ENGLISH
7
OPERATION
Instructions for Use
   WARNING: Always observe the safety 
instructions and applicable regulations.
   WARNING: To reduce the risk 
of serious personal injury, turn 
tool off and disconnect tool from 
power source before making any 
adjustments or removing/installing 
attachments or accessories.
 
 WARNING: 
 •  Make sure all materials to be sanded 
are well secured.
 •  Apply only a gentle pressure to the 
workpiece. Excessive pressure does 
not improve the sanding effect, but 
only results in an increased load on 
the machine and causes the abrasive 
to tear.
 • Avoid overloading.
 
  WARNING: Do not sand magnesium!
  NOTICE: If you wrap the cord around 
the tool when you store it, leave a 
generous loop of cord such that the 
strain relief (g, fig. 1) does not bend. 
This helps prevent premature cord 
failure.
Proper Hand Position (fi g. 5)
   WARNING: To reduce the risk of 
serious personal injury, ALWAYS use 
proper hand position as shown. 
   WARNING: To reduce the risk of 
serious personal injury, ALWAYS hold 
securely in anticipation of a sudden 
reaction. 
Proper hand position requires either one hand on 
the sander body (j) or one hand on the main grip (p) 
as shown. 
Switching On and Off (fi g. 1)
DWE6421
To switch the tool on, set the on/off switch to 
position I.
To switch the tool off, set the on/off switch to 
position O. 
DWE6423
Set the sanding speed using the electronic speed 
control dial (b) 
To switch the tool on, set the on/off switch to 
position I.
To switch the tool off, set the on/off switch to 
position O.
Sanding
Start with the coarsest grit size.
As the tool produces small abrasion marks in all 
directions, it is not necessary to sand with the grain.
Check your work at short intervals.
Always switch off the tool when work is finished and 
before unplugging.
MAINTENANCE
Your DEWALT power tool has been designed to 
operate over a long period of time with a minimum 
of maintenance. Continuous satisfactory operation 
depends upon proper tool care and regular cleaning.
   WARNING: To reduce the risk of 
injury, turn unit off and disconnect 
machine from power source before 
installing and removing accessories, 
before adjusting or changing
set-ups or when making repairs. 
Be sure the trigger switch is in the OFF 
position. An accidental start-up can 
cause injury.
Replacing the Sanding Pad and the 
Speed Limiter Belt (fi g. 4)
Your sander is equipped with a replaceable belt (m) 
which is located between the pad (f) and the sander 
body (j). It is designed to control the pad speed 
while the unit is off the work surface. The belt and 
the sanding pad (f) are designed to be consumable 
parts and will occasionally need to be replaced. 
The sanding pad needs replacement when signs 
of wear become evident. Replacement of the belt 
is necessary when the pad speed increases very 
dramatically when the unit is lifted from the work 
surface. These parts are available at extra cost from 
your local dealer or authorised DEWALT service 
centre.
  1. Holding the platen firmly, remove the four 
screws (o) from the bottom of the pad.
  2. Remove the pad (f).