DeWALT D25501 User Manual

result.
 A.  Trigger switch 

F.  Mode selector

 B.  Lock-on slider 

G.  Electronic Speed and impact control dial

 C.  Side handle 

H.  Clamp knob

 D.  Main handle 

I.  Rear side handle position

  E. Active vibration control 

 

INTENDED USE
These heavy-duty rotary hammers have been designed for professional hammerdrilling, and 
chipping at various work sites (i.e., construction sites). DO NOT use under wet conditions or in 
presence of flammable liquids or gases.
These heavy-duty rotary hammers are professional power tools. DO NOT let children come into 
contact with the tool. Supervision is required when inexperienced operators use this tool.

handle properly installed and securely tightened. Failure to do so may result in the side handle 
slipping during tool operation and subsequent loss of control. Hold tool with both hands to 
maximize control.
The side handle clamps to the front barrel (collar) and may be rotated 360° to permit right 
or left-hand use. For operating convenience, the side handle can be installed in front or rear 
positions.

TO MOUNT IN FRONT POSITION (FIG. 2)
  1. Unscrew the side handle (C) and disassemble the side handle clamp (J).
 2.  

Snap the steel ring (K) over the collar (L) behind the tool holder (M). Squeeze both ends of 
the steel ring together. Mount the bushing (N) and insert the pin (O).

  3. Slide the side handle clamp (J) over the bushing and screw on the clamp knob (H)–do not 

tighten.

  4. Screw the side handle (C) into the clamp knob (H) and tighten.
 5. Rotate the side handle mounting assembly to the desired position. For hammerdrilling 

horizontally with a heavy drill bit, place the side handle assembly at an angle of approximately 
20° to the tool for optimum control.

  6. Lock the side handle mounting assembly in place by tightening the clamp knob (H).

TO MOUNT IN REAR POSITION (FIG. 3)
  1. Unscrew the side handle (C) and remove it from the side handle mounting assembly. Leave 

the side handle mounting assembly in the front position.

  2. Screw the side handle directly into one of the rear side handle positions (I) on either side of 

the tool.

D25602, D25651, D25831, D25851
For best vibration control, hold the tool with one hand on the main handle (D) and the other hand 
on the side handle (C). Apply just enough pressure so the damping device on the main handle 
is approximately mid stroke. The hammer only needs enough pressure to engage the active 
vibration control. Applying too much pressure will not make the tool drill or chip faster and active 
vibration control will not engage.

from power source before making any adjustments or removing/installing attachments or 
accessories.
  1.  Insert the bit shank into the tool holder (M) as far as it will go. The groove on the chisel shank 

(Q) must be aligned with the symbol (R) on the toolholder. If inserted correctly, the locking 
sleeve (P) moves back to the end position and shows a closed lock symbol.

  2. Pull on the bit to be sure that it is properly locked. 
  3. If the chisel groove is not aligned with the symbol, or is not inserted to the complete depth 

the lock symbol remains open.

To remove the bit, pull back the locking sleeve and pull the bit out.

from power source before making any adjustments or removing/installing attachments or 
accessories.
  1. Pull back the locking sleeve (P) and insert the bit shank. The bit shank must be clean.
  2. Turn the bit slightly until the sleeve snaps back into position.
  3. Ensure the bit is properly engaged. 
    NOTE: The bit needs to move several centimeters in and out of the tool holder (M) when 

properly engaged.

  4. To remove the bit, pull back the locking sleeve and pull the bit out.

D25602, D25651
NOTICE: Always turn the tool off before changing torque control settings or damage to tool may 
result.
The Complete Torque Control (CTC) feature of this tool is designed to provide additional control 
with a two-stage clutch mechanism. 
Clutch Setting 1 (S) is designed for most hammerdrilling applications and is designed to easily 
clutch out when the drill bit encounters re-bar or other foreign substances.
Clutch Setting 2 (T) is designed for higher torque applications such as core-bits and deep hole 
hammerdrilling and is designed to clutch out at a higher torque threshold.
Move the torque control lever (U) to setting 1 or 2 as needed for application.
NOTE: Allow the motor housing to rotate a little while changing torque.
Each time the tool is plugged in, it will automatically default to clutch setting 1, the most 
sensitive setting.

D25602, D25651, D25831, D25851
The electronic speed and impact control allows the use of smaller drill bits without the risk of 
bit breakage, hammerdrilling into light and brittle materials without shattering and optimal tool 
control for precise chipping. 
To set the control dial, turn the dial (G) to the desired level. The higher the number, the greater 
the speed and impact energy. Dial settings make the tool extremely adaptable for many 
different appli cations. The required setting depends on the bit size and hardness of material 
being drilled.

and damage to tool may result.
The D25501, D25553, D25602, D25651 uses two operating modes. To select the required 
operating mode, rotate the mode selector (F) until the arrow points to the hammerdrilling or the 
chipping icon. The D25831 and D25851 use only the chipping mode.

The tool simultaneously rotates and impacts the work. This mode is appropriate for all concrete 
and masonry operations. 

The spindle lock is engaged during chipping mode so the tool impacts the work without 
rotating. This mode is appropriate for light chipping, chiseling and demolition applications. 
NOTE: In chipping mode, the hammerdrill can also be used as a lever to free a jammed drill 
bit.

Turn the mode selector to one of the chisel bit adjustment icons to adjust the chisel to the 
desired position. There are 18 possible positions to set the angle of the chisel. After finding the 
desired position, slightly maneuver the chisel bit back and forth to ensure the chisel is properly 
engaged.

The yellow brush wear indicator LED (V) lights up when the carbon brushes are nearly worn out 
indicating that the tool needs servicing within the next 8 hours of use. 
The red indicator LED (W) lights up if the lock-on slider (B) is used in any mode except the 
chipping mode. 
The red indicator LED (W) flashes if there is a fault with the tool or if the brushes are completely 
worn (refer to Brushes under Maintenance).

of a sudden reaction. 
Proper hand position requires one hand on the side handle (C), with the other hand on the main 
handle (D). 
NOTE: Operating temperature of this tool is 19˚ to 104˚ F (-7 to +40˚ C). Using the tool outside 
of this temperature range will decrease the life of the tool. 

To turn the tool on, depress the trigger switch (A). To stop the tool, release the trigger switch. 

D25602, D25651
In chipping mode only, lock the trigger switch on, push the lock-on slider (B) upwards while 
depressing the trigger switch.
To deactivate the lock-on slider, depress the trigger switch once then release.
The lock-on slider may only be activated in chipping mode. The machine will stop running when 
trying to engage the lock-on slider in hammerdrilling mode. The motor will stop if the lock-on slider is 
activated when changing from chisel mode into hammerdrilling mode.

D25831, D25851
For continuous operation, move the toggle switch to the on position. To stop continuous 
operation, move the toggle switch to the off position.

HAMMERDRILLING MODE

MODE DE MARTEAU PERFORATEUR

MODO TALADRO PERCUTOR

CHIPPING MODE

MODE DE BURINAGE

MODO CINCEL

CHISEL BIT ADJUSTMENT MODE

MODE DE RÉGLAGE DU TRÉPAN ORDINAIRE
MODO DE AJUSTE DE LA BROCA DE CINCEL

CHISEL BIT ADJUSTMENT MODE

MODE DE RÉGLAGE DU TRÉPAN ORDINAIRE
MODO DE AJUSTE DE LA BROCA DE CINCEL

F

E

A

I

G

B

E

C

H

D

FIG. 1

K

J

O

H

C

N

FIG. 2

L

P

M

FIG. 3

C

I

W 

FIG. 5

G

V 

S

T

U

FIG. 4

M

P

R

Q

J