Clarke CBG150 User guide

BENCH GRINDER

MODEL NO: CBG150

PART NO: 6500757

OPERATING & MAINTENANCE

INSTRUCTIONS

ORIGINAL INSTRUCTIONS GC11/23

INTRODUCTION

Thank you for purchasing this CLARKE Bench Grinder.

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

Weight 5.35 kg

Grinding Stone Dimensions 150 dia x 16 mm thick (12.7mm bore)

Grinding Stone grade 36 Coarse/60 Medium (max 4450 rpm)

Rated Voltage / Frequency 230 V / 50 Hz

Rated Input Wattage 150 W

No Load Speed 2980 rpm

Ingress protection rating IP30

Duty cycle classification S1 = 105W - S6 40% =150W

Product dimensions 290 x 230 x 200mm (guards & tool rest fitted)

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GENERAL SAFETY RULES

CAUTION: FAILURE TO FOLLOW THESE PRECAUTIONS COULD RESULT IN
PERSONAL INJURY, AND/OR DAMAGE TO PROPERTY.

WORK ENVIRONMENT

1. Keep the work area clean, tidy 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.

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. Avoid accidental starting. Ensure the switch is in the off position before
plugging in. Plugging in power tools that have the switch on invites
accidents.

3. DO NOT overreach. Keep proper footing and balance at all times. This
enables better control of the power tool in unexpected situations.

4. 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.

5. Eye protection manufactured to the current European safety standards
should be worn when operating grinding equipment. Eye protectors must
provide protection from flying particles from the front and the side.

GENERAL USE AND CARE OF POWER TOOLS

1. ALWAYS check for any damage or condition that could affect the
grinder’s operation. Any damaged part should be properly repaired.

2. NEVER use the grinder if it is defective or operating abnormally.

3. NEVER abuse the mains cable. NEVER yank the cable to disconnect it from
the socket. Keep the cable away from sharp edges/hot surfaces.

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4. NEVER carry out any alterations or modifications to this product.

5. NEVER wipe the machine clean with solvents. Wipe plastic parts with a soft
cloth, slightly dampened with soapy water.

6. NEVER attempt any repairs yourself. If you have a problem with this product
contact your local CLARKE dealer.

7. DO NOT use the tool for any purpose than that described in this manual.

8. ALWAYS maintain the tool with care. Keep it clean for the best and safest
performance.

9. DO NOT force the power tool. Use the correct power tool for your
application. The correct power tool will do the job better and safer at the
rate which it was designed.

10. 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.

11. Store idle tools out of the reach of children and do not allow persons
unfamiliar with the power tool or these instructions to operate the power
tool. Power tools are dangerous in the hands of untrained users.

12. Maintain power tools. Check for misalignment or binding of moving parts,
breakage of parts and any other condition that may affect the power
tools operation. If damaged, have the power tool repaired before use.
Many accidents are caused by poorly maintained power tools.

13. Use the power tool and accessories in accordance with these instructions
and in the manner intended for the particular type of power tool, 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.

ELECTRICAL SAFETY

1. Power tool plugs must match the outlet. NEVER modify the plug in any way.
DO NOT use adapter plugs with earthed (grounded) power tools. Correct
plugs and matching outlets will reduce the risk of electric shock.

2. 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.

3. DO NOT expose power tools to rain or wet conditions. Water entering a
power tool will increase the risk of electric shock. If operating the power
tool in a damp location is unavoidable, use a residual current device
(RCD) protected supply.

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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.

GRINDING STONE SAFETY

1. Check the speed of the grindstone before fitting to your grinder. NEVER use
a stone with a rpm speed less than the rpm speed of your grinder. See
specification on page 2.

2. The outside diameter and thickness of your accessories must be within the
capacity rating of the power tool. The correct size accessories can be
correctly guarded and controlled.

3. NEVER use a stone that is chipped, cracked or damaged. Fragments from
a broken or damaged grinding stone can cause serious injury. Make sure
that defective stones are destroyed and not used.

4. Bonded abrasive products are breakable and shall therefore be handled
with utmost care. The use of damaged or improperly mounted or used
abrasive products is dangerous and can cause serious injuries.

5. ALWAYS refer to the label for specified usage and observe the safety
information. DO NOT use for purposes other than specified.

6. ALWAYS use the correct stone for it’s intended task. Using the incorrect
stone can cause serious injury.

7. Allow the stone and tool to do the work. NEVER force the workpiece
against the stone as this could cause kickback and/or shatter the stone
causing serious injury.

8. DO NOT use separate reducing bushes or adapters to adapt large hole
abrasive wheels. DO NOT force a stone onto a machine or alter the size of
the arbor hole.

9. NEVER use a damaged grinding stone. Inspect the stone before each use
for chips, cracks or excess wear. If the tool or accessory is dropped, inspect
for damage or install a new accessory. After fitting the accessory, position
yourself away from the plane of the rotating accessory and run the tool at
full speed. Damaged stones may break apart during this test.

10. Abrasive products shall be handled and transported with care. Abrasive
products shall be stored in such a manner that they are not subjected to
mechanical damage and harmful environmental influences.

BENCH GRINDER SAFETY WARNINGS

1. Hold a hand tool or blade being sharpened firmly to prevent loss of control.

2. NEVER install a abrasive flap wheel or sanding disc on this grinder.

3. ALWAYS replace a cracked grinding wheel immediately.

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4. NEVER use damaged or incorrect grindstones. The stone and retaining
fixtures 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 found.

5. ALWAYS use the tool rests to steady the workpiece, the torque of the
spinning grinding wheel may pull the workpiece from your hands.

6. ALWAYS check for damaged parts. Before further use any 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 center. Following this rule will
reduce the risk of electric shock, fire or serious injury.

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.

Please keep these instructions in a safe place for future reference.

SAFETY SYMBOLS

The meanings of the markings and symbols on the product are shown below

Read this manual
before use and keep
in a safe place for
future reference

Wear ear protection
when grinding.

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Wear eye protection
when using this tool.

Wear dust mask.

ELECTRICAL CONNECTIONS

Plug must be BS1363/A approved.

Always fit

Ensure that the outer sheath of

Neutral

(Blue)

Live

(Brown)

Earth

(Green and

a 5 Amp

the cable is firmly held by the clamp

fuse.

Yel low)

WARNING! READ THESE ELECTRICAL SAFETY INSTRUCTIONS FULLY

BEFORE CONNECTING THE MACHINE TO THE MAINS SUPPLY.

This machine is provided with a standard 13 amp, 230 volt (50Hz), BS 1363 plug,
for connection to a standard, domestic electrical supply. Should the plug
need changing, make sure that a plug of identical specification is used.

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

If the colours of the wires in the power cable do not agree with the markings
on the plug:

• Connect the blue wire

to the terminal which
is marked N.

• Connect the brown

wire to the terminal
which is marked L.

• Connect the yellow

and green wire to the
terminal which is

marked E or .

We strongly recommend that this machine is connected to the mains supply
through a Residual Current Device (RCD)

If you are not sure, consult a qualified electrician. DO NOT try to do any
repairs.

CABLE EXTENSIONS

Always use an approved cable extension suitable for the power rating of this
machine. The conductor size should also be at least the same size as that on
the machine, or larger and should have an earth conductor.

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OVERVIEW

The following items should be supplied with the bench grinder. If any items are
missing or damaged, please contact the CLARKE dealer where you
purchased the product.

• Two eye shield assemblies (each with nut, bolt, spring washer & 2 x

flat washers)

• Two tool rests (each with knob, screw, spring washer & flat washer)

• Hand knobs and fixings for the above

• Coarse wheel (fitted)

• Medium wheel (fitted)

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ASSEMBLY

1. Fix the tool rests with the locking
knobs short coach bolts and
washers provided, as shown in
Fig.1.

• The tool rests are adjustable

and should be positioned

2.5mm (1/8") from the grinding
wheels. Ensure that the tool rest
is firmly fixed and horizontal.

• As the wheel wears down with

use, it will be necessary to re-adjust the toolrest brackets in order to
maintain a gap between the rest and the wheel.

2. Assemble the eye shields on to the
brackets using the nuts, screws
and washers supplied, as shown in
Fig.2.

• The angle for the eye shields

can be adjusted to suit the
operator.

IMPORTANT: We recommend that your bench grinder is secured to your
workbench before operation, using the pre-drilled holes in the base. DO
NOT overtighten the mounting bolts as this could damage the base. Position
the machine in good light.

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USING YOUR BENCH GRINDER

WARNING: FRAGMENTS FROM A BROKEN/DETACHED GRINDING WHEEL
CAN CAUSE INJURY.

WARNING: ENSURE THAT THE WORKING POSITION ADOPTED DOES NOT
CAUSE OPERATOR FATIGUE WHICH MAY LEAD TO LOSS OF CONTROL OF
THE TOOL BEING GROUND.

WARNING: THE WHEEL WILL CONTINUE TO ROTATE BRIEFLY AFTER THE OFF
SWITCH HAS BEEN PRESSED.

GENERAL USE

1. To start/stop the grinder, press the ON/OFF switch and start work.

2. Press the tool blade evenly onto the grinding stone and move the tool
sideways across the stone. Make sure that at least half the width of the tool
cutting edge comes into contact with the grinding stone at any time to
avoid damage to the stone.

3. Allow the stone to do the work. DO NOT apply excessive downward
pressure on the tool when grinding.

EYESHIELD ADJUSTMENT

The transparent eye shields allow the user to see the work clearly and to work
precisely. The eye shields can be adjusted up and down as required.

The brackets should be adjusted so that they are as close as possible to the
grinding wheel without impairing the wheels rotation.

IMPORTANT: Even though the eye shields are fitted, you should nevertheless
wear safety goggles when operating a bench grinder.

TOOLREST ADJUSTMENT

The appropriate adjustment of the tool rests provides the operator with a
correct working angle and a firm and efficient base for working. Adjustments
can be made by loosening the mounting screws and moving the tool rest to
within 1.6mm (1/16”) from the wheel.

Due to the wear on the grinding wheel, it will be necessary to adjust the tool
rests from time to time. Always re-tighten the mounting thumbscrews once
adjustment is complete.

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MAINTENANCE

GENERAL MAINTENANCE

Make sure that all components are tight and secure. Always have any
damaged or worn parts repaired or replaced by qualified service personnel.
DO NOT attempt to repair the grinder unless you are qualified to do so.

The drive motor and bearings are sealed units and require no regular
maintenance. Should you require assistance, contact your local CLARKE
service agent.

The stone will wear down with use and may well go out of true. Use a dressing
wheel or stone grader to correct the trueness and to remove worn, glazed
grains from the stone.

The stone will have a finite life expectancy, dependant upon the nature of the
work being done. Periodically, make a note of the wheel diameter and
replace your (150mm) dia wheel if it reduces to an little as (130mm) in
diameter.

INSTALLING A NEW GRINDING STONE

CAUTION: NEVER RE-START THE GRINDER WITHOUT THE GUARDS
INSTALLED.

To renew or change the grinding wheels, proceed as follows

1. Switch off and un-plug from power supply. Remove the outer covers, left or
right, by removing the three cover retaining screws.

2. Hold the grinding wheel firmly and remove the nut and flange from the
shaft, noting that the left hand wheel nut has a left hand thread.

3. Take off the used wheel and replace with the new one, ensuring:

• the paper label/blotters are in place either side of the wheel.

• that there is a good balanced rotation of the grinding wheel

• you do not overtighten the wheel nut.

4. Re-fit covers, left or right, by using the three cover retaining screws.

5. Re-adjust the tool rest and spark arrester brackets if required.

6. Switch the machine on and allow it to rotate freely for at least one minute.

Replacement grinding stones are available from your CLARKE dealer.

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DRESSING A NEW STONE

New grinding stones are frequently not true or in time can become grooved,
glazed (built-up), out of round or otherwise mis-shapen. To correct these
defects, a grinding stone dresser is available from your CLARKE dealer.

• ET125 Grinding Wheel Dresser - Part No:1700225

• Replacement Dresser Wheel - Part No:1700230

• ET154 ½ Carat Diamond Tip Wheel Dresser - part No:1700329

1. If the grinding stone is new, allow it to spin for a minute with no load. Check
that it is spinning straight and true. If not, it will require dressing before use.

2. Stand to the side of the stone and hold the dresser handle firmly. Place the
dresser on the tool support so that its wheels can move freely (i.e, the
exposed part of the wheel should be facing up). Run the stone and apply
the dresser to the surface of the stone.

CLEANING & STORAGE

Clean the exterior the machine if required using a mild detergent or mild
solvent. Never immerse the machine in water. To reduce any fire hazard, keep
any cooling vents in the grinder free of debris.

If not bolted to a workbench, store the grinder in a clean, dry location, out of
reach of children.

ENVIRONMENTAL PROTECTION

Do not dispose of this product with general household waste. All
tools, accessories and packaging should be sorted, taken to a
recycling centre and disposed of according to the laws governing
Waste Electrical and Electronic Equipment.

Through the purchase of this product, the customer is taking on the obligation
to deal with the WEEE in accordance with the WEEE regulations in relation to
the treatment, recycling & recovery and environmentally sound disposal of
the WEEE.

In effect, this means that this product must not be disposed of with general
household waste. It must be disposed of according to the laws governing
Waste Electrical and Electronic Equipment (WEEE) at a recognised disposal
facility.

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DECLARATIONS OF CONFORMITY

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COMPONENT PARTS

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COMPONENT PARTS

No Description No Description

1 Grinding wheel

2 Bolt/nut washer 27 Washer

Screw 28 Hand knob

3

4 Eyeshield bracket 29 Spring washer

5Washer 30

6 Spring washer 31 Switch

7 Nut 32 Tooth washer

8 Eyeshield

9Bearing 34Screw

10 Base 35

11 Motor rotor

12 Motor stator 37 Screw

Nameplate 38 Spring washer

13

14 Closing ring 39 Capacitor

15 Cover 40 Screw

16 Right inner guard 41 Power cable & plug

Pressing plate 42 Left inner guard

17

Wheel flange 43 Nut

18

19 Wheel branding 44

20 Grinding wheel

21 Nut

22 Right outer guard

23 Screw

24 Coachbolt

25 Right tool rest

26 Tooth washer

Bolt/nut washer

33 Ground terminal

Rubber foot

36 Base plate

Left outer guard

45 Left tool rest

46 Screw

47 Cable adaptor

48 Screw

49 Cable clip

Replacement 150mm grinding wheels are available:

• Coarse; part no 6501070

• Medium: - part no 6501054

• Fine; - part no 6501053

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