Operation; Gear Selection; Depth Stop; Drilling Wood - GMC GMCSDS18 Manual

• Batteries can become faulty over time, individual cells in the battery can fail and the battery could short.
The charger will not charge faulty batteries. Use another battery, if possible, to check correct functionality
of the charger and purchase a replacement battery if a faulty battery is indicated
• DO NOT store lithium-ion battery packs in a discharged state long term. This can damage the lithium-ion
cells. For long-term storage, store batteries in a high charge state disconnected from the power tool
• The capacity of batteries will reduce over time. After 100 charge cycles, the battery's operation time and
the maximum torque performance of the driver will slightly reduce. This decline will continue until the
battery has minimal capacity after 500 charge cycles. This is normal and not a fault with the battery pack

Operation

Auxiliary handle
GB
• The Auxiliary Handle (1) should always be used
• The Auxiliary Handle angle can be adjusted to best suit the work to be performed
• To adjust the Auxiliary Handle:
1. Rotate the grip anti-clockwise. This will loosen the handle assembly
2. Move the Auxiliary handle to the required position
Secure in position by rotating the grip clockwise

Depth stop

1. Rotate the grip anti-clockwise. This will loosen the handle assembly
2. Move the Depth Stop (16) to the required position
Secure in position by rotating the grip clockwise
Operating the chuck
• This drill has a chuck designed for SDS Plus drill bits
• The SDS Plus system allows bits to be inserted with a simple push-fit action
• Always grease the tail end of SDS bits. Bits should be freshly greased and free from dirt and dust
before use
• To insert a drill bit:
1. Pull back the Chuck Collar (14) and hold
2. Insert SDS Plus drill bit fully into the Chuck (15). Use a twisting motion to line up the grooves in the
accessory
3. Release the Chuck Collar
4. The bit should now be locked into the machine. Check by pulling the bit; if the bit can be removed, repeat
the above procedure until secure
• To remove a bit from the Chuck, pull the Chuck Collar back, and pull firmly on the drill bit
WARNING: Never fit any attachment with a maximum speed lower than the no load speed of the machine
Hammer selection
• The drill can be used in either hammer drill mode (for masonry work), or conventional rotary drill mode (for
wood, metal, plastics etc) with the purchase of a standard chuck to SDS Plus adaptor
• To select hammer drilling mode, depress the Mode Selector Release (3) on the Mode Selector (2) and align
the Mode Selector with the symbol
• To select rotary drilling mode, depress the button on the Mode Selector Release on the Mode Selector and
align the Mode Selector with the
• Do not attempt to move the Mode Selector whilst the drill is running

Operating instructions

IMPORTANT: Put on all safety equipment required before you operate this drill

Trigger switch

• Always hold the drill firmly using both hands
• To start the drill, squeeze the Trigger (8)
• To stop the drill, release the Trigger
symbol
Selecting forward or reverse rotation
• The direction of the drill can be changed using the Forward/Reverse Switch (7)
• To run the drill in a clockwise direction, position the Forward/Reverse Switch on the left, adjacent to the
symbol
• To run the drill in an anti-clockwise direction, position the Forward/Reverse Switch on the right, adjacent to
the symbol
• Do not attempt to move the Forward/Reverse Switch whilst the drill is running
• Do not attempt to run the drill with the Forward/Reverse Switch in mid position
Speed Control
• The speed of the drill is controlled by the pressure applied to the Trigger (8). The further the Trigger is
depressed the higher the speed

Gear selection

• Select gear 1 on the Gear Switch (4) for the low speed, high torque gear. Suitable for low speed drilling and
driving screws and fasteners
• Select gear 2 on the Gear Switch for the high speed, low torque gear. Suitable only for high speed drilling
NOTE: ALWAYS read the documentation provided with drill bits and accessories for the recommended or
maximum speed setting and use the most appropriate gear. See 'Specification' for the maximum no load
speed of each gear.
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 'Specification')
• 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
IMPORTANT: The following instructions relate to functions of the drill only available with the additional
purchase of a standard chuck adaptor or bit holder adapter.
Using a chuck adaptor
1. Insert standard chuck adaptor into Chuck (15)
2. Use rotary drill mode only
3. Fit drill bit into chuck and tighten securely
4. Make sure the drill bit runs centrally before use. If not, re-fit bit

Drilling wood

• Ensure that drill bits are suitable for wood, and are within the maximum capacity of this drill (see
'Specification')

Drilling metal

• To ensure accuracy, mark the intended hole position using a hammer and centre punch
• Ensure that drill bits are suitable for the grade of metal being drilled, and are within the maximum capacity
of the drill (see 'Specification')
• 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 being drilled, 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 Auxiliary 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
8