Clarke METALWORKER CBS20 User manual

OPERATION & MAINTENANCE
INSTRUCTIONS
ORIGINAL INSTRUCTIONS DL0822
ELECTRIC DRILL BIT SHARPENER
MODEL NO: CBS20
PART NO: 6480231

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Parts & Service: 020 8988 7400 / E-mail: [e-mail] or [e-mail]
INTRODUCTION
Thank you for purchasing this CLARKE Electric Drill Bit Sharpener.
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.
IMPORTANT
Please read all of the safety and operating instructions carefully before using
this product. Please pay particular attention to all sections of these instructions
that display warning symbols and notices.
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.
WARNING: THIS IS A WARNING SYMBOL. THIS SYMBOL IS USED
THROUGHOUT THE USER GUIDE WHENEVER THERE IS A RISK OF
PERSONAL INJURY. ENSURE THAT THESE WARNINGS ARE READ AND
UNDERSTOOD AT ALL TIMES.

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PRODUCT OVERVIEW
NO. DESCRIPTION
1 Grinding Stone Height Adjustment Knob
2HeadAssembly
3On/OffSwitch

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SAFETY SYMBOLS
ENVIRONMENTAL RECYCLING POLICY
Through 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.
GENERAL SAFETY RULES
1. KEEP WORK AREA CLEAN. Cluttered areas invite injuries. Keep work area
well lit.
2. NEVER use power tools in damp, wet, or poorly lit locations. DO NOT expose
to rain. DO NOT use electrically powered tools in the presence of
flammable gases or liquids.
3. KEEP CHILDREN AWAY. Children must never be allowed in the work area. DO
NOT let them handle machines, tools, or extension cable.
Read instruction
manual before use
Wear Eye Protection
Class 2 Double
Insulated
Indoor Use Only
WARNING: WHEN USING ELECTRIC TOOLS, MACHINES, OR EQUIPMENT,
BASIC SAFETY PRECAUTIONS SHOULD ALWAYS BE FOLLOWED TO REDUCE
THE RISK OF FIRE, ELECTRIC SHOCK AND PERSONAL INJURY.

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Parts & Service: 020 8988 7400 / E-mail: [e-mail] or [e-mail]
4. STORE IDLE EQUIPMENT. When not in use, tools should be locked up in a dry
location to inhibit rust. Always lock up tools and keep out of reach of
children.
5. DO NOT FORCE THE TOOL. It will do the job better and more safely at the
rate for which it was intended.
6. DRESS CORRECTLY. DO NOT wear loose clothing or jewellery which could be
caught in moving parts. Wear a hair net if you have long hair.
7. USE EYE, EAR AND HAND PROTECTION. Always wear approved impact
safety goggles.
8. DO NOT ABUSE THE POWER CABLE. DO NOT yank it to disconnect it from the
socket. DO NOT carry tools by the cable.
9. DISCONNECT POWER. Unplug when not in use, before servicing, and when
changing accessories.
10. AVOID UNINTENTIONAL STARTING. Be sure the switch is in the OFF position
when not in use and before plugging in.
11. STAY ALERT. Watch what you are doing, use common sense. DO NOT
operate any tool when you are tired.
12. DO NOT OPERATE TOOL IF UNDER THE INFLUENCE OF ALCOHOL OR DRUGS. If
there is any doubt, DO NOT operate the tool.
13. CHECK DAMAGED PARTS. Before using any tool, any part that appears
damaged should be carefully checked to determine that it will operate
properly and perform its intended function. DO NOT use the tool if the
switch does not turn the tool on and off correctly.
14. GUARD AGAINST ELECTRIC SHOCK. Prevent body contact with grounded
surfaces such as pipes, radiators.
15. REPLACEMENT PARTS AND ACCESSORIES. When servicing, use only identical
replacement parts. Use of any other parts will void the warranty. Only use
accessories intended for use with this tool.
16. KEEP AWAY FROM LIQUIDS. This tool is designed for dry sharpening
operations only. DO NOT use any sharpening oils.
17. HEAT PRODUCED WHEN SHARPENING. The sharpening head and any bits
being sharpened will become hot. Be careful when handling; allow drill tips
to cool before storing.

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TOOL SPECIFIC SAFETY RULES
1. Make sure that flammable materials or materials that may explode are
kept out of the immediate vicinity.
2. DO NOT overload the tool. Only use the device for its intended purpose.
3. Make sure you are positioned firmly and with a natural stance when
working with the tool.
4. Make sure the grinding stone and head assembly are correctly seated and
installed before switching on the tool.
5. Prevent overheating of the tool and the drill bit.
6. Guide the mains cable in such a way that it cannot be caught by the tool.
7. NEVER remove too much material in a single process. It is better to remove
small amounts in multiple processes.
8. The tool should only be operated by a single operator at any one time.
9. ALWAYS wait until the grinding stone has come to a standstill before
removing contamination, etc. from the working area/tool.
10. NEVER leave the tool to run unattended.
11. Only use grinding stones that are in perfect condition.
12. Remember that moving parts may be located behind ventilation and
venting slots.
13. Ensure that the ventilation slots are always free of obstructions.
14. Check the grinding stone before each use. DO NOT use the device if the
grinding stone is broken, has a crack or is damaged in any other way.
Handle and store the grinding stone with care.
15. Make sure that the grinding stone is correctly fitted and secured. Allow the
device to operate in idle for 30 seconds in a safe location. Immediately
stop the device if there are faults.
16. Symbols affixed to your device SHOULD NOT be removed or covered.
Information on the device that is no longer legible should be replaced
immediately.

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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.
•TheBlue wire must be connected to the terminal marked Nor
coloured Black.
•TheBrown wire must be connected to the terminal marked Lor
coloured Red.
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.
This symbol indicates that this is a Class II product, and does not require
an earth connection.
WARNING! Read these electrical safety instructions thoroughly
before connecting the product to the mains supply.
Plug must be BS1363/A approved.
Always fit a 3 Amp fuse.
Ensure that the outer sheath of the cable is firmly held by the clamp
Neutral
(Blue)
Live
(Brown)

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OPERATIONS
BEFORE EACH USE
CORRECTLY SHARPENED BITS
Your bit is correctly sharpened when it has the following characteristics.
• A sharp point in the center of the bit.
• Two sharp and equal cutting edges
• Two trailing edges that are slightly lower than the cutting edges.
ADJUSTING THE GRINDING STONE
1. Turn the grinding stone height
adjustment knob clockwise to
raise the stone.
• This will give you a more
aggressive cutting action. This is
also useful when you are
working with short bits.
2. Lower the stone by turning the
adjusting knob anti-clockwise.
• This will produce a finer ground
edge, though it will take longer and require more repetitions.
SHARPENING PROCEDURE
NOTE: This sharpener uses a dry grinding stone. DO NOT use any
sharpening oils or lubricants with this tool.
What How
Check the power cable and plug for
damage
Conduct a visual inspection and
have the cable replaced by an
electrician if necessary.
Check the grinding stone Visual check, Change the grinding
stone if necessary (see page 10).
Cleaning the device Wipe the unit with a damp cloth.
Remove grinding residue with a dry
brush.

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WARNING: THIS SHARPENER SHOULD ONLY BE USED TO SHARPEN HSS DRILL BITS.
CARBIDE, COBALT AND TITANIUM DRILL BITS SHOULD NOT BE SHARPENED USING
THIS TOOL.
1. Place sharpener on a flat, sturdy surface and plug in.
2. Put a single drill bit (HSS only) into the appropriate hole (3mm - 12mm).
3. Using the height adjustment knob, raise (clockwise) or lower (anti-
clockwise) the grinding stone until it touches the drill bit (see ‘Adjusting the
Grinding Stone’ on page 8).
NOTE: Do not raise the grinding stone too far as this may damage the
housing.
4. Turn the unit on.
• Exert a slight downward pressure
onto the bit and rotate the bit
back and forth about 20 degrees
while sharpening. Each hole is
fluted to help with the rotation.
• The bit must be kept in motion
whilst in the machine to avoid
uneven sharpening.
5. Turn unit off after approximately 5-10
seconds of sharpening.
• Examine the drill bit according to
the “Sharpening Hints” section below.
6. Ensure both sides of the drill bit are sharpened using the same amount of
time and pressure.
7. Repeat the above steps as necessary.
8. DO NOT run the machine for longer than 3 minutes at a time.
NOTE: Pre-treat heavily damaged bits by coarsely grinding on a
sharpening stone first.
SHARPENING HINTS
• If the tip of bit starts to turn blue, it is overheating. Reduce the
amount of pressure and sharpening time. Cool the bit in water
between sharpening cycles.
• If one edge is longer than the other, sharpen the drill bit a little more.
• If you are sharpening a broken (rather than blunt) bit and the time
required to restore the shape is too long, rough the bit into shape first
using a bench grinder.

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MAINTENANCE & TROUBLESHOOTING
CHANGING THE GRINDING STONE
1. Make sure that the sharpener is switched off and disconnected from the
mains power supply.
2. Remove the four screws that hold
the head assembly in place and
remove the head assembly.
3. Remove the grinding stone
assembly.
• Make sure the spring
underneath stays in place
around the flat sided spindle.
4. Unscrew the nut from the wheel
base by turning anti-clockwise.
5. Pop out the wheel base and
washer and remove the worn
grinding stone.
6. Place new grinding stone onto
the wheel base, replace the
washer, and screw the nut back in
place.
7. Replace wheel assembly onto the unit.