Buffalo Tools COAG7 Quick reference guide

COAG7
7-Inch Angle Grinder
Assembly & Operating Instructions
READ ALL INSTRUCTIONS AND WARNINGS BEFORE USING THIS PRODUCT.
This manual provides important information on proper operation & maintenance. Every effort has been
made to ensure the accuracy of this manual. These instructions are not meant to cover every possible
condition and situation that may occur. We reserve the right to change this product at any time without
prior notice.
IF THERE IS ANY QUESTION ABOUT A CONDITION BEING SAFE OR UNSAFE, DO NOT
OPERATE THIS PRODUCT!
HAVE QUESTIONS OR PROBLEMS? DO NOT RETURN THIS PRODUCT TO THE
RETAILER - CONTACT CUSTOMER SERVICE.
If you experience a problem or need parts for this product, visit our website http://www.buffalotools.com
or call our customer help line at 1-888-287-6981, Monday-Friday, 8 AM - 4 PM Central Time. A copy of the
sales receipt is required.
FOR CONSUMER USE ONLY – NOT FOR PROFESSIONAL USE.
KEEP THIS MANUAL, SALES RECEIPT & APPLICABLE WARRANTY FOR FUTURE
REFERENCE.

TABLE OF CONTENTS
RECOGNIZE SAFETY SYMBOLS, WORDS AND LABELS.......................................................................... 2
GENERAL PRODUCT SPECIFICATIONS .................................................................................................... 3
FEATURES.................................................................................................................................................... 3
PACKAGE CONTENTS................................................................................................................................. 3
SPECIFICATIONS ......................................................................................................................................... 3
COMPONENTS ............................................................................................................................................. 3
IMPORTANT SAFETY RULES...................................................................................................................... 4
ASSEMBLY.................................................................................................................................................... 6
ATTACHING THE GRINDING WHEEL GUARD............................................................................................ 6
ATTACHING OR REPLACING A GRINDING WHEEL.................................................................................. 6
ATTACHING THE HANDLE........................................................................................................................... 7
OPERATION.................................................................................................................................................. 7
MAINTENANCE............................................................................................................................................. 8
RECOGNIZE SAFETY SYMBOLS, WORDS & LABELS
This is a safety alert symbol. It is used to alert you to potential personal
injury hazards. Obey all safety messages that follow this symbol to avoid
possible injury or death. WARNING indicates a potentially hazardous
situation, which, if not avoided, could result in death or serious injury.
READ AND UNDERSTAND ALL INSTRUCTIONS. Failure to follow all instructions may result in electric
shock, fire and/or serious personal injury.
WHAT YOU NEED TO KNOW ABOUT SAFETY INSTRUCTIONS
The warning and safety instructions appearing in this manual are not meant to cover all possible conditions
and situations that may occur. Common sense, caution and care must be exercised when operating or
cleaning tools and equipment. Always contact your dealer, distributor, service agent or manufacturer about
problems or conditions you do not understand before operating the product.
COAG7 7-Inch Angle Grinder Assembly & Operating Instructions 2

GENERAL PRODUCT SPECIFICATIONS
FEATURES
• Left Or Right Handed Design
• Push Button Shaft Lock
PACKAGE CONTENTS
1)7-Inch Angle Grinder
1) Handle
1) 7-Inch Grinding Wheel
2) Wrenches
2) Carbon Brushes
SPECIFICATIONS
• Rated Voltage 120V / 60Hz
• Watts 1200 / 12Amps
• RPM 8,000
COMPONENTS
Observe the locations and functions of the various components and controls of this tool.
4 5 6
7
8
9
3
2
1
1) Grinding Wheel
2) Grinding Wheel Guard
3) Handle
4) Carbon Brush Access
5) Power Switch
6) Shaft Lock Button
7) Power Cord
8) Motor Housing
9) Spindle Lock
COAG7 7-Inch Angle Grinder Assembly & Operating Instructions 3

IMPORTANT SAFETY RULES
COMMON SENSE AND CAUTION ARE FACTORS WHICH CANNOT BE BUILT INTO ANY PRODUCT.
THESE FACTORS MUST BE SUPPLIED BY THE OPERATOR.
Keep the work area clean and well lit. A cluttered work area may cause accidents.
Never use this product near flammable liquids or gasses.
Never allow children to use this product without responsible adult supervision. When operating this
product, keep children and bystanders at a safe distance from the work area.
Wear suitable clothing. Do not wear loose clothing or jewelry. They may get caught in moving parts.
Never wear rings with protruding parts. Wear a hat over long hair. Wear rubber footwear.
Always wear safety goggles, a dust mask and ear protection when using the product.
Do not use this product without the Grinding Wheel Guard in place.
Prevent electrical shock. Keep the power cord away from heat, oil, sharp edges and rough surfaces. Do
not operate if power cord is frayed or damaged.
Never use product in damp or wet conditions.
Never remove the plug or modify the plug in any way.
When in use, make sure this product is always plugged into an electrical receptacle with an
appropriate breaker switch.
Do not use grinding wheels larger than 7 inches in diameter.
When not in use, store product in a secure, dry and safe place. The storage area should be lockable
and out of the reach of children.
Use a product designed for the job being performed. Never use the tool for anything other than its
intended purpose.
Maintain this product with care. This product works best and safest if it is kept clean. Observe the
instructions for maintenance and changing accessories. Keep dry and free of oil and grease.
This power tool is equipped with a polarized plug; meaning one blade is wider than the other and is
designed to fit into a standard polarized outlet. The plug will fit into polarized outlets only one way. DO
NOT FORCE THE PLUG INTO THE OUTLET! If the plug does not fit, a polarized outlet may need to be
installed by a qualified electrician.
COAG7 7-Inch Angle Grinder Assembly & Operating Instructions 4

IMPORTANT SAFETY RULES (continued)
If working outdoors, use extension cords marked and rated for outdoor use. When using machines
with a ground connection, an extension cord with a grounded connection should be used and connected to
a grounded outlet.
Stay alert. Do not use this product when impaired by medicine, drugs, or alcohol. Watch what you are
doing and use common sense for your safety.
Before starting the machine check that all safety devices and parts operate smoothly and
efficiently. Make sure that all moving parts are in good working order. Check the machine for any broken
parts. Make sure all parts are fitted properly and any other conditions that might affect the proper
functioning of the machine are correct. Do not use the machine when it cannot be switched on or off.
For your own safety, use only accessories recommended in this manual.
Service must be performed by qualified repair personnel. Service or maintenance performed by
unqualified personnel could result in a risk of injury.
When servicing a tool, use only identical replacement parts. Use of unauthorized parts or failure to
follow maintenance instructions may create a risk of electric shock or injury
KEEP THIS MANUAL, SALES RECEIPT & APPLICABLE WARRANTY FOR FUTURE
REFERENCE. READ ALL INSTRUCTIONS AND WARNINGS BEFORE USING THIS
PRODUCT. When unpacking, check to make sure all parts listed on page 3 are included. If any parts are
missing or broken, please call Customer Service at 1-888-287-6981.
COAG7 7-Inch Angle Grinder Assembly & Operating Instructions 5

ASSEMBLY
Do not operate this unit without the Grinding Wheel Guard in place. The Grinding Wheel Guard
should always be placed between the user and the grinding wheel.
Do not operate this unit without the handle in place. Using the grinder without the handle in place
could result in loss of control, and result in serious injury.
ATTACHING THE GRINDING WHEEL GUARD
COAG7 7-Inch Angle Grinder Assembly & Operating Instructions 6
Be sure the COAG7 7-Inch Angle Grinder is unplugged
before making adjustments or performing any maintenance.
The Grinding Wheel Guard consists of one piece
of heavy grade metal and is attached to the angle grinder
by a nut and bolt. (A, Figure 1)
A small bulge in the ring (B, Figure 1) fits in a corresponding
groove in the Angle Grinder. (A, Figure 2)
Place the Grinding Wheel Guard on the grinder, with the bulge in the groove, and
then tighten the nut using the Hex wrench. Loosening the nut allows you to move the
Grinding Wheel Guard to best suit the situation. (Figure 3)
ATTACHING OR REPLACING A GRINDING WHEEL
Press the Spindle Lock Button located on top of the
grinder to lock the Spindle in place. (A, Figure 4)
Place the Disk Flange on the Spindle. Note that the Disk
Flange is shaped to fit the Spindle only one way. The two
horizontal lines face upward when set in place. (A, Figure 5)
With the tool turned upside down, and the Disk Flange in
place, slip the Grinding Wheel over the Spindle and into
the Grinding Wheel Cover. (Figure 6)
Place the Clamp Nut on the
Spindle and screw in place.
Once it is hand-tight, use
the wrench to tighten completely.
(Figures 5 & 6)
Reverse this process to remove
or replace a worn grinding wheel.
A
Figure 2
A
A
B
Figure 1
Figure 3
Figure 4
A
Figure 5
Figure 6 Figure 6 Figure 6

ATTACHING THE HANDLE
Left-handed and right-handed users may use the grinder. Attach the handle by
screwing it into the side of the grinder. Right-handed users attach the handle to
the left side of the grinder, while left-handed users attach the handle to the
right side of the grinder. (Figure 7)
Figure 7
OPERATION
Wear ANSI-approved eye protection, dust mask and heavy-duty work gloves when using this
product.
Lift the grinder off the work surface before starting or stopping the motor.
Applying too much pressure to the grinder can cause damage to the grinder.
Always secure the work piece using clamps. Never use your hands to hold the piece in place. An
unsecured work piece could cause serious injury.
This grinder is equipped with a Shaft Lock Button, which locks the power on. To engage the lock, squeeze
the trigger to engage power. With the trigger squeezed, push the Shaft Lock Button in and release. The
power should remain “On” even if you release the trigger. To disengage the Shaft Lock Button, squeeze the
trigger again and press the Shaft Lock Button again to disengage. Releasing the trigger turns the power off.
When using this grinder, always grind flat surfaces by keeping the grinder at a 5˚– 15˚, so only the front of
the grinding wheel touches the surface. Grip the grinder firmly with one hand and the handle with the other.
The arrow on top of the grinder indicates the direction the grinding wheel spins.
Always select the appropriate grinding wheel for the job. The wheel provided with the grinder is suitable for
grinding welds, stainless steel, structural steel, or preparing surfaces to be welded. All grinding wheels
purchased for use with this grinder should be rated for an operating speed of at least 8,000 RPM. For best
results, keep the grinder moving and apply just enough pressure to keep the grinder from bouncing.
COAG7 7-Inch Angle Grinder Assembly & Operating Instructions 7

MAINTENANCE
Disconnect the power supply before cleaning. Wear safety eyewear before cleaning. Used
compressed dry air to blow off dust and debris. Use a soft bristle brush if compressed air is not available.
Applying excessive force to the grinder can overload the motor, decrease the life and increase
the wear on the tool.
Some chemicals can damage this tool. Do not use harsh chemicals such as gasoline, carbon
tetrachloride, paint thinner, etc.
A qualified technician must perform any tool service or repair. Service or maintenance performed by
unqualified personnel could result in injury. Use only identical replacement parts. Use of unauthorized
parts or failure to follow maintenance instructions may create a risk of electric shock or injury.
Do not make contact with a grounded surface while using this power tool. Contact with surfaces
like pipes, radiators or major appliances increases your risk of electric shock.
Keep construction debris out of grinder vents and triggers by blowing with compressed air.
Use only mild soap and a slightly damp cloth to clean the grinder.
This motor uses carbon brushes, which may require replacing. Carbon brushes wear out over time, and
could create motor trouble. Keep carbon brushes free and clear of debris, and replace worn parts when
necessary.
COAG7 7-Inch Angle Grinder Assembly & Operating Instructions 8
(COAG70808)