DeWalt DCH323 Manual page 14

English
3. To reinstall, insert the utility hook into the the slot below the
main handle.
Bit and Bit Holder

WARNING: Burn Hazard. ALWAYS wear gloves when
changing bits. Accessible metal parts on the tool and bits
may get extremely hot during operation. Small bits of
broken material may damage bare hands.
The hammerdrill can be fitted with different bits depending on
the desired application. Use sharp drill bits only.
Bit Reccomendations
• For wood, use twist bits, spade bits, power auger bits or
hole saws.
• For metal, use high-speed steel twist drill bits or hole saws.
Use a cutting lubricant when drilling metals. The exceptions
are cast iron and brass which should be drilled dry.
• For masonry, such as brick, cement, cinder block, etc., use
carbide-tipped bits rated for percussion drilling.
SDS-Plus Bit Holder (Fig. F)
nOTE: Special adapters are needed to use the SDS-plus tool
holder with straight shank bits and hexagonal screwdriver bits.
Refer to Optional Accessories.
To insert a drill bit or other accessory:
1. Insert the shank of the bit about 19 mm into SDS-Plus
tool holder.
2. Push and rotate bit until it locks in place. The bit will be
securely held.
3. To release bit, pull the sleeve
Keyless Chuck (Fig. F, G)
DCh334
On some models, a keyless chuck can be installed in place of the
SDS-Plus bit holder.

WARNING: Never use standard chucks in the rotary
hammering mode.
Replacing the sDs-Plus Bit holder with the Keyless Chuck
1. Select hammering only mode (see Operation Modes), this
locks the spindle to prevent it from rotating when unlocking
the removable tool holder.
2. Turn the locking collar 15
pull the installed bit holder off.
3. Push the keyless chuck 16
the locking collar into the locking position.
4. To replace the keyless chuck with the SDS-Plus bit holder,
first remove the keyless chuck the same way as the SDS-
Plus bit holder was removed. Then replace the SDS-Plus
bit holder the same way as the keyless chuck was replaced.
To insert a drill bit or other accessory in keyless chuck:
1. Grasp the sleeve 16 of the chuck with one hand and use
the other hand grasping the base of the chuck.
2. Rotate the sleeve counterclockwise (as viewed from the
front) far enough to accept the desired accessory.
3. Insert the accessory about 19 mm into the chuck and
tighten securely by rotating the chuck sleeve clockwise
12
10 back and remove the bit.
into the unlocked position and
onto the spindle 17 and turn
with one hand while holding the tool with the other hand.
Continue to rotate the chuck sleeve until several ratchet
clicks are heard to ensure full gripping power.
Be sure to tighten chuck with one hand on the chuck sleeve and
one hand holding the tool for maximum tightness.
To release the accessory, repeat Steps 1 and 2 above.
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 battery pack
before making any adjustments or removing/
installing attachments/accessories or when making
repair. An accidental start-up can cause injury.
Proper Hand Position (Fig. E)

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 one hand on the main handle
with the other hand on the side handle
Operation Modes (Fig. A)

WARNING: Do not select the operating mode when the
tool is running.
Your tool is equipped with a mode selector dial
mode appropriate to desired operation.
symbol Mode
Rotary Drilling
Rotary
hammering
hammering
only
To select an operating mode:
1. Depress the mode selector release button
2. Rotate the mode selector dial so that the arrow points to the
symbol corresponding with the desired mode.
nOTE: The mode selector 3 must be in rotary drilling, rotary
hammering or hammering only mode at all times. There are no
operable positions in between. It may be necessary to briefly
run the motor after having changed from 'hammering only' to
'rotary' modes in order to align the gears.
8 ,
5 .
to select the
3
Application
Screwdriving
Drilling into steel, wood
and plastics
Drilling into concrete and
masonry
Light chipping
4 .
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