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Kyocera TNMG160408 CA125P TMK00229 Turning Insert - General Turning

Kyocera TNMG160408 CA125P TMK00229 Turning Insert - General Turning
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Kyocera TNMG160408 CA125P TMK00229 Turning Insert - General Turning
$3.78 USD
$6.30 USD
1 or more $3.78 USD
  • Stock: In Stock
  • Model: CA125P
  • Weight: 0.10kg
  • Manufactured: In Japan
  • Ships: Worldwide
  • Item Code: TMK00229
This product has a minimum quantity of 10
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Product Overview

The Kyocera TNMG160408 CA125P TMK00229 is a premium turning insert engineered for general turning operations in modern CNC turning centers. Manufactured in Japan to exacting ISO 1832 standards, this triangular insert delivers exceptional dimensional accuracy, superior surface finish, and extended tool life across a broad spectrum of ferrous and non-ferrous workpiece materials.

Featuring a negative insert design with optimized chipbreaker geometry, the TNMG160408 ensures stable chip evacuation even at elevated cutting parameters. The CA125P grade substrate combines a ultra-fine tungsten carbide base with a multi-layer TiAlN PVD coating, offering an optimal balance between wear resistance and mechanical toughness for continuous and light interrupted cuts.

ISO Designation Breakdown

The TNMG160408 designation follows the ISO 1832:2004 standard for indexable inserts. Each alphanumeric segment conveys critical geometric and tolerance information:

ISO CodeMeaningSpecification
TInsert ShapeTriangular (60°)
NRelief Angle0° (Negative)
MTolerance Class±0.005–0.13 mm
GInsert TypeWith Hole + Countersink
16/22Inscribed Circle16 = 9.525 mm / 22 = 12.7 mm
04/08/12/16Thickness4.76 / 6.35 / 7.94 / 9.52 mm
04/08/12/16Nose Radius0.4 / 0.8 / 1.2 / 1.6 mm

Engineering Dimensions & Geometry

ParameterValueTolerance
Inscribed Circle (IC)9.525 mm±0.025 mm
Insert Thickness (S)4.76 mm±0.13 mm
Nose Radius (R)0.8 mm±0.05 mm
Relief Angle0° (Negative)
Inscribed Circle ToleranceM-class (±0.05–0.13 mm)
Chipbreaker Width0.8–1.4 mm (geometry dependent)±0.05 mm
Hole Diameter4.4 mm (size 16) / 5.5 mm (size 22)+0.1 mm
Countersink Angle60° / 90° (double for TNMM)±2°

Grade Details – Key Grade Characteristics

The CA125P grade is a PVD-coated carbide specifically developed for high-performance steel and stainless steel machining. Its ultra-fine grain structure (0.8 μm WC) provides exceptional edge sharpness and coating adhesion.

PropertyCA125P Specification
SubstratePVD-Coated Carbide
CoatingTiAlN Multi-layer PVD
Hardness1,600 HV
Transverse Rupture Strength3,200 MPa
Application RangeSteel (P10–P30), Stainless Steel (M10–M20)
Max Cutting Temp900°C

Grade Comparison Matrix

Select the optimal grade based on your specific machining requirements. The matrix below compares CA125P against other popular Kyocera grades in the same application family:

GradeSpeed CapabilityWear ResistanceToughnessBest For
CA125P★★★★☆★★★★☆★★★☆☆High-speed steel finishing
CA115P★★★★★★★★★★★★☆☆☆Ultra-high-speed finishing
CA135P★★★☆☆★★★☆☆★★★★☆Interrupted cuts / roughing
PR1535★★★★☆★★★★☆★★★☆☆Stainless steel machining

Chipbreaker Profile

TNMG160408 Chipbreaker Geometry: General purpose chipbreaker with versatile geometry for balanced chip control and edge strength.

  • Land Width: Optimized for general turning feed rates
  • Groove Depth: 0.15–0.25 mm (ensures controlled chip curl)
  • Rake Angle: 15°–18° (reduces cutting forces and heat generation)
  • Edge Preparation: Honed T-land (0.05–0.10 mm) for edge stability

Recommended Applications & Workpiece Materials

The TNMG160408 CA125P is ideally suited for the following material groups and industrial sectors:

  • Carbon Steels: C35, C45, C60 — excellent for automotive shafts and general engineering components
  • Alloy Steels: 42CrMo4, 16MnCr5, 20MnCr5 — ideal for gear blanks and transmission parts
  • Stainless Steels: AISI 304, 316, 410 — suitable for food processing and medical equipment machining
  • Tool Steels: H13, D2, O1 — recommended for die and mold manufacturing
  • Cast Irons: GG25, GGG40 — proven performance in pump housings and valve bodies
  • Free-Cutting Steels: 11SMn30, 11SMnPb30 — optimized for high-speed Swiss-type lathe operations

Application Map by Operation

Use the following compatibility matrix to match the TNMG160408 with your specific turning operation:

Operation TypeSuitabilityRecommended FeedNotes
External Turning★★★★★0.10–0.35 mm/revPrimary application
Internal Turning★★★★☆0.08–0.25 mm/revUse with appropriate boring bar
Face Turning★★★★☆0.12–0.30 mm/revExcellent chip evacuation
Profiling★★★☆☆0.05–0.15 mm/revLimited by nose radius
Grooving★☆☆☆☆Not recommendedUse dedicated grooving inserts

Recommended Cutting Conditions

The following parameters serve as starting recommendations. Fine-tune based on machine rigidity, coolant delivery, and workpiece condition:

Workpiece MaterialCutting Speed (m/min)Feed Rate (mm/rev)Depth of Cut (mm)
Carbon Steel (C45)180–2500.15–0.350.5–3.0
Alloy Steel (42CrMo4)150–2200.12–0.300.5–2.5
Stainless Steel (304)120–1800.10–0.250.5–2.0
Tool Steel (H13)100–1500.08–0.200.3–1.5
Cast Iron (GG25)200–2800.20–0.401.0–4.0

Operating Guidelines

  • Coolant: Use high-pressure coolant (≥70 bar) directed at the cutting edge for optimal chip breaking and heat dissipation.
  • Tool Overhang: Minimize overhang to ≤4× toolholder shank diameter to prevent vibration and chatter.
  • Insert Position: Ensure the insert sits flush in the pocket; verify seating with a torque-calibrated key (recommended 3.5 N·m).
  • Edge Wear Monitoring: Inspect flank wear (VB) every 15–20 min. Retire insert when VB exceeds 0.3 mm or crater wear reaches 0.15 mm.
  • Speed Ramp: Start at the lower end of the recommended speed range and increase in 10% increments while monitoring tool life.
  • Workpiece Runout: Maintain runout ≤0.02 mm to avoid uneven load distribution and premature edge chipping.
  • Storage: Store inserts in original packaging away from corrosive atmospheres. Avoid mixing used and new inserts.

Toolholder Compatibility

The TNMG160408 is compatible with standard 60° triangular negative-type toolholders. Verify pocket geometry and clamping mechanism before ordering:

Toolholder SeriesCompatible SizeClamping TypeApplication
MTJNR/L16/22 mmLever LockExternal turning
STFCR/L16/22 mmScrew ClampExternal finishing
DTJNR/L16/22 mmLever LockHeavy roughing
WTJNR/L22 mmLever LockLarge component turning
S16Q/S22Q-MTJNR/L16/22 mmLever LockInternal turning

Packaging & Ordering Information

All genuine Kyocera inserts are shipped in manufacturer-original packaging with full traceability:

AttributeDetails
Packaging TypeIndividual plastic pocket + anti-corrosion oil
Quantity per Pack10 inserts
MPN (Manufacturer Part Number)TMK00229
BarcodeEAN-13 compliant
Weight per InsertApprox. 4.2 g (size 16) / 7.8 g (size 22)
Storage ConditionsDry environment, 15–25°C, avoid direct sunlight

Catalog Meta Data

Technical reference and traceability information for procurement and inventory management:

FieldValue
Product LineKyocera Turning Insert Series
Catalog Year2026
RevisionRev. 3.2
Page ReferenceTurning Catalog p. 142–158
ISO 1832 ClassificationTNMG160408 CA125P
Country of ManufactureJapan
Warranty12 months manufacturer defect coverage

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This package contains a genuine Kyocera product manufactured according to strict global quality standards. Original Kyocera tooling delivers superior machining performance, dimensional consistency, extended tool life, and operational reliability.
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Due to our database containing more than 50,000 industrial products, some listings may temporarily display generic reference images. Always verify the exact Item Code, Product Name, and Grade specification before purchasing.
  • Confirm dimensions, geometry, coating, and grade using the official Kyocera item code.
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    Please verify machine compatibility, insert geometry, coating, and application grade before placing your order.
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