Drilling Metal - Ayce 5260.1 Manuel D'utilisation

4. Operation for working.
a. Screw driving
• Try to use modern designed screws for easy driving and improved grip. Install the
correct driver bit.
• Ensure that the torque adjustment collar is set to the most suitable setting, if in
doubt start with a low setting and gradually increase the setting until the most
suitable position is found.
• Use the correct speed for the job, apply minimal pressure to the trigger initially.
• Only increase the speed when full control can be maintained.
• It is advisable to drill a pilot hole first, slightly longer and just smaller than the
shank diameter of the screw to be fitted. The pilot hole will act as a guide for the
screw and will also make tightening of the screw less difficult.
• When screws are positioned close to an edge of the material, a pilot hole will also
help to prevent splitting of the wood.
• Use the correct countersinking bit to accommodate the screw head so that it does
not protrude.
• If the screw becomes difficult to drive in, remove and try a slightly larger or
longer hole but remember there must be enough material for the screw to grip!
If restarting a screw in a hole, locate and make the first few turns by hand. If the
screw is still difficult (as when using very hard woods) try using a lubricant such as
soap, liquid soap is usually best.
• Keep sufficient pressures on the drill to prevent the bit turning out of the screw
head. The screw head can easily become damaged making it difficult to drive it in
or even remove it.
b. Hole drilling
• When attempting to drill a large diameter hole, it is sometimes best to start with
a smaller drill bit then work up to the required size. This prevents overloading the
drill.
! Many accidents occur because of unforeseeable situations. Please pay
attention that drilling-out a small hole may cause the drill bit to jam in
the hole, especially when drilling metal.
WARNING
• Remember to use a "wood-pecker" action on deep holes to allow the swarf to be
ejected from the hole.
• If the drill bit snags, switch off immediately to prevent permanent damage to the
drill.
• Try running the drill in reverse to remove the bit.
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• Keep the drill in line with the hole. Ideally, the drill bit should enter at right angles
to the work. If the angle is changed during drilling, this could cause the bit to snap
off blocking the hole and perhaps causing injury.
• Reduce pressure as the drill is about to break through the item being drilled.
• Don't force the drill, let it work at its own pace.
• Keep the drill bit sharp.
c. Drilling wood
• For maximum performance when drilling larger holes, use auger bits or spade
bits for wood drilling.
• Set the tool to the drill mode.
• Begin drilling at a very low speed to prevent the bit from slipping off the starting
point. Increase the speed as it bites into the wood.
• When drilling through holes, place a block of wood behind the work piece to
prevent ragged or splintered edges on the back of the hole.
d. Drilling metal
• For maximum performance, use HSS drill bits for metal drilling.
• Set the tool to the drill mode.
• Mark off the centre of the hole using a centre punch.
• Use a suitable lubricant for the material you are working on.
• Begin drilling at a very low speed to prevent the bit from slipping off the starting
point.
• Always clamp sheet metal. Support thin metal with a block of wood to avoid
distorting it.
104 105 | GB
GB
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