ISSUE 1/Original version/OCT 2014
14
DRILLING A HOLE
Now that you have read the explanatory information and safety recommendations above, you are
ready to actually start drilling. Follow these 10 steps for best drilling result:
1
Use the tip of the pilot pin to determine the center of the hole to be drilled.
2
Turn the magnet on and verify that the drill is in the right position and that the machine is
pushed tight against the work piece.
3
If your machine is equipped with a auto coolant system, put open the valve to release the oil. If
your machine does not have a auto coolant system, fill the holes of the spindle with oil.
4
Turn the motor on at the highest setting and allow it to run at full speed.
5
Turn the arms to start drilling. Apply only a slight pressure when the Annular Cutter touch the
metal. Do not push the Annular Cutter with force into the metal.
6
Apply a regular pressure while drilling. The drilling performance does not improve by putting
more pressure on the tool. Too much pressure will overload the motor and your Annular Cutter
will be worn sooner.
Let the cutter do the job and give it time to cut the metal!!!
7
Adjust the oil supply when necessary, if your drill does not have a auto coolant system, stop
drilling regularly, refill the holes of the spindle and continue drilling.
8
Apply less pressure when the drill cuts through the material.
9
Turn the arms to put the motor in highest position and turn off the motor unit.
10 Remove the burr, metal chips and clean the cutter and surface without getting injuries.
Caution
: The metal piece drilled out can be sharp and very hot!!
DRILLING WITH ANNULAR CUTTERS
Annular cutters only cut material at the periphery of the hole, rather than converting the entire hole
to shavings. As a result, the energy required to make a hole is lower than for a twist drill.
When drilling with an annular cutter, it is not necessary to drill a pilot hole.
WARNING:
Do not touch the cutter or the parts close to the cutter immediately after
operation, as they may be extremely hot and cause burns to the skin. Ensure nobody is in the
work area where the metal core is ejected.
DRILLING CONDITIONS
The ease with which material can be drilled depends on several factors including tensile strength and
abrasion resistance. Whilst hardness and/or strength is the usual criterion, wide variations in
machineability can exist among material showing similar physical properties.
The drilling conditions are dependent on requirements for tool life and surface finish. These
conditions are further restricted by the rigidity of the tool and the work piece, lubrication and
machine power available. The harder the material, the lower the cutting speed.
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www.globalweldingsupplies.com
13 Patiki Road Avondale, Auckland 1026
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