Hints for use

NOTE. When drilling into masonry the drilling rate is fast and burnout of the tip will occur if the drill bit is not constantly cleared.

Use only correctly sharpened drill bits, which are suitable for the material being drilled.

To drill hard materials, firm pressure is required on the power tool. However, excessive pressure does not improve performance and places unnecessary pressure on the tool and its bit.

When screw driving always use a pilot hole and set the speed dial to low. Press firmly on the screw head and pull the trigger gradually increasing the speed. It is always wiser to test the screw driving on a scrap piece of the same material you are using.

Larger diameter holes in hard wood, steel and concrete have to be drilled at slower speeds. However, the motor must not be struggling with the operation. If the motor is struggling DO NOT continue working, pull the drill clear of the workpiece and run it on fast speed for a minute or so allowing the motor time to cool down before you attempt a little more of the work. If the job is too hard for the drill do not continue otherwise permanent damage to the motor will occur.

Wire brushing or sanding should be carried out on the highest speed.

Concrete drilling should be carried out on the highest speed.

DO NOT overload motor when drilling concrete.

DO NOT use too much pressure as the hammer action relies on the drill bit being able to move back and forward in the hole being drilled.

Always clear the flutes of the drill bit by removing it from the hole regularly.

Wood drilling

For maximum performance, use high speed steel bits for wood drilling.

Move drilling mode selector to drilling mode .

Secure the workpiece to prevent it from turning when drilling.

Begin drilling at a very low speed to prevent the bit from slipping off the starting point. Increase the speed as the drill bit bites into the material.

When drilling through holes, place a block of wood behind the workpiece to prevent ragged or splintered edges on the back side of the hole.

Do not lock the trigger in the ‘on’ position when the drill may need to be stopped suddenly.

Metal drilling

For maximum performance, use high speed steel bits for metal or steel drilling.

Move drilling mode selector to drilling mode .

Use a centre punch to mark the hole location on the workpiece.

Begin drilling at a very low speed to prevent the bit from slipping off the starting point.

Maintain a speed and pressure which allows cutting without overheating the bit. Applying too much pressure will:

-Overheat the drill

-Wear the bearings

-Bend or burn bits

-Produce off-centre or irregular shaped holes

When drilling large holes in metal it is recommended to drill with a small bit at first, then finish with a larger bit. Also, lubricate the bit with oil to improve drilling action and increase bit life.

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Global Machinery Company HD2G250M instruction manual Hints for use, Wood drilling, Metal drilling