EDX DW20 User manual

For your personal safety,
READ and UNDERSTAND before using.
SAVE THESE INSTRUCTIONS FOR
FUTURE REFERENCE.
DW10
DW20

2
Speed Adjustor Thumb Wheel
On/Off Switch
Sanding Head
Vacuum Swivel Mount
Hose
Model DW20 DW10
Length 1540mm (Long-Reach type) 1090mm (Compact type)
Voltage 115V / 60Hz or 230V /50Hz
No load speed 650 ~1600/min 650 ~1600/min
Full load speed 280 ~ 950/min 280 ~ 950/min
Power input 550W 550W
Sanding disc diameter 225mm 225mm
Net weight 4.7 kg (10 lbs.) 3.8 kg (8.4 lbs)
Hose Protection Device
(Optional)
Sponge
D-Handle(Optional)
Brush Cap
Soft Grip

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. The term
“power tool” in all of the warnings listed
below refers to your mains-operated
(corded) power tool.
SAVE THESE INSTRUCTIONS.
Work area safety
Keep your work area clean and well lit.
Cluttered worksites and dark areas invite
accidents.
Do not operate power tools in explosive
atmospheres, such as in the presence of
flammable liquid, gases, or dust. Power tools
create sparks which may ignite the dust or
fumes.
Keep bystanders, children, and visitors away
while operating a power tool. Distractions
can cause you to lose control.
Electrical Safety
Grounded tools must be plugged into an
outlet properly installed and grounded in
accordance with all codes and ordinances.
Never remove the grounding prong or
modify the plug in any way. Do not use any
adaptor plugs. Check with a qualified
electrician if you are in doubt as to whether
the outlet is properly grounded. If the tools
should electrically malfunction or break
down, grounding provides a low resistance
path to carry electricity away from the user.
Avoid body contact with grounded surfaces
such as pipes, radiators, ranges and
refrigerators. There is an increased risk of
electric shock if your body is grounded.
Don’t expose power tools to rain or wet
conditions. Water entering a power tool will
increase the risk of electric shock.
Don’t abuse the cord. Never use the cord to
carry the tools or pull the plug from an outlet.
Keep cord away from heat, oil, sharp edges
or moving parts. Replace damaged cords
immediately. Damaged cords increase the
risk of electric shock.
When operating a power tool outside, use an
outdoor extension cord marked “W-A” or
“W.” These cords are rated for outdoor use
and reduce the risk of electric shock.
Personal Safety
Stay alert, watch what you are doing and use
common sense when operating a power
tool. Do not use tool while tired or under the
influence of drugs, alcohol, or medication. A
moment of inattention while operating
power tools may result in serious personal
injury.
Use safety equipment. Always wear eye
protection. Safety equipment such as dust
mask, non-skid safety shoes, hard hat, or

4
hearing protection used for appropriate
conditions will reduce personal injuries.
Avoid accidental starting. Be sure switch is
off before plugging in. Plugging in tools that
have the switch on invites accidents.
Remove adjusting keys or switches before
turning the tool on. A wrench or a key that is
left attached to a rotating part of the tool
may result in personal injury.
Do not overreach. Keep a proper footing and
balance at all times. Proper footing and
balance enables better control of the tool in
unexpected situations.
Dress properly. Do not wear loose clothing or
jewelry. Keep your hair, clothing and gloves
away from moving parts. Loose clothes,
jewelry or long hair can be caught in moving
parts.
Tool use and care
Do not force tool. Use the correct tool for
your application. The correct tool will do the
job better and safer at the rate for which it is
designed.
Do not use tool if switch does not turn it on or
off. Any tool that cannot be controlled with
the switch is dangerous and must be
repaired.
Disconnect the plug from the power source
before making any adjustments, changing
accessories, or storing the tool. S uc h
preventive safety measures reduce the risk of
starting the tool accidentally.
Store idle tools out of reach of children and
do not allow persons unfamiliar with the
power tool or these instructions to operate
the power tool. Tools are dangerous in the
hands of untrained users.
Maintain tools with care. Properly maintained
tools are less likely to bind and are easier to
control.
Check for misalignment or binding of moving
parts, breakage of parts, and any other
condition that may affect the tools operation.
If damaged, have the tool serviced before
using. Many accidents are caused by poorly
maintained tools.
Use the power tool, accessories and blades
etc., 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. Us e of th e pow er to ol fo r
operations different from those intended
could result in a hazardous situation.
Service
Have your tool serviced by a qualified repair
person using only identical replacement
parts. This will ensure that the safety of the
power tool is maintained.
-WARNING- To reduce the risk of injury, user
must read instruction manual.

5
Symbols used in this manual
V……..volts
A……..amperes
Hz……hertz
W……..watt
~………alternating current
n0………no load speed
/min……..revolutions or reciprocation per
minute
………….class II tool
SPECIFIC SAFETY RULES
1. Keep hands away from rotating sanding
head area at all times!
2. Prolonged breathing of airborne dust
from drywall sanding may effect
respiratory function:
Always use a vacuum cleaner with a
bag approved for drywall dust installed.
Always wear a respirator approved for
dust and mist.
3. Sanding LEAD-BASED paint is extremely
toxic and should not be attempted. Only
allow professionals with special training
and equipment perform this task.
4. Maintain proper footing and balance at
all times. Do not overreach. Use proper
scaffolding
5. Always wear appropriate safety
equipment when operating.
6. Important: After completing sanding,
switch off the switch and wait for the
c o a s t i n g s a n d i n g h e a d t o s t o p
completely before putting the tool
down.
7. Never operate the tool in an area with
flammable solids, liquids, or gases.
Sparks from the commutator/carbon
brushes could cause a fire or explosion.
8. There are certain applications for which
this tool was designed. T h e
manufacturer strongly recommends that
this tool NOT be modified and/or used
for any application other than for which
i t w a s d e s i g n e d . I f y o u h a v e a n y
questions relative to its application DO
NOT use the tool until you have written
the manufacturer and have been
advised.
9. Use the machine with both hands at all
times. Loss of control can cause
personal injury.
10. Keep power supply cord clear from the
working range of the machine. Always
lead the cable away behind you.
11. Immediately switch off the machine if
unusual vibrations or if other
malfunctions occur. Check the machine
in order to find out the cause.
12. The dust that arises when working with
this tool can be harmful to health. Use a
dust absorption system and wear a
sui ta bl e dust prote ct io n ma sk a nd
remove deposited dust with a vacuum
cleaner.
FUNCTIONAL DESCRIPTION
This Electric Drywall Sander is specially
designed for the most efficient sanding of
drywall or plaster walls and ceilings for both
new construction and renovation work. It is

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designed to work in conjunction with a
vacuum cleaner for minimum dust and best
sanding results. The pivoting sanding head
allows excellent results with minimum time
and effort.
Electrical connection
The network voltage must conform to the
voltage indicated on the tool name plate.
Under no circumstances should the tool be
used when the power supply cable is
damaged. A damaged cable must be
replaced immediately by an authorized
Customer Service Center. Do not try to repair
the damaged cable yourself. The use of
damaged power cables can lead to an
electric shock.
Extension cable
If an extension cable is required, it must have
a sufficient cross-section so as to prevent an
excessive drop in voltage or overheating. An
excessive drop in voltage reduces the output
and can lead to failure of the motor. The
following table shows
you the correct cable diameter as a function
of the cable length for this machine. Use only
U.L. and CSA listed extension cables. Never
use two extension cables together. Instead,
use one long one.
● UNPACKING
Carefully remove the tool and all loose items
from the shipping container.
Retain all packing materials until after you
have inspected and satisfactorily operated
the machine.
● CARTON CONTENTS
1. Drywall Sanding Machine
2. Vacuum cleaner hose
3. Instruction manual
DO NOT OPERATE THIS TOOL UNTIL YOU READ
AND UNDERSTAND THE ENTIRE INSTRUCTION
MANUAL
● To install a sandpaper disc:
1. Unplug the machine.
2. Peel away the worn out sandpaper disc,
leaving the sponge backing pad in
place.
3. Carefully center the new sandpaper
disc and press into place. It will be held
securely by the hook and loop backing.
● To replace the Hook and Loop Sponge Pad:
The sponge pad must be perfectly flat to get
good sanding results. If it is deformed or
damaged it will cause very uneven sanding.
Always replace it when damaged. It is hook
and loop on both sides, so to Replace it, peel
it away from the hook and loop on the
Total Extension Cord Size (AWG)
Cord Length (feet)
25 16
50 12
100 10
150 8
200 6

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Sanding Plate Base and, taking great care to
keep it perfectly centered, affix a new one.
● The Brush Bristles on the edge of the
Sanding Plate Cover:
The brush bristles on the edge of the Sanding
Plate Cover serve two purposes, they keep
the sanding disc properly aligned with the
work surface without gouging and they also
help the efficiency of the dust collection by
the vacuum cleaner. These brush bristles will
wear with continued use.
The Sanding Plate Cover should be replaced
when the bristles are too worn to ensure
effective dust collection and stabilization of
the sanding head.
To replace the cover, follow these steps:
Hold the sanding plate in one hand and with
the other, using the L-hex wrench (supplied),
first break free the center bolt clockwise (1/8
turn only!).
Then only use the L-hex wrench to hold the
center bolt from turning and spin off the
sanding plate counterclockwise.
Then, press the cover down against the
spring and, using snap-ring pliers, remove the
circlip which holds the sanding plate cover
to the bracket.
Finally, carefully work the vacuum hose free
then lift sanding plate cover away.
Replacement is the opposite of removal.
Don’t forget the spring. Entrust all repairs to
an authorized service center.
● To install the vacuum cleaner hose:
1. Unplug the machine.
2. Plug the vacuum cleaner hose bayonet
mount into the swivel mount in the back

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of the machine. Once the tangs of the
bayonet mount are fully inserted in the
slots, hold the swivel mount from turning
and tu rn th e hose ba yon et mou nt
clockwise to lock.
3. Removal is the opposite of assembly.
● The vacuum cleaner:
Ensure that you have a bag installed in your
vacuum cleaner which is approved and
rated for drywall dust.
WARNING: Failure to use an approved dust
bag in your vacuum will increase the level of
airborne dust in the work area. Prolonged
exposure to such dust may cause respiratory
harm.
● STARTING AND STOPPING TOOL
Make sure that the power circuit voltage is
the same as that shown on the specification
plate of the machine and that switch is
“OFF” before connecting the tool to the
power circuit.
● Switching the machine on and off
To switch on:
While holding with the left hand on the
column and the right hand on the main
handle, Press the rocker switch to the right
with the thumb of the right hand. Anticipate
and be ready for the start up torque when
the machine first starts.
To switch off:
Press the rocker switch to the left. After the
machine has been switched off, the sanding
disc will still rotate for a time. Take care that
parts of your body do not come into contact
with the disc and do not set the machine
down while it is still rotating!
● Adjusting the rotation speed:
The speed of the machine is variable to suit
different tasks. It can be adjusted from 650/
min up to 1600/min by using the thumb
wheel. Using the right thumb, turn in the
downward (counterclockwise) direction to
increase the speed and in the upward
(clockwise) direction to decrease the speed.
On/Off Switch

9
Generally, you should use the higher speed
for fast stock removal and the lower speed
for more precise control.
HOW TO USE THE TOOL
Effective control of this powerful saw requires
two-handed operation for maximum safety
and control.
The proper hold is to keep one hand on the
main handle and the other hand on the
sponge grip on the column. It is vitally
important to keep stable footing at all times,
especially when standing on scaffolding or
stilts.
■ MOUNTING THE OPTIONAL BAIL HANDLE:
1. Loosen the 2 thumb screws (05) and
remove the clamp cap (04).
2. Place the handle in the desired position
on the column.
3. Clamp the handle in place by replacing
the clamp cap and tightening the 2
thumb screws.
● SANDING OPERATIONS
1. Once the machine and vacuum
cleaner are set up and all safety
measures and equipment are in place,
begin by turning on the vacuum cleaner
and then the machine. (If you are using
a vacuum cleaner with integrated
switching, then simply turn the machine
on.)
2. Begin sanding and carefully contact the
work surface as lightly as possible-just
enough to keep the sanding head flat
against the surface.
3. The joints in the sanding head allow the
sanding disc to follow the contours of
the work surface.
4. The best technique is to use overlapping
sweeps and keep the head in constant
motion. Never stop too long in any one
place or there will be swirl marks. With
experience it will be very easy to create
excellent results.
NOTE: Ensure that the sandpaper you are
using is suited to the task. Overly coarse grit
Speed Adjustment
02
03
04
05
02
01

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paper may remove material too quickly to
control. While overly fine grit paper may clog
too often and not shape down the surface.
CAUTION: Take care to avoid pointed
projections and nails, etc. This will wipe out
the sandpaper and probably damage the
sponge pad as well.
MAINTENANCE
● KEEP TOOL CLEAN
Periodically blow out all air passages with dry
compressed air. All plastic parts should be
cleaned with a soft damp cloth. NEVER use
solvents to clean plastic parts. They could
possibly dissolve or otherwise damage the
material.
Wear safety glasses while using compressed
air.
Clean the vacuum swivel connector as too
much dust will keep it from turning freely.
● THE CARBON BRUSHES
The carbon brushes are a normal wearing
part and must be replaced when they reach
their wear limit. When the brushes are worn to
a length of 1/4", they should be replaced.
NOTE: Checking and replacing the carbon
brushes should be entrusted to a qualified
service center.
TO CHANGE THE BRUSHES
1. Unplug the machine.
2. Remove the brush cap with a slothead
screwdriver
3. Remove the brush.
4. Install new brushes in reverse order and
replace covers
If the replacement of the power supply
cord is necessary, this has to be done
by the manufacturer or their agent in
order to avoid a safety hazard.
Brush Cap

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WIRING
BLACK
RED
WHITE
CARBON BRUSH
OVERLOAD
SPEED CONTROL UNIT
MOTOR
CARBON BRUSH
BLACKBLACK RED
SWITCH
TERMINAL
AC
BLACK BLACK
AC

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EXPLODED VIEW
20
21
22
07
06
11
10
09
08
16
13
14
15
23
24
23
25
26
27
28
26
32
33
36
37
31
30
31
45
44
66
67
65
59
60
58
57
12
01 02
03 04
38
39
40
41
42
43
46
47
48
49
51
53
52
57
64
68
69 70
57
57
38A
39A
40A
29
71
34
35
72
61
62
63
73
74
05
75
18
19
19
18
75
A3
A2
A1
OPTIONAL
No. Parts Name Q'TY
1 POWER SUPPLY CABLE 1
2 CORD ARMOR 1
3 VACUUM EXTENSION HOSE 4M 1
4 QUICK RELEASE HOSE CONNECTOR 1
5 SCREW M4 x 16 6
6 RIGHT HANDLE COVER 1
7 LEFT HANDLE COVER 1
8 CABLE CLIP 1
9 SCREW M4 x 14 2
10 SCREW M4 x 25 2
11 SPEED CONTROL 1
12 WIRE CONNECTOR 1
13 WIRE LEADER 1
14 WIRE LEADER 1
15 WIRE LEADER 1
16 MOTOR SWITCH 1
17 N/A -
18 CARBON BRUSH 2
19 CARBON BRUSH HOLDER 2
20 MOTOR HOUSING 1
21 STATOR 1
22 STATOR SCREW M4 x 50 2
23 BALL BEARING 608 2RS 2
24 ARMATURE 1
25 GEAR PLATE 1
26 BUSHING 6 x 10 x 8 3
27 INTERMEDIATE GEAR 1
28 INTERMEDIATE GEAR PINION 1
29 INTERNAL CIRCLIP S-8 1
30 OUTPUT GEAR 1
31 SCREW M5 x 10 4
32 GEAR CASE 1
33 SCREW W/ WASHER M4 x 30 3
34 INTERNAL CIRCLIP S-10 1
35 BALL BEARING 6200 2RS 1
36 WOODRUFF KEY 3 x 8 1
37 SPINDLE 1
38 FIRST DRIVE SHAFT 254mm 1
38A FIRST DRIVE SHAFT 704mm 1
39 EXTENSION COLUMN 577.3mm 1
39A EXTENSION COLUMN 1027.3mm 1

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PARTS LIST
No. Parts Name Q'TY
1 POWER SUPPLY CABLE 1
2 CORD ARMOR 1
3 VACUUM EXTENSION HOSE 4M 1
4 QUICK RELEASE HOSE CONNECTOR 1
5 SCREW M4 x 16 6
6 RIGHT HANDLE COVER 1
7 LEFT HANDLE COVER 1
8 CABLE CLIP 1
9 SCREW M4 x 14 2
10 SCREW M4 x 25 2
11 SPEED CONTROL 1
12 WIRE CONNECTOR 1
13 WIRE LEADER 1
14 WIRE LEADER 1
15 WIRE LEADER 1
16 MOTOR SWITCH 1
17 N/A -
18 CARBON BRUSH 2
19 CARBON BRUSH HOLDER 2
20 MOTOR HOUSING 1
21 STATOR 1
22 STATOR SCREW M4 x 50 2
23 BALL BEARING 608 2RS 2
24 ARMATURE 1
25 GEAR PLATE 1
26 BUSHING 6 x 10 x 8 3
27 INTERMEDIATE GEAR 1
28 INTERMEDIATE GEAR PINION 1
29 INTERNAL CIRCLIP S-8 1
30 OUTPUT GEAR 1
31 SCREW M5 x 10 4
32 GEAR CASE 1
33 SCREW W/ WASHER M4 x 30 3
34 INTERNAL CIRCLIP S-10 1
35 BALL BEARING 6200 2RS 1
36 WOODRUFF KEY 3 x 8 1
37 SPINDLE 1
38 FIRST DRIVE SHAFT 254mm 1
38A FIRST DRIVE SHAFT 704mm 1
39 EXTENSION COLUMN 577.3mm 1
39A EXTENSION COLUMN 1027.3mm 1
No. Parts Name Q'TY
40 FOAM HANDLE GRIP 1
40A FOAM HANDLE GRIP 1
41 SHAFT CONNECTOR 1
42 BALL BEARING 6001 2RS 1
43 INTERNAL CIRCLIP S-12 1
44 SCREW M4 x 20 4
45 RIGHT DRIVE COVER 1
46 LEFT DRIVE COVER 1
47 SECONDARY DRIVE SHAFT 1
48 DRIVE SHAFT COVER 1
49 HOLDING PIN 6 x 39 1
50 N/A -
51 RIGHT SANDER BRACKET 1
52 LEFT SANDER BRACKET 1
53 SCREW M4 x 8 2
54 N/A -
55 N/A -
56 N/A -
57 SCREW M5 4
58 PIVOT BASE 1
59 PIVOT CONNECTING BRACKET 1
60 CONNECTING SPINDLE 1
61 BALL BEARING 6002 2RS NSK 1
62 EXTERNAL CIRCLIP R-32 1
63 SPRING ø2 x ø49 x 40L x 4T 1
64 VACUUM HOSE 1
65 SPRING ø1 x ø32 x 363L x 30T 1
66 PLASTIC CLIP 1
67 SANDING PLATE COVER 1
68 INTERNAL CIRCLIP S-40 1
69 SANDING PLATE BASE 1
70 VELCRO SPONGE PAD 1
71 EXTERNAL CIRCLIP R-30 1
72 DUST GUIDE 1
73 SHAFT RACE M14 x ø20 x 6.5 1
74 RADIAL SHAFT SEAL ø20 x ø32 x 5 1
75 BRUSH CAP 2
Optional
A1 RIGHT HOSE SUPPORT 1
A2 LEFT HOSE SUPPORT 1
A3 SCREW M4 x 14 4

London Dublin
Aristospray UK, Granville House Aristospray, Unit 45
Wallingford Road, Uxbridge Baldoyle Industrial Estate
Middlesex UB8 2RW Baldoyle, Dublin 13
T [phone] T [phone]
F [phone] F [phone]
E [email protected] E [email protected]
W www.aristosprayuk.com