Northern Industrial Tools 338070 User manual

6IN. CUTOFF SAW
OWNER’S MANUAL
WARNING:
Read carefully and understand all ASSEMBLY AND OPERATION
INSTRUCTIONS before operating. Failure to follow the safety rules and other
basic safety precautions may result in serious personal injury.
Item# 338070

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Thank you very much for choosing a NORTHERN Industrial product! For future reference, please
complete the owner's record below:
Model: _______________ Purchase Date: _______________
Save the receipt, warranty and these instructions. It is important that you read the entire manual to
become familiar with this product before you begin using it.
This machine is designed for certain applications only. The distributor cannot be responsible for
issues arising from modification. We strongly recommend this machine is not modified and/or used
for any application other than that for which it was designed. If you have any questions relative to a
particular application, DO NOT use the machine until you have first contacted the distributor to
determine if it can or should be performed on the product.
For technical questions please call 1-800-222-5381.
INTENDED USE:
This 6in. CUTOFF SAW is designed for cutting metal.
TECHNICAL SPECIFICATIONS:
Motor:
120V ~ 60Hz 780W 6.5AMPS
No Load Speed:
7400 RPM
Blade Type:
6in. Diameter reinforced Cutting Disc
Packed Weight:
11.5 lbs.
CSA Listed:
GENERAL SAFETY RULES
WARNING: Read and understand all instructions. Failure to follow all instructions listed
below may result in electric shock, fire and/or serious injury.
CAUTION: Do not allow anyone to operate or assemble this Cutoff Saw until they
have read this manual and have developed a thorough understanding of how the Cutoff Saw
works.
WARNING: The warnings, cautions, and instructions discussed in this instruction
manual cannot cover all possible conditions or situations that could occur. It must be
understood by the operator that common sense and caution are factors which cannot be built into
this product, but must be supplied by the operator.
SAVE THESE INSTRUCTIONS

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IMPORTANT SAFETY CONSIDERATIONS
Make sure the cutoff wheel is securely mounted as described in the assembly instructions,
BEFORE connecting the tool to a power supply. Do not tighten wheel excessively, since this
can cause cracks.
Check wheel for fissures and cracks, and test for normal operation prior to use.
Use only 6in. cutoff wheel rated for 10,000 RPM or greater and manufactured in compliance
with ANSI B7.1. Always store wheels in a dry place with little temperature variation.
Always ease the abrasive wheel against the workpiece when starting to cut. A harsh impact can
break the wheel.
Always press the trigger switch and allow the cutoff wheel to reach full speed before cutting.
Because of the downward cutting motion, stay alert to keep hands and fingers away from the
path that the blade travels.
Never replace the abrasive wheel with a toothed blade.
CUTOFF SAW USE AND CARE
Do not modify the Cutoff Saw in any way. Unauthorized modification may impair the function
and/or safety and could affect the life of the equipment. There are specific applications for which
the Cutoff Saw was designed.
Always check of damaged or worn out parts before using the Cutoff Saw. Broken parts will
affect the Cutoff Saw operation. Replace or repair damaged or worn parts immediately.
Store idle Cutoff Saw. When Cutoff Saw is not in use, store it in a secure place out of the
reach of children. Inspect it for good working condition prior to storage and before re-use.
ASSEMBLY
WARNING! Do not connect saw to power source until assembly is complete. Failure to
comply could result in accidental starting and possible serious injury.
CUTOFF WHEEL REMOVAL
1. Make sure saw is unplugged and in the "OFF" position.
2. Pull out the locking pin (16) and raise the saw to its full open position.
3. Using a Phillips head screwdriver, remove the inner blade guard cover screw (88).
4. Swivel the outer blade guard (91) up to reveal the hex
head bolt (66) as shown in Figure 1.
5. Place the pins of the supplied flange wrench into the
holes in the outer flange (64) and hold the outer flange
steady.
6. Using the supplied blade arbor wrench, remove the hex
head bolt by turning it counterclockwise.
7. Remove outer flange washer (65) and outer flange.
8. Remove cutoff wheel (81).

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CUTOFF WHEEL INSTALLATION
WARNING! Use only reinforced, 6in. cutoff wheels, rated for 10,000 RPM or higher.
1. Disconnect saw from the power source.
2. Inspect the replacement wheel for defects such as cracks, chipping, and correct speed rating.
If defects are found or the speed rating is not 10,000 RPM or higher, discard the wheel and
choose another wheel that fits the proper specifications.
3. Remove any debris from the inner flange (63).
4. Position the new cutoff wheel against the inner flange.
5. Align the outer flange with the wheel arbor, then slide it onto the arbor until it rests flush against
the cutoff wheel.
6. Place the outer flange washer against the cutoff wheel.
7. Insert the hex head bolt into the threaded end of the wheel arbor and hand tighten.
8. Insert the pins of the flange wrench into the holes of the outer flange and hold the outer flange
steady.
9. Using the blade arbor wrench, firmly tighten the hex head bolt in place.
WARNING! Do not overtighten the hex head bolt. Overtightening can cause the new wheel
to crack, resulting in premature failure and serious personal injury.
10. Swivel the outer blade guard back to its original position, making sure that the guard cover pivot
(74) slides back into the guide arm (79). (See Figure 2)
11. Align the hole in the inner blade guard cover with the
hole in the inner blade guard.
12. Insert the inner blade guard cover screw through the
inner blade guard cover, into the inner blade guard.
13. Using a Phillips head screwdriver, firmly tighten the
inner blade guard cover screw.
ADJUSTMENTS
WARNING! Always make sure the tool is switched off and unplug the saw from power
source before making adjustments or performing routine maintenance. Failure to heed this warning
can result in serious personal injury.
ADJUSTABLE STATIONARY VISE
The adjustable stationary vise is located on the base of your cutoff saw. This vise can be adjusted
for cutting angles from 0 to 45 degrees.
CUTTING ANGLE ADJUSTMENT
To adjust the angle of cut:

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1. Using the supplied allen wrench, loosen screws (26) behind the vise fence (23).
2. Rotate the vise fence until the desired angle of cut is aligned with the indicator arrow in th saw
base (14).
3. Check the angle of the vise fence to the cutoff wheel using a protractor, bevel square, or similar
device.
4. Using the supplied allen wrench, securely tighten the bolts holding the vise to the saw base.
QUICK LOCK/RELEASE VISE
The cutoff saw is equipped with a quick lock/release vise system as standard equipment.
With this feature you are able to open and close the vise quickly without excessive turning of the
vise adjustment handle.
USING THE QUICK LOCK/RELEASE VISE
To loosen:
1. Slightly release tension on the Vise (06) by rotating the vise adjustment handle (01)
counterclockwise 1/2 to 1 turn.
2. Lift up the quick Lock/release lever (13) and pull back on vise adjustment handle to slide open
the vise.
To tighten:
1. Push the vise adjustment handle forward to slide the vise against the workpiece.
2. Push down on the quick Lock/release lever to engage its threads with the vise adjusting screw
(03).
3. Rotate the vise adjustment handle clockwise to tighten the vise against the workpiece.
OPERATION:
To start the saw
1. Press the safety on/off button located on the left side of the saw housing (38).
2. While holding the safety on/off button, pull the trigger (49).
To stop the saw
1. Release the trigger completely.
CUTTING
WARNING! Do not attempt to cut wood or masonry with this saw. Never cut magnesium or
magnesium alloy with this tool. Failure to comply with this warning could result in serious personal
injury.
WARNING! If wheel stops during operation, makes an odd noise or begins to vibrate,
switch off the tool immediately.
WARNING! Large, circular, or irregularly shaped material may require additional means of
clamping to be secured in place adequately for cutting. Use C-clamps and blocks to hold material
securely. Failure to comply could result in serious personal injury.

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1. Firmly secure the material to be cut using the saw’s vise.
2. Start the saw by pressing safety on/off button and pulling the trigger.
Note: Allow the cutoff wheel to come up to full speed before contacting wheel to material.
3. Slowly push down on the saw arm handle until the cutoff wheel contacts the material being cut.
Use a steady and even pressure to obtain a uniform cut. Never force the wheel into the material.
4. When the cut is complete, release the trigger switch and allow the wheel to stop completely
before raising it to the full open position.
DANGER! Do not touch the cut material until it cools or you will be burned. Failure to heed
this warning will result in serious personal injury.
MAINTENANCE
•Maintain your Cutoff Saw. It is recommended that the general condition of any Cutoff Saw be
examined before it is used. Keep your Cutoff Saw in good repair by adopting a program of
conscientious repair and maintenance. Have necessary repairs made by qualified service
personnel.
WARNING! Make sure this saw is turned off and disconnected from its power source
before attempting any maintenance, cleaning, or inspection.
•Maintain your tools. It is recommended that the general condition of any tool be examined
before it is used. Keep your tools in good repair by adopting a program of conscientious repair
and maintenance in accordance with the recommended procedures found in this manual. If any
abnormal vibrations or noise occurs, turn the tool off immediately and have the problem
corrected before further use. Have necessary repairs made by qualified service personnel.
•Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting
edges are less likely to bind and are easier to control. Keep handles dry, clean, and free from oil
and grease.
Your cutoff saw is designed to perform with little or no maintenance required from you. To help
prolong the life of your tool, follow the simple maintenance routine below:
1. Keep your tool clean. Periodically wipe your tool down with a damp rag and blow out air
vents with compressed air.
Note: Do not allow moisture inside the saw when cleaning.
2. Regularly check screws and bolts to make sure they are properly tightened.
3. Apply dry lubricant monthly to the points listed below to extend saw service life.
Lubrication points:
• Vise Adjusting Screw
• Vise Swivel Pin
4. Remove the brush caps at regular intervals to check the carbon brushes. When the
brushes are worn, replace them. (see below two images)

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This cutoff saw has a quick brush change system.
1. Use slotted screwdriver to remove the the brush caps.
2. Take out the worn brush and insert the new one.
DIAGRAM & PARTS LIST

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For replacement parts and technical questions, please call 1-800-222-5381.

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WARNING
Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains
chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.
Some examples of these chemicals are:
• lead from lead-based paints,
• crystalline silica from bricks and cement and other masonry products, and
• arsenic and chromium from chemically-treated lumber.
Your risk from 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, and work with approved safety equipment,
such as those dust masks that are specially designed to filter out microscopic particles.
Distributed by
Northern Tool + Equipment Company, Inc.
Burnsville, Minnesota 55306
Made in China