Case Study Solutions BT-A Drill Case Study: Industry: Part: Material: Item: Insert: Depth: Diameter: 0901 Aerospace Landing Gear 4340 Alloy Steel 2.050” (52.07mm) 11.00” (279.4mm) #4 Series Special Super Cobalt T-A® Insert BT-A Drill head Allied Machine Solution BT-A Drill • 125 RPM • 0.006 IPR (0.15 mm/rev) • 0.75 IPM (19.05 mm/min) • Cycle time = 1 minute 20 seconds • Tool life = 43 holes (per insert) Previous Tooling Two Special Sandvik Ejector Drills • 500 RPM • 0.003 IPR (0.08 mm/rev) • 1.5 IPM (38.1 mm/min) • Cycle time = 15 minutes • Tool life = 2 holes The Advantages The BT-A Drill completed 43 pieces against Sandvik’s disappointing 2 pieces. The BT-A Drill cost was justified after only 15 parts. • Eliminated 2 hours of set-up time • Eliminated 30 minutes of deburring

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