I love the multiple spindle idea!

What type of HP does the drilling machine have?

What type of clearance do you have at the end of the tube? Can you shift
the tool 1" and have the last bit drill / deburr air or is there a clearance
issue?

It may come down to the fact that you can do most of teh holes in a single
shot and then have to either drill or clean up a hole or two by hand because
you can't simply move the head to where it needs to be...

Of course, there is the option of a 30 spindle head that has 15 spindels
across from another 15 spindles spaced at 2" so all you have to do is drill,
stroke the table in the X or Y access across the holes to clear the tube and
deburr... But we are talking about a serious drilling machine now. Not
even sure an old Bridgepirt could handle the stresses involved. Might have
to build a custom machine to do that. Maybe direct drive the head with a
motor or two and build a manual slide aparatus?


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Regards,
Joe Agro, Jr.
http://www.autodrill.com
http://www.multi-spindle-heads.com

V8013

My eBay: http://tinyurl.com/4hpnc