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CHD 850
User guide
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Clarke CHD 850, 6479500 User guide

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CHD850 Hammer Drill rev 4.fm Page 1 Monday, February 9, 2015 10:47 AM
850W HAMMER DRILL
MODEL NO: CHD850
PART NO: 6479500
OPERATION & MAINTENANCE
INSTRUCTIONS
GC0215
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INTRODUCTION

Thank you for purchasing this CLARKE Hammer Drill.
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.

ENVIRONMENTAL PROTECTION

Recycle unwanted materials instead of disposing of them as waste. All tools, accessories and packaging should be sorted, taken to a recycling centre and disposed of in a manner which is compatible with the environment.
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SAFETY PRECAUTIONS

WARNING: READ ALL INSTRUCTIONS. FAILURE TO FOLLOW ALL INSTRUCTIONS LISTED BELOW MAY RESULT IN ELECTRIC SHOCK, FIRE AND/ OR SERIOUS INJURY. THE TERM “POWER TOOL” IN ALL WARNINGS LISTED BELOW REFERS TO YOUR 850W HAMMER DRILL.

WORK AREA

1. Keep 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. Avoid body contact with earthed or grounded surfaces such as pipes, radiators, ranges or refrigerators. There is an increased risk of electric shock
if your body is earthed or grounded.
2. Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.
3. When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of
electric shock.

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, or hearing protection used for appropriate conditions will reduce personal injuries.
3. Avoid accidental starting. Ensure the switch is in the off position before connecting to the power supply.
4. Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations.
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5. 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.

POWER TOOL USE AND CARE

1. 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.
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 battery before making any adjustments, 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 the power tool. 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 tools operation. If damaged, have the power tool repaired before use. Many
accidents are caused by poorly maintained power tools.
6. Keep cutting tools sharp and clean. Poorly maintained cutting tools with
sharp cutting edges are less likely to bind and are easier to control.
7. 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.

HAMMER DRILL SAFETY INSTRUCTIONS

1. Only use the drill in the manner and for the functions described.
2. Using the correct bit. Use the appropriate drill bit for the material being drilled. Different bits are available from your Clarke dealer.
3. Use of the mains cable. Keep the mains cable well away from the drill and ensure an adequate electrical supply is close at hand so that the operation is not restricted by the length of the cable.
4. Working on the bench. Allow sufficient clearance beneath the work to ensure the drill bit does not come into contact with the floor, table etc.
5. Switching off. Never place the drill on a table or bench if it has not completely stopped. The drill bit will continue to rotate for a short time after the trigger has been released to stop the drill.
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6. Drilling into walls. Do not drill into walls or cavities before checking for hidden electrical wires or water pipes etc.
7. Finishing drilling. Do not touch the drill bit immediately after use, allow time for it to cool.
8. Use outdoor extension leads. If working outdoors, always use an approved cable extension suitable for the power rating of this tool (see specifications), the conductor size should also be at least the same size as that on the machine, or larger. When using a cable reel, always unwind the cable completely. We strongly recommend that this machine is connected to the mains supply via a Residual Current Device (RCD).
9. Cooling agents. When drilling metals, always use a cooling agent i.e. cutting/soluble oil.

SERVICE

1. Have your power tool serviced by a qualified repair person using only identical replacement parts. This will ensure that the safety of the power
tool is maintained.
Additionally, please keep these instructions in a safe place for future reference

SPECIFICATIONS

Item Specification
Operating Modes Drill or Drill & Hammer Action/Reverse
Chuck Capacity 1.5 mm -13 mm
Rated No-load Speed 0-2900 rpm
Weight 3.35 kg
Dimensions (L x W x H) 298 x 70 x 204 mm
Operating voltage & Frequency 230V~50Hz
Fuse rating 13 A
Motor Power 850 W
Sound Pressure Level 92.0 dB LpA
Sound Power Level 103 dB L
Vibration Level 8.59 m/s
5
WA
2
Plug must be BS1363/A approved.
Always fit a 5 Amp fuse.
Ensure that the outer sheath of the cable is firmly held by the clamp
Neutral
(Blue)
Live
(Brown)
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ELECTRICAL CONNECTIONS

WARNING! Read these electrical safety instructions thoroughly before connecting the product to the mains supply.
This product battery charger 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 at any time, ensure 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
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 N or coloured Black.
• The wire which is coloured Brown must be connected to the terminal which is marked L or 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.
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OVERVIEW

The CLARKE CHD850 is a variable-speed drill for DIY use. It is equipped with a variable speed controller and hammer operation and has a lock-on button for continuous operation. The drill is supplied with a depth stop rod and auxiliary handle.
When unpacking, check for damage or shortages etc. Any found should be reported to your CLARKE dealer where the drill was originally purchased. This CHD850 Drill is supplied with the following components:
• 1 x Impact Drill
• 1 x Chuck Key
• 1 x Depth Stop Rod
• 1 x Auxiliary (Side) Handle
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OPERATION

IMPORTANT: To avoid accidental starting, ensure the drill is switched OFF before plugging in to the mains. To do this, briefly pull the switch, and release to ensure the trigger lock is not set in the ‘lock’ position.

INSERTING A DRILL BIT

1. Open the chuck by rotating the chuck sleeve anticlockwise until the jaws are open sufficiently to take the drill bit.
2. Place the drill bit in the jaws of the chuck as far as it will go.
3. Insert the chuck key in one of the three holes in the chuck and tighten in a clockwise direction.
• Make sure that the head of the
chuck key is located on the cog barrel of the chuck when tightening.
WARNING: REMOVE THE CHUCK KEY BEFORE OPERATING THE DRILL.
• To remove the bit, release the jaws by inserting the chuck key in one
of the holes and turning in an anticlockwise direction.

SWITCHING ON & CONTINUOUS OPERATION

1. Plug into a 13amp socket and squeeze the trigger to start the drill.
2. During use, press the trigger lock-on button and the drill will run continuously. Squeeze the trigger again briefly to release the trigger lock & stop the drill.
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HAMMER DRILL SELECTION
Rotate the drill/hammer drill mode selection switch so that the ‘Hammer’ symbol is aligned with the arrow on the drill body.

NORMAL DRILL SELECTION

Rotate the drill/hammer drill mode selection switch so that the ‘Drill’ symbol is aligned with the arrow on the drill body.
NOTE: Both these operations should only be performed when the drill is at a complete stop.

FORWARD / REVERSE SELECTION

1. Set the forward/reverse selector switch to the position marked ‘R’ for normal ‘Right Hand’ rotation for drilling holes.
2. Set the forward/reverse selector switch to the position marked ‘L’ for ‘Left Hand’ rotation to reverse the drill out of the workpiece.
NOTE: This operation should only be performed when the drill is at a complete stop.

SPEED SELECTION

1. Turn the selector knob until the number is aligned with the arrow on the drill body).
NOTE: This operation should only be performed when the drill is at a complete stop.
• The maximum speed may be
selected by turning the variable speed control in the centre of the trigger.
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AUXILIARY HANDLE AND DEPTH STOP

The depth stop is fitted within the auxiliary handle and can only be used if this handle is installed.
1. Slide the handle assembly over the chuck and onto the body of the drill.
2. Rotate the handle to the desired position and secure in position by twisting clockwise.
3. Insert the depth stop rod through the holder in the handle assembly.
• To set the depth stop, slide the rod in and out to the required position
and lock in place by turning the thumbscrew clockwise.

GENERAL DRILLING TECHNIQUE

• After drilling material to the full depth, maintain chuck rotation to
ease drill withdrawal.
• Always drill directly in line with the bit. Do not use sideways
movement as this may damage the drill or cause the bit to break.
• If the drill is not cutting the metal then sharpen the drill bits, ensuring
the various cutting angles are correct.
• Always use sharp, good quality drill bits. The performance of your drill
is dependant on the quality of the bits used.
• Reduce the pressure on the drill bit when it is about to break through.
This will prevent the drill from jamming.
• If drilling a large hole, first drill a pilot hole using a smaller drill bit.
• Always apply pressure to your drill bit in a straight line and, where
possible, at right angles to the workpiece.
• When drilling holes or driving screws into walls, floors etc., always
make sure that there are no live electrical wires in the path of the bit.
• When drilling in metal, the materials being drilled can become hot.
To reduce overheating use a suitable cooling lubricant. No cooling lubricant is necessary when drilling cast iron or brass as they should be drilled dry.
• When drilling metal, the harder the metal the slower the drill speed.
Similarly, the bigger the drill bit the slower the speed.
• Always start drilling at a slow speed to prevent the drill from slipping
out of the pop mark or indent, gradually increasing speed until the
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optimum cutting speed is achieved whilst maintaining a MODERATE pressure ONLY. NEVER force the drill bit into the work. This will overheat the tip and cause it to dull very quickly.
• To prevent the drill bit from slipping when starting to drill a hole in metal, use a centre punch to make an indentation at the start point.
• When drilling in wood, clamp a piece of scrap wood to the underside of the material to avoid splintering.
• Always drill directly in line with the bit. Do not use sideways movement as this may damage the drill or cause the bit to break.
• Large holes should be drilled with wood augers, flat wood bits or hole saws.

MAINTENANCE

Before commencing any maintenance procedures, always ensure the drill is isolated from the electrical supply by switching off and removing the plug from the socket.

BEFORE USE

1. Ensure all fixing screws remain tight to ensure the drill is in safe working condition.
2. Inspect the power cable to ensure it is sound and free from cracks, bare wires etc.

CLEANING

1. Ensure all air ventilation slots are clear of blockages, (use compressed air to clean the machine if possible).
2. After use, clean all dust and swarf from the drill.
3. Clean the exterior of the drill with a soft cleaning cloth. Never use any chemicals or harsh abrasives to clean the tool.
• Avoid using solvents when cleaning plastic parts, most plastics are
susceptible to damage from the various types of commercial solvents.

GENERAL MAINTENANCE

• All bearings etc, in this tool are lubricated with a sufficient amount of
high grade lubricant for the tools lifetime under normal operating conditions, therefore no further lubrication is necessary.
• Refer to your CLARKE dealer if internal maintenance is required.
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FAULTFINDING

Problem Possible Cause Remedy
Tool will not operate No power supply Check supply & rectify as
necessary
Switch is faulty Consult your Clarke
dealer
Fuse blown Check & replace if neces-
sary
Motor is faulty Consult your Clarke
dealer
Motor runs but drill bit does not move.
Heavy internal sparking Faulty motor Consult your Clarke
Motor becomes hot Unduly heavy use Reduce the force applied
Excessive vibration. Drill bit bent or not
Drill fastening not tight. Secure drill bit.
Drive gear broken Consult your Clarke
dealer
dealer
Warn brushes Consult your Clarke
dealer
to the tool. Let the tool do the work.
Air vent have become blocked.
Low supply voltage Ensure supply voltage is
mounted correctly.
Machine bearings worn. Consult your Clarke
Clean out the air vents using compressed air or clean with a dry cloth.
correct. If an extension cable is used, ensure it is the correct rating and is fully unwound.
Check and rectify.
dealer
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COMPONENT PARTS LIST

No Description No Description
1 Power Cable 21 Loose Rib 12mm
2 Cable Sleeve 22 Bearing
3 X-head Screw 23 Impact Spring
4 Cable Clamp 24 Drive Spindle
5 Capacitor 25 Woodruff Key
6 Trigger Assembly 26 Key Holder
7 Carbon Brush Holder 27 Spring
8 Spring 28 Impact Selector
9 Carbon Brush 29 Casing (LH)
10 Inductor 30 Air Vent
11 X-head Screw 31 Casing (RH)
12 Motor Stator 32 Casing Screw (top)
13 Motor Bearing 33 Casing Screw (rear)
14 Motor Armature 34 Casing Screw (front)
15 Motor Drive Bearing 35 Chuck
16 Drive Support Block 36 Chuck Retaining Screw
17 Oilite Bush 37 Auxiliary Handle
18 Steel Ball 38 Depth Stop Rod
19 Loose Rib 9mm 39 n/a
20 Spur Gear 40 Chuck Key
When ordering spare parts please quote the reference WG/CHD850 followed by the number above.
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COMPONENT PARTS

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DECLARATION OF CONFORMITY

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