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| Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Breaking drill bits in cast iron
I got some cast iron from Metal Express and milled a small cube, about
an inch in each dimension. Then I tried to drill a 1/8 inch hole through it. Just as the bit was emerging, it broke. So I tried it again, this time with lubrication, and the same thing happened. I do not understand this. The cast iron is soft and easily drilled. What is causing this, and what can I do about it? Thanks, Will |
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