Unpacking
Due to modern mass production techniques, it is unlikely that your GMC Power Tool is faulty or that a part is missing. If you find anything wrong, do not operate the tool until the parts have been replaced or the fault has been rectified. Failure to do so could result in serious personal injury.
Inserting SDS bits
WARNING. Always ensure that the drill is switched off and plug is removed from the power point before making any adjustments.
1.Apply a coating of universal grease to the end of the bit that is to be inserted into the SDS chuck.
2.Pull back the locking sleeve (2), insert the SDS Plus bit into the chuck opening and release the locking sleeve (2).
Note. The SDS Plus bit needs to be inserted in a specific way to ensure it locks into the chuck. To check if it is properly inserted, attempt to pull the bit out of the chuck. If it can be removed without pulling back locking sleeve (2), rotate the bit a little and
Auxiliary handle
1.Loosen wing nut (3) anti- clockwise to loosen the collar and slip it over the chuck onto the drill.
2.Adjust the position of the handle to suit the application and add the depth gauge (9) if required.
3.Place the tip of the drill on the
workpiece and push in the depth gauge until the desired hole depth is indicated on the depth gauge scale. Tighten wing nut (3).
Using the dust protector cap
The dust cap (15) can be used to give added protection against dust and debris entering the SDS chuck.
1.Place the cap over the shank of the bit and slide it forward until it rests against the shoulder of the bit.
2.Insert the bit into the SDS chuck as normal.
Selecting the required function
It is possible to use the Rotary Hammer Drill in three different modes:
1.Rotation only – for drilling into metal and wood products.
2.Rotary hammer – for drilling into brick, concrete and masonry products.
3.Hammer only – for chiseling brick, concrete and masonry products.
To select the required mode of operation set the selector knob (4) and the hammer function switch (7) to the positions indicated.
Note. To operate the selector knob (4), first push the button on the knob then turn it either to the 
or to the 
position as required.
The hammer function switch (7) can be turned to the
left 
or to the right 
as required.
9
