Northfield Tilting Arbor Variety Saws are engineered
and built by a company with over sixty years of experience in
machinery.
machined
of manufacturing. Completed machines are carefully
inspected using
insure
maintained. These machines possess features desired
for variety sawing in most applications. The rugged
construction of these machines allow
for cutting metals, plastics and compositions as well
as woods.
WIDE
Northfield Tilting Arbor Variety Saws are available
in four different models, each of which is designed for
EXPERIENCE
the
and
that
CHOICE
OF
OVER
manufacture
All
machine components are accurately
carefully controlled during each phase
the
only
the
of
quality
latest in testing equipment to
highest quality standards are
OF
MODELS
60
woodworking
them
to be used
a variety of uses. Each model can accommodate saws
from
14
" to 18". The saw arbor can be tilted from 0°
45°
through a conveniently located
to
vertical saw
capacity for each machine is listed on the specification page.
THE
GAUGES
furnished consist of two sliding, combination, cut-off
or mitre gauges with dovetail gauge strips permitting
them
An adjustable rack and pinion type rip fence
nished. A double face, box type fence can be furnished as an option . This fence provides an additional
6" rip capacity.
adjustment
to be drawn clear of
of 4" is standard. The stock
the
hand
table without falling.
wheel. A
is
fur-
Page 3
EACH
MACHINE
Each NORTHFIELD machine is carefully tested with modern vibration analyzing
equipment. Thus, even conditions hidden from view which might interfere with the
smooth, long life of the machine are detected
IS
ELECTRONICALLY
and
BALANCED
corrected.
BRETT
TYPE
GUARD
OPTIONAL
An
automatic
vated from the regular start-stop
station is offered as an optional extra. A
hand
operated remote control brake is avail-
able
with
or
power when the brake is applied.
Guards of various types with splitters
anti-kick back dogs are available including
the Surty, Flohr
trical components are completely encased
and all wire is inside flexible conduit.
PRECISION
All tables on Northfield Tilting Arbor
Variety Saws, whether stationary or rolling
are carefully seasoned, heavily ribbed
precision planed
FEATURES
electric brake which is acti-
pushbutton
without a switch
and
Brett
to
cut
and
type . All elec-
TABLES
and
polished to
maintain
the
and
accuracy. A graduated scale is marked on
the top for ripping widths. Dovetailed slots
are provided for the sliding gauges.
ROLLING
Three different models of the Number 4
Tilting Arbor Variety Saw are available with
rolling tables
and
accurate cross cutting. The standard
rolling top has a
The
solid rolling section model has a 50" x
54"
rolling section
hard
to
handle
rolling table is designed for use with jigs
fixtures
section .
measures 36" x 52".
tions on all of the above machines roll on
precision sealed for life ball bearings
life
machines have sliding dado openings and the
large rolling top machines have a removable
dado throat.
and
that
The
constant
TABLES
to
facilitate mitering, grooving
17
W' x
45
W' rolling section.
to
accurately
panel
stock.
need
to
be secured to the rolling
rolling section on
The
accuracy.
cut
wide
The
this
non-stationary sec-
Standard
and
slotted
and
table
for
long
e·
Page 4
HIGH
LIFE,
QUALITY,
SAWARBOR
LONG
0
The Saw Arbor of high quality stress-proof steel runs
in precision heavy-duty sealed-for-life ball bearings.
An
arbor extension can be furnished with the machine
that
accommodates dado heads up to
totally-enclosed, fan-cooled motor is
4"
built
wide.
on
The
the
arbor and is controlled by a magnetic switch with
pu~h-button
station.
which
is
vital to a precision machine of this type. The
careful machining and close fit of these components
enable the arbor to be smoothly tilted by a large easily
reached
provided to lock
hand
wheel. A positive locking device is
the
arbor in any position .
The arbor carriage is mounted in gibbed ways in the
and
cradle
can be adjusted vertically by a large hand
wheel.
EXTRA
SURFACES
CARRIAGE
The Arbor Carriage Cradle
LARGE
FOR
CRADLE
is
mounted on two excep-
BEARING
ARBOR
fj
tionally large segments as may be seen on the illustration. These segments provide a large bearing surface
ONE
STRENGTH
The Base
maximum strength and has a pleasing design.
machine
PIECE
is
a heavy one-piece casting engineered
components
MAXIMUM
CASTING
are securely
6)
attached
to
for
All
the
base permitting vibration-free operation for optimum
ANY
IS
BODILY
CAUTION
SAFETY
LUBRICATION
CONTAINED
ARE
INFORMATION.
FAMILIARIZE
CONTENTS
THE
MACHINERY
CAPABLE
OF
INJURY.
AT
All
RULES,
IN
FOR
YOUR
YOURSELF
PRIOR
MACHINE.
INSTRUCTIONS
THE
COMPLETELY
USED
CAUSING
USE
TIMES.
OPERATION
FOR
CUTTING
SERIOUS
EXTREME
THE
AND
MANUAL
PROTECTION
AND
WITH
TO
OPERATING
THE
Revised 1982
Page 7
GENERAL SAFETY INSTRUCTIONS
The safety rules contained herein are printed
observe them strictly. If there are any portions of this manual that you
for
hesitate to contact your supervisor
Your undivided attention is required when operating this machine. Concentrate fully on the task at hand and
accord the arbor saw the respect a machine
safe, efficient operation. The following list of safety instructions are general
rate specific rules related to your application.
1.
Do
not wear loose clothing while operating this machine.
2. At all times give your full attention to the machine while operating.
3.
Be
sure the guard is in position before operating machine.
4. The blade should be raised only high enough to make the cut thru the stock.
5. A push stick must be used when ripping narrow pieces.
Be
6.
7.
8. The dust collection system should be turned on before operating machine.
9. When operating, stand slightly to the left of the saw blade. Never
10
11
sure to select the
Keep the floor around the machine clean, also the table surface.
. Make sure on rolling table machines the table is locked, except when in use.
. Make sure the saw blade has come to a complete stop before making any adjustments on the machine.
proper
clarification.
of
blade
for
for
your protection and well-being. Read them carefully and
do
not understand completely,
this type is due. Usage of your good
in
nature and you will want to incopo-
your
type of cut.
in
line.
common
do
sense is essential
not
for
12.
Clear scrap pieces by the blade with a scrap stick, never use your fingers.
13
. Check stock
14.
Be sure to know where the stop and start control is located on the machine.
15.
Make sure the saw blade has come to a complete stop before leaving machine.
16
. Check the saw blade periodically
17
. Be sure the machine is properly grounded .
18.
When installing the blade, be sure the
19
. Make sure all electrical power is turned off and cannot be accidently restarted before making any
ments, replacements, lubrication
20.
Always wear
21. Use
22. Use
the
all guards, jigs, fixtures , push sticks, feather boards, and holding devices, which will add to
safety of the operator.
WARNING:
Under normal work usage, and if
age is
efficiently
Voltage
order.
supplied
on
on
for
nails, staples, etc. before cutting.
for
dullness, cracks, teeth missing, etc.
arbor
or
repairs.
proper
arbor
eye and ear protection around machinery.
wrench furnished to loosen and tighten the
ELECTRICAL
Connections and changes in electrical
connections should be made by a qualified electrician only.
proper
to
the
motor
the voltage as connected at the factory.
the
machine
will
your
vary
saw will
as
per
(full) volt-
operate
customer
nut is tight.
arbor
nut.
CONNECTIONS
Connect power supply wires to terminals L-1, L-2,
and L-3
blade end of the motor, the saw blade must be turning
in a clockwise direction. If not, change any two of the
terminal wires to change direction of saw blade rota-
tion. If the saw blade does not turn
direction, the nut may come loose and the blade may
fly off the
in
the magnetic starter. Looking from the saw
in
arbor
.
adjust-
a clockwise
2
Page 8
UNPACKING
Your NORTHFIELD VARIETY SAW was checked
and operated before it left the factory to be shipped to
you.
Remove crating and secure the machine to the
floor , the protective coating of rust preventive
com-
pound should be removed from all parts of the machine
LUBRICATION
The ball bearings in the
sealed for the life of the bearing.
A good grade of SAE
grease are recommended
requiring oiling or greasing.
A few
drops
of oil should be applied to the tilting
screw bearing, which is next to the tilting screw hand
wheel.
Apply a light coat
of
tilting screws.
Use a light coat of oil on the
which has two bearings on the tilting apron located
inside the machine.
A multi-purpose grease should be used on the
tilting apron rockers
as
motor
are lubricated and
20
oil and a multi-purpose
for
general use on all parts
oil to both of the elevating and
motor
elevating shaft,
needed.
by a good grade of kerosene or a good grade of noninflammable material. Care must be taken to see that
all elevating and tilting screws are clean.
Lubricate all parts as per lubrication instructions.
Check to make sure that all parts move freely without
binding
The
or
striking.
motor
elevating shaft gears should be kept
well greased.
Apply a light film of oil to the two cable cross cut
gauge slides every day. Keep the slides clean. If the
slides should become sticky , wash out with kerosene
and
dry
before applying oil.
door
Remove
on the side of the machine and clean
out saw dust from the metal chute every day. If the
machine is hooked up to a dust collection system, it will
not be necessary to clean the dust chute but once a
week.
Be sure to wipe
off
excess oil and grease when
servicing.
OIL
-
GREASE
GREASE
[__
GREASE
--------
GREASE
~
OIL
Ql'=.-
USE
GOOD
G..B£AS.£
-MULTI-PURPOSE
LUBRICATE
GRA!JE
AS
OF
SA E
NEEOEO
20
3
Page 9
OPERATIONAL CONTROLS
ELEVATING SAW ARBOR
There
is
one control used to set the height of the
saw arbor. This
reference
clockwise will raise the
tilting arbor hand wheel
for any angle from 0 degrees to 45 degrees.
pointer Z-11 0 dwg. Z-279) up with the angle on the
degree scale and lock
the extension and the
the table.
the push button station
brake hand knob to apply the brake and wait till the
motor stops.
No.
To
set arbor tilt loosen the lock knob and turn the
In
setting for any angle desired, line the degree
If using a dado extension when tilting make sure
In
using the hand brake , first shut off the
is
the arbor elevating hand wheel (see
5,
drawing Z-279) turning the hand wheel
arbor
to the desired height.
TILTING
SAW
ARBOR
(6
, dwg. Z-279) clockwise to set
in
place with the lock knob.
dado
do
not hit any place under
HAND BRAKE
(8,
dwg. Z-279) then pull on the
motor
at
RIP FENCE
For coarse adjustment of the rip fence pull out the
spider table pins and relocate the fence to the desired
position and reinsert the pins. Once the rip fence has
been positioned adjusting can be made by loosening
the lock plate handle and turning the hand knob.
Turning the hand knob clockwise will move the
fence into the saw blade. After the rip fence is in proper
position to the saw blade, lock in place with the locking
plate handle.
MICROMETER
Coarse adjustment of the micrometer rip fence is
the same as the standard rip fence.
In
order to move the fence, first loosen the locking
plate handle, then loosen the thumb screw. This will
allow you to turn the hand knob so
as
close
as
possible to the desired setting.
Now your fine adjustment can be made by turning
the thumb screw back to clamp the adjusting shaft.
Then by turning the micrometer hand knob clockwise
it will move the fence into the saw blade.
When the desired setting has been obtained, lock
the fence in place by turning the locking plate handle.
RIP FENCE
as
to move the fence
.
..
4
Page 10
MITER
The
miter
gauge
degrees either to the right
(14, dwg. Z-279) loosen the hand
GAUGE
will
go
from 0 degrees
or
left, to set the miter gauge
knob
(DK-3) and turn
to 60
the miter gauge and set the angle on the degree scale
and lock
NOTE:
place with the hand
REPLACING SAW BLADE
Make sure that the power is off and that
knob
.
motor
in
cannot be accidently started.
First place the
vided at the end of the
arbor
shaft from turning. Remove the throat plate ( 13,
arbor
holding pin in the hole
arbor
shaft to keep the
pro-
motor
dwg. Z-279) by lifting up.
Then use the
arbor
wrench provided to remove
the arbor nut (13, dwg. Z-279) and the loose saw collar
arbor
by turning the
nut clockw ise.
After replacing the saw blade, make sure that the
arbor
is tight by turning counter clockwise, and remove
arbor
the
holding pin before starting the motor .
SQUARING ARBOR
TILT
When checking for squareness , elevate the motor
to its
highest
Check the
position
arbor
without
forcing
it at the
top
squareness by placing a square on
the table (not on the throat plate) and the leg of the
square against the side
of
the saw blade (not against
the teeth of the blade).
To
base
adjust
under
the blade look on the inside of the main
the
motor
arbor
and locate the arbor tilti
ng
connecting arm (17, dwg. Z-280) and remove the dust
guard (14, dwg. Z-280). The tilting stop screw (16, dwg.
Z-280) is located at the far end of the
arbor
tilting screw
(10, dwg. Z-280), the tilting stop screw controls the
vertical position of the blade.
nut
Next loosen the jam
tilting stop screw
in
to provide a gap between the arbor
(15, dwg. Z-280) and turn
tilting screw and the tilting stop screw for adjustment
of the saw blade .
Then square the saw blade to the table by turni
arbor
tilting hand wheel till the saw blade is square to
ng
the table. Once the saw blade is square to the table
turn the tilting screw
arbor
tilting screw and lock in place with the jam nut.
out
until it contacts the end of the
Then replace the dust mover .
Now if the tilting degree scale (20, dwg . Z-279)
does not line up with the degree pointer
(1
01,
dwg.
Z-279) loosen two screws (19, dwg. Z-279) on the scale
and readjust the scale to the pointer. Then retighten
the two screws to lock the degree scale in place.
.
5
Page 11
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12
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CONNECTING
SET
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ARM
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SET
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Page 15
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BRAKE
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-8
14HS
516-1HHCS Cap screws (4)
203BB Ball bearings (2)
516-114HHCS
DK-3 Hand knob
Z-188 Stop pin
Z-192 Table extension legs
Brake
drum
Brake mount plate
Brake band
Cable lock lug
Brake cable (std)
Brake spring
Brake cable for limit switch
Woodruff key
Cotter pin (1)
Set screw
Cap screws (
Set screws (2)
(1)
(1
)
4)
TABLE ASSEMBLY
Sliding table, left side
Bevel gauge
Bearing holders
Sliding stock stop (for sq. rods)
Side handle
Stop rod lock bolts
Gauge table pins
Stop
rod (short)
Stop rod (long)
Stop rod block (for round rods)
Ball bearing shaft
Slot filler strip
Hand knob
Hand knob lock
Slide handle mounting
Table lock handle
Thumb
screw
Capscrews
(6)
LOWER TABLE ASSEMBLY
ZRT-31
ZRT-
32
ZRT-
34
ZRT-
35
ZRT-38
39
ZRT-
Stationary table
Lower stationary table
Table
support
arm in feed side
Table
support
arm outfeed side
Hand knob lock plates
Ball bearing holders
Z-146
Z-148
Z-149
Z-150
Z-153
Z-169
Z-171
Z-26
316-134SP
516JN
516-114
SHSS
14-12SHSS
38-214SHSS
38-JN
38W
38-114BHCS
38-1 HHCS Cap screws (9)
38-1 SHSS Set screws
12-134HHCS Cap screws
38-114HHCS Cap screws
Z-251
Z-189
14-12RHMS
14W
6-14DS Dust pan
38-1 HHCS Dust chute ring bolts
1 0-34RHMS Tilting degree plate screws
12-112HHCS Table leg to base bolts (4)
12
Motor
Apron rocker bolts
Main base stationary cradle bolts
Apron dust wing bolts
Apron
Apron
Apron
Motor
Motor
Motor
Motor
Tilting degree pointer screws (2)
Apron tilting set screw
Apron tilting screw bracket bolts
Apron tilting screw hand wheel screws (2)
Motor
Motor
Motor
Crosscut gauge degree plate screws (4)
Stock guide bolts (2)
Motor
Motor
Woodruff
Snap ring (2)
(5)
(3)
(9)
(6)
(8)
drive
screws
throat
plate pad screws
guard swing apron spacer bolts
upper
bumper
upper
bumper
upper
bumper
elevating screw lower collar spring pin (1)
elevating screw gear spring pin (1)
elevating shaft hand wheel screws (2)
elevating shaft bearing bracket front screws
base gib holding bolts (6)
base gib set screws (3)
base gib lock nuts (3)
nuts (4)
acorn nuts (4)
key (1)
(7)
(6)
(4)
bolt (1)
screws (2)
set screw lock nut
(1)
(2)
(4)
(4)
(4)
(2)
(6)
(1)
(2)
(2)
15
Page 21
SAFETY GUIDES
Read Completely Before Attempting To Operate Carbide Tipped Saw Blades
• This leaflet of safety and operating
instructions is not intended to
not totally comprehensive; that
does not, and cannot, cover every
possible safety problem which may
in
using specialized and standard
arise
tooling
on
applications. This leaflet
intended to generally describe many
the basic safety and operating
procedures which should be followed,
and
considerations which should be
considered in operating cutting tools.
None
presented in this leaflet should be
interpreted to
or safety protection .
The drawings
particular design, type,
tools, equipment
drawings are illustrative only and are
not
exact mode, method
All Federal and State laws and
•
precedence over the statements and
information presented in this leaflet.
Users
adhere
aid to cutting tool users a number
such regulations are listed below. The
list does
that may apply :
1. The Federal Register dated June
2.
3. American National Standards In-
4. American National Standards In-
5. Other ANSI , State and/or Federal
varying machines and
to describe the types of safety
of
the statements
imply
do
not
or
machines. The
to
be construed to establish any
gulations having
vering the safety requirements
tting tools at the point
of
cutting
to
all such regulations. As
not
197
4, Dept.
and Health Administration (Th!l
OSHA Act)
American National Standards Institute,
lations for Woodworking Machinery)
stitute,
ments for Sawmills)
stitute, P1.1-1969 (Safety Requirements for Pulp, Paper and Paperboard Mills)
Codes and Regulations which may
apply
in
jurisdiction
tools must,
include all regulations
of
Labor, Office
01
.1-1975 (Safety Regu-
02
.1-1969 (Safety Require-
your operation
SAFETY RULES WHICH APPLY
THE OPERATION OF ALL CARBIDE
TIPPED CUTTING TOOLS
1.
Always inspect the cutting
completely before mounting. Never
attempt to operate a tool which has
&hipped
-r teeth that are not sharp. You must
or
bent teeth
be familiar with normal wear
conditions for the type
used. The tool must be completely
clean to allow proper visual
inspection.
be
is,
is
rather
or
information
any warranty
depict any
or
size
of
or
procedure.
of
usage take
of
course,
of
tool
or
cutting edges
of
tooling
and
it
of
an
of
Safety
to
CARBIDE
2.
Do
not
is
tools
not
operational
from
representative
familiar and properly trained and
experienced on the machine to insure
of
your
familiar with all
manufacturer's written instructions,
guides and manuals before operating
machine. You must use and be familiar
with all controls, safety devices and
emergency stop mechanisms to
operate a machine safely.
3.
not properly aligned
feed. Do not allow sideward, twisting
or
other than forward pressure on the
cutting
cut
4.
rotate in the proper direction before
cutting
rotate against, rather than with, the
direction
machines. Do not
machines.
5.
hardness' or
which the cutting tool was designed
cut. Never attempt to
with a tool unless you have personally
checked with
sure the cutting tool was designed
the specific type
to
27,
TO
be
cut, and
This
attempting to
i.e., cutting more than one piece at a
time.
6.
cutting tool such that it causes the
or machine
operating speeds. A safe and proper
cutting operation will not require
much force in feeding material. If
material begins to "ride
cutting tool, or requires undue
pressure to feed the material into the
tool,
experienced, do
cut-turn
condition
7.
of
all
parts while the machine is in
operation .
and mechanical feed devices in all
possible cases. When cutting material
of
such size, shape
necessitates close approximation to
the cutter and mechanical feed
1.
2. Density
attempt
or
mac;hinery with which you are
familiar or have not received
training-get
your
supervisor, his designated
or
a trainer who
safety. Become completely
Never operate a
.
Make sure the tool
Do not cut materials
is
particularly important when
Never force-feed materials into a
or
Keep body and
cutting
Hardness
material
of a material to resist tearing
breaking .
material compared to its volume.
of
the machinery
tool in feeding material into a
any material. The tool must
of
feed on all hand feed
climb
density'
your
supervisor to make
of
for
the depth
cut
"stacked" material,
motor
to
if undue vibration
not
off all power and correct the
.
tools and other moving
Use
work holding fixtures
or
is
the resistance
to
being
is
the· compactness
for the operation
TIPPED
to
operate cutting
assistance
is
cutting
tool that
to
the direction
is
mounted to
on hand feed
of
a type,
other than that
cut
materials
cut
desired.
on the
well clear
for
of
of
material you wish
of
slow down below
up"
is
continue the
clothing
type that it
cutorthestrength
is
of
to
tool
a
or
a
SAW BLADES
mechanisms cannot be used, use a
wood "push stick"
so that no part
clothing
comes close
tool.
8.
Never attemp
tool or clear pieces
the cutting area while machine power
is
"on"
or
or
Allow
or
machine. Never attempt
slow a rotating
applying a hand-held
object
drive
rotational path
absolutely necessary, and then only if
there
barrier between you and
tool. Remember that carbide tips are
very hard and, therefore, brittle. The
tips can break away under incorrect
side thrust
foreign material is allowed
the tips. An operator can reduce the
danger
of
beside the material he
the machine rather than in back
10.
while
any part
moving.
11. Never operate a machine
using all
downs and safety devices
machine being operated.
12. Machines must be maintained to
the manufacturer's standards and
current safety standards.
13.
shield
when operating
CIRCULAR SAW BLADES AND
SAW MACHINE TOOLS
MOUNTING INSTRUCTIONS
1.
MACHINE POWER. Clean the saw
arbor, saw collars, sleeve and arbor
nut. Remove nicks and burrs by very
lightly
area. (Do
abrasives).
2.
AND
the machine
by hand (without rotating the arbor) .
There
movement. Next, rotate the arbor
hand . If the bearings are in
condition, the arbor should turn freely
with no sticking
the arbor, set up a dial indicator
shown in Fig.
true
when
any part
of
the machine
cutter rotation
by use of a brake if supplied on the
to
the
cutter
as
a brake.
9.
Do
not
place
is
a complete and adequate
or
twisting forces,
of
being hurt by a
the material if he always stands
Never leave machines unattended
cutting
tools are still rotating
of
the machine
of
the hoods, guards,
Always wear safety glasses
to
completely protect
TURN OFF AND
honing any nicked
not
use coarse files
WITH
ALL
MACHINE
LOCKI:D
arbor
should be no feeling
the
1.
motor
within
of
to
feed the material
of
your
body
to
the cutting
to
clean a cutting
of
material from
cutting
tools, material
to
stop by itself,
cutting
of a cutting
OUT
or
The
to
tool by
or
any
, arbor, spindle
your
body
the
"kickback"
is
feeding
or
material
for
cutting
tools.
LOCK
OUT
or
POWER OFF
, pull and push on
sideways in and
of
proper
rubbing .
arbor
should run
manufacturer's
or
is
moving.
stop
or
other
or
in the
tool unless
cutting
or
if
to
contact
into
of
it.
or
is
without
hold-
the
or
face
your
eyes
ALL
burred
or
out
by
To
check
as
Fig. 1
DIAL
INDICATOR
MOTOR
CHECK ARBOR TO
MOTOR MANUFACTURERS SPECIFICATIONS
specifications. Set the dial indicator to
bear on the fixed collar
and turn the arbor (Fig.
fiXED
INDICATOR MAC
should run true within the machine
manufacturer's specifications.
3. WITH
LOCKED OUT, align the saw blade
with the direction
checking alignment
ground
diameter by
arbor in the same manner
blade (see Fig. 3). Set up a dial
Fig. 3
indicator
along the guide rail or feed
mechanism. Position the dial indicator
so it can traverse across the plate
either above
collars. Set the dial indicator to zero at
the leading edge
A. Fig.
to the trailing edge (Position B, Fig.
liD
I Cutting Tool Manufacturers'
ALL
plate
METHOD OF
CHECKING
ALIGNMENT
so it can
3)
and move it across the plate
WOODWORKING
MANUFACTURERS OF AMERICA
\NI1Y11a
CCOPYRIGHT WMMA 1980, ALL RIGHTS
Reproduction of this material
port,
In
any lorm
written
perml11lon
approval
of
WMMA.
RUN
TRUE WITHIN
of
the arbor
2)
. The collar
COLLA
R
Of
MACHINE ARB
M
OTOR
CHECK FIXED COLL
V.
or
AR
TO
HIN
ERY
POWER OFF AND
of
10
inch thick on the saw
below the mounting
of
Is
slrlclly prohlblled wllhoul
of
RUN TRUE WITHIN
MAN
UFACTURERS SPECIFIC
of
feed. A method of
is
to mount a flat
or
12
inches
as
be
moved by hand
the plate (Position
MACHINERY
Division
In
WMMA end
without
OR
a saw
RESERVED
whole or
ATI
1n
copy
ONS
3)
.
Page 22
Any error in the plate flatness can
be
eliminated by rotating the plate by
is
moved
to
hand so that point A
B when reading the indicator. Any
deviation in angularity between the
saw blade and the direction
should be maintained within the
machine manufacturer's recommendations. On double
cut-off
point
of
feed
and panel
trim machines any slight angularity in
be
aliQnment should
the trailing edge
not re-cut the material.
controlled so that
of
the saw blades do
4. WITH ALL MACHINE POWER OFF
AND LOCKED OUT, inspect the saw
blade before mounting. The bore
(center hole) must be the correct size
and fit snugly. Do
other type of tool on
tighten mounting screws unequally,
use incorrectly fitted keys. Incorrect
mounting of saws
not
force a saw
an
arbor. Do not
or
other tools can
or
cause tool breakage and create
dangerous operating conditions.
Never mount a saw blade with a
damaged (deeply scored or out
round) bore or arbor. Inspect the teeth
carefully. Do
damaged bodies, dull
not
mount
or
of
blades with
damaged
(bent or chipped) teeth. Never use
anything other than accurate metal
or
spacers if saw blades have to
shims
be positioned on the arbor. Never use
shims to "wobble" a saw blade.' Be
sure that all saw collars used match
of
the
the saw
to
exactly in diameter. Closely check
see
that the arbor
nut
threads are not
worn and the wrench surfaces
arbor
nut
are not rounded off.
5.
WITH ALL MACHINE POWER OFF
AND LOCKED OUT,
on
the arbor making sure that
blade
the saw blade
mount
is
turning in the correct
rotation and that the arbor nut tightens
in a direction opposite to the blade
rotation (See Fig. 4A
Fig.
4A
OvtR-RUNNING
CUTTING
TOOl
~~·
TIGHTEN$ IN
:::.o~~~
OffHII!tOOl
& 4B). Unless the
.,._
,.._.,
,""'_,__...,
the tool
is
correctly
locked on
.turns freely (no foreign objects in tool
the
rotation path) and is properly
positioned
for
required (See Fig. 3). Check
the
cutting
that
damaged.
of
special precaution
':~eck
the saw blade
cutters" to be sure that all bolts, pins
and threaded parts are
damaged, and are properly mounted.
Be sure that hubs on all
tools are properly fitted and pinned
and that the locking collars are in
place and fit properly. Do
locking
collars that are not matched
the "split
tools are
or
2.
AND
are
do
manufacturer's machine load
specifications in either size or weight,
or
machine design limitations. Operate
WITH
LOCKED
not
attempting
not
conform
that
do
tool."
not
ALL
not
saw machine tools
materials,
applications
designed. (If you
information, ask
not
machine tools in excess
machine or tool manufacturer's
specifications, or current applicable
OSHA standards,
18,000sfm (surface feet per minute).'
(See Charts A and B following).
3.
AND LOCKED
cutting
material hold-downs so that the
material
This will insure there· will be minimal
material vibration. Next, follow the
cutting
operate saw blades
WITH
ALL
tool, material guides and
to
be
machine manufacturer's instructions
to
mount
all guards over the tools such
that the guards are close to, but
properly clear, the material being cut.
Mount
and activate all
safety devices such
mechanisms, spreaders, dust hoods
Fig.
48
UHDI!R·RUNNINO
CUTTINO
TOOl
~m
,~
~:·~~~~~~~~§~~~~~~;;~
and safety switches. Make sure all
personnel and all loose
objects are clear
cutting
tools.
4.
TURN ON MACHINE POWER, start
the tool
rotation slowly before feeding
material. This
(that is, pressing the start button and
immediately after that pressing the
machine
is
specifically designed for
such cutting, never mount saw
machine tools to "climb
cutting in the same direction
on manually fed machines. Never use
saw blades on operations
they were not designed;
do not use rip design blades to cut
across the grain, etc .
cut"
for
for
(teeth
of
feed)
which
example,
CIRCULAR SAW BLADES AND
SAW MACHINE TOOLS
START-UP PROCEDURES
1.
TURN OFF AND LOCK OUT
MACHINE POWER. Never assume
ALL
previously set machine or tool
to
conditions
3.
Mounting a saw blade to "wobble"
means to shim the blade body unequally on one side, throwing the
saw out
be correct. Be sure that
of
alignment with the arbor.
This causes the saw to make a wider
cut
and dangerously increases
pressures on the tool.
stop button). At a safe distance,
observe the operating condition
tools (by sight and sound)
rotate slowly. Next, TURN
MACHINE
OUT, wait until all
tools stop rotating by themselves (do
not attempt
yourself unless a brake
provided
POWER OFF AND LOCKED
to
for
machine). and make any necessary
corrections.
Go
noted in paragraph
before you TURN THE MACHINE
POWER ON. Press the start button
and allow the machine
4.
"All
cracked saws shall
from service," Department
OSHA Standards, Federal Register
29CFR Part 1910.213(S)
5.
The term "surface feet per
refers to the peripheral or rim speed
of
a cutting tool. See "Operating
Speeds for Carbide Tipped Rotary
Cutting Tools" below.
mounted, properly
arbor
(See Fig . 4A & 4B),
the
cutting
operation
to
tool
is
to
see that the
is
not
to
check "stacked
see
not dull
or
body
cracked. • Take
not
worn
"split"
circular
not
use
Split collars on split
recommended.
MACHINE POWER OFF
OUT
insure that you
to
operate tools that
to
the machine
mount
according to the
only
on the type
loads and operation
for
which the.tools were
don't
know this
your
supervisor.) Do
or
saw
of
the
or
in excess
MACHINE POWER OFF
OUT
position the
cut
is fully supported.
as
of
the machine and
is
done by
of
of
the machine
anti-kickback
or
foreign
"jogging"
of
as
they
ALL
cutting
stop their rotation
is
specifically
that purpose on the
through
all steps
3,
just above,
to
operate at
be
removed
of
Labor
(7)
minute"
or
the
full speed
for
at least one minute
before feeding material.
OPERATING SPEEDS FOR
CARBIDE TIPPED CIRCULAR
SAW BLADES
Carbide tipped
the types
machining
toughness and density range
wood species, composition boards,
medium hard plastics, and the softer
non-ferrous metals must never be
operated in excess
tool
manufacturer's recommenda-
or
tions,
to
standards,
(surface feet per minute) whichever is
lowest. Surface feet
refers
to
a
cutting
which the
rotating when the
This speed increases
diameter
spindle rpm increase. The maximum
speed
of
when the machinery being used
excellent operating
excellently maintained. When using
or
older
cutting
toughness'
per minute
both, should be reduced
where the tool cuts easily and freely
without
tooth impact shock. Most woods,
plastics and the medium-hard nonferrous metals will
longer tool life at surface feet per
minute ranging
6.
Toughness
material
of
breaking.
7. Density is the compactness
matenal compared
circular
commonly
of
used in the ·
materials typical
of
current
applicable OSHA
or
in excess
per
the peripheral
tool, that
outer
is,
cutting
the speed at
tool
and/or
motor
of
18,000 sfm is allowable only
condition
worn machinery,
materials
of
an
or
density'
or
material feed rate,
excessive vibration
cut
from
is
the resistance
to
being
a 'material
CHART
TVPICAL
SAWDIA.
(INCHES) RPM
•operation
generally
Note:
CHART
MAXIMUM
MAGNESIUM
15,000
SOFT & MEDIUM·
HARD
cut
to
resist tearing
A
18,000
ROTATING
OF
COMMERCIAL
(DO
NOT
ABOVE
MAXIMUM
6
11538'
7
8
10
12
14
16
18
20 3461
22
of
saw
result
Most
materials
the
maximum
B
RIM
CARBIDE
10,000
SFM
ALUMINUM
18,000
SFM
saw blades
of
the
of
most
the machinery
of
18,000 sfm
minute (sfm)
or
rim speed
teeth are
is at full speed.
as
the tool
arbor
or
is
and is
or
when
unusual
the surface feet
or
to
speeds
or
high
better with
8,000 sfm
to
orthestrength
of
to
its volume.
SFM
(SURFACE
SPEEDS FOR
OPERATE
9890'
8654.
6923.
5769.
4945.
4327•
3846.
3147
blades
in
poor
COPPER
CARBIDE
DESIGN,
CARBIDE
THE
RPM
SAWDIA.
!INCHES)
24
26
28
30
32
34
36
38
40
42
in
excess
tool
life
will
cut
better
RPM
rotating
SPEEDS,
IN
TIPPED
CIRCULAR
MATERIALS
LEAD
SFM
14,000
HARD, ANOOIZED
ALUMINUM
12,000
of
or
of
in
of
a
or
a
FEET
TIPPED
ROTATING
of
3600
and
cut
with
speed.
SURFACE
LISTED
SFM
SFM
16,000 sfm, depending on the
hardness and machining
characteristics
of
the material being
cut. As the rim speed (surface feet
per minute) of a circular saw blade
decreased, feed rates must
be
decreased accordingly to prevent the
of
forcing
material into the cutting
tool and overloading of the cutting
teeth.
of
The method
determining the
surface feet per minute (sfm) of a
rotary cutting tool
.26 x D x RPM = SFM
where 0 = diameter
RPM = rotating speed, In revolutions
SFM =
.26 =
is
as
follows:
ol
the tool
In
per
minute
rim
speed, In surface feet
per
minute
this
number
Inches
Is uaed to
to
IHI
(3.14
convert the tool circumference
from
by 12)
Remember that changing to a larger
diameter cutting tool at the same
or
machine spindle
arbor speed
increases the surface feet per minute
of
rim speed
assumptions
rpm since machines and individual
motors can be modified. WITHOUT
ANY
ON THE MACHINE, check the rpm of
each
Once the
motor
Chart A (following)
the tool. Never make
as
to any machine motor
CUTTING
motor
TOOLS MOUNTED
using
an
cutting
tool diameter and
rpm tachometer.
rpm are known, you can check
to
see
if a saw
blade will be operating within the
18,000 surface feet per minute
maximum rim speed specified. For
diameters not covered by Chart
the sfm (surface feet per minute)
formula above. For the circular sawing
of
magnesium, copper, lead, brass, or
bronze, note the LOWER surface
speed limitations on Chart
or
more
harder
difficult
B.
to cut
materials, consult the tool
manufacturer.
PER
MINUTE)
TIPPED
THICKNESS
CIRCULAR
SPEEDS SHOWN)
MAXIMUM
RPM
2885
2663
2473
2308
2163
2036
1923
1822
1731
1848
RPM
is
quality
.
longer
tool
FEET
SAW
BLADES
BELOW
UNDER
BRINELL
10,000
Note:
listed,
life
at
surface
speeds.
MAXIMUM
CIRCULAR
AND
SAWDIA. MAXIMUM
(INCHES)
not
recommended
life
at
PER
MINUTE
CUTTING
150
BRASS
SFM
Most
metals,
will
cut
speeds
below
feet
per
RPM
SAW
BLADES
GRADE
STANDARDS
SAW
BLADES
44
46
48
50
52 1331
54 1282
56
58
60
anQ
speeds
well
ISFM), FOR
THE
UNDER 150
BRINELL
12,000 SFM
including
better
with
the
maximum
minute
(sfm)
RPM
1573
1505
1442
1385
1236
1194
1154
will
below
BRONZE
those
longer
rim
tool
lnchu
dtwlded
A,
For
is
use
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