CTD N80X User manual

CTD MACHINES
2382 East 48th Street
Vernon, CA 90058
Tel [phone]  FAX [phone]
World Wide Web: http://www.ctdsaw.com
e-mail: [email protected]
05.2016
CTD MODEL NO:
CTD SERIAL NO:
MANUFACTURE DATE:
DISTRIBUTOR PURCHASED THROUGH:
(IF ANY)
INSTRUCTION BULLETIN
& MAINTENANCE MANUAL
FOR
CTD MODELS N80X & N90X

SUBJECT PAGE NO.
Machine Requirements......................................................................................................................... 2
Installation and Set-Up......................................................................................................................... 3
Electrical Installation............................................................................................................................ 8
Air Pneumatics.................................................................................................................................... 10
Safety Instructions............................................................................................................................... 12
How to Operate the Machine............................................................................................................... 12
Preventative Maintenance.................................................................................................................... 16
Repair and Service............................................................................................................................... 17
Spindle and Pivot Shaft Diagrams.......................................................................................................... 17
N80 Blade Guard and Stand Exploded View........................................................................................... 19
N80 Base Exploded View..................................................................................................................... 20,21
N90 Blade Gard and Stand Exploded View............................................................................................ 22
N90 Slide Exploded View...................................................................................................................... 23
N90 Splindle Exploded View.................................................................................................................. 24
Parts List............................................................................................................................................. 25,26
Machine Requirements:
MODEL NO:_____________ SERIAL NO:________________
Cutting Capacities
Staggered Saw Blade/Toe-Notch Configuration
Model N80X: 4-1/2” (114mm) x 4-1/2” (114mm) Deep x 3” (76mm) High
Model N90X: 16” (406mm) Blade Capacity; 6” (152mm) x 6” (152mm) Deep x 4” (102mm) High
18” (457mm) Blade Capacity; 7” (178mm) x 7” (178mm) Deep x 4” (102mm) High
Note: With special configuration up to a 7-1/4” (184mm) can be done.
Mitre Cutting/Staggered Saw Blades
Model N80X: 3-5/8” (92mm) Wide x 3” (76mm) High
Model N90X: 16” (406mm) Blade Capacity; 4-1/8” (105mm) Wide x 4” (102mm) High
18” (457mm) Blade Capacity; 5” (127mm) Wide x 4” (102mm) High
Mitre Configuration/Non-Staggered Saw Blades
Model N80X: 3-1/2” (89mm) Wide x 3” (76mm) High.
Capacities up to 5” (127mm) High with special blade guard modification at extra charge
Model N90X: 16” (406mm) Blade Capacity; 4” (102mm) Wide x 4” (102mm) High
18” (457mm) Blade Capacity; 4-3/4” (121mm) Wide x 4” (102mm) High
Capacities up to 6” (152mm) high with special blade guard modificaiton at extra charge
-2-

Electrical Requirements: Based on two motors per machine
Motor Load Amperes
Model No. Motor Size RPM 230 Volt 440 Volt
N80X 2 H.P., 3 Phase 3450 5.4 amps 2.7 amps
N80X 2 H.P. 1 Phase 3450 12.5 amps N/A
N80X 3 H.P., 3 Phase 3450 8.6 amps 4.3 amps
N90X 3 H.P., 3 Phase 1725 7.4 amps 3.7 amps
N90X 5 H.P., 3 Phase 1725 13.2 amps 6.6 amps
Pneumatic Requirements:
1 CFM per 10 strokes at 75 PSI (.043 cubic meters at 5.4 kg/cm2)
Dust Collection Requirements: 1200 CFM at 6” outlet
Cutting Tool Requirements: Heavy, rigid plate blades
13” blades: .110 to .120 plate; 16” blades: .120 to .130 plate; 18” blades: .130 to .140 plate
Installation and Set Up:
The Model N80X uses two 2 H.P. 3 Phase, 3450 RPM, 60 Hz TEFC Motors on a NEMA 56 Frame.
The Model N90X uses two 3 H.P. 3 Phase, 1725 RPM, 60 Hz TEFC Motors on a NEMA 182T Frame.
A disconnect switch is provided and the machine should be disconnected before blades are mounted, or at any time the
machine is serviced, or the blade is exposed. For motor protection against voltage fluctuations, a Dual Magnetic Starter
is provided as a standard feature. This starter protects the motor from overheating and will not allow the motor to
restart by itself after power outages. In addition, there is a safety interlock switch located under the blade guard. If the
blade is not locked down or in place, the machine will not start.
Space Requirements:
N80X N90X
-3-
IMPORTANT: Before operating saw, please be sure to read the “SAFETY INSTRUCTIONS TO THE
OPERATOR” (on Page No. 12).
Note: The floor stand must be shimmed, leveled and bolted to the floor or framed in to eliminate vibration.
Use holes provided in bottom of floor stand. All machines have been completely assembled at the factory,
then disassembled for shipment.

Blade Installation:
For both Model N80X & N90X: Before setting blades on spindle, disconnect power. Supply air to the machine so
that blades rise to the top of the stroke. Remove front blade guard by loosening side guard wing nuts or bolts and then
remove two top blade guard wing nuts. Lift guard off, exposing spindle.
1. Remove spindle nut and flange, using the 1-7/16” wrench provided or a large crescent wrench.
2. Place blades on spindle with tips pointing down. Blade must always rotate to the rear of the machine on the
underside of the blade (see Picture “A” on Page No. 5).
3. Replace flange and nut as before, and tighten (refer to Diagram No. “2” on Page No. 5).
4. If blades were purchased from CTD, your machine has been set with your blades marked “RIGHT” and
“LEFT” for Notching. If not, diameters vary. Follow special Instructions for Aligning Blades below. See
Diagram No. “1” on Page No. 5 for blade configuration. If notching, right blade must be directly below
left blade. If mitering, blades are set on the same plane and should be set for Miter Configuration (see page 5)
The blade must rotate down and to the rear of the machine on the underside of the blade (see Picture “A” on Page
No. 5). Your machine has been wired for the specified voltage at the time of your order. Note: You cannot change
the voltage without changing the starter. The motors have been connected to the starter.
Instructions for Aligning Blades on Model N90X:
Using an angle plate and the left blade as a reference point, touch the angle plate to the outside carbide tips of the blade.
Be sure the angle plate is square to the tips and not touching the plate of the blade. The tip of the right blade should
make very slight contact with the edge of the angle plate when rotated in the opposite direction (by hand) for
the notching configuration. For Mitre Configuration, set blades as shown in Diagram No. 1
1.To move blade forward (see Pictures “A” & “B”):
A. Loosen bolt “F” on the Motor Mount Bottom Angle, P/N 9M26 R or L (see Picture “B”, bottom rear of Slide).
B. Loosen and lightly snug four lock bolts marked “A” Top & Bottom located on P/N 9M28 R or L Spindle
Housing Mounting Plate. **Be careful not to loosen too much, as this will cause the mounting plate to cock
at an angle.
C. Loosen bolts “C”, top and bottom (4), located on Blade Adjustment Bar, P/N 9M38.
D. Loosen nuts only on bolts “B”,(4) top and bottom, located on Blade Adjustment Bar, P/N 9M38. Turn bolts
“B” to the right to move blade forward.
1. If blade is positioned correctly for Notching, when it is rotated by hand backwards, blade should make a
slight ticking sound against angle plate.
E. After blade has been adjusted;
1. Tighten nuts on bolts “B”, top and bottom (4)
2. Snug bolts “C”, top and bottom (4)
3. Firmly tighten four lock bolts “A”, top and bottom
4. Tighten bolt “F” on Motor Mount Angle, P/N 9M26 R or L
2. To move one blade backwards (see Pictures “A” & “B”)
A. Loosen bolt “F” on Motor Mount Angle, P/N 9M26 R or L (see Picture “B”, bottom rear of Slide).
B. Loosen and lightly snug four lock bolts marked “A” Top & Bottom (4) located on P/N 9M28 R or L Spindle
Housing Mounting Plate. **Be careful not to loosen too much, as this will cause the mounting plate to cock
at an angle.
C. Loosen nuts and bolts “B”, top and bottom (4), located on Blade Adjustment Bar, P/N 9M38
D. Turn bolts “C”, top and bottom (4) to the right and tighten to move blade backward.
1. If blade is positioned correctly for Notching, when it is rotated by hand backwards, it should make a slight
ticking sound against the angle plate.
E. After blade is adjusted
1. Snug bolts “B” (4) and tighten nuts
2. Firmly tighten four lock bolts “A”, top and bottom
3. Tighten bolt “F” on Motor Mount Angle, P/N 9M26 R or L
-4-

-5-
Diagram No. 1
Diagram No. 2
Blade
Flange
Spindle Nut
Spindle
Slinger
Spindle Housing
Notching Configuration
Mitre Configuration
Picture “A”
Picture “B”

-6-
Assembly of Tables and Gages for Mitering on Models N80X & N90X:
The floor stand must be shimmed and leveled, and if necessary, bolted to the floor to eliminate vibration. To connect
table or conveyor;
1. Assemble leg to table with nuts and bolts provided. The hole in the top of the table should be toward the
front and farthest away from the blade to attach fence support angle.
2. Attach Table, P/N BF17 to machine on angle bracket provided and level (see Diagram No. 3).
Belt Tension Adjustment for N90X (see Pictures “A” and “B” on Page No. 5):
1. Loosen bolt No. F on Motor Mount Bottom Angle, P/N 9M26 L or R, located at bottom rear side of Slide.
2. Loosen and snug four bolts marked No. D, Top & Bottom (Picture A) on Motor Mount Angle, P/N 9M26.
3. Loosen two nuts on bolts marked No. E on the top and bottom of Motor Mount Angle, P/N 9M26 L or R
(Picture B).
4. Turn bolts No. E to right to tighten tension, and to the left to loosen tension.
5. Re-tighten nuts on bolts No. E, and tighten four bolts marked No. D and bolt No. F.
Special Instructions for Moving Blades for Model N80X:
Use an angle plate and one blade as reference point. Touch
angle plate to outside tips of the left blade. Tip of right blade
should make slight contact with edge of angle plate in notching
configuration.
1. To move one blade forward or backward
A. Loosen four bolts marked No. A, Top & Bottom,
located on Spindle Housing, P/N 9A05.
B. Adjust bolts No. B, Top & Bottom, to move spindle
housing to desired settings--forward or backward.
C. Tighten four bolts marked No. A on Spindle housing.
If blade is positioned correctly for notching, when it
is rotated by hand backwards, it should make a slight
ticking sound against the angle plate.
Diagram No. 3
Belt Tension Adjustment for N80X:
The belt tension on the N80X is controlled by a spring loaded motor mount pivot plate. A compression spring is set
between two spring supports--one located through the Center Brace, P/N 8C40, and the other on the motor mount
pivot plate. The distance between the lip of the spring supports is approximately 4”.
Picture “C”

Toe Notching Fence Configuration:
Toe Notching Fences are easily adjusted for the depth
of the notch by loosening adjustment Handle,
P/N 9B7P38, and sliding keyed fences to desired
dimension by aligning pointer on the measuring tape.
Fences will always remain square to blades because
they are keyed to the table base.
Diagram No. “4”
Attaching Measuring System to Machine for Mitre Cutting on Models N80X and N90X:
(see specific instructions for the Measuring System purchased)
For: FEX, OMD, RAB, OMD/RAB Combination Gages, or PAS
1. Place long measuring gage (P/N 15BM223) on table with measuring tape facing up. Bolt through Front Fence
Angle, P/N 15M36R with 3/8-16 bolts provided. Adjust gage so measurement rule is correctly set
(see Diagram No. “5”);
A. With scale or ruler touching the side of the tips of the blade, measure a distance away from the blade. Be
sure the ruler and the tape on the fence gage read the same.
B. Adjust fence, left to right as necessary.
C. Both fences, left and right, must be in perfect alignment. Use a long straight edge for this purpose.
1. Take a two foot steel scale lying flat on table base. Butt edge forward against fences. Touch each outside
corner of scale. If one side pulls away from fence, then long fence is not in alignment with left fence
(see Diagram No. “4”). Adjust front fence angle (p/n 15M36L or R or long fence as necessary.
D. Attach fence support angle to fence and table (p/n 15F82)
2. If Rabbet Angle Assembly was purchased, place aluminum angle with slide into keyway.
(Rabbet Angle Assembly, P/N 15E85 is comprised of Slide,
P/N 15M80 & Rabbet Angle, P/N 15M85).
A. Move angle forward to front fence and square up.
B. When rabbet angle is square against front fence,
both measurement rules should read the same.
This may be visually deceiving. Use a 90 square
to check.
C. Adjust rabbet angle on slide as necessary by loosening
1/4-20 bolts on rabbet slide.
3. How to use Rabbet Gage:
A. Feed stick length with 45 mitre past right blade.
B. Slide aluminum angle under rabbet of wood moulding to
desired dimension.
C. Move outside stop to that point and lock stop with handle.
D. Slide rabbet angle back and cut.
Diagram No. “5”
Diagram No. “6”
-7-

-8-
Single Phase Motor Replacement:
Connect motor leads to T1 and T3 of overload relay for single phase motors. (See wiring diagram for single phase motors
on following page) Green ground wire must be grounded to enclosure. If using type “SO” wire and plug, use a dust tight
connector through Floor Stand and a grounded plug. Be sure to check rotation. If a change is necessary, open the motor
box located on the motor, and switch the #8 and the #5 wires. This reverses the rotation of a single phase motor. The
blade must rotate down and to the rear on the underside of the blade (see Picture “A” on Page No. 5).
Three Phase Motor Replacement:
Connect motor line leads to T1, T2, & T3 of the overload relays. (See wiring diagram for three phase motors.) Green
ground wire must be grounded to enclosure. Be sure to check rotation as polarities may be different. The blade must
rotate down and to the rear on the underside of the blade (see Picture “A” on Page No. 5). If a change in rotation is
necessary, reverse any two of the incoming power wires. Example: If the blades are running backwards and incoming
wires are connected White L1,Black L2,Red L3, switch the Black wire with the Red so that Black is connected to L3
and Red is connected to L2. This will change the blades to rotate properly.
Electrical Installation:
The CTD N80X uses two 2 H.P. single or three phase 3450 RPM, 60 HZ TEFC (totally enclosed fan cooled) motors on
a NEMA 56Z Frame. The N90X uses two 3 H.P. or 5 H.P. three phase 1725 RPM 60 HZ TEFC motors on a 182
Frame. CTD uses a speed up drive so that the blade will run at approximately 3400 RPM for the N80X and 2800 RPM
for the N90X..
Electrical installation should be performed by a qualified and certified electrician. A lock-out or disconnect switch is
located in front of the machine. It is a rotary switch to the left front of the machine. This disconnect switch is used to shut
off power to the machine and should be used whenever the blades are changed or at any time the machine is serviced and
the blades are exposed. A Dual Magnetic Starter, located inside the left side panel of the machine protects the motor from
overheating and will not allow the motor to restart itself after power outages or undervoltage situations. The START button
turns the motors “ON”. The STOP button turns the motor “OFF”. Note: The STOP button must be pulled out before
the START button will activate the motors. A safety interlock switch is located under the blade guard. The blade guard
must be in place and the safety interlock switch must be made or the motors will not turn on.
Electrical Installation of Power to Starter by a Qualified Electrician:
All wiring from the motors to the starter has been completed and tested at the factory several times.
The voltage has been clearly tagged. DO NOT CONNECT ANY VOLTAGE THAT IS DIFFERENT THAN
THE TAGGED VOLTAGE, AS THIS MAY CAUSE SEVERE DAMAGE AND DANGER.. CONSULT
FACTORY IF ANY CHANGES ARE NEEDED.
Bring incoming power lines to the rear of the machine on left side using hard wire and dust proof connectors. Attach
incoming power lines through Floor Stand to the rotary disconnect switch. Connect to terminals 2 & 4 for single phase
motors, and to terminals 2,4 & 6 for three phase motors. Always ground the green wire (See wiring diagram on Page No.
9). The blade must rotate down and to the rear on the underside of the blade (see Picture “A” on Page No. 5). If a
change in rotation is necessary, reverse any two of the incoming power wires. Example: If the blades are running
backwards and incoming wires are connected White L1,Black L2,Red L3, switch the Black wire with the Red so that
Black is connected to L3 and Red is connected to L2. This will change the blades to rotate properly.

-9-
Motor Load Amperes
Model No. Motor Size RPM 230 Volt 440 Volt
N80X 2 H.P., 3 Phase 3450 5.4 amps 2.7 amps
N80X 2 H.P., 1 Phase 3450 12.5 amps N/A
N80X 3 H.P., 3 Phase 3450 8.6 amps 4.3 amps
N90X 3 H.P., 3 Phase 1725 7.4 amps 3.7 amps
N90X 5 H.P., 3 Phase 1725 13.2 amps 6.6 amps
480 Volt Wiring Diagram
208 Volt Wiring Diagram

N80X & N90X Air/Pneumatic System:
The air pneumatic system on the N80X and N90X is simple to use and understand, and easy to operate. The main
components of the air system are shown below in the Air Circuit Piping Diagram. The system operates by depressing
the Foot Valve, P/N B3P71. This gives a signal to the main 4-Way Control Valve in the Foot Valve to change the
direction—allowing air to pass to the main drive Cylinder, P/N 8B3P26 for the N80X, and P/N 9B3P29 for the N90X.
This pushes the saw heads down. The speed of descent is controlled by the Speed Control Valve, P/N 9B3P65
(located at the exhaust ports of the foot valve). The saws reverse when the Foot Valve is released. This signals the 4-
way valve to change direction of air flow to the drive cylinder and the saw heads reverse. See Diagram No. 7 for
operational components.
Foot Valve:
The Foot Valve, P/N B3P71 actuates the saw heads downward. Once the foot valve is depressed, it must be held down.
The stroke or downward movement of the saw heads can be reversed at any time by releasing on the foot pedal. Since
the Foot Valve rests on the floor, it is important to clean it regularly, as debris from cutting can make its way into the valve,
causing improper function. Do not maintain pressure on the Foot Pedal once the blades have cut through the material, as
the saw cannot reverse.
Speed Control of Blades Movement:
The downstroke speed of the blades is controlled by the Speed Control Valve, P/N 9B3P65 located in Port “3 ” or “S”.
The upstroke speed is controlled by the Speed Control Valve, P/N 9B3P65 located in Port “5” or “R”. Both Speed
Control Valves are located on the main 4-way Foot Valve.
-10-
Diagram No. 7 Air Circuit Piping for Models N80X & N90X
Air Supply—The air supply must be turned off and all electrics disconnected before making adjustment on the power
feed. A working pressure of 75 PSI (5.4kg/cm2) is required. An industrial-type compressor of at least 3 CFM (.085
cubic meters) is recommended. An additional 3 CFM (.085 cubic meters is required for Sawblade Lubrication System.
A conveniently located valve should be supplied by the user to shut off the air line.

-11-
FR—An Air Filter/Regulator is installed ahead of the air inlet to the machine. This system helps
prevent foreign matter from entering the system. The FR is comprised of two different components.
1. The Air Filter Bowl is located on the left side and is provided with an automatic drain. This collects and
then releases foreign matter and condensation collected by the air filter.
2. The Pressure Regulator, which is located on top of the air filter, controls the amount of air pressure allowed
into the system. An operating pressure of 75 PSI is required. (This is set at the factory.)
Air Hold Down Clamps for the Material:
Both Horizontal and Vertical Air Clamps are available and can be purchased as an optional accessory. These clamps
pneumatically hold the material in place when the saw blades are cutting the material. If clamps are not purchased, the
operator MUST HAND HOLD THE MATERIAL. The clamps are controlled by a 3-Way Normally Open Valve, P/N
B3P50 mounted on the top of the brace. When the machine is in the rest position, the slide contacts the 3-Way Valve,
P/N B3P50. As soon as the Power Feed is tripped by the Foot Valve, the 3-Way Valve is released to actuate the clamps.
A manual Shut-Off for the clamps is provided from the factory.
Trouble Shooting the Pneumatic System for the N80X & N90X Cut-Off Saw:
If there is no control over the power feed stroke:
A. Replace either the Upstroke Flow Control Valve, or the Downstroke Control Valve P/N 9B3P65. Another
possible cause are bad seals in the air cylinder. Listen for any air leakage and replace if necessary.
B. If machine will not start a cycle, or will not reverse, check the 4-Way Foot Valve, P/N B3P71. To do this, depress
the pedal. Listen for the valve to bleed air out of the line, or any air leak. Also, check for any mechanical binding.
Disconnect electricity and air supply from the machine. Manually move saw slide down and up to check for
binding of the slide or feed mechanism. If machine is bound up, clear the blockage.
Air Filter/Regulator

Safety Instructions to the Operator:
1. KNOW YOUR CTD SAW. Read this instruction manual carefully. Learn the operation, application, and
limitations, as well as the specific potential hazards peculiar to this machine.
2. Avoid accidental starting. Make sure switch is OFF before plugging in power cord. A Dual Magnetic
Starter is provided to give the operator added protection.
3. Always use a plug equipped with a ground.
4. Always keep blade guard in place. Do not wire-up or chain-up, so that blade is exposed.
5. Be sure all unnecessary tools are removed from machine before turning on power.
6. Use safety goggles. Also use a face or dust mask if operation is dusty.
7. Support work. To maintain control of work at all times, it is necessary that material be level with cutting
surface.
8. Wear proper apparel. Do not wear loose clothing or jewelry. Do not wear a tie or gloves. These items
can get caught in the moving parts of the machine.
9. Do not over-reach. Keep your proper footing and balance at all times.
10. Maintain your machine in top condition. Use proper blades. Clean machine weekly for proper maintenance.
11. Keep work area clean. Cluttered areas, benches and slippery floors invite accidents.
12. Avoid dangerous environments. Keep work area well illuminated.
13. Wear ear protection if exposed to long periods of very noisy shop operations.
14. Keep visitors away. All visitors should be kept a safe distance from work area.
15. Do not force the machine. The saw will do a better job and be safer to operate at the speed for which it
was designed. Forcing the saw can be very hazardous to the operator.
16. Use recommended accessories. Use of other accessories may be hazardous. Use this instruction manual
or consult CTD for the proper accessories available.
17. Do not drown the blade using a steady stream of coolant when cutting non-ferrous materials. Only spray the
work to cool it.
18. Be sure to use the proper blade for the particular material to be cut.
19. Disconnect power cord before adjusting, servicing, and before changing belts, or for installing
accessories.
20. Safety is a combination of operator COMMON SENSE and ALERTNESS at all times when the machine
is being used.
21. WARNING!!! DO NOT ALLOW FAMILIARITY (GAINED FROM FREQUENT USE OF YOUR SAW)
TO DULL YOUR AWARENESS!! ALWAYS REMEMBER THAT A CARELESS FRACTION OF A
SECOND IS SUFFICIENT TO INFLICT SEVERE INJURY!!
-12-
How to operate the N80X & N90:
Before operating the machine, please read the “SAFETY INSTRUCTIONS TO THE OPERATOR” above. Other
important information and features need to be learned before operating the machine.
Rotation:
Both blades must rotate to the rear of the machine on the underside of the blades (see Picture “A” on Page No. 5).
Blade Guard:
It is important that the Finger Guards, P/N 20F180 for mitering, or the lower adjustable Front Guard
P/N 9F65 for Toe Notching, are adjusted to completely cover the blade. The finger-guards, attached to the
main blade guard, should be positioned around the material to give maximum operator protection.
The main blade guard can be removed by loosening the wing nuts on top of the guard and setting aside. Also
loosen wing nuts located at the front and sides of the blade guard. The main blade guard will now lift off the machine.
After changing blades, replace blade guard. Be sure to provide clearance between the blade guard and the top of
the blade at the top of the stroke. If the blade guard is not set in place properly, the motors will not turn on. An
interlock switch located below the blade guard must be contacted before power is supplied to the starter.

Mitre Cutting: (see Diagram No. 8)
A fixed Double Mitre Saw, such as the N80X and N90X operates by making two 45 cuts at one time. The machine
“V” notches the piece of material between the two blades. To make the first cut on a stick length;
1. Feed the material to the centerline of the machine so that ONLY the left blade makes a trim cut. Be careful
not to overfeed beyond the centerline of the machine, as the piece can be hit with the right blade, possibly
throwing the unclamped piece into the saw blade causing damage.
2. After making the trim cut, feed the material (now with a 45 mitre cut) to the stop at the desired length.
If using a Rabbet Gage, slide angle under rabbet of moulding and move moulding to desired dimension.
Move outside stop to same position and lock (see Diagram No. 8).
3. Continue to feed length to stop as above, and make double mitre cuts until length is used.
4. RULE OF DOUBLE MITRE CUTTING—If the piece to be cut cannot be held on both sides of the blade,
do not cut it!!!
5. Be sure to release foot pedal as soon as saws have cut through the material. This eliminates the blade hitting the
material twice. Minimum cut length on the N80X and N90X is 5” on the point to point dimension.
Consult factory for shorter lengths.
-13-
This label is attached to the blade guards.
NEVER PUT HANDS OR FINGERS NEAR OR UNDER
THE MOVING BLADE!!
Use a piece of wood to remove short pieces from saw.
Diagram No. 8
Diagram No. 9

-14-
Cutting Speed:
The blade is rotating at approximately 3400 RPM for the N80X and 2800 RPM for the N90X. When moving the
blade through the material, the blade must NEVER be allowed to dwell in the work. If fine finishes are required;
1. Use a sharp blade.
2. Use a constant, even pressure when cutting through material.
Clamping and Work Slippage:
The work must never be allowed to move or vibrate as it is being cut. When the work is positioned against a stop, it must
be clamped either by hand holding or by pneumatic air clamps. Never allow unclamped work between the blade and the
stop, as the blade can grab the material and throw it—thereby causing damage to the blade, the machine, and possibly
harming the operator. CTD offers both Horizontal and Vertical Clamps. The Horizontal Clamp pushes the material for-
ward against the front fence. Vertical Clamps hold the material down, against the table base. Both clamps are offered as
optional extras and are highly recommended. The clamps are actuated at the same time as the saw heads by depressing the
Foot Valve.
Check your material for squareness, using a 90 square. Material that is out of square will move when it is cut, thereby
causing irregular mitres. See “IRREGULAR MITRES”, Page No.17 . Additional tooling may be needed. Consult factory
for information.
Vertical Air Clamps:
Vertical Air Clamps should be installed on the Model N80X and N90X to hold material securely. They are controlled by
a 3-Way Valve mounted above the right motor on the N90X, and above the slide on the N80X. When the machine is in
the rest position, the 3-Way Valve shuts the air supply to the clamps. The clamps are actuated at the same time as the
blades by depressing the foot valve. The work must never be allowed to move or vibrate as it is being cut. When work
is positioned against a stop, it must be clamped. NEVER allow unclamped work between the blade and the stop.
Cutting Wood:
While wood is generally soft and simpler to cut than aluminum, it requires that the material be held in place as the blades
pass through the material. CTD suggests using a Carbide Blade with an Alternate Top Bevel (ATB) for lighter wood
sections and picture frame mouldings. This type of blade gives the finest of finishes. No ONE blade will cut all material
perfectly. High lacquers or mica mouldings require a special modified blade for best results. Consult factory. Never use
a wood blade to cut aluminum, as it will chip and fracture the carbide tips of the blade.
Vertical Clamp Assy.

-15-
Cutting Plastic:
Plastic can be cut as easily as wood on the N80X and N90X models. However, because of its elastic properties, the
material can deflect as the blades pass through. Therefore it is important to clamp the material as close as possible to the
blade and support it by use of fixtures. CTD offers special 45Horizontal Clamps for this application (see above).
Additional tooling may be required. CTD offers special modified blades for cutting plastics.
Cutting Aluminum:
As with cutting any material, it is important that aluminum be clamped properly. Precision blades are required for accurate
cutting. CTD suggests and uses a Triple Chip Grind on all its non-ferrous Carbide Blades. When cutting aluminum, or
other non-ferrous materials, it is essential that the blades be lubricated with a Spray Lubrication System or other blade
lubricating system for the finest finish. See SAWBLADE LUBRICATION SYSTEM below for more details.
Combination Blades:
Any combination blade is basically an aluminum cutting blade. Significant blade life in between sharpenings will be lost if a
blade is used for cutting both aluminum and wood. The amount of production for either wood or aluminum should be the
determining factor in the assessment of the particular blade type to be used. Please consult factory.
Sawblade Lubrication System:
The Sawblade Lubrication System is used when cutting aluminum or other non-ferrous material . This system normally
uses a Water Soluble Oil mixture of 10 parts water to one part oil. The system operates by siphoning the lubrication up
the line to the nozzle. Any air leak will cause inconsistent fluid flow to the nozzle.
BE SURE your fluid is free from chips and other debris. A fluid container supplied with the machine contains a One-Way
Check Valve, Part No. B3P96 at the end of the clear fluid line. This check valve helps to hold the lubrication in the line.
However, after a couple of minutes the lubrication or oil will back-flow into the container. Priming of the system may be
necessary ( by holding Foot Pedal down for 30 seconds), if the machine has been standing without use. The system may
be shut off by closing the toggle valve next to the vacuum pump. The fluid must be clean or the vacuum pump will clog.
CTD Bio Lubrication System:
The CTD biodegradable lubrication system operates by pulse spraying a minute amount of biodegradable lubricant
directly on to the saw tooth of the blade in time-measured increments. The majority of the lubricant then dissipates with
the heat of the cutting action. Chips coming off the blade are hot and dry, and are more easily collected (see specific
instructions included with system).

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Length of Stroke Adjustment:
The N80X and N90X are unique in that the travel of the air cylinder can be adjusted to eliminate extra blade movement.
By adjusting the upstop bumper located above the Slide, P/N 9A06 for the N90X, and P/N 8C01 for N80X, the
blades will be lowered closer to the work. This eliminates wasted motion and time, thereby increasing production.
Always provide a safe distance between the blade and the work. Re-adjust the Lower Blade Guards, P/N 9F65 or the
Finger Guard, P/N 20F180 whenever blades are lowered to make sure blades are completely covered.
Scrap:
The N80X & N90X operate by making two 45 mitres at the same time. A “V” shaped piece is removed and falls
into the scrap chute located on the right hand side of the machine. A scrap box should be supplied to collect the scrap
pieces. To minimize scrap, make sure blades are set close together as shown in Diagram 1 on Page No. 5. Also
see “BLADE INSTALLATION” on Page No. 4. Generally, you will loose between 3/8” (9mm) to ½” (13mm) of
scrap material.
Preventative Maintenance:
The N80X & N90X are relatively easy machines to operate and maintain. On the next page is a weekly check list of
general maintenance items. The best preventative maintenance advise is to CLEAN THE MACHINE DAILY, espe-
cially around the pivot points on the machine.
Lubrication and Adjustments of Bearings:
NO LUBRICATION OR ADJUSTMENTS ARE REQUIRED. All CTD cut-off saws are assembled using
sealed, prelubricated ball bearings. The spindle and pivot assemblies are constructed using preloaded belleville springs.
These springs eliminate the need for adjustments of bearings and also greatly increase the life of these bearings.
Irregular Mitres:
Irregular mitre cuts are almost always caused by out-of square material. Check your material with a 90 square and a
straight edge. Material that has a high spot on the bottom, will move or roll forward as it is being cut (even with pneumatic
hold down clamps), thereby causing the blade to cut more on the inside of the moulding than the outside. Another cause of
irregular mitre cuts is too thin a plate thickness on blades. Blade plate thickness should be .120 to .130 on 16” blades, and
.110 to .120 on 13” blades. Blades will find the easiest avenue to cut through material, and sometimes the blade plate will
distort when cutting heavier sections. The drawing below is an example of a cut when blade plate is too thin for the material
being cut.

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N80X and N90X Spindle Assembly Parts
1. 90M01L N80X or N90X Spindle, Left
90M01R N80X or N90X Spindle, Right
2. 8M03 N80X Flange
90M03 N90X Flange
3. 8M02 N80X Slinger
90M02 N90X Slinger
4. 9B2P04X Double Row Bearing
5. 9B2P06 Snap Ring
6. 2B4P27 Spindle Pulley 3”, .787 bore
7. 2BM23 Pulley Key
8. 9B2P05 Belleville Springs (4 required)
9. 151P16L Jam Nut, Left
151P16R Jam Nut, Right
10. 9B2P03 Bearing, Jam Nut side
11. 8B4P38 3VX450 N80X Drive Belt Banded
(2 required)
9B4P35 3VX375 N90X Drive Belt (4 required)
( for 3 H.P. motors)
9B4P36 3VX400 N90X Drive Belt (4 required)
( for 5 H.P. motors)
12. 9A05 Spindle Housing
13. 9B1P44L Spindle Nut, Left
9B1P44R Spindle Nut, Right
General Maintenance Check List:
Always disconnect electrical power and air supply.
1. Keep machine clean—especially around the moving parts of the machine.
2. Blow off and clean;
A. Around air cylinder.
B. Linear rods and bearings.
C. Spindle Housing
3. Check Air Filter Bowl for water and condensation build up.
4. Remove any scrap pieces and dust build up from inside floor stand cabinet.
5. Check monthly:
A. For excessive belt wear.
B. Make sure motor pulley set screws are tight.
Repair and Service:
Always use CTD factory authorized replacement parts and consult factory before making any repairs or
adjustments which may be unclear.

For Model N80X:
A. Remove Blade Guard Cover, P/N 8F10 bolted to base and brace.
B. Push motor forward and remove belts from pulley.
4. Remove hex cap screws with wrench and detach Spindle Housing, P/N 9A05 from Mounting Plate (N90X), or
Slide (N80X) [See Pictures “A”, “B” and “C” on Page Nos. 5 and 6].
5. Using a vise with aluminum jaws, hold slinger and loosen jam nut No. 9, but leave jam nut on spindle.
6. Loosen set screws in pulley.
7. With jam nut on end of spindle thread (to protect threads), gently tap jam nut toward slinger side using a lead or
rubber mallet. The spindle assembly will begin to move out of the spindle housing. Remove jam nut when assembly is
almost out. Spindle assembly consisting of Spindle No. 1, Slinger No. 3 and Bearing No. 4 will come out of housing.
Pulley No. 7 will slide out of housing when spindle assembly is removed. Bearing on jam nut side will slide out of
housing.
8. Replace bearings or belts as necessary.
9. Bearing on blade side is a press fit on spindle. If bearing on the blade side must be replaced, a puller must be used
to disassemble the bearing from the spindle.
10. Press new bearing No. 4 on to spindle, making sure spindle is square to the bore.
11. To re-install spindle in spindle housing, take Spindle
No. 1 (with Slinger No. 3 and Bearing No. 4), and slowly insert into housing.
12. Position Pulley No. 7 in center of housing. Place Key No. 7 in broached keyway in spindle. Position belts around
pulley, through housing. Push spindle through pulley, and through opposite wall of spindle housing.
13. From jam nut side of housing, place Belleville Springs No. 8 into housing. Be careful they are inserted correctly as
shown in diagram.
14. Now, push bearing No. 10 into housing and on spindle, being careful that bearing goes into housing square.
15. Replace jam nut No. 9 on spindle threads. Holding slinger No. 3 in vise, slowly tighten jam nut. This will cause
bearing to slowly push into housing. Tighten thoroughly until bearing bottoms out on shoulder of spindle.
16. Tighten set screws in pulley.
17. The face of Slinger No. 3 must be checked with a dial indicator to make sure it is running true. If it is not, it should
be refaced. To reface, use the side of a surface grinding wheel. Dress the face of the slinger by rotating spindle in
bearings slowly against the direction of the grinding wheel.
18. Replace housing on spindle Plate (N90X), or Slide (N80X) with four hex cap screws.
19. Place belts around motor pulley and tighten (see Belt Tension instructions on Page No. 6 for N90X).
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Refer to Spindle Assembly Diagram on Page No. 17
For Model N90X:
1. Remove front Blade Guard, P/N 9F20 ( see Instructions under Blade Installation on page 4)
2. Remove rear Motor Cover, P/N 9F52 exposing motors.
3. Loosen belts by following instructions under Belt Tension on Page No. 6.
N80X & N90X Spindle Assembly and Bearing Installation Instructions:

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N80 Exploded View
Notching Configuration