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RAILBEAST RDP-36
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13
The following figure
shows
how
annular
cutters
work.
As
the
cutter
drills into the
workpiece, the pilot pin retracts and tightens the spring. As a result, after
the
cutter
drills
through
the material, the slug core is expelled from the cutter. Also, when
pressed, the pilot pin allows application of coolant to the inside of the cutter.
Slug core
Spring
Pilot pin
Annular cutter
Arbor