Alpha PSG-125 User manual

Part No: PSG-125
Version 1
103 Bauer Drive, Oakland, NJ 07436 • 800-648-7229 • Fax: [phone]
www.alpha-tools.com
Alpha®5” Pneumatic
Angle Grinder
Instruction Manual
MANUAL

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TABLE OF CONTENTS
Introduction.......................................................................................... 3
About the Symbols .............................................................................. 3
Safety Instructions for PneumaticTools ............................................... 4
PSG-125 Overview.............................................................................. 6
Specications................................................................................. 6
Equipment Included............................................................................. 7
Additional Precautions for Using the Pneumatic Angle Grinder .......... 8
Air Pressure and Volume................................................................ 9
Rust Protection............................................................................... 9
Cleaning the Rotor Assembly ......................................................... 9
How to Add the Rust Inhibitor Oil ................................................. 10
Filter/Regulator System..................................................................... 11
Connecting the Air Supply ................................................................. 11
Spindle Size....................................................................................... 12
Sound Level....................................................................................... 12
Attaching the Safety Guard ............................................................... 12
Mounting Diamond Wheels ............................................................... 13
Attaching the Side Handle................................................................. 13
Operation........................................................................................... 14
Throttle Operation ........................................................................ 14
Exhaust Vent ................................................................................ 14
PSG-125 Pneumatic Angle Grinder Schematic ................................. 15
PSG-125 Pneumatic Angle Grinder Parts List................................... 16
Accessories and Factory Service ...................................................... 18
Product Registration.......................................................................... 19

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INTRODUCTION
Thank you for purchasing an Alpha® PSG-125 Pneumatic Angle Grinder.
Please read this instruction manual thoroughly to ensure safe and correct
use of the Pneumatic Angle Grinder. Keep this manual in a place where
operators can access it easily whenever necessary.
ABOUT THE SYMBOLS
According to the hazard level, all safety notes in this manual are
classied into “DANGER”, “WARNING”, and “CAUTION”.
DANGER! Death or serious personal injury is imminent when
handling this pneumatic angle grinder incorrectly.
WARNING! There is a possibility of death or serious personal
injury when handling this pneumatic angle grinder
incorrectly.
CAUTION! There is a possibility of personal injury or property
damage when handling this pneumatic angle
grinder incorrectly.
Note: In some situations, failing to observe WARNING notes could result
in death or serious personal injury. Be sure to read and observe
the safety notes to ensure safety and correct use of the pneumatic
angle grinder.

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SAFETY INSTRUCTIONS FOR POWER TOOLS
1. KNOW YOUR POWER TOOL. Read owner’s manual carefully.
Learn its applications and limitations as well as specic potential
hazards particular to this tool.
2. KEEP WORK AREA CLEAN. Cluttered areas and benches invite
accidents.
3. AVOID DANGEROUS ENVIRONMENTS. Keep work areas as dry
as possible. Do not use tool in presence of ammable liquids or
gases. Keep the area well lit.
4. KEEP CHILDREN AND VISITORS AWAY. All visitors should be kept
a safe distance from the work area. Keep out of reach of children.
5. DON’T FORCE TOOL. It will do the job better and safer at the rate
for which it was designed.
6. WEAR PROPER APPAREL. Do not wear loose clothing or jewelry
as it can get caught in moving parts. Rubber gloves and insulated
non-skid footwear are recommended. Wear protective covering to
contain long hair.
7. WEAR PROPER EYE PROTECTION. All users and bystanders
must always wear proper personal eye protection which conform with
ANSI/ISEA Z87.1 (CAN/CSA Z94.3). Also use a face or dust mask if
operation is dusty. Always wear certied safety equipment.
8. WEAR PROPER EAR PROTECTION. All users and bystanders
must wear proper personal ear protection which conforms with ANSI
S12.6 (S3.19) hearing protection.
9. WEAR PROPER RESPIRATORY PROTECTION. All users and
bystanders must wear proper personal respiratory protection. Always
use NIOSH/OSHA approved respiratory protection appropriate for the
dust exposure.
Warning: Some dust created by power sanding, sawing, grinding, drilling,
polishing 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, cement and other masonry products, and
- Arsenic and chromium from chemically-treated lumber.

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Your risk from these exposures varies, depending on how often you do this
type of work. To reduce your exposure, work in a well ventilated area, and
work with approved safety equipment, such as dust masks that are specially
designed to lter out microscopic particles.
To familiarize with the risks associated with a material, consult with your
employer, manufacturer/supplier and government agencies regarding the
hazards of the materials and their recommendations to protect yourself.
10. DON’T ABUSE AIR SUPPLY HOSE. Don’t carry tool by supply hose
or expose to tra󰀩c areas where it can be crushed.
11. ALWAYS SECURE WORK PIECE. Use clamps or a vise to hold
work. It’s safer than using your hand and it frees both hands to
operate tool.
12. DON’T OVERREACH. Keep proper footing and balance at all times.
13. DISCONNECT TOOLS WHEN NOT IN USE. Always disconnect
tool before servicing when changing blades.
14. REMOVE ADJUSTING KEYS AND WRENCHES. Form a habit of
checking to see that keys and adjusting wrenches are removed from
tool before turning it on.
15. MAINTAIN TOOLS WITH CARE. Keep tools clean at all times for
best and safest performance. Follow instructions for lubricating and
changing accessories. Keep handles dry, clean and free of oil or
grease. Inspect moving parts for alignment and binding as well as
for breakage and improper mounting.
16. AVOID ACCIDENTAL STARTING. Do not carry a “connected” tool,
or make adjustments, or change discs without making sure the tool
is disconnected from the air supply.
17. USE ONLY RECOMMENDED ACCESSORIES. The use of any
accessories other than what is listed or recommended for this
particular tool may be hazardous.
18. KEEP HANDS AWAY FROM ALL MOVING PARTS.
19. USE SIDE HANDLES. Supplied with tool for control and safety.
20. STAY ALERT. Watch what you are doing and use common sense.
Do not operate tool when you are tired, or under the inuence of
medication or alcohol.