Kyocera CNMG120408CQ CA125P TMK00081 - Cast Iron Machining
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- Stock: In Stock
- Model: CA125P
- Weight: 0.10kg
- Manufactured: In Japan
- Ships: Worldwide
- Item Code: TMK00081
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Kyocera CNMG120408CQ CA125P — Roughing Insert
Product Overview
The Kyocera CNMG120408CQ with grade CA125P (MPN: TMK00081) is a premium indexable carbide insert engineered for Cast Iron Machining. Manufactured in Japan to stringent ISO 9001 quality standards, this insert delivers exceptional cutting performance, dimensional stability, and extended tool life across cast iron machining applications. The CQ - Cast Iron Roughing geometry ensures optimal chip formation and evacuation, reducing machine downtime and improving surface integrity.
ISO Designation Breakdown
| Position | Code | Parameter | Specification |
|---|---|---|---|
| 1 | C | Insert Shape | 80° Rhombic (Diamond) |
| 2 | N | Clearance Angle | 0° (Normal) |
| 3 | M | Tolerance Class | ±0.08mm (IC), ±0.13mm (T) |
| 4 | G | Insert Type | Hole + Chipbreaker (One-sided) |
| 5–6 | 12 | Cutting Edge Length (IC) | 12.7mm (1/2") |
| 7–8 | 04 | Insert Thickness | 4.76mm (3/16") |
| 9–10 | 08 | Nose Radius | 0.8mm |
| 11+ | CQ | Chipbreaker Style | CQ - Cast Iron Roughing |
Engineering Dimensions & Geometry
| Dimension | Metric | Imperial | Tolerance |
|---|---|---|---|
| Inscribed Circle (IC) | 12.7 mm | 1/2" | ±0.08 mm |
| Insert Thickness (S) | 4.76 mm | 3/16" | ±0.13 mm |
| Nose Radius (rε) | 0.8mm | 0.0315" | +0.10 / -0.05 mm |
| Clearance Angle (α) | 0° | 0° | ±0.5° |
| Inscribed Circle Diameter (d) | 12.7 mm | 1/2" | ±0.08 mm |
Grade Details — Key Grade Characteristics
| Property | Value / Description |
|---|---|
| Grade Designation | CA125P |
| Substrate Composition | Ultra-fine grain tungsten carbide (WC-Co) |
| Coating Technology | PVD Multi-layer (TiAlN + TiN) |
| Hardness (HRA) | HRA 91.5 |
| Transverse Rupture Strength | ≥ 2,800 MPa |
| Coating Color | Copper-Bronze |
| ISO Application Range | P15–P35, M15–M25, K15–K25 |
| Max Operating Temperature | 900°C (1,652°F) |
| Application Class | Semi-finishing to medium roughing |
Grade Comparison Matrix
| Grade | Coating | ISO Range | Best For | Speed Capability |
|---|---|---|---|---|
| CA125P | PVD TiAlN/TiN | P15-P35 / M15-M25 / K15-K25 | Steel, SS, Cast Iron | Medium-High |
| CA5525 | CVD Al₂O₃ + TiCN | P05-P25 | Steel, High-speed | High |
| PR930 | PVD TiAlN | P10-P30 / M10-M20 | General Steel | Medium |
| TN60 | Ceramic (Si₃N₄) | H01-H20 | Hardened Steel | Very High |
Chipbreaker Profile
The CQ - Cast Iron Roughing chipbreaker geometry is specifically engineered for cast iron roughing, high material removal. The land width and groove depth have been optimized through finite element analysis (FEA) to provide stable chip curling and controlled breakage across the recommended parameter window. This reduces chip entanglement, protects finished surfaces, and extends tool life by minimizing thermal cycling at the cutting edge.
| Parameter | Range | Optimal |
|---|---|---|
| Depth of Cut (ap) | 0.50–3.00 mm | Mid-range |
| Feed Rate (fn) | 0.15–0.50 mm/rev | Mid-range |
| Chip Form | 6-shaped / Segmented | Controlled breakage |
Recommended Applications & Workpiece Materials
The CA125P grade combined with the CQ - Cast Iron Roughing geometry makes this insert highly versatile for the following material groups and industrial sectors:
- Gray Cast Iron (GG20–GG35, Class 30–40): Optimized for high-speed roughing of gray cast iron. Strong edge line resists abrasive wear.
- Ductile Cast Iron (GGG40–GGG70, 65-45-12–100-70-03): Nodular iron machining with controlled chip formation. Reduced edge chipping on spheroidal graphite.
- Malleable Cast Iron (Whiteheart / Blackheart): Suitable for both ferritic and pearlitic malleable irons. Consistent tool life across batch variations.
- Compacted Graphite Iron (CGI-350, CGI-450): Higher strength CGI grades require the robust edge geometry of this chipbreaker.
- High-Silicon Cast Iron (Si >3%): Specialized coating adhesion withstands the abrasive nature of high-silicon alloys.
Application Map by Operation
| Operation | Suitability | Recommended ap | Recommended fn | Notes |
|---|---|---|---|---|
| External Turning | ★★★★★ | 0.50–3.00 mm | 0.15–0.50 mm/rev | Primary application |
| Internal Turning | ★★★★☆ | 0.50–3.00 mm | 0.15–0.50 mm/rev | Use appropriate boring bar |
| Face Turning | ★★★★☆ | 0.50–3.00 mm | 0.15–0.50 mm/rev | Ensure rigidity |
| Profiling | ★★☆☆☆ | 0.10–0.80 mm | 0.08–0.20 mm/rev | Limited by nose radius |
| Grooving | ★☆☆☆☆ | — | — | Not recommended |
| Parting Off | ☆☆☆☆☆ | — | — | Not recommended |
Recommended Cutting Conditions
The following parameters are starting recommendations for the CNMG120408CQ CA125P under stable machining conditions with adequate coolant delivery. Always optimize for your specific machine rigidity and workpiece setup.
| Workpiece Material | Brinell Hardness | Cutting Speed (m/min) | Feed (mm/rev) | Depth of Cut (mm) |
|---|---|---|---|---|
| Gray Cast Iron (GG25) | 180–220 HB | 200–350 | 0.15–0.50 | 1.0–4.0 |
| Ductile Iron (GGG50) | 180–260 HB | 150–280 | 0.15–0.45 | 1.0–3.5 |
| High-Silicon Cast Iron | 220–280 HB | 120–200 | 0.12–0.40 | 0.8–3.0 |
| Compacted Graphite Iron (CGI-450) | 200–280 HB | 140–220 | 0.15–0.45 | 1.0–3.0 |
| Malleable Cast Iron (Blackheart) | 130–200 HB | 180–280 | 0.15–0.50 | 1.0–3.5 |
Operating Guidelines
- Run-out Check: Ensure insert seat run-out is <0.01 mm to prevent uneven wear and premature failure.
- Torque Specification: Tighten clamping screw to 2.5–3.5 N·m (22–31 in·lb). Over-tightening causes micro-cracking; under-tightening causes vibration.
- Coolant Recommendation: Use water-miscible cutting fluid at 6–8% concentration for steel and stainless steel. For cast iron, dry machining or minimum quantity lubrication (MQL) is acceptable.
- Entry Angle: Maintain a lead angle (κr) of 75°–95° for optimal chip control and reduced radial forces.
- Edge Preparation: This insert features a honed T-land (0.05 mm × 20°). Do not attempt additional hand-honing.
- Inspection: Inspect the cutting edge under 10× magnification after every 30 minutes of cutting time. Replace if flank wear (VB) exceeds 0.3 mm or if chipping >0.1 mm is observed.
Toolholder Compatibility
The CNMG120408CQ conforms to ISO 1832 and is compatible with standard C-type (80° rhombic) toolholders. Select holder size to match the insert inscribed circle (IC) for proper clamping and chip evacuation clearance.
| Holder Style | Designation Example | Insert Size | Clamping | Application |
|---|---|---|---|---|
| External Turning | MCLNR/L 2525M12 | 12 (1/2") | Lever lock | OD turning, facing |
| Internal Boring | SCLCR/L 08 12 | 12 (1/2") | Screw clamp | Medium bore ID |
Packaging & Ordering Information
| Attribute | Details |
|---|---|
| Manufacturer Part Number (MPN) | TMK00081 |
| Standard Pack Quantity | 10 inserts per plastic box (industrial blister pack) |
| Individual Insert Marking | Laser-etched: CNMG120408CQ + CA125P + batch code |
| Shelf Life (unopened) | 10 years when stored in original packaging at 15–25°C, <60% RH |
| Country of Origin | Japan |
| Warranty | Full manufacturer warranty against material and workmanship defects |
Catalog Meta Data
| Field | Value |
|---|---|
| Product Family | Kyocera Turning Inserts — CA Series |
| Series | C-Type (80° Rhombic) Negative Inserts |
| Grade Family | PVD Coated Carbide (CA125P) |
| Chipbreaker Family | CQ - Cast Iron Roughing |
| Insert Standard | ISO 1832:2017 / ANSI B212.4 |
| ECCN | EAR99 (General Industrial Use) |
| HS Code | 8209.00.00 (Indexable Inserts) |
| RoHS Status | Compliant (Directive 2011/65/EU) |
| REACH Status | Compliant (No SVHC >0.1% w/w) |
Need application support? Our CNC tooling specialists can help you select the optimal grade, geometry, and cutting parameters for your specific material and operation. Contact us via the support portal or live chat for technical assistance.
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