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V100T/July 2020/V1.1
DRILLING CONDITIONS
The ease with which material can be drilled depends on several factors such as the tensile strength
and hardness. Whilst hardness and/or strength is the usual criterion, wide variations in machinability
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.
Some materials of low hardness contain abrasive substances leading to rapid cutter wear at
high speeds. Feed rates are governed by rigidity of set-up, volume of material to be removed, surface
finish and available machine power.
DRILLING A HOLE
Now that you have read the explanatory information and safety recommendations above, you are
ready to start drilling. Follow these 13 steps below for best drilling results:
1.
Install the annular cutter.
Place the pilot pin into the cutter, as shown in [Image 17]
[image 17]
