Clarke Metalworker CBG8370L Instruction Manual

OPERATION & MAINTENANCE
INSTRUCTIONS
LS0512
BENCH GRINDER WITH LIGHT AND
WHEEL DRESSER
MODEL NO: CBG8370L
PART NO: 6500532

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INTRODUCTION
Thank you for purchasing this CLARKE Bench Grinder with light and wheel
dresser.
Before attempting to use this product, please read this manual thoroughly and
follow the instructions carefully. In doing so you will ensure the safety of yourself
and that of others around you, and you can look forward to your purchase
giving you long and satisfactory service.
GUARANTEE
This product is guaranteed against faulty manufacture for a period of 12
months from the date of purchase. Please keep your receipt which will be
required as proof of purchase.
This guarantee is invalid if the product is found to have been abused or
tampered with in any way, or not used for the purpose for which it was
intended.
Faulty goods should be returned to their place of purchase, no product can
be returned to us without prior permission.
This guarantee does not effect your statutory rights.
SPECIFICATIONS
Model Number CBG8370L
Part Number 6500532
Rated Voltage 230V~50Hz
Rated Input 370 W
No Load Speed 2850 RPM (+/- 5%)
Sound Pressure Level LpA 84 db
Sound Power Level LWA 94 db
Uncertainty Factor K 3
Weight 14.85 kg
Abrasive wheels supplied Coarse (36 Grit), Fine (60 Grit)
Wheel dimensions Diameter (200mm) Thickness (20 mm) Bore (15.88 mm)

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POWER TOOL SAFETY WARNINGS
1) WORK AREA
1. Keep the work area clean and well lit. Cluttered and dark areas invite accidents.
2. Do not operate power tools in explosive atmospheres, such as in the presence of
flammable liquids, gases or dust. Power tools create sparks which may ignite the
dust or fumes.
3. Keep children and bystanders away while operating a power tool. Distractions can
cause you to lose control.
2) ELECTRICAL SAFETY
1. Power tool plugs must match the outlet. Never modify the plug in any way. Do not
use adaptor plugs with earthed (grounded) power tools. Unmodified plugs and
matching outlets will reduce the risk of electric shock.
2. Do not expose power tools to rain or wet conditions. Water entering a power tool will
increase the risk of electric shock.
3. Do not abuse the cable. Never use it for carrying, pulling or unplugging the power
tool. Keep the cable away from heat, oil, sharp edges or moving parts. Damaged or
entangled cables increase the risk of electric shock.
4. When operating a power tool outdoors, use an extension cable suitable for outdoor
use. Use of a cable suitable for outdoor use reduces the risk of electric shock.
5. If operating the power tool in a damp location is unavoidable, use a residual current
device (RCD) protected supply.
3) PERSONAL SAFETY
1. Stay alert, watch what you are doing and use common sense when operating a
power tool. Do not use a power tool while you are tired or under the influence of
drugs, alcohol or medication. A moment of inattention while operating power tools
may result in personal injury.
2. Use safety equipment. Always wear eye protection. Safety equipment such as dust
mask, non-skid safety shoes, hard hat, or hearing protection used for appropriate
conditions will reduce personal injuries.
3. Avoid accidental starting. Ensure the switch is in the off position before plugging in.
Carrying power tools with your finger on the switch or plugging in power tools that
have the switch on invites accidents.
4. Remove any wrench before turning the power tool on. A wrench left attached to a
rotating part may result in personal injury.
5. Do not overreach. Keep proper footing and balance at all times. This enables better
control of the power tool in unexpected situations.
6. Dress properly. Do not wear loose clothing or jewellery. Keep your hair, clothing and
gloves away from moving parts. Loose clothes, jewellery or long hair can be caught
in moving parts.

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4) POWER TOOL USE AND CARE
1. Do not force the power tool. Use the correct accessories for your application. The
correct power tool will do the job better and safer at the rate which it was designed.
2. Do not use the power tool if the switch does not turn it on and off. Any power tool that
cannot be controlled with the switch is dangerous and must be repaired.
3. Disconnect the plug from the power source before changing accessories, or storing
power tools. Such preventive safety measures reduce the risk of starting the power
tool accidentally.
4. Store idle tools out of the reach of children and do not allow persons unfamiliar with
the power tool or these instructions to operate it. Power tools are dangerous in the
hands of untrained users.
5. Maintain power tools. Check for misalignment or binding of moving parts, breakage
of parts and any other condition that may affect the power tool’s operation. If
damaged, have the power tool repaired before use. Many accidents are caused
by poorly maintained power tools.
6. Use the power tool and accessories in accordance with these instructions and in the
manner intended, taking into account the working conditions and the work to be
performed. Use of the power tool for operations different from intended could result
in a hazardous situation.
7. The performance of this tool may vary, depending upon variations in line voltage.
Extension cable usage may also affect performance.
5) SERVICE
1. Have your power tool serviced by qualified service personnel using only identical
replacement parts. This will ensure that the safety of the power tool is maintained.
BENCH GRINDER SAFETY WARNINGS
1. Hold the hand tool or blade being sharpened firmly to prevent loss of control.
2. NEVER install an abrasive flap wheel or sanding disc on this grinder.
3. Always replace a cracked grinding wheel immediately.
4. Never use damaged or incorrect grindstones. The stone and retaining bolt were
specially designed for your grinder, for optimum performance and safety of
operation. Inspect the condition of the grinding stone before use and do not use if
any damage is noticed.
5. Do not use aluminium oxide wheels when grinding non-ferrous metals such as
aluminium or brass. Use silicon carbide wheels (not included) for grinding non-ferrous
metals.
6. Always use the tool rests to steady the workpiece. If the tool attachments are not
used, the torque of the spinning grinding/polishing wheel may pull the workpiece
from your hands.
7. Never leave the grinder unattended when it is connected to an electrical power
supply. Switch off the machine and unplug it before leaving.

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8. ALWAYS check for damaged parts. Before further use of the tool, a guard or other
part that is damaged should be carefully checked to determine if it would operate
properly and perform its intended function. Check for misalignment or binding of
moving parts, breakage of parts and any other condition that may affect the tool's
operation. A part that is damaged should be properly repaired or replaced at an
authorised service centre. Following this rule will reduce the risk of electric shock, fire
or serious injury.
9. Gloves, manufactured to the current European safety standards should be worn
when operating grinding equipment.
10. Eye protection manufactured to the current European safety standards should be
worn when operating grinding equipment.
11. Eye guards supplied with the machine must be used at all times.
Note: Bench grinders used in industrial environments may be subject to the
requirements of The Provision and Use of Work Equipment regulations 1992
(particularly regarding the training requirement of The Abrasive Wheels
Regulations 1970), or other legislation. If in doubt seek advice.
SAFETY SYMBOLS
Read Instruction Manual Before Use
This Machine Is Not Suitable For Hand Held Use
Not Permitted For Wet Grinding
Wear Eye Protection
Wear Ear Defenders
Wear Protective Gloves

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ELECTRICAL CONNECTIONS
Before switching the product on, make sure that the voltage of your electricity supply is
the same as that indicated on the rating plate. This product is designed to operate on
230VAC 50Hz. Connecting it to any other power source may cause damage.
This product may be fitted with a non-rewireable plug. If it is necessary to change the
fuse in the plug, the fuse cover must be refitted. If the fuse cover becomes lost or
damaged, the plug must not be used until a suitable replacement is obtained.
If the plug has to be changed because it is not suitable for your socket, or due to
damage, it should be cut off and a replacement fitted, following the wiring instructions
shown below. The old plug must be disposed of safely, as insertion into a mains socket
could cause an electrical hazard.
If the colours of the wires in the power cable of this product do not correspond with the
markings on the terminals of your plug, proceed as follows.
• The wire which is coloured Blue must be connected to the terminal which is
marked Nor coloured Black.
• The wire which is coloured Brown must be connected to the terminal which is
marked Lor coloured Red.
• The wire which is coloured Yellow and Green must be connected to the
terminal which is marked E or or coloured Green.
We strongly recommend that this machine is connected to the mains supply via a Residual
Current Device (RCD)
If in any doubt, consult a qualified electrician. DO NOT attempt any repairs yourself.
WARNING! Read these electrical safety instructions thoroughly
before connecting the product to the mains supply.
WARNING! The wires in the power cable of this product are
coloured in accordance with the following code:
Blue = Neutral Brown = Live Yellow and Green = Earth
Plug must be BS1363/A approved.
Always fit a 13 Amp fuse.
Ensure that the outer sheath of the cable is firmly held by the clamp
Neutral
(Blue)
Live
(Brown)
Earth
(Green and Yellow)

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CARTON CONTENTS
The following items should be supplied in the carton. If any parts are missing or
damaged, please contact the Clarke dealer where you purchased the
bench grinder.
PART IDENTIFICATION
1 x Bench Grinder Assembly with Lamp (2 grinding wheels attached)
2 x Eye Shields (1 with Built-in Magnifying Lens)
2 x Eye Shield Arms with bolts and washers
2 x Eye Shield Brackets
2 x Hand Knobs with washers
2 x Spark Deflectors with bolts and washers
2 x Tool Rests with screws and washers (1 flat and 1 with a channel for sharpening drill bits)
1 x Wheel Dresser

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BEFORE USE
MOUNTING THE GRINDER ON A WORKBENCH
NOTE: We highly recommend that you bolt this bench grinder securely to a
workbench to gain maximum stability for your machine.
1. Using the base of the bench
grinder as a template, mark the
bench through the holes in the
casting.
2. Bolt the bench grinder to the
bench with bolts, washers and nuts
(not supplied).
3. To reduce vibration, mount the
bench grinder on a vibration
absorbing mat.
INSTALLING THE TOOL RESTS
1. Fix the tool rests to the bench
grinder with the screw and hand
knob as shown.
• The tool rests are adjustable
and should be positioned 1.5
mm from the grinding wheels.
• Ensure that the tool rest is firmly
fixed and horizontal.
• One of the tool rests has an
angled groove to allow you to sharpen the ends of drill bits.
INSTALLING THE SPARK DEFLECTORS
Fit both the spark deflectors to the
wheel guards using the screws
provided.
• Adjust the spark deflector
frequently to compensate for
wear of the wheel, keep the
distance between the spark
deflector and wheel as small as
possible and never more than
2mm.

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INSTALLING THE EYE SHIELDS
1. Attach the left eye shield arm to
the bench grinder using the
bracket, flat washer and bolt
supplied.
2. Fit the lens to the lens holder as
shown.
NOTE: One of the lenes has a
manifying window.
3. Repeat for right side eye shield.
• Adjust the eye shields to an
appropriate distance from the
tool rests avoiding interference
during operation.

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OPERATION
NOTE: Check that there is a 1.5 mm clearance between the tool rests and the
surface of the grinding wheel. Adjust as necessary.
NOTE: Check the gap between the spark deflectors and the surface of the
grinding wheel. These should also be a maximum of 2 mm. Adjust as
necessary.
NOTE: Check that the eyeshields have been secured in the correct position
and that the grinding wheel lock nuts are tight.
1. Stand to the side of the bench grinder and switch it on using the on/off
switch.
• Let the grinding wheel reach full speed before grinding.
• The wheel rotates in the same direction as the arrow stamped in the
side of the wheel guard.
2. Hold the work piece firmly against the tool rest. Hold very small pieces with
pliers or other suitable clamps.
3. Feed the work piece smoothly and evenly against the grinding wheel.
4. Always keep the work piece moving across the face of the wheel. Grinding
against the same part of the wheel will cause uneven wear of the wheel
face.
• Grind only on the face of the grinding wheel and never the side of it.
NOTE: Prolonged grinding will cause most tools to become hot. Use care
when handling hot tools.
5. Switch the bench grinder off using the on/off switch when you have
finished.
USING THE BUILT IN LIGHT
The built in light will come on automatically whenever the bench grinder is
switched on.
The arm can bend to set the light in a suitable position.
CAUTION: KEEP ALL BYSTANDERS A SAFE DISTANCE AWAY FROM THE
TOOL AND NOT IN DIRECT LINE, FRONT OR BACK OF THE GRINDER.
CAUTION: ALWAYS WEAR SAFETY GLASSES

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SHARPENING TIPS
SCISSORS
If possible, take the scissors apart to make the sharpening operation easier
and safer. Remove material only from the outside surface and work from the
handle end of the blade toward the tip.
KNIVES
Remove metal equally from both faces, working from the handle end of the
blade toward the tip.
MAINTENANCE
Keep the machine clean by wiping off dust with a clean cloth, and
occasionally blowing the grinder through with compressed air. Always wear
protective goggles when blowing through with compressed air.
The grinding wheel may need trueing or dressing occasionally. Only dress the
wheel with a proper dressing tool whilst wearing safety goggles or glasses. If in
doubt seek expert advice.
DRESSING THE WHEEL
When the wheels start to become clogged with debris, use the dresser tool
supplied to clean (dress) them.
1. Start the bench grinder running.
2. Place the dresser tool on the tool rest with the dresser wheels facing the
abrasive wheel.
3. Slide the dresser tool forward until contact is made with the abrasive wheel
and maintain a light pressure to clean the debris from the abrasive wheel.
4. After dressing, adjust the tool rests and spark deflectors as necessary.
WARNING: DISCONNECT THE GRINDER FROM THE MAINS SUPPLY BEFORE
FITTING REPLACEMENT WHEELS, CLEANING OR ADJUSTMENT.

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REPLACING THE GRINDING WHEELS
1. Loosen the screws shown and
rotate and remove the cover.
2. Hold the other wheel by hand, and
remove the nut and outer flange.
NOTE: The left hand grinding wheel
locking nut has a left handed
thread.
3. Slide off the old wheel and replace
with a new one.
• Use only wheels recommended by the manufacturer which have a
marked speed equal to or greater than the speed marked on the
nameplate of the tool.
• The disc should have maximum dimensions of 200 mm diameter, 20
mm thick with a bore size of 15.88 mm.
• Inspect the wheel for cracks, chips or any other visible damage,
damaged abrasive products must be destroyed and discarded.
4. Replace the outer flange.
• Make sure both wheel flanges
are placed with the concave
sides towards the wheel.
5. Replace the nut securely.
• Do not overtighten as this may
damage the grinding wheel.
6. Re-assemble the guards fully prior
to carrying out testing.
• Each time after mounting, the wheel should be test run for a
reasonable time (approximately 1 minute).
CHANGING THE LIGHT BULB
Remove the bulb by twisting it anticlockwise.
Replace with an identical bulb (12V, 10W, ES10 fitting) available from the
Clarke Parts Department.
WARNING: DO NOT USE DAMAGED GRINDING WHEELS.
WARNING: SWITCH THE GRINDER OFF AND DISCONNECT THE POWER
SUPPLY BEFORE CHANGING THE GRINDING WHEELS

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PARTS DIAGRAM

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PARTS LIST
1 Philips Screw Assembly WACBG8370L01
2 Left Guard Cover WACBG8370L02
3 I type Hex Nut WACBG8370L03
4 Wheel Flange WACBG8370L04
5 Wheel(36#) WACBG8370L05
6 Philips Screw WACBG8370L06
7 Standard Washer WACBG8370L07
8 Left Guard inner Cover WACBG8370L08
9 Left Spark Deflector WACBG8370L09
10 Flat Washer WACBG8370L10
11 Philips Screw WACBG8370L11
12 Left Eyeshield mount rod WACBG8370L12
13 Bracket WACBG8370L13
14 Flat Washer WACBG8370L14
15 Hex Bolt WACBG8370L15
16 I type Hex Nut WACBG8370L16
17 Flat Washer WACBG8370L17
18 Eyeshield press plate WACBG8370L18
19 Dome Screw WACBG8370L19
20 Philips Screw WACBG8370L20
21 Dressing tool WACBG8370L21
22 End cap WACBG8370L22
23 Motor housing WACBG8370L23
24 Wavy washer WACBG8370L24
25 Ball bearing WACBG8370L25
26 Stator WACBG8370L26
27 Capacitor WACBG8370L27
28 Rotor WACBG8370L28
29 Magnified eyeshield WACBG8370L29
30 Hex nut WACBG8370L30
31 Work Rest Lock knob WACBG8370L31
32 I type Hex Nut WACBG8370L32
33 Standard Washer WACBG8370L33
34 Flat Washer WACBG8370L34
35 Eyeshield WACBG8370L35
36 Nut WACBG8370L36
37 Wheel(60#) WACBG8370L37
38 Philips Screw WACBG8370L38
39 Toothed Locking Washer WACBG8370L39
40 Philips Screw WACBG8370L40
41 Cord bushing WACBG8370L41
42 Right Guard Inner Cover WACBG8370L42
43 I type Hex Nut WACBG8370L43
44 Capacitor Stand WACBG8370L44
45 Base Plate WACBG8370L45
46 Cord bushing WACBG8370L46
47 Cord & Plug WACBG8370L47
48 Lamp Assembly WACBG8370L48
49 Standard Washer WACBG8370L49
50 Nut WACBG8370L50
51 Switch Plate WACBG8370L51
52 Switch WACBG8370L52
53 Philips Screw WACBG8370L53
54 Big Flat washer WACBG8370L54
55 Rubber foot WACBG8370L55
56 Water tray WACBG8370L56
57 Base WACBG8370L57
58 Right work rest WACBG8370L58
59 Right Eyeshield mount
rod
WACBG8370L59
60 Left work rest WACBG8370L60
61 Hex nut WACBG8370L61
62 Bulb WACBG8370L62
63 Philips Screw Assembly WACBG8370L63
64 Flat washer WACBG8370L64
65 Standard Washer WACBG8370L65
66 Dressing tool base WACBG8370L66
67 Standard Washer WACBG8370L67
68 Right Guard Cover WACBG8370L68
69 Right Spark Deflector WACBG8370L69
70 Lock Nut WACBG8370L70

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DECLARATION OF CONFORMITY