Operating Instructions; Drilling Concrete; Drilling Wood; Drilling Metal - GMC RHD850 Manual Del Usuario

Operating Instructions

IMPORTANT: Put on all safety equipment required before
you operate this drill
On/Off Trigger Switch
• Always hold the drill firmly using both hands
• To start the drill, squeeze the Trigger Switch (7)
• To stop the drill, release the trigger switch
GB
Lock On Button
• The drill is equipped with a Lock On Button (8). 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 (7)
Speed Control
• The speed of the drill can be varied by rotating the
Speed Control Dial (9)

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

Chiselling

• Using roto-stop or rotary chisel mode, apply pressure to
the rear of the drill, in line with the chisel bit
• Be aware that when chiselling there is a high risk of
chips and other waste being ejected from the work
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, always keep two hands
on the drill

Maintenance

WARNING: Always remove the plug from the mains power
supply before carrying out any maintenance/cleaning.
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