Case Study Solutions BT-A Drill Case Study: Industry: Part: Material: Holder: Insert: Depth: Diameter: 0902 General Machining Cylinders 1045 Steel 1.375" (34.9mm) 17.7" (449.6mm) blind hole 4C12H-0112-HE 1.375" 807 series Allied Machine Solution BT-A Drill • 750 RPM • 0.0118 IPR (0.30 mm/rev) • 8.85 IPM (224.8 mm/min • Cycle time = 1 minute 59 seconds (per hole) • Tool life = 900 linear inches Previous Tooling Ingersoll Brazed BTA Head • 800 RPM • 0.0074 IPR (0.19 mm/rev) • 5.9 IPM (149.9 mm/min) • Cycle time = 2 minutes 43 seconds (per hole) • Tool life = 750 linear inches The Advantages The BT-A Drill delivered a much straighter hole with less than 0.010 variance in cylinder wall thickness. • Reduced cost per hole from $1.60 to $1.36 • Increased tool life by 20% • Total co

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