ENGLISH
6
CROSS-CUT MITRE SAW
DWS778
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Technical Data
      DWS778
    QS/GB    LX
Voltage V 230  115
  (U.K. & Ireland only)  V  230    115
Type     1    1
Power input  W  1850    1650
Blade diameter  mm  250    250
Blade bore  mm  30    30
Max. blade speed  min
-1
 4300  4100
Cutting depth  mm  85    85
Max. blade thickness  mm  1.75    1.75
Mitre (max. positions)   left and right  50°    50°
Bevel (max. positions)   left   48°    48°
Compound mitre   bevel   45°    45°
  mitre  45°    45°
Capacities
  cross-cut 90°   mm     85 x 305
  mitre 45°   mm     85 x 215
  mitre 48°   mm    85 x 204
  bevel 45°   mm    58 x 305
  bevel 48°   mm    54 x 305
Overall dimensions   mm    465 x 615 x 390
Weight kg  17.2
L
PA
 (sound pressure)  dB(A)  94.2    94.2
K
PA
   (sound pressure uncertainty)  dB(A)  3.0    3.0
L
WA
 (sound power)  dB(A)  107.2    107.2
K
WA  
(sound power uncertainty)  dB(A)  3.0    3.0
L
P,PEAK
 dB(A) 115.6  115.6
K
P,PEAK
 dB(A) 3.0  3.0
Vibration total values (triax vector sum) determined according to EN61029:
Vibration emission value a
h 
 
a
h
 =  m/s²  2.4    2.4
 
Uncertainty K =  m/s²  1.5    1.5
The vibration emission level given in this information sheet has been 
measured in accordance with a standardised test given in EN 61029 
and may be used to compare one tool with another. It may be used for 
a preliminary assessment of exposure.
    WARNING: The declared vibration emission level 
represents the main applications of the tool. However if 
the tool is used for different applications, with different 
accessories or poorly maintained, the vibration emission 
may differ. This may significantly increase the exposure level 
over the total working period.
   An estimation of the level of exposure to vibration should 
also take into account the times when the tool is switched 
off or when it is running but not actually doing the job. This 
may significantly reduce the exposure level over the total 
working period.
   Identify additional safety measures to protect the operator 
from the effects of vibration such as: maintain the tool and 
the accessories, keep the hands warm, organisation of 
work patterns.
Fuses
  Europe  230 V tools  10 Amperes, mains
  U.K. & Ireland  230 V tools  13 Amperes, in plugs
  U.K. & Ireland  115 V tools  16 Amperes, mains
NOTE: This device is intended for the connection to a power supply 
system with maximum permissible system impedance Zmax of 
0.25 Ohm at the interface point (power service box) of user’s supply.
The user has to ensure that this device is connected only to a power 
system which fulfils the requirement above. If necessary, the user can 
ask the public power supply company for the system impedance at the 
interface point. 
Defi nitions: Safety Guidelines 
The definitions below describe the level of severity for each signal word. 
Please read the manual and pay attention to these symbols.
    DANGER: Indicates an imminently hazardous situation 
which, if not avoided, will result in death or serious injury.
     WARNING: Indicates a potentially hazardous situation 
which, if not avoided, could result in death or serious 
injury.
 
   CAUTION: Indicates a potentially hazardous situation 
which, if not avoided, may result in minor or moderate 
injury.
   NOTICE: Indicates a practice not related to personal 
injury which, if not avoided, may result in property 
damage. 
 
 Denotes risk of electric shock.
 
 Denotes risk of fire.
   Denotes sharp edges.
EC-Declaration of Conformity
MACHINERY DIRECTIVE
DWS778
D
EWALT declares that these products described under Technical Data 
are in compliance with: 2006/42/EC, EN 61029-1, EN 61029-2-9.
These products also comply with Directive 2004/108/EC and
2011/65/EU. For more information, please contact DEWALT at the 
following address or refer to the back of the manual.
The undersigned is responsible for compilation of the technical file and 
makes this declaration on behalf of DEWALT.
Horst Grossmann
Vice President Engineering and Product Development
DEWALT, Richard-Klinger-Straße 11,
D-65510, Idstein, Germany
01.11.2012
Safety Instructions
     WARNING! When using electric tools, basic safety 
precautions should always be followed to reduce the risk 
of fire, electric shock and personal injury including the 
following.