Pramet VNMG160408E-SF T8415 35° Rhombic PVD Coated Turning Insert for Precision Finishing on Stainless Steel & Alloy CNC Lathe

VNMG160408E-SF (short mark VNMG332-SF) T8415 is a 35° narrow rhombic double-sided negative turning insert developed by Pramet dedicated to high-precision fine finishing of stainless steel, alloy steel and heat-resistant super alloys. Equipped with SF sharp micro-finish chipbreaker, E-type micro reinforced edge chamfer and smooth R0.8 nose radius, each insert provides four independent usable cutting edges to lower per-piece processing cost. Adopting versatile T8415 TiBN PVD anti-sticking coating substrate, it perfectly matches MVJNR series profiling tool holders; the narrow 35° included angle easily reaches deep narrow cavities, long tapers and small inner bores inaccessible by 80° square inserts. Widely applied on CNC lathes, Swiss sliding head automatic lathes for medical hardware, aerospace, automotive electronics and hydraulic precision thin-wall metal finishing.

• Unique 35° narrow rhombic geometry, superior accessibility for long taper profiling, deep narrow grooves and miniature inner hole finishing
• Double-sided negative structure with four usable cutting edges, excellent cost efficiency for high-volume precision finishing workshops
• E-type micro edge reinforced chamfer design, prevents tiny edge collapse under light, low-feed finishing cuts of thin-wall soft stainless steel
• SF exclusive fine-finish chipbreaker: highly positive micro rake without heavy T-land, extremely low cutting resistance, splits sticky stainless chips into tiny fragments to eliminate surface scratching and chip winding
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• T8415 advanced multi-layer PVD coating with top TiBN lubricating layer, outstanding anti-BUE performance to solve stainless steel material sticking problems, stable mirror surface quality
• Submicron gradient carbide substrate, sharp yet tough cutting edge, resists work hardening of austenitic stainless steel and nickel-based super alloys
• Dual international standard naming system (metric VNMG160408 / inch shorthand VNMG332-SF), convenient for global customer order inquiry and unified inventory management
• Precision standard positioning hole, high repeat indexing accuracy after edge replacement, consistent dimensional tolerance for long continuous batch finishing

• Mild carbon steel, alloy structural steel, 304/316 austenitic stainless steel, duplex stainless steel, nickel-based heat-resistant super alloys, low-hardness thin-wall seamless steel tubing