Pramet CNMG190612E-SM T9415 Thick MT-CVD Coated 80° Rhombic Turning Insert R1.2 CNMG643-SM For Medium Rough & Semi-Finish Alloy Forged Steel CNC Lathe Machining CNC Tools

CNMG190612E-SM (short mark CNMG643-SM) T9415 is a large-size double-sided negative rhombic turning insert developed by Pramet for universal medium roughing and semi-finishing of steel materials. Equipped with SM balanced multi-purpose chipbreaker, E-type reinforced anti-chipping edge chamfer and moderate R1.2 nose radius, each insert provides four durable usable cutting edges to lower single-piece machining cost. Adopting T9415 latest thick MT-CVD high-temperature resistant coating substrate, it perfectly matches MCLNR19 heavy-duty external turning holders, balancing stock removal efficiency and machined surface quality, suitable for both continuous smooth turning and mild interrupted forging blank processing. Widely applied on heavy CNC lathes, horizontal turning centers for automotive, hydraulic, mold, wind power and heavy machinery mass metal manufacturing.

• Super-large IC19.05 size + 6.35mm ultra-thick rigid substrate, withstand stable medium heavy cutting load, minimal cutting vibration
• Double-sided 80° rhombic negative structure, four independent usable cutting edges, higher cost efficiency than single-sided small inserts
• E-type edge reinforced chamfer design, effectively prevent micro edge collapse when cutting uneven forged blanks with slight interruption
• SM balanced medium rough chipbreaker geometry, moderate chip groove space, split steel chips into neat curled fragments without scratching finished surfaces; compatible for both semi-finish and medium rough operations
• T9415 fourth-generation thick MT-CVD composite coating, thick aluminum oxide layer blocks cutting heat, greatly slow flank wear and crater wear, support higher cutting speed & longer tool life
• Functionally gradient carbide substrate, balanced hardness and impact toughness, covers ISO P05-P30 full steel range, replace multiple old grades to simplify workshop inventory
• Dual international standard naming system (metric CNMG190612 / inch shorthand CNMG643-SM), convenient for global customers’ order inquiry and unified stock management
• Precision standard positioning hole, high repeat indexing accuracy after edge replacement, stable dimensional tolerance for long batch production

• Mild carbon steel, 45# structural steel, alloy structural steel, pre-hardened mold steel, hot forged steel blanks, low alloy cast steel