Kyocera TN60 Left Hand Cermet Micro Boring Insert with R0.4 Nose Radius for High Gloss Mirror Finishing

Product Overview

TBGT060104L TN60 is authentic original Kyocera single-sided positive triangular uncoated cermet micro boring insert, professionally developed for universal semi-finishing and ultra-precision mirror finishing of miniature thin-wall steel and stainless steel micro parts. Equipped with L left-hand dedicated cutting geometry, ultra-slim 1.59mm thin substrate and balanced R0.4 micro nose radius, each insert provides three independent reusable cutting edges to lower single-piece tool consumption cost. Adopting TN60 anti-sticking coating-free cermet substrate, it perfectly matches STUPR06 slim left-handed micro boring bars and EZ-Bar deep tiny hole tool system. The 11° extra large positive rake drastically reduces cutting load and thin-wall elastic deformation, suitable for smooth continuous high-speed finishing without coolant. Widely applied on Swiss sliding head automatic lathes and small precision CNC lathes for medical micro implants, automotive electronic micro sensors, miniature hydraulic micro valves and watch micro hardware batch high-gloss precision machining.

Key Features

• 11° extra large positive rake sharp edge design, ultra-low cutting resistance, effectively suppress elastic deformation of ultra-thin-wall sensitive micro metal parts under light-medium feed finishing parameters
• Equilateral triangular single-sided compact structure with three independent usable cutting edges, economical choice for high-volume miniature precision finishing workshops
• Ultra-slim 1.59mm thin insert body, narrow slim profile easily reaches deep narrow blind tiny holes unreachable by standard large-size boring inserts
• L symmetrical left-hand exclusive cutting geometry, perfect matching miniature left internal boring bars for reverse deep inner hole semi-fine precision processing
• TN60 special uncoated cermet formula, ultra-smooth surface minimizes friction, completely solves stainless steel chip sticking and residual burr problems in high-speed continuous finishing
• Hybrid TiC-NbC hard phase substrate, excellent high-speed abrasion resistance, maintains stable dimensional accuracy for long-hour continuous batch production
• Super-fine grain metal ceramic base, sharp yet slightly tough cutting edge, prevents micro chipping under low-feed light finishing cuts
• Miniature IC6.35 compact size, compatible with all mainstream slim micro boring bar systems for automatic lathe micro part production
• High-precision micro positioning hole, high repeat indexing accuracy after insert replacement, consistent mirror surface roughness for long continuous mass production batches

Technical Specifications

Applicable Workpiece Materials

• Mild carbon steel, 45# structural steel, low alloy structural steel, 304/316 austenitic stainless steel, free-cutting steel, low-hardness pre-hardened mold steel

Typical Industrial Application Scenarios

Machining Operations

• Balanced semi & mirror micro fine turning, deep miniature blind inner hole semi-fine boring, ultra-thin wall low-deformation stainless steel micro part finishing, miniature small shaft smooth surface high-gloss machining

Mass Production Workpieces

• Medical precision micro hardware: thin stainless steel micro tube, miniature implant fitting semi-mirror surface ultra-fine finishing
• Automotive electronics: tiny stainless steel micro sensor sleeve, miniature wiring terminal deep tiny inner hole precision boring
• Hydraulic & pneumatic micro hardware: micro thin-wall valve sleeve, miniature pipe joint high-accuracy sealing surface semi-finish machining
• Watch & micro machinery: tiny thin steel micro shaft, miniature positioning sleeve batch mirror finish mass production
• Swiss automatic lathe micro parts: miniature steel fastener, seamless thin stainless steel tube inner hole balanced precision finishing