On 2013-08-20, Joe AutoDrill wrote:
So I promised to post some of our challenges here...

Anyhow... He calls me a few days ago with a new challenge. He needs to
drill six holes in one stroke. 7/8" diameter in ductile cast iron.
Nothing fancy, just needs thru holes for mounting a flange-type part.

[ ... ]

We came up with a staggered length head design that we believe will work
for him. In essence, the machine will only see the load of two holes at
a time as the "bits" will pass thru the part before the next two engage,
etc.

Just out of curiosity -- is he going to be using split-point
drills? He should, as they should reduce the thrust needed
significantly.

Enjoy,
DoN.

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