CNMM-Einsatz

CNMM insert angle:0° Negative rake insert with a single-sided chipbreaker；

80° Rhombus-Dreheinsatz;

Primary workpiece material: stainless steel, steel, brass, bronze, aluminium and cast iron;

Breaker application: Rough, heavy, semi-finshing;

Matching TurningTool Holder: PCBNR/L, PCLNR/L, MCLNR/L,MCBNR/L;

Grade: CVD;

Material : Tungsten Carbide

CNMM Insert Specifications

Heavy and semi-heavy machining require chip breakers designed for the task. Wide chip breakers optimize chip control at large depths of cut and high feeds. Cutting edge strength is maximized with a flat, negative land design. Conversely, finishing operations benefit from smaller chip breakers to facilitate chip breaking due to reduced cutting force. In finishing, prioritize cutting edge sharpness with a positive land and small edge honing. CNMM insert excel in roughing applications.

CNMM insert tool holder

MCLNR/L

CNMM insert Introduction

1. Dimensions
- Die Form: Rhombisch (Diamant) mit einem eingeschlossenen Winkel von 80 Grad.
- Freiraum-Winkel: Negative (typically in the range of -5 to -7 degrees).
- Tolerance: Medium (‘M’) is typical, but other tolerances may exist for specialized needs.
- Eingeschriebener Kreis (IC): Determines the overall insert size (common: 12.7mm, 16mm).
- Die Dicke: Impacts strength and cutting edge count (common: 4.76mm, 6.35mm).
- Eckradius: Affects strength and surface finish (common: 0.4mm, 0.8mm, 1.2mm).
2. Chipbreaker Geometries
- Hugely Important: Chipbreakers shape how chips form and break, ensuring efficient chip flow, tool protection, and workpiece finish.
- Manufacturer-Specific: Chipbreaker designations are coded into the CNMM code (the “MM”). Refer to manufacturer catalogs for the specifics.
- Match to Operation: Consider:
  - Material des Werkstücks
  - Depth of cut (light vs. heavy)
  - Desired finish
3. Hole Configuration
- Central Hole: For secure clamping on toolholders.
- Hole-less: Rely on alternative clamping mechanisms.
- Toolholder Compatibility: Essential to match the insert’s hole configuration to your toolholder.
4. Coating and Substrate
- Beschichtung: Common types include TiN, TiAlN, CVD, and PVD. Each offers different wear resistance, thermal properties, and suitability for various materials.
- Substrat: The base carbide material the coating is applied to. Compositions vary, offering toughness vs. wear resistance trade-offs.
- Application-Specific: The right grade is crucial for optimal performance and tool life.

CNMM Insert Dimensions (ISO)

ISO-Bezeichnung	Beschrifteter Kreis (IC)	Dicke	Eckradius
CNMM 120404	12,7 mm (0,5")	4,76 mm (0,187")	0,4 mm (0,016")
CNMM 120408	12,7 mm (0,5")	4,76 mm (0,187")	0,8 mm (0,031")
CNMM 120412	12,7 mm (0,5")	4,76 mm (0,187")	1,2 mm (0,047")
CNMM 160608	16mm (0.63")	6,35 mm (0,25")	0,8 mm (0,031")

Example: CNMM 120408

Rhombic (diamond) shape with an 80-degree included angle
Negativer Freiwinkel
Manufacturer-specific details within the “MM” designation
12mm inscribed circle diameter (approx. 0.47″ in inches)
4mm thick (approx. 0.157″ in inches)
0,8mm Nasenradius (ca. 0,031″ in Zoll)

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