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Ubi bene ibi patria
Join Date: Jan 2007
Location: For the most part, in my garage.
Posts: 2,530
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If I remember correctly from a technical lecture (far too many years ago), it is theoretically possible to drill any multi-sided polygon shaped hole. The trick is to set up some kind of drive unit for the bit to perform a necessary similar type motion as shown in the video. The drill bit would always have one less cutting side than number of faces in the drilled hole, hence the 3 'sided' bit for a four sided hole. I would guess maybe it follows that one could not drill a 3 sided hole. At the end of the day, it probably has limited practical applications.
Cheers
JB
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“Two possibilities exist: either we are alone in the Universe or we are not - both are equally terrifying” ― Arthur C. Clarke
"As soon as laws are necessary for men, they are no longer fit for freedom." - Pythagoras
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