How Can I Drill Into Hardened Steel Calipers?

one way to get a hole in hardened material is to lap it through. take a small bit of clay (playdoh) and make a small wall around the hole location and fill it with lapping compound. then take a piece of copper tubing and mount it in the drillchuck. using an up and down motion cut the hole with lapping compound. its not fast but works. bill
 
bfd said:
one way to get a hole in hardened material is to lap it through. take a small bit of clay (playdoh) and make a small wall around the hole location and fill it with lapping compound. then take a piece of copper tubing and mount it in the drillchuck. using an up and down motion cut the hole with lapping compound. its not fast but works. bill
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Interesting
I've never tried to lap a hole into a piece. Might have been faster then the last time I tried to drill through a hardened piece. I had to drill a chainsaw bar. I went through 4 drills & sharpened those drills more times then I cared to count.
 
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