GRABBER GR871 Instruction Manual

GR871
14" (355 mm) Heavy Duty Chop Saw
Scie fendeuse de 355 mm (14 po) et de service intensif
Cortadora de metales de 355 mm (14")

INSTRUCTION MANUAL
GUIDE D'UTILISATION
MANUAL DE INSTRUCCIONES

INSTRUCTIVO DE OPERACIÓN, CENTROS DE SERVICIO Y PÓLIZA
DE GARANTÍA. ADVERTENCIA: LÉASE ESTE INSTRUCTIVO
ANTES DE USAR EL PRODUCTO.

GRABBER

®

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IF YOU HAVE ANY QUESTIONS OR COMMENTS ABOUT THIS OR
ANY GRABBER TOOL, CALL US TOLL FREE AT:

1-800-477-

TURN (1-800-477-8876)

TRIGGER SWITCH

FENCE

VISE LEVER

CRANK

WHEEL
GUARD

WHEEL

VISE

CARRY

HANDLE

LOCK

DOWN PIN

WHEEL LOCK LEVER

BASE

HEX

WRENCH

WARNING: FOR YOUR OWN SAFETY READ INSTRUCTION

MANUAL BEFORE OPERATING CHOP SAW.

Important Safety Instructions

WARNING! Read and understand all instructions. Failure to

follow all instructions listed below may result in electric shock, fire
and/or serious personal injury.

SAVE THESE INSTRUCTIONS

• KEEP GUARDS IN PLACE and in working order.

• REMOVE ADJUSTING KEYS AND WRENCHES. Form habit of

checking to see that keys and adjusting wrenches are removed
from tool before turning it on.

• KEEP WORK AREA CLEAN. Cluttered areas and benches invite

injuries.

• 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.

• KEEP CHILDREN AWAY. All visitors should be kept at a safe dis-

tance from work area.

• MAKE WORKSHOP KID PROOF with padlocks, master switches,

or by removing starter keys.

• DON’T FORCE TOOL. It will do the job better and safer at the rate

for which it was designed.

• USE RIGHT TOOL. Don’t force tool or attachment to do a job for

which it was not designed.

• USE PROPER EXTENSION CORD. Make sure your extension

cord is in good condition. When using and extension cord, be sure
to use one heavy enough to carry the current your product will
draw. An undersized cord will cause a drop in line voltage resulting
in loss of power and overheating. The following table shows the
correct size to use depending on cord length and nameplate
ampere rating. If in doubt, use the next heavier gage. The smaller
the gage number, the heavier the cord.

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Minimum Gage for Cord Sets

Volts Total Length of Cord in Feet

120V 0-25 26-50 51-100 101-150
240V 0-50 51-100 101-200 201-300

Ampere Rating

More Not moreAmerican Wire Gage
Than Than
0- 6 18 16 16 14
6 - 10 18 16 14 12
10 - 12 16 16 14 12
12 - 16 14 12 Not Recommended

• WEAR PROPER APPAREL. Do not wear loose clothing, neckties,

rings, bracelets, or other jewelry which may get caught in moving
parts. Nonslip footwear is recommended. Wear protective hair cov­ering to contain long hair.

• ALWAYS USE SAFETY GLASSES. Also use face or dust mask if cut-

ting operation is dusty. Everyday eyeglasses only have impact resistant
lenses, they are NOT safety glasses.

• SECURE WORK. Use clamps or a vise to hold work when practical.

It’s safer than using your hand and it frees both hands to operate tool.

• DON’T OVERREACH. Keep proper footing and balance at all times.

• MAINTAIN TOOLS WITH CARE. Keep tools sharp and clean for best

and safest performance. Follow instructions for lubricating and chang­ing accessories.

• DISCONNECT TOOLS before servicing; when changing accessories,

such as blades, bits, cutters, and the like.

• REDUCE THE RISK OF UNINTENTIONAL STARTING. Make sure

switch is in off position before plugging in.

• USE RECOMMENDED ACCESSORIES. Consult the instruction man-

ual for recommended accessories. The use of improper accessories
may cause risk of injury to persons.

• NEVER STAND ON TOOL. Serious injury could occur if the tool is

tipped or if the cutting tool is unintentionally contacted.

• CHECK DAMAGED PARTS. Before further use of the tool, a guard or

other part that is damaged should be carefully checked to determine 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.

• DIRECTION OF FEED. Feed work into a blade or cutter against the

direction of rotation of the blade or cutter only.

• NEVER LEAVE TOOL RUNNING UNATTENDED. TURN POWER
OFF. Don’t leave tool until it comes to a complete stop.

• REPLACEMENT PARTS.

When servicing

use only identical

replacement parts.

• TO REDUCE THE RISK OF ELECTRIC SHOCK, this equipment has a
polarized plug (one blade is wider than the other.) This plug will fit in a
polarized outlet only one way. If the plug does not fit, contact a qualified
electrician to install the proper outlet. DO NOT CHANGE THE PLUG IN

ANY WAY.

Additional Safety Rules for Chop Saw

• Always wear safety goggles or other eye protection when using this tool.

• Before using, inspect each cutting wheel for cracks or flaws. If a crack
or flaw is evident—discard the wheel! The wheel should also be
inspected whenever you think the tool may have been dropped.

• When starting the tool (with a new or replacement wheel installed)
place the tool in a well protected area. If the wheel has an undetected
crack or flaw, it should burst in less than one minute. Never start the
tool with a person in line with the wheel. This includes the operator.

• In operation, avoid bouncing the wheel or giving it rough treatment.
If this occurs, stop the tool and inspect the wheel.

• Clean your chop saw periodically following the procedure in this manual.

• Do not remove wheel guard.

• Always use the vise or special fixturing to clamp work.

• Use only 14" type 1 wheels rated at 4100 rpm or higher.

• Allow cut off parts to cool before handling.

• Do not attempt to cut wood or plastic with this tool.

• NEVER CUT MAGNESIUM WITH THIS TOOL.

• Use chop saw in a well-ventilated area.

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• Turn chop saw off before removing any pieces from the base.

• DO NOT CUT ELECTRICALLY LIVE MATERIAL.

• NEVER USE A CIRCULAR SAW BLADE IN THIS CHOP SAW. DO

NOT USE TOOTHED BLADES.

• DO NOT OPERATE THIS TOOL NEAR FLAMMABLE LIQUIDS,
GASES OR DUST. Sparks from cutting or motor may ignite dust

and fumes.

SAVE THESE INSTRUCTIONS

WARNING: Some dust created by power sanding, sawing, grinding,

drilling, and other construction activities contains chemicals known 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 (CCA).

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.

• Avoid prolonged contact with dust from power sanding, saw-

ing, grinding, drilling, and other construction activities. Wear
protective clothing and wash exposed areas with soap and
water. Allowing dust to get into your mouth, eyes, or lay on the skin

may promote absorption of harmful chemicals.

WARNING: Use of this tool can generate and/or disburse dust,

which may cause serious and permanent respiratory or other injury.
Always use NIOSH/OSHA approved respiratory protection appropri­ate for the dust exposure. Direct particles away from face and body.

Power Supply

Be sure your power supply agrees with the nameplate marking. 120
volts, “60 Hz” means alternating current (normal 120 volt, 60 Hz house
current). A voltage decrease of more than 10% will cause a loss of
power and overheating.

Cutting Capacity

The wide vise opening and high pivot point provide cutting capacity for
many large pieces. Use the cutting capacity chart to determine total
maximum size of cuts that can be made with a new wheel.

CAUTION: CERTAIN LARGE, CIRCULAR OR IRREGULARLY
SHAPED OBJECTS MAY REQUIRE ADDITIONAL HOLDING
MEANS IF THEY CANNOT BE HELD SECURELY IN VISE.

CAUTION: DO NOT CUT MAGNESIUM WITH THIS TOOL.

Maximum Cutting Capacity

NOTE: CAPACITY SHOWN ON CHART ASSUMES NO WHEEL WEAR

AND OPTIMUM FENCE POSITION.

Standard Equipment

1 14" (355mm) Metal Cutting Abrasive Wheel. Use only high strength

Type 1 organic bonded wheels rated 4,100 rpm or higher.
(Aluminum Oxide)

1 Wheel Wrench

To Carry

Fold down unit to position where you can carry the saw. Push in lock
pin (Figure 1) to lock arm down.

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Unlocking

To unlock tool and raise head, depress motor arm slightly and pull lock
pin out. Motor arm will then pivot upward (see Figure 2).

Material Clamping and Supporting

• Angles are best clamped and
cut with both legs resting
against base.

• A spacer block slightly narrow­er than the work space
(see Figure 3) can be used to
increase wheel utilization.

• Long workpieces must be sup­ported by a block so it will be
level with top of base (see
Figure 4). The cut off end
should be free to fall downward
to avoid wheel binding.

VISE

DIAMETER OF
WORK PIECE

FENCE

SPACER

BLOCK

WIDTH OF

SPACER BLOCK

FIG. 3

LOCK PIN

FIG. 1

LOCK

PIN

FIG. 2

Spark Deflector Adjustment

To best deflect sparks away from surrounding persons and materi­als, loosen the screw, adjust the spark deflector and then retighten
screw (see Figure 5).

Vise Operation

Vise has a quick travel feature. To release the vise when it is clamped
tightly, turn the crank counterclockwise one or two times to remove
clamping pressure. Lift vise lever up. Pull crank assembly out as far
as desired. Vise may be shoved into work without cranking. Lower
vise lever then tighten vise on work by using crank (see Figure 6).

Fence Operation

Fence requires no wrenches to adjust. The quick release clamp lever
unlocks and locks the fence. When the lever is rotated fully forward,
the fence is unlocked. The fence can then be freely moved forward,
backward or rotated to allow for the best cutting position for a new
wheel and as the wheel wears.
Rotating the lever fully to the rear locks the fence in position selected. If
the bottom leg of the lever is not horizontal (parallel to the base), the

BLOCK

FIG. 4

CUT OFF

END

FIG. 5

SCREW

SPARK

DEFLECTOR

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fence is not locked. Lever will only lock fence when there is strong
resistance to moving it to rear. If resistance is light, adjust clamping
force by tightening slightly the two bolts holding the fence to the base.
Test by reclamping and attempt to move fence (see Figure 6).

Fence Angle Adjustment

Angle adjustment indicator is part of fence clamping system. Align
desired angle indicator line with edge of slot in base (see Figure 7). For
a more accurate square cut (Figure 7), disconnect power supply, unlock
fence, push arm down until wheel extends into base, place a square
against wheel, adjust fence against square, then lock fence into
position.

Switch

To start the tool, depress the trigger switch shown in Figure 8. To turn
the tool off, release the trigger switch. Keep hands and material from
wheel until it has coasted to a stop.

Removal and Installation of Wheels

1. Be sure tool is disconnected from power supply.

2. Push in wheel lock lever (Figure 9) and rotate wheel by hand until
wheel lock lever engages slot in inside flange to lock wheel. Loosen

SPINDLE SHAFT

FLANGE,

INSIDE

FLAT

WASHER

FLANGE,
OUTSIDE

WHEEL

FIG. 10

M10

BOLT

INTERNAL

THREAD

FIG. 9

WHEEL LOCK LEVER

TRIGGER

SWITCH

FIG. 8

WHEEL

FIG. 7

SQUARE

ANGLE

ADJUSTMENT

INDICATOR

SLOT
EDGE

VISE

LEVER

CRANK

FIG. 6

VISE

FENCE

FENCE
BOLTS

CLAMP LEVER

FORWARD

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the bolt counterclockwise in the center of the abrasive wheel with
the 8 mm hex wrench found in the holder in the base. Bolt has right
hand thread.

3. Remove the bolt, washer, outside flange, and old wheel (Fig. 10).

4. Install the new abrasive wheel by reversing the above steps.

5. Do not over tighten bolt.

DO NOT MAKE ANY ADJUSTMENT WHILE THE WHEEL IS IN MOTION.
DO NOT MAKE ANY ADJUSTMENT WHILE CHOP SAW IS PLUGGED
INTO POWER SUPPLY.

WARNING: CHECK THE WORK SURFACE THAT THE CHOP
SAW RESTS ON WHEN REPLACING WITH A NEW ABRASIVE
WHEEL. IT IS POSSIBLE THAT THE WHEEL MAY CONTACT ANY
ITEMS OR STRUCTURE THAT EXTENDS ABOVE WORK SURFACE
(UNDER THE BASE) WHEN THE ARM IS FULLY LOWERED.

NAIL

FIG. 12

17-3/8"

(441 MM)

10-1/8"

(257 MM)

FIG. 11

Mounting

PROCEDURE FOR PERMANENT MOUNTING

1. Drill four holes 5/16" through the work surface (Figure 11).

2. Insert 1/4-20 screws down through the holes in the base and
through holes in mounting surface. The approximant length of the
screws should be the thickness of the mounting surface plus 4".

CRADLE MOUNTING

1. Cut two boards approximately 20" long x 2" high x 4" wide (508mm
x 50mm x 100mm).

2. Place chop saw at desired work location.

3. Place boards tightly along side, and nail to work surface,
(Figure 12).

.3"

(8 MM)

FIG. 14

BRUSH

BRUSH

FIG. 13

SCREWS

END CAP

SPRING

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Motor Brush Inspection and
Replacement

Be sure tool is unplugged before inspecting brushes. Brushes should
be regularly inspected for wear. To inspect brushes, unscrew the two
end cap screws and remove end cap (see Figure 13). To remove each
brush, first unplug the shunt wire terminal connection. Then carefully
back the brush spring out of the brush box and remove brush (see
Figure 13). Brushes should slide freely in brush box. If brushes are
worn down to .3” (see Figure 14) they should be replaced. To reinstall
each brush carefully back the spring out of the brush box, insert the
brush and return the spring making sure it is pressing on the brush
and not touching the brush box. Then replace the end cap and two
screws.

Operation Tips for More Accurate Cuts

• Allow the wheel to do the cutting. Excessive force will cause the
wheel to glaze reducing cutting efficiency and/or to deflect caus­ing inaccurate cuts.

• Adjust fence angle (Figure 7).

• Make sure material is laying flat across base.

• Properly clamp material to avoid movement and vibration.

Cleaning

Blowing dust and grit out of the main housing by means of an air hose
is recommended and may be done as often as dirt is seen collecting in
and around the air vents.

Accessories

Recommended accessories for use with your tool are available at
extra cost from your local service center. If you need any assistance
in locating any accessory, please contact GRABBER Construction
Products, 205 Mason Circle, Concord, CA 94520 or call 1-800-477­TURN (1-800-477-8876).

CAUTION: The use of any other accessory not recommended

for use with this tool could be hazardous.

Repairs

To assure product SAFETY and RELIABILITY, repairs, maintenance
and adjustment should be performed by authorized service centers or
other qualified service organizations, always using identical replace­ment parts. ALWAYS WEAR SAFETY GLASSES. ALWAYS

SECURE WORK IN VISE. DISCONNECT TOOL FROM POWER
SUPPLY BEFORE CHANGING WHEEL.

Lubrication

Closed-type, grease-sealed ball bearings are used throughout. These
bearings have sufficient lubrication packed in them at the factory to last
the life of the chop saw.
Gears should be relubricated every 60 to 90 days, depending upon
use. This lubrication should only be attempted by experienced power
tool repair persons like the mechanics at GRABBER service centers.
The gear case should be wiped clean and 1/2 oz. (16 grams) of
GRABBER Lubricant Part No. 790206 (6 oz. tube) placed in the gear
case.

Full Warranty

GRABBER heavy duty industrial tools are warranted for one year from
date of purchase. We will repair, without charge, any defects due to
faulty materials or workmanship. For warranty repair information, call
1-800-477-TURN (1-800-477-8876). This warranty does not apply to
accessories or damage caused where repairs have been made or
attempted by others. This warranty gives you specific legal rights and
you may have other rights which vary in certain states or provinces.