Ryobi BGH827, BGH616 User Manual

Page 1
OPERATOR’S MANUAL
BENCH GRINDER
Your bench grinder has been engineered and manufactured to Ryobi’s high standard for dependability, ease of operation, and operator safety. When properly cared for, it will give you years of rugged, trouble-free performance.
WARNING: To reduce the risk of injury, the user must read and understand the operator's manual before using
this product.
Thank you for buying a Ryobi product.
SAVE THIS MANUAL FOR FUTURE REFERENCE
Page 2
TABLE OF CONTENTS
n Table of Contents............................................................................................................................................................ 2
n Introduction..................................................................................................................................................................... 2
n General Safety Rules ...................................................................................................................................................3-4
n Specific Safety Rules ...................................................................................................................................................... 5
n Symbols .......................................................................................................................................................................6-7
n Electrical ......................................................................................................................................................................... 8
n Features .......................................................................................................................................................................... 9
n Tools Needed................................................................................................................................................................ 10
n Loose Parts ................................................................................................................................................................... 10
n Assembly .................................................................................................................................................................11-12
n Operation .................................................................................................................................................................13-14
n Maintenance ............................................................................................................................................................15-16
n Parts Ordering / Service ............................................................................................................................................... 18
INTRODUCTION
This tool has many features for making its use more pleasant and enjoyable. Safety, performance, and dependability have been given top priority in the design of this product making it easy to maintain and operate.
2
Page 3
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 personal injury.
READ ALL INSTRUCTIONS
n KNOW YOUR POWER TOOL. Read the operator’s
manual carefully. Learn the grinder’s applications and limitations as well as the specific potential hazards related to this tool.
n GUARD AGAINST ELECTRICAL SHOCK BY PREVENT-
ING BODY CONTACT WITH GROUNDED SURFACES.
For example, pipes, radiators, ranges, refrigerator enclo­sures.
n KEEP GUARDS IN PLACE and in good working order.
n REMOVE ADJUSTING KEYS AND WRENCHES. Form
habit of checking to see that keys and adjusting wrenches are removed from tool before turning it on.
n KEEP WORK AREA CLEAN. Cluttered areas and benches
invite accidents. DO NOT leave tools or pieces of wood on the bench grinder while it is in operation.
n DO NOT USE IN DANGEROUS ENVIRONMENTS. Do
not use power tools in damp or wet locations or expose to rain. Keep the work area well lit.
n KEEP CHILDREN AND VISITORS AWAY. All visi-
tors should wear safety glasses and be kept a safe distance from work area. Do not let visitors contact tool or extension cord while operating.
n MAKE WORKSHOP CHILDPROOF with padlocks and
master switches, or by removing starter keys.
n DON’T FORCE TOOL. It will do the job better and safer
at the feed rate for which it was designed.
n USE RIGHT TOOL. Don't force the tool or attachment to
do a job it was not designed for. Don't use it for a purpose not intended.
n USE THE PROPER EXTENSION CORD. Make sure your
extension cord is in good condition. Use only a cord 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. A wire gauge size (A.W.G.) of at least 16 is recommended for an extension cord 25 feet or less in length. If in doubt, use the next heavier gauge. The smaller the gauge number, the heavier the cord.
n DRESS PROPERLY. Do not wear loose clothing, gloves,
neckties, or jewelry. They can get caught and draw you into moving parts. Rubber gloves and nonskid footwear are recommended when working outdoors. Also wear protective hair covering to contain long hair.
n ALWAYS WEAR SAFETY GLASSES WITH SIDE
SHIELDS. Everyday eyeglasses have only impact- resistant lenses, they are NOT safety glasses.
n SECURE WORK. Use clamps or a vise to hold work when
practical. It's safer than using your hand and frees both hands to operate tool.
n DON’T OVERREACH. Ke ep proper footing and
balance at all times.
n MAINTAIN TOOLS WITH CARE. Keep tools sharp
and clean for better and safer performance. Follow instruc­tions for lubricating and changing accessories.
n DISCONNECT TOOLS. When not in use, before
servicing, or when changing attachments, grinding wheels, etc., all tools should be disconnected.
n AVOID ACCIDENTAL STARTING. Be sure switch is off
when plugging in any tool.
n USE RECOMMENDED ACCESSORIES. Consult the
owner's manual for recommended accessories. The use of improper accessories may cause risk of injury to persons.
n NEVER STAND ON TOOL. Serious injury could occur if
the tool is tipped or if the cutting tool is unintentionally contacted.
n 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 must be properly repaired or replaced by an authorized service center to avoid risk of personal injury.
n PROTECT YOUR LUNGS. Wear a face or dust mask if
the grinding operation is dusty.
n PROTECT YOUR HEARING. Wear hearing protection
during extended periods of operation.
n DO NOT ABUSE CORD. Never yank cord to discon-
nect from receptacle. Keep cord from heat, oil, and sharp edges.
n USE OUTDOOR EXTENSION CORDS. When tool
is used outdoors, use only extension cords with approved ground connection that are intended for use outdoors and so marked.
n WHEELS COASTS AFTER BEING TURNED OFF.
n NEVER USE IN AN EXPLOSIVE ATMOSPHERE.
Normal sparking of the motor could ignite fumes.
3
Page 4
GENERAL SAFETY RULES
n INSPECT TOOL CORDS PERIODICALLY. If dam-
aged, have repaired by a qualified service technician at an authorized service facility. The conductor with insulation having an outer surface that is green with or without yellow stripes is the equipment-grounding conductor. If repair or replacement of the electric cord or plug is necessary, do not connect the equipment-grounding conductor to a live terminal. Repair or replace a damaged or worn cord immediately. Stay constantly aware of cord location and keep it well away from the rotating grinding wheels.
n INSPECT EXTENSION CORDS PERIODICALLY and
replace if damaged.
n DO NOT USE TOOL IF SWITCH DOES NOT TURN IT
ON AND OFF. Have defective switches replaced by an
authorized service center.
n USE ONLY CORRECT WHEELS. Do not use wheels
with incorrect size holes. Never use wheel washers or wheel bolts that are defective or incorrect. The maxi­mum wheel capacity of your grinder; BGH616 is 6 in and BGH827 is 8in.
n NEVER TOUCH WHEEL or other moving parts during
use.
n NEVER START A TOOL WHEN ANY ROTATING COM-
PONENT IS IN CONTACT WITH THE WORKPIECE.
n DO NOT OPERATE A TOOL WHILE UNDER THE
IN FLUE NCE OF D RUGS, ALCOHOL, OR A NY MEDICATION.
n WHEN SERVICING use only identical replacement parts.
Use of any other parts may create a hazard or cause product damage.
n USE ONLY RECOMMENDED ACCESSORIES listed
in this manual or addendums. Use of accessories that are not listed may cause the risk of personal injury. Instructions for safe use of accessories are included with the accessory.
n DOUBLE CHECK ALL SETUPS. Make sure wheel is
tight and not making contact with workpiece before connecting to power supply.
4
Page 5
SPECIFIC SAFETY RULES
n NEVER reach to pick up a workpiece, a piece of scrap,
or anything else that is in or near the grinding path of the wheel.
n AVOID AWKWARD OPERATIONS AND HAND POSI-
TIONS where a sudden slip could cause your hand to
move into the wheel. ALWAYS make sure you have good balance.
n NEVER stand or have any part of your body in line with
the path of the wheel.
n DO NOT USE TOOL IF SWITCH DOES NOT TURN IT
ON AND OFF. Have defective switches replaced by an
authorized service center.
n DO NOT TURN THE MOTOR SWITCH ON AND OFF
RAPIDLY. This could cause the wheel to loosen and could
create a hazard. Should this ever occur, stand clear and allow the wheel to come to a complete stop. Disconnect your grinder from the power supply and securely retighten the wheel nut.
n USE ONLY FLANGES furnished with this bench
grinder.
n IF ANY PART OF THIS GRINDER IS MISSING or should
break, bend, or fail in any way, or should any electrical component fail to perform properly, shut off the power switch, remove the machine plug from the power source and have damaged, missing, or failed parts replaced be­fore resuming operation.
n MAKE SURE THE GRINDER IS SECURELY MOUNTED
as described in the operating instructions before con­necting the tool to a power supply.
n DO NOT OVERTIGHTEN THE WHEEL NUT. Exces-
sive tightening can cause the wheel to crack during operation.
n ALWAYS USE THE GRINDER'S WHEEL GUARDS AND
SAFETY SHIELDS.
n INSPECT GRINDING WHEEL for visible defects. Check
the wheel for fissures and cracks, and test for normal operation prior to use. Replace cracked wheel immedi­ately.
n ADJUST distance between wheel and work rest to main-
tain 1/16 in. or less separation as the diameter of the wheel decreases with use. The value of separation used in the marking is to be the separation recommended by the manufacturer but shall not be more than 1/8 in.
n ALWAYS EASE THE WORKPIECE AGAINST THE
ABRASIVE WHEEL when starting to grind. A harsh
impact can break the wheel. Use light pressure when starting to grind; too much pressure on a cold wheel can cause the wheel to crack.
n RISK OF INJURY DUE TO ACCIDENTAL STARTING.
Do not use in an area where children may be present.
n NEVER START THE GRINDER when the wheel is in
contact with the workpiece.
n SECURE WORK. Always hold workpiece firmly against
the work rest.
n DO NOT USE THE BENCH GRINDER if the flange nut
or clamp nut is missing or if the spindle shaft is bent.
n FREQUENTLY clean grinding dust from beneath grind-
er.
n STAY ALERT AND EXERCISE CONTROL. Watch what
you are doing and use common sense. Do not operate tool when you are tired. Do not rush.
n S AV E THE SE IN STRUC TIONS . Ref e r to them
frequently and use to instruct other users. If you loan someone this tool, loan them these instructions also.
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. 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.
5
Page 6
SYMBOLS
Some of the following symbols may be used on this tool. Please study them and learn their meaning. Proper interpreta­tion of these symbols will allow you to operate the tool better and safer.
SYMBOL NAME DESIGNATION/EXPLANATION
V Volts
A Amperes
Hz Hertz
W Watt
min Minutes
Alternating Current
Direct Current
n
o
.../min
No Load Speed
Class II Construction
Per Minute
Wet Conditions Alert
Voltage
Current
Frequency (cycles per second)
Power
Time
Type of current
Type or a characteristic of current
Rotational speed, at no load
Double-insulated construction
Revolutions, strokes, surface speed, orbits etc., per minute
Do not expose to rain or use in damp locations.
Read The Operator’s Manual
Eye Protection
Safety Alert
No Hands Symbol
No Hands Symbol
No Hands Symbol
No Hands Symbol
Hot Surface
To reduce the risk of injury, user must read and understand operator’s manual before using this product.
Always wear safety goggles or safety glasses with side shields, or a full face shield when operating this product.
Precautions that involve your safety.
Failure to keep your hands away from the blade will result in serious personal injury.
Failure to keep your hands away from the blade will result in serious personal injury.
Failure to keep your hands away from the blade will result in serious personal injury.
Failure to keep your hands away from the blade will result in serious personal injury.
To reduce the risk of injury or damage, avoid contact with any hot surface.
6
Page 7
SYMBOLS
The following signal words and meanings are intended to explain the levels of risk associated with this product.
SYMBOL SIGNAL MEANING
DANGER: Indicates an imminently hazardous situation, which, if not avoided, will
result in death or serious injury.
WARNING: Indicates a potentially hazardous situation, which, if not avoided, could
result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation, which, if not avoided, may
result in minor or moderate injury.
CAUTION: (Without Safety Alert Symbol) Indicates a situation that may result in
property damage.
SERVICE
Servicing requires extreme care and knowledge and should be performed only by a qualified service technician. For service we suggest you return the product to your nearest AUTHORIZED SERVICE CENTER for repair. When servic­ing, use only identical replacement parts.
WARNING:
To avoid serious personal injury, do not attempt to use this product until you read thoroughly and understand completely the operator’s manual. Save this operator’s manual and review frequently for continuing safe opera­tion and instructing others who may use this product.
WARNING:
The operation of any power tool can result in foreign objects being thrown into your eyes, which can result in severe eye damage. Before beginning power tool operation, always wear safety goggles, safety glasses with side shields, or a full face shield when needed. We recommend Wide Vision Safety Mask for use over eyeglasses or standard safety glasses with side shields. Always use eye protection which is marked to comply with ANSI Z87.1.
SAVE THESE INSTRUCTIONS
7
Page 8
ELECTRICAL
EXTENSION CORDS
Use only 3-wire extension cords that have 3-prong ground­ing plugs and 3-pole receptacles that accept the tool's plug. When using a power tool at a considerable distance from the power source, use an extension cord heavy enough to carry the current that the tool will draw. An undersized extension cord will cause a drop in line voltage, resulting in a loss of power and causing the motor to overheat. Use the chart provided below to determine the minimum wire size required in an extension cord. Only round jacketed cords listed by Underwriter's Laboratories (UL) should be used.
**Ampere rating (on tool data plate)
0-2.0 2.1-3.4 3.5-5.0 5.1-7.0 7.1-12.0 12.1-16.0
Cord Length Wire Size (A.W.G.)
25’ 16 16 16 16 14 14
50’ 16 16 16 14 14 12
100’ 16 16 14 12 10
**Used on 12 gauge - 20 amp circuit. NOTE: AWG = American Wire Gauge
When working with the tool outdoors, use an extension cord that is designed for outside use. This is indicated by the letters "WA" on the cord's jacket.
Before using an extension cord, inspect it for loose or exposed wires and cut or worn insulation.
WARNING:
Keep the extension cord clear of the working area. Position the cord so that it will not get caught on lumber, tools or other obstructions while you are working with a power tool. Failure to do so can result in serious personal injury.
SPEED AND WIRING
The no-load speed of this tool is approximately 3,600 rpm. This speed is not constant and decreases under a load or with lower voltage. For voltage, the wiring in a shop is as important as the motor’s horsepower rating. A line intended only for lights cannot properly carry a power tool motor. Wire that is heavy enough for a short distance will be too light for a greater distance. A line that can support one power tool may not be able to support two or three tools.
GROUNDING INSTRUCTIONS
In the event of a malfunction or breakdown, grounding pro­vides a path of least resistance for electric current to reduce the risk of electric shock. This tool is equipped with an elec­tric cord having an equipment-grounding conductor and a grounding plug. The plug must be plugged into a matching outlet that is properly installed and grounded in accordance with all local codes and ordinances.
Do not modify the plug provided. If it will not fit the outlet, have the proper outlet installed by a qualified electrician. Improper connection of the equipment-grounding conductor can result in a risk of electric shock. The conductor with insulation having an outer surface that is green with or with­out yellow stripes is the equipment-grounding conductor. If repair or replacement of the electric cord or plug is neces­sary, do not connect the equipment-grounding conductor to a live terminal.
Check with a qualified electrician or service personnel if the grounding instructions are not completely understood, or if in doubt as to whether the tool is properly grounded.
Repair or replace a damaged or worn cord immediately.
This tool is intended for use on a circuit that has an outlet like the one shown in figure 1. It also has a grounding pin like the one shown.
WARNING:
Check extension cords before each use. If damaged replace immediately. Never use tool with a damaged cord since touching the damaged area could cause electrical shock resulting in serious injury.
ELECTRICAL CONNECTION
This tool is powered by a precision built electric motor. It should be connected to a power supply that is 120 volts, 60 Hz, AC only (normal household current). Do not operate this tool on direct current (DC). A substantial voltage drop will cause a loss of power and the motor will overheat. If the grinder does not operate when plugged into an outlet, double check the power supply.
GROUNDING
PIN
120V GROUNDED OUTLET
Fig. 1
8
Page 9
FEATURES
PRODUCT SPECIFICATIONS-
Wheel Diameter ........................................................... 6 in.
Wheel Thickness ......................................................3/4 in.
Arbor Hole ................................................................ 1/2 in.
No Load Speed ................................................. 3600/rpm.
Input ...............................120 V, 60 Hz, AC only, 2.1 Amps
Net Weight............................................................... 24 lbs.
WHEEL DRESSING TOOL
(MODEL BGH827 ONLY)
SPARK
DEFLECTOR
(LEFT)
MODEL BGH616
SPARK DEFLECTOR
AUTO-ON
WORKLIGHT
PRODUCT SPECIFICATIONS-
Wheel Diameter ........................................................... 8 in.
Wheel Thickness ......................................................... 1 in.
Arbor Hole ................................................................ 5/8 in.
No Load Speed ................................................. 3600/rpm.
Input ...............................120 V, 60 Hz, AC only, 3.0 Amps
Net Weight............................................................ 41.2 lbs.
AUTO-ON
(RIGHT)
WORKLIGHT
RIGHT SAFETY
MODEL BGH827
SHIELD
WHEEL GUARD
LEFT SAFETY SHIELD
(W/ MAGNIFIER)
LEFT WORK REST
(GROOVED)
KNOW YOUR BENCH GRINDER
See Figure 2.
Before attempting to use this product, familiarize yourself with all operating features and safety rules.
ON/OFF SWITCH
The bench grinder features a front access On/Off switch for convenience and safety.
GRINDING WHEELS
Equipped with course and fine grinding wheels to suit most applications.
SAFETY SHIELD AND SPARK DEFLECTOR
The safety shields and spark deflectors are provided to ensure your safety.
RIGHT
WORK REST
OFF
ON
COOLANT
TRAY
SWITCH
Fig. 2
WORK REST
Provides a stable work surface when performing most grind­ing tasks. A grooved work rest is provided to allow for the grinding of drill bits
AUTO-ON WORKLIGHT
Your bench grinder comes equipped with a permanently mounted worklight that automatically lights when switch is turned on.
WHEEL DRESSING TOOL (MODEL BGH827 ONLY)
Dressing tool is used to clean the wheel from ground-in particles, and true the grinding wheel surface.
COOLANT TRAY
The coolant tray is used when grinding metal objects.
9
Page 10
TOOLS NEEDED
The following tools (not included) are needed for checking adjustments of your saw or for installing the blade:
COMBINATION WRENCH (3)
7 mm, 10 mm, and 12 mm
PHILLIPS SCREWDRIVER
LOOSE PARTS
The following items are included with your Bench Grinder:
n Shield Bracket – one left, one right ............................. 2
n Safety Shield Assemblies - left (magnified), right........ 2
n Work Rest – left (grooved), right .................................. 2
n Work Rest Brackets..................................................... 2
n Fastening Knobs (2 large, 2 medium and 2 small) ...... 6
n Washers (6 mm)........................................................... 4
n Washers (5 mm)........................................................... 2
n Lock Washers (6 mm).................................................. 2
n Wheel Dresser Tool (Model BGH827 only) .................. 1
n Operator's Manual
WHEEL DRESSING TOOL
(MODEL BGH827 ONLY)
LEFT WORK REST
(GROOVED)
ADJUSTABLE WRENCH
WORK REST
BRACKETLEFT
Fig. 3
RIGHT
WORK REST
WORK REST
BRACKET RIGHT
LOCK WASHER
SAFETY SHIELD (LEFT)
WARNING: The use of attachments or accessories not listed might be hazardous and could cause serious
personal injury.
WASHER
REAR SHIELD
BRACKET KNOB
SHIELD BRACKET (RIGHT)
SHIELD BRACKET(LEFT)
WORK
REST KNOB
SAFETY
SHIELD KNOB
SAFETY SHIELD (RIGHT)
Fig. 4
10
Page 11
ASSEMBLY
UNPACKING
This product requires assembly.
n Carefully remove the tool and any accessories from the
box. Make sure that all items listed in the packing list are included.
n Inspect the tool carefully to make sure no breakage or
damage occurred during shipping.
n Do not discard the packing material until you have care-
fully inspected and satisfactorily operated the tool.
n If any parts are damaged or missing, please call
1-800-525-2579 for assistance.
WARNING:
If any parts are missing do not operate this tool until the missing parts are replaced. Failure to do so could result in possible serious personal injury.
WARNING:
Do not attempt to modify this tool or create accesso­ries not recommended for use with this tool. Any such alteration or modification is misuse and could result in a hazardous condition leading to possible serious personal injury.
MOUNTING SAFETY SHIELD ASSEMBLY
See Figure 5.
n Fasten the safety shield assemblies to the safety shield
brackets using the fastening knob and small washer.
NOTE: The slotted part of the safety shield bracket must
face towards the grinding wheel guard.
n Attach the safety shield assembly and bracket to the
wheel guard using a washer, lock washer and rear shield bracket knob.
WARNING:
Always spin the wheel by hand before turning on the grinder to make sure the spark deflector doesn’t hit the grinding wheel.
SMALL
KNOB
WASHER
LOCK
WASHER
SMALL
WASHER
SHIELD BRACKET
(RIGHT)
WARNING:
Do not connect to power supply until assembly is complete. Failure to comply could result in accidental starting and possible serious personal injury.
WARNING:
Always disconnect the bench grinder from the power source before performing any assembly. Failure to do so could result in accidental starting resulting in possible serious personal injury.
REAR SHIELD
BRACKET KNOB
SAFETY SHIELD
(RIGHT)
Fig. 5
11
Page 12
ASSEMBLY
MOUNTING WORK REST
See Figure 6.
n Remove the knob, star washer, and washer from the car-
riage bolt on the lower portion of wheel guard.
n Using the slotted screw, star washer, washer and fasten-
ing knob, attach the work rest bracket to the inside of the wheel guard as shown.
NOTE: The grooved work rest mounts on the left side.
NOTE: The work rest bracket's lower slot must be posi-
tioned over the pin on the guard.
n With the remaining fastening knob, install the work rest
to the bracket.
NOTE: Adjust the distance between the wheel and the work rest to maintain 1/16 in. or less separation as the diameter of the wheel decreases with use.
WORK REST
LARGE
KNOB
WORK REST
BRACKET
(RIGHT)
WASHER
Fig. 6
WARNING:
Always make sure your bench grinder is securely mounted to a workbench. Failure to do so could result in an accident resulting in possible serious personal injury.
MOUNTING GRINDER TO WORKBENCH
See Figure 7.
If grinder is to be used in a permanent location, it should be fastened securely to a firm supporting surface, such as a workbench with bolts.
n Use 1/4 in. bolts, washers, and nuts (not included). The
bolt length should be 1-1/2 in. plus the thickness of the workbench.
n Locate and mark the holes where the grinder is to be
mounted.
n Drill four 3/8 in. diameter holes through workbench.
n Place sander on workbench, aligning holes in base with
holes drilled in workbench.
n Insert four 1/4 in. diameter bolts and washers and attach
nuts securely.
PIN
KNOB
CARRIAGE
BOLT
WORK
REST
ASEMBLY
WASHER
STAR WASHER
Fig. 6
HEX BOLT
12
WASHER
WASHERS
LOCK
WASHER
HEX NUT
Fig. 7
Page 13
OPERATION
WARNING:
Do not allow familiarity with tools to make you care­less. Remember that a careless fraction of a second is sufficient to inflict serious injury.
WARNING:
NOTE: Excessive pressure may damage the tool, cause the
motor to overheat, and prematurely wear down the grinding wheel.
WARNING:
Excessive pressure on a cold wheel may cause the wheel to crack.
Always wear safety goggles or safety glasses with side shields when operating power tools. Failure to do so could result in objects being thrown into your eyes resulting in possible serious injury.
WARNING:
Do not use any attachments or accessories not recommended by the manufacturer of this tool. The use of attachments or accessories not recommended can result in serious personal injury.
APPLICATIONS
This product has been designed only for the purposes listed below:
n Sharpening drill bits n Sharpening lawn mower blades n Sharpening chisels and flat screwdrivers
BASIC OPERATION
To be efficient and work as designed, your tools should be kept sharp. Dull tools can and will cause accidents.
Bench Grinders are ideal for sharpening tools such as chisels, planer blades, scissors, etc., and for removing rust or corrosion.
WARNING:
Never sharpen or grind anything made of aluminum, brass, or copper.
USING COOLANT TRAY
See Figure 8.
The built-in coolant tray allows you to cool overheated workpieces. Simply pull out the tray and fill half way with appropriate coolant.
ON/OFF SWITCH
See Figure 8.
The Bench Grinder features a front access On/Off switch for convenience and safety.
OFF
ON
SWITCH
COOLANT
TRAY
Fig. 8
Grinders remove material rapidly so pressure is the key to efficient grinding.
The proper way to sharpen a tool and avoid overheating is:
n Keep the object in constant motion, moving it at an even
pace.
n Never force a tool against the grinding wheel.
n Keep the tool cool by using either the coolant tray or a
pan of water.
n The grinding wheel should rotate “into” the object being
sharpened.
13
Page 14
OPERATION
SHARPENING TWIST DRILL BITS
See Figure 9.
Drill bits are best sharpened on a sharpening jig (available at most hardware stores). Begin on one side of the point at the existing angle, then twist the bit while maintaining contact with the grinding surface. Sharpen only the tip.
This technique requires considerable practice, so take your time and make a few “dry runs” first with the grinder off. Be sure to maintain the original cutting edge angle as this is important to the efficiency of your bits. One work rest has a V-groove angled to fit most drill bits.
SHARPENING LAWN MOWER BLADES
See Figure 10.
Lawn mower blades are usually sharpened on only one edge and dressed up slightly on the other. Perform this sharpening process on both cutting ends of the blade. After sharpening, be sure to balance the blade by removing additional material.
V-GROOVE
BIT SHARPENING
Fig. 9
CAUTION:
An unbalanced lawn mower blade may cause excessive vibration which will damage the lawn mower.
SHARPENING CHISELS AND SCREWDRIVER BLADES
See Figure 11.
When sharpening chisels and screwdrivers, work rest should support the chisel at the correct angle against the wheel.
SCREWDRIVER
LAWN MOWER BLADE
VISE
Fig. 10
14
CHISEL SHARPENING
Fig. 11
Page 15
MAINTENANCE
WARNING:
When servicing, use only identical Ryobi replacement parts. Use of any other parts may create a hazard or cause product damage.
WARNING:
Always wear safety goggles or safety glasses with side shields during power tool operation or when blowing dust. If operation is dusty, also wear a dust mask.
GENERAL MAINTENANCE
Avoid using solvents when cleaning plastic parts. Most plastics are susceptible to damage from various types of commercial solvents and may be damaged by their use. Use clean cloths to remove dirt, dust, oil, grease, etc.
WARNING:
Do not at any time let brake fluids, gasoline, petroleum­based products, penetrating oils, etc., come in contact with plastic parts. Chemicals can damage, weaken or destroy plastic which may result in serious personal injury.
WARNING:
Always disconnect the bench grinder from the power source before performing any assembly or adjustment. Failure to do so could result in accidental starting resulting in possible serious personal injury.
WHEEL REPLACEMENT
See Figure 12.
If you must replace a grinding wheel, be sure to obtain one with a safe rated speed at least as high as the “no load speed” RPM marked on the data plate of the grinder and which is marked to comply with ANSI B7.1.
To replace the grinding wheel.
n Unplug the grinder.
n Remove the wheel cover by loosening the screws.
n Loosen the wheel nut in a clockwise direction for the left
side and a counterclockwise direction for the right side.
n Remove the outer flange and grinding wheel.
n To install a new grinding wheel, reverse the above
procedure.
NOTE: Be sure the grinding wheel and outer flange are
properly seated on the spindle shaft.
WHEEL GUARD
COVER
SCREW(S)
GRINDING
WHEEL
OUTER
FLANGE
LOCK
WASHER(S)
WHEEL NUT
HEX NUT(S)
SPINDLE
SHAFT
SPARK
DEFLECTOR
INNER
FLANGE
LEFT WORK REST
(GROOVED)
LOCK WASHER
HEX NUT
STAR
WASHER
KNOB
WASHER
Fig. 12
15
Page 16
MAINTENANCE
Electric tools used on fiberglass material, wallboard, spackling compounds, or plaster are subject to accelerated wear and possible premature failure because the fiberglass chips and grindings are highly abrasive to bearings, brushes, commu­tators, etc. Consequently, we do not recommended using this tool for extended work on these types of materials. However, if you do work with any of these materials, it is extremely important to clean the tool using compressed air.
LUBRICATION
All of the bearings in this tool are lubricated with a sufficient amount of high grade lubricant for the life of the unit under normal operating conditions. Therefore, no further lubrica­tion is required.
WORKLIGHT BULB REPLACEMENT
See Figure 13.
Contact Customer Service at 1-800-525-2579 for information on replacement bulb.
NOTE: Follow these instructions to change a burnt out bulb.
n Unplug the grinder.
n Remove the two phillips head screws from the top of
worklight housing.
n Remove worklight housing.
n
While gently pushing in bulb, turn bulb to left to release.
n Place new bulb into bulb receptacle and gently push in
while turning to the right until bulb is fully seated.
n Reinstall the worklight housing using the two phillips head
screws.
NOTE: To avoid the risk of fire, always use a 12v bulb with a wattage no greater than 10w.
TO REMOVE BULB
SCREWS
AUTO-ON WORK-
LIGHT COVER
BULB
TO INSTALL BULB
BULB SOCKET
WHEEL DRESSING TOOL-MODEL BGH827
Dressing a wheel is done to renew sharpness or to true up the face of the wheel.
Set the work rest of the bench grinder at a slight angle and brace the wheel dresser against it. Do not make contact with the grinding wheel until after you have turned on the motor and the wheel is rotating at full speed. Press the dresser slightly against the rotating wheel until you get a bite, then move slowly from side to side across the wheel. A small bite and many passes is better than a big bite and one pass. Work cautiously, hold the dresser with force on the work rest. Do not use excessive pressure against the grinding wheel. Proceed slowly until you master the technique.
BULB
Fig. 13
16
Page 17
NOTES
17
Page 18
OPERATOR’S MANUAL
BENCH GRINDER
• SERVICE
Now that you have purchased your tool, should a need ever exist for repair parts or service, simply contact your nearest Ryobi Authorized Service Center. Be sure to provide all pertinent facts when you call or visit. Please call 1-800-525-2579 for your nearest Ryobi Authorized Service Center. You can also check our web site at www.ryobitools.com for a complete list of Authorized Service Centers.
• MODEL NO. AND SERIAL NO.
The model number of this tool will be found on a plate attached to the motor housing. Please record the model number and serial number in the space provided below.
• HOW TO ORDER REPAIR PARTS
When ordering repair parts, always give the following information:
• MODEL NUMBER
• SERIAL NUMBER
RYOBI TECHNOLOGIES, INC.
1428 Pearman Dairy Road, Anderson, SC 29625
Post Office Box 1207, Anderson, SC 29622-1207
BGH616 and BGH827
Phone 1-800-525-2579
www.ryobitools.com
983000-626 3-05
Loading...