Success Story: Cross-Hole Drilling on Railway Turnouts with the Nine9 NC Helix Drill
| Success Story: Cross-Hole Drilling on Railway Turnouts with the Nine9 NC Helix Drill This project demonstrates how the Nine9 NC Helix Drill provides a flexible and efficient solution for complex hole-making operations where conventional drilling reaches its limits, particularly when producing deep cross holes on #angled surfaces in high-tensile rail steel. ♦ Application Workpiece: Railway turnout Cross hole diameter: Ø32.4 mm Material: Rail steel with tensile strength from 800–1200 N/mm² Cooling: Air cooling only For component widths up to 180 mm and angled surface, the machining process switched to the NC Helix Drill enables a stable and accurate deep cross-hole machining. ♦ Tool SetupTool Setup • Holder: 99323-025-3050 + 300 mm extension bar • Insert: N9MX12T308 ⚙️ Cutting Parameters • Vc: 170 m/min • Fz: 0.13 mm/z • Pitch: 2.0 mm/U • S: 2000 rpm • F: 500 mm/min • Coolant: Air ♦ Why the NC Helix Drill performed successfully: ✔ Stable interpolation machining on angled surfaces ✔ Reduced cutting load compared with conventional drilling ✔ Reliable chip evacuation ✔ High precision in cross-hole applications |
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