr-Mo
Alloy Steel E9310 174 53
Tool Steel A-6 199 61
A-2 179 55
A-10 159 49
D-2 90 27
H-11,H-12 H-13 189 58
420 189 58
430 149 46
410,502 140 43
414 115 35
431 95 29
440C 80 24
304,324 120 36
304L 115 35
347 110 33
316,316L 100 30
Stainless
Steel
416 189 58
TELLTALE CHIPS
Chips are the best indicator of correct feed force. Monitor
chip information and adjust feed accordingly.
Thin or powdered chips – increase feed rate or reduce
band speed.
Burned heavy
chips – reduce feed rate
and/or band speed.
Curly silvery and warm chips –
optimum feed rate and band
speed.
9. ASSEMBLY
A 3/4 HP, motor, split phase or capacitor-start it
recommended for best economical performance.
Counterclockwise rotation is required. Note that rotation
can be reversed by ollowing directions
given on terminal or nameplate.
(1). Assemble the motor Mounting plate to the head using
the long bolt Note that the flat side of the plate faces up.
(2). Assemble the guard plate to the head using the
screw and Lock Washer and the Carriage Bolt Washer
and Wing Nut are used to secure the motor mounting
plate to the Guard plate through the slotted hole in the
Guard plate. These components also serve to position
and lock the motor in place for proper speed/ belt
adjustment.
(3). Place the spacer over the long Bolt and secure it wit
the nut .
(4). Secure the Motor to the Motor Mounting plate with
the four bolts and nuts. Note, that the motor shaft is
placed through the large opening in the Guard plate and
must be pareallel with the drive Shaft.
(5). Assemble the Motor Pulley, the smaller of the two
provided, to the motor shaft Note, the larger diameter
must be closest to the motor.
-6-

Do not tighten the set screw.
(6). Assemble the Driven Pulley, the larger of the two
provided, to the protruding drive Shaft Note the small
diameter must be closest to the bearing.
Do not tighten the set screw.
(7).Place the belt into one of the pulley grooves and the
other end into the respective grooves of the second
pulley.
(8) Line up the belt and both pulleys such that the belt is
running parallel in the pulley grooves.
(9).Tighten the set screws of both pulleys in this
position.
(10). Place the belt into proper pulley combination for
proper blade speed. See material cutting Chart .
(11). Adjust the position of the Motor to obtain
approximately 1/2" depression in the belt when applying
pressure with your thumb.
(12). Tighten the head screw Holding the Motor
Mounting plate to the Guard plate.
(13). Connect the Electrical Harness to the motor
terminal box. The motor should be protected with a time
delay fuse or circuit breaker with a rated amperage
slightly greater than the full load amperage of the motor.
10. OPERATION
A. WORK SET UP:
(1). Raise the saw head to vertical position.
(2). Open vise to accept the Piece to be cut by
rotating the wheel at the end the base.
(3). Place workpiece on saw bed. If the piece is
long, support the end.
(4). Clamp workpieced securely in vise.
B. WORK STOP ADJUSTMENT:
(1). Loosen the thumb screw holding the work stop
casting to the shaft.
(2). Adjust the work stop casting to the desired length
position.
(3). Rotate the work stop to as close to the bottom of the
cut as possible.
(4). Tighten thumbscrew.
(5). DO NOT ALLOW the blade to rest on the work while
the motor is shut off.
C. BLADE SPEEDS:
When using your Band saw always change the blade
speed to best suit the material being cut the material
Cutting Sheet givers suggested settings for several
materials.
Speed M.P.M
Material 60Hz 50Hz
Tool, Stainless
Alloy Steels
Bearing Bronze 29 24
Medium to High
Carbon Steels
Hard Brass or Bronze 50 41
Low to Medium
Carbon Steel
Soft Brass 75 61
Aluminum Plastic 100 82
MANUAL OF GEAR TYPE SPEED CHANGING
(1) Select the proper cutting speed according to the
material of work-pieces
and blade select chart.
(2) Turn the speed-changing handle directly for the
necessary speed.
(3) Changing speed during cutting is prohibited.
(4) But changing speed when machine is stopped and
running (before cutting)
is available.
***Please make sure the oil of Gear Box is
between 950cc ~ 1000cc to maintain the
machine in a proper operation.
-7-

D. BLADE DIRECTION OF TRAVEL:
Be sure the Made is assembled to the pulleys such that
the vertical edge engages the work piece first.
BLADE MOVEMENT
EMERGENCY STOP
Blade Direction
E. STARTING SAW:
E-1.Switch button function description
**Coolant switch was integrated in with the
toggle switch. Coolant function is ON when
you start the machine running, If you do not
need the coolant function, please turn of the
rocker switch on the coolant pump.**
A ↓Stop button
B ↑Start button
E-2. STARTING SAW:
Switch button function description (FOR CE ONLY)
E-3. Electromagnetic Switch
The self-latching, lockable EMERGENCY
STOP button is equipped with an under voltage circuit
breaker.
When the switch is in closed position, it
may be secured with a padlock to prevent
the machine from being turned on accidentally
or by unauthorized personnel.
ON / OFF switch
Open the cover of the switch in order to
switch on the metal belt saw.
Close the cover after switching on to
guarantee
correct operation of the EMERGENCY
STOP function.
To
gg
le Switch
MERGENCY STOP button
AUIION: NEVER OPERATE SAW WITHOUT
BLADE GUARDS IN PLACE.
Be sure the blade is not in contact with the work when
the motor is started. Start the motor, allow the saw to
come d
NOT DROP OR FORCE.
.
inness of the work to be cut:
E
C
to full speed, then begin the cut by letting the hea
down slowly onto the work. DO
Let the weight of the saw head provide the cutting force
The saw automatically shuts off at the end of the cut.
F. BLADE SELECTION:
A 8-tooth per inch, general-use blade is furnished with
this metal Cutting Band Saw. Additional blades in 4, 6, 8,
and 10 tooth sizes are available. The choice of blade
pitch is governed by the th
the thinner the workpiece, the more teeth advised. A
minimum of three (3) teeth should angage the
-8-