High Precision ER Collet Extension Rod for CNC Machine – UM Type ER Extension Bar & Boring Bar
Premium hardened steel construction ensures extreme durability and wear resistance for long-term precision machining. Ultra-precise ER collet compatibility guarantees secure tool holding with minimal runout (<0.01mm), ideal for high-speed CNC operations. Heat-treated alloy steel body enhances rigidity, reducing vibration for superior surface finishes in milling, drilling, and boring applications. UM-type design offers extended reach for deep cavity machining, improving accessibility in tight or complex workpieces. Mirror-polished surface minimizes friction and chip adhesion, optimizing coolant flow for uninterrupted production cycles. Perfect for aerospace, automotive, and mold-making industries requiring micron-level accuracy in hardened materials. Global wholesale pricing—bulk orders available with guaranteed lowest rates worldwide.