Case Study 2: Improving the Drill Process

What Are We Trying to Accomplish?

Determine the optimum speeds and feeds for drilling carbon steel tube sheets. A new machine was purchased in 2005 and was drilling three times faster than existing drills. Tooling was new and experiments were run to establish operating parameters. Because it was a new machine, operators were very careful with it. The new machine was producing the same output as three other drills and resulted in work patterns for the operators.
We were using Supplier K drills at slower speeds and feeds than the high speeds and feeds of the experiment. Supplier M tool representative wanted us to try a new drill they had and thought it would be competitive with the K drills we were ...

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