Cleaning And Maintenance - 9&1 70051 Instrucciones De Uso

Warning
： If the drill stalls, release the trigger immediately, remove the drill from the work and
determine the cause of the stalling. Do not click the switch on and off as this can damage the motor.
To minimize the chance of stalling and breaking through the material, reduce the pressure on the drill and ease the bit
through the last part of the hole.
Keep the motor running when pulling the bit back out of a drilled hole. This will help prevent jamming.
Metal drilling
For maximum performance, use high speed steel bits for metal or steel drilling.
Push drilling mode selector to drilling mode
Use a center punch to mark the hole location on the work-piece.
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 bearing, bend or burn bits, produce off-center 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.
Wood drilling
For maximum performance, use high speed steel bits for wood drilling.
Push the drilling mode selector to drilling mode
Secure the work-piece 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 work-piece 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.
Masonry drilling
For maximum performance use tungsten carbide-tipped masonry impact bits when drilling holes in brick, tile, concrete,
etc.
Push the drilling mode selector to impact mode
Apply light pressure and medium speed for best results in brick.
Apply additional pressure and high speed for hard materials such as concrete.
When drilling in tile, practice on a scrap piece to determine the best speed and pressure.
WARNING!
If any of the following events occur during normal operation, the power supply should be
shut off at once and tool thoroughly inspected by a qualified person and repaired if necessary:
The rotating parts get stuck or speed drops abnormally low.
The tool shakes abnormal accompanied by some unusual noise.
The motor housing gets abnormal hot.
Heavy sparks occur around the motor area.

Cleaning and maintenance

CAUTION!
Certain cleaning agents and solvents damage plastic parts. Some of these are: gasoline,
carbon tetrachloride, chlorinated cleaning solvents, ammonia and household detergents that
contain ammonia.
The brushes should be checked periodically and worn-out brushes should be replaced in time.