Selecting Forward Or Reverse Rotation; Operating Instructions; Drilling Concrete; Drilling Wood - GMC SDSHD550 Manual Del Usuario

• Do not attempt to move the hammer selection switch
whilst the drill is running

Selecting forward or reverse rotation

• The direction of the drill can be changed using the
Reverse Selection Lever (5)
• To run the drill in a clockwise direction, position the
reverse selection lever on the left, adjacent to the
symbol
• To run the drill in anticlockwise (reverse) direction,
position the reverse selection lever on the right, adjacent
to the symbol
• Do not attempt to move the reverse selection lever whilst
the drill is running
• Do not attempt to run the drill with the reverse selection
lever in mid position

Operating Instructions

IMPORTANT: Wear all necessary safety equipment prior to
operating this tool
On/Off Trigger Switch
• Always hold the drill firmly using both hands
• To start the drill, squeeze the Trigger Switch (6)
• To stop the drill, release the trigger switch
Lock-On Button
• The drill is equipped with a Lock-On Button (7). This
allows the trigger switch to be locked into the 'On'
position for tasks that require extended continuous
running
• To use the lock-on function, depress the lock-on button
whilst squeezing the trigger, the trigger can then be
released and the drill will continue to run
• To stop the drill, squeeze then release the Trigger Switch
(6)
Speed Control
• The speed of the drill can be varied by rotating the
Speed Control Dial (8)

Drilling Concrete

• Using hammer drill mode, apply pressure to the rear of
the drill, in line with the drill bit
• For efficient drilling, it is advisable to use TCT (tungsten
carbide tipped) drill bits. Ensure that drill bit size is within
the maximum capacity of the drill (see specifications)
• Do not apply too much pressure if debris blocks the drill
hole. Run the drill slowly, and remove the bit from the
hole. Repeat until hole is cleared

Drilling Wood

• Use rotary drill mode only
• Ensure that drill bits are suitable for wood, and are within
the maximum capacity of this drill (see specifications)

Drilling Metal

• To ensure accuracy, mark the intended hole position
using a hammer and centre punch
• Use rotary drill mode only
• Ensure that drill bits are suitable for the grade of metal
being drilled, and are within the maximum capacity of the
drill (see specifications)
• To ensure efficient cutting, and prolong drill bit life, use a
suitable lubricant or cutting fluid
CAUTION
• Applying excess pressure does not result in faster or
more efficient drilling. If the pressure applied to the drill
has a noticeable effect on the speed of the drill then
reduce the pressure. Overloading the drill will reduce its
service life
• As the drill bit penetrates the material, it may 'catch' or
'snag'. This can cause the machine to suddenly 'kick'.
To prevent any possibility of injury always hold the drill
securely, use the side handle, and use sharp drill bits
• Always ensure that material is secure. If appropriate use
a vice or clamp to hold the work, and keep both hands
on the drill
9
GB