[Puzzdre]

Where did I go wrong?

Just broke 3 (three !) 2 mm HSS cobalt bits trying to make the wblock like Xjinn's, just to see how it performs.

I drilled on my drill press, with max speed (2800 rpm), with lots of in and outs with drill bit, lubricating with oil and WD 40. I even put the block into the freezer to make it less gummy, than drilled one or two holes...

Just wasted two good pieces of copper. Anyone have any good ideas how to take the broken bits out of the block?

The broken parts are fully inside the block (hole) so I can't take it out with pliers or similar.

All I can think of is to try to drill the hole on the opposite side of the block and try to hit the right spot to hit the broken bit out...

Any ideas,
and
WHERE I DID GO WRONG?????

Thx for all the help!