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Sharp Line Premium Carbide Insert for Accurate Parting and Grooving Tasks

ERMNS-T

Application Code: ER, Profiling Geometry

“ER” indicates a profiling geometry suitable for contour grooving and light form turning. The cutting edge is typically designed with a slight corner radius to reduce stress concentration and improve surface finish. It allows flexible application in complex groove shapes.

Tolerance Grade: M, Pressed(±0.05,±0.13)

“M” stands for molded (pressed) insert grade. Pressed inserts are formed through powder metallurgy and sintering processes. Compared with ground inserts, they offer better cost efficiency and improved edge strength, making them suitable for general-purpose machining and medium cutting conditions.

Cutting Direction: N, Neutral

“N” represents a neutral insert without a dedicated left-hand or right-hand cutting orientation. It can be mounted in either direction depending on tool holder design. Neutral geometry enhances versatility and inventory efficiency.

S, Single-Ended Insert

“S” indicates a single-ended insert with one active cutting edge. Single-edge inserts provide higher rigidity and improved chip evacuation due to increased insert body support. They are commonly used in deep grooving or parting operations where stability is critical.

Chip Breaker Code: T

“T” refers to a specific chip breaker geometry designed for turning operations. The chip breaker controls chip flow direction, reduces cutting forces, and prevents chip entanglement. It improves process reliability, especially when machining ductile materials such as low-carbon steel and stainless steel.

 

Keywords:

Parting and Grooving Insert, Carbide Cutting Insert, Turning Insert, Indexable Cutting Tool, CNC Cutting Insert, Precision carbide cutter, Internal Cutting Tool, Miniature Turning Tool, Fine Metal Lathe Insert, PVD Coated Cutting Tool, CVD Coated Carbide Insert

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Description

Introduction:

The ERMNS-T parting and grooving insert is a precision indexable carbide insert engineered for stable parting-off and external grooving under medium to heavy-duty CNC turning conditions. The geometry is optimized to balance cutting force distribution, chip evacuation efficiency, and edge strength—particularly in narrow-width and deep-groove applications.

Manufactured from sub-micron grain cemented carbide, the insert provides high hot hardness and transverse rupture strength (TRS), effectively resisting plastic deformation and edge chipping under high thermal and mechanical loads. The controlled edge preparation (micro-honed cutting edge) improves edge toughness while maintaining sharpness, reducing the risk of premature failure in interrupted or semi-interrupted cuts.

The chip breaker design promotes progressive chip curling and controlled segmentation, minimizing chip packing in deep parting operations. Optimized rake geometry reduces radial cutting forces, improving process stability and lowering spindle load—critical for long overhang or slender work piece machining.

With advanced PVD/CVD multilayer coatings, the insert demonstrates strong resistance to flank wear, crater wear, oxidation, and built-up edge (BUE) formation, especially when machining stainless steel and alloy steels. Wear patterns remain predictable and uniform, allowing stable tool life management and consistent cost-per-part performance.

  1. Precision Micro-Textured Surface Engineering

ERMNS-T employs controlled micro-texturing at sub-micron levels to reduce adhesive wear, lower coefficient of friction, and enhance lubricant retention.

  1. Proprietary Multi-Functional Coating Architecture

Utilizes a multilayer coating with graded hardness and optimized surface energy, providing simultaneous wear resistance, thermal stability, and anti-oxidation performance under cyclic load conditions.

  1. Optimized Groove Topology and Flow Dynamics

Groove geometries are computationally optimized to control stress distribution, minimize material entrapment, and enhance particulate evacuation efficiency.

  1. Advanced Tribological Optimization

Surface and coating synergy designed to minimize wear coefficient while maximizing load-bearing capacity, enhancing operational longevity under high-speed or high-load conditions.

  1. Thermo-Mechanical and Corrosion Resilience

Materials and coatings exhibit superior thermal stability and corrosion resistance, resisting micro-cracking and oxidative degradation even under prolonged thermal cycling.

  1. Energy-Efficient Operational Design

Reduced frictional losses and optimized groove flow reduce operational energy consumption and heat generation, improving system efficiency.

  1. Maintenance and Reliability Enhancement

Anti-adhesive coatings and micro-surface texturing simplify cleaning cycles, reduce downtime, and prolong mean time between failures (MTBF).

 

Main technical parameters:

 

Type

 INSL S BW AN
ERMN400S_ 12.20 4.15 3.00

7°

 

Type CW RE

fn (mm/r)
ERMN400S-T 4.00 2.0

0.07-0.25

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