Kyocera CNMG120404PG CA125P TMK00008 Turning Insert - General Purpose
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- Stock: In Stock
- Model: CA125P
- Weight: 0.10kg
- Manufactured: In Japan
- Ships: Worldwide
- Item Code: TMK00008
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Product Overview
The CNMG120404PG CA125P TMK00008 is a premium diamond insert manufactured by Kyocera in Japan. Engineered for general purpose applications, this negative-style insert offers two usable cutting edges per side, delivering exceptional cost-per-edge economy. The sharp point for profiling and finishing. With 12mm inscribed circle diameter, 4.76mm thickness, and 0.4mm nose radius, this insert provides optimal cutting geometry for general purpose operations on CNC turning centers. The PG (Positive General) geometry combined with CA125P PVD coating ensures reliable chip control, extended tool life, and consistent surface finish across a broad spectrum of steel workpiece materials.
ISO Designation Breakdown
The CNMG120404PG follows the ISO 1832 standard indexable insert designation system:
- C — 80° rhombic shape (diamond, two cutting edges)
- N — 0° clearance angle (negative insert, double-sided)
- M — Tolerance class ±0.13mm (inscribed circle & thickness)
- G — Cylindrical hole with countersink (double-sided clamping)
- 12 — 12mm inscribed circle diameter (IC)
- 04 — 4.76mm nominal thickness
- 04 — 0.4mm nose radius
- PG — PG (Positive General) chipbreaker geometry
Engineering Dimensions & Geometry
| Parameter | Value | Notes |
|---|---|---|
| Inscribed Circle (IC) | 12mm | Standard ISO tolerance |
| Thickness | 4.76mm | Nominal insert thickness |
| Nose Radius | 0.4mm | Corner geometry for surface finish |
| Clearance Angle | N (0° Negative / Neutral) | Negative insert (double-sided) |
| Tolerance Class | M (±0.13mm Inscribed Circle & Thickness) | ISO standard |
| Hole Type | G (Cylindrical Hole with Countersink) | Clamping configuration |
| Chipbreaker | PG (Positive General) | Application-specific geometry |
| Cutting Edges | 2 per side | Double-sided negative insert |
Grade Details — Key Grade Characteristics
CA125P is a PVD-coated carbide grade specifically developed for steel machining (ISO P25 application group). PVD-coated carbide for general steel machining with balanced toughness and wear resistance. The multi-layer PVD coating provides outstanding wear resistance, thermal stability, and extended tool life in both continuous and interrupted cutting conditions.
- Substrate: Fine-grained tungsten carbide (WC-Co) with optimized cobalt binder content
- Coating: Multi-layer PVD, 2–4 μm total thickness
- Hardness: 1,550 HV (Vickers hardness)
- Transverse Rupture Strength: 3,000 MPa
- Application Group: ISO P25 (steel machining)
- Max Operating Temperature: 850°C
- Best For: General steel turning & semi-roughing
Grade Comparison Matrix
| Grade | Coating | ISO Group | Speed | Finish | Best For |
|---|---|---|---|---|---|
| CA125P | PVD TiAlN | P25 | Medium-High | Good | General steel machining |
| CA115P | PVD TiAlN/TiN | P15 | High | Excellent | Steel finishing & semi-finishing |
| CA135P | PVD TiAlN | P35 | Medium | Good | Heavy-duty steel roughing |
| PR660 | CVD TiC-TiCN-Al₂O₃ | P20-P30 | Medium | Good | Interrupted steel cutting |
| PR930 | CVD Multi-layer | P30-P40 | Low-Medium | Fair | Heavy roughing & cast iron |
Chipbreaker Profile
The CNMG120404PG features the PG (Positive General) chipbreaker, a versatile geometry designed for general-purpose turning across a wide range of cutting parameters. The balanced groove width and land design provide reliable chip control for both finishing and medium-duty operations in standard steel machining.
- General-purpose groove for versatile application range
- Balanced chip control across varied feeds and depths
- Optimized for depths of cut (0.3–2.5mm)
- Reliable performance in carbon and low-alloy steels
- Good compromise between surface finish and material removal rate
- Suitable for job shops and mixed production environments
Recommended Applications & Workpiece Materials
The CNMG120404PG CA125P is optimized for the following materials and application scenarios:
- Carbon Steels: C35, C45, C50, 1045, 1050 — Excellent performance
- Alloy Steels: 4140, 4340, 16MnCr5, 20MnCr5 — Consistent tool life
- Tool Steels: H13, D2, O1 — Pre-hardened material machining
- Bearing Steels: 100Cr6, 52100 — Precision surface requirements
- Cast Steels: GS-25, GS-45 — General cast steel components
Note: For austenitic stainless steels (304, 316), consider grade CA6535 or PR1225 for optimal performance.
Application Map by Operation
| Operation | Feed Range | Depth of Cut | Performance |
|---|---|---|---|
| General Turning | 0.10–0.30 mm/rev | 0.3–2.5 mm | Reliable chip control |
| Semi-Finishing | 0.08–0.25 mm/rev | 0.5–1.5 mm | Good surface finish |
| Internal Boring | 0.08–0.20 mm/rev | 0.3–1.2 mm | Stable performance |
| Face Turning | 0.10–0.28 mm/rev | 0.5–1.8 mm | Consistent results |
Recommended Cutting Conditions
| Workpiece Material | Cutting Speed (Vc) | Feed (f) | Depth of Cut (ap) |
|---|---|---|---|
| Low-Carbon Steel (<0.25% C) | 140–260 m/min | 0.10–0.30 mm/rev | 0.3–2.5 mm |
| Medium-Carbon Steel (0.25–0.6% C) | 126–234 m/min | 0.10–0.30 mm/rev | 0.3–2.5 mm |
| High-Carbon Steel (>0.6% C) | 112–208 m/min | 0.10–0.30 mm/rev | 0.3–2.5 mm |
| Alloy Steel (Cr-Mo series) | 119–221 m/min | 0.10–0.30 mm/rev | 0.3–2.5 mm |
| Pre-Hardened Steel (30–45 HRC) | 98–182 m/min | 0.10–0.30 mm/rev | 0.3–2.5 mm |
Values are starting recommendations. Adjust based on machine rigidity, coolant application, and workpiece condition. Use lower end for interrupted cuts or less rigid setups.
Operating Guidelines
- Coolant: Flood coolant recommended at 6–8% concentration for optimal chip evacuation and thermal management. Minimum flow rate 5 L/min directed at the cutting edge. For hard turning (PQ chipbreaker), consider minimum quantity lubrication (MQL) or dry cutting to avoid thermal shock.
- Tool Overhang: Keep tool overhang to minimum possible (≤4× shank diameter for boring bars). Excessive overhang promotes vibration and chatter marks, especially with larger 12mm inserts.
- Insert Seating: Clean toolholder pocket and insert seat thoroughly before mounting. Negative inserts require precise seating for both top and bottom surfaces. Use torque wrench for screw clamping (recommended 2.5–3.5 N·m).
- Edge Preparation: Do not touch the cutting edge with bare fingers. Oils and moisture can promote micro-chipping at high temperatures. Handle inserts with clean gloves or edge protectors.
- Wear Monitoring: Monitor for flank wear (VBmax = 0.3mm) and crater wear (KT = 0.15mm). Replace insert before catastrophic failure to protect workpiece surface. With 2 edges per side, index promptly when wear limits are reached.
- Speed Ramping: When starting a new batch, begin at 70% of recommended Vc and increase incrementally to find the stable operating window for your specific machine and setup. For PG chipbreaker, optimal performance is typically achieved at 80–90% of max Vc.
- Index Strategy: As a double-sided negative insert, this tool offers 2×2 = 4 total cutting edges. Index systematically to maximize economy and maintain consistent tool life tracking.
Toolholder Compatibility
The CNMG120404PG is compatible with standard MCLNR/L and PCLNR/L toolholders designed for 80° diamond negative inserts with 12mm IC. The sharp 80° point angle enables precise profiling, facing, and contouring operations with excellent accessibility to tight corners and shoulders.
- Toolholder series: MCLNR, MCLNL, PCLNR, PCLNL
- Clamping: Lever type or top-clamp (double-sided)
- Insert seat angle: 0° negative
- Compatible shank sizes: 16×16mm, 20×20mm, 25×25mm, 32×32mm
- Max overhang for boring: 4× tool diameter
Packaging & Ordering Information
- Packaging: Each insert is individually sealed in anti-corrosion VCI (Volatile Corrosion Inhibitor) film and packed in Kyocera-branded plastic boxes of 10 inserts.
- Minimum Order: 10 inserts (1 box). Bulk pricing available for quantities of 50, 100, and 500 inserts.
- MPN: TMK00008 — Use this manufacturer part number for precise ordering and inventory tracking.
- Batch Number: 26-5342 — Traceability code for quality control and warranty claims.
- Warranty: 12-month manufacturer warranty against material and coating defects under normal operating conditions.
- Storage: Store in original packaging at 15–25°C, humidity <60% RH. Avoid direct sunlight and contact with corrosive chemicals.
Catalog Meta Data
| Attribute | Value |
|---|---|
| Product Family | Kyocera Turning Inserts — CA125P Series |
| Series Code | KY-896039 |
| Insert Standard | ISO 1832:2017 |
| Coating Standard | JIS B 4053 |
| Carbide Grade Class | P25 (ISO 513) |
| RoHS Compliance | Yes — Lead-free cobalt binder |
| REACH Compliance | Yes — No SVHC substances >0.1% |
| Country of Origin | Japan |
| Manufacturing Plant | Kyocera Corporation, Kagoshima Plant |
| Quality Certification | ISO 9001:2015, IATF 16949:2016 |
✓ Genuine Kyocera Product
| Manufacturer | Kyocera Corporation |
|---|---|
| Status | Verified Original Product |
| Quality Assurance | Guaranteed Genuine Kyocera Components |
発送・在庫情報
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Stock Enquiries (在庫確認):
Contact our logistics team at sales.kyotow@gmail.com for real-time inventory status and dispatch location information. -
In-Stock Items (在庫あり):
Normally dispatched within 3 business days from the nearest regional warehouse. -
Factory Procurement (取寄せ):
Manufacturing and dispatch typically require 4–5 weeks. Once production begins, cancellations cannot be accommodated. -
Authenticity Guarantee (本物保証):
All products sold by Kyotow are 100% genuine and sourced through authorized Japanese and international distribution channels.
正確な製品情報
Following the Japanese philosophy of Monozukuri (物の作り), we strive to maintain exceptional technical accuracy throughout our product catalog.
- Confirm dimensions, geometry, coating, and grade using the official Kyocera item code.
- Technical datasheets are available upon request.
- For technical clarification contact sales.kyotow@gmail.com.
返品・キャンセルポリシー
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100% Accuracy Guarantee:
Full refund or replacement will be provided if the verified Kyocera item received differs from the official item code specified in your order confirmation. -
Order Finality:
Due to automated procurement systems connected directly to global factory distribution channels, orders cannot be modified or cancelled once processing has commenced. -
Technical Assistance:
Please verify machine compatibility, insert geometry, coating, and application grade before placing your order.
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Need Technical Assistance?
Contact our industrial tooling specialists for application support, tooling recommendations, datasheets, and compatibility verification.
sales.kyotow@gmail.comDirect Supply Chain Transparency サプライチェーンの透明性
Why are our prices so low? (価格が安い理由): Kyotow sources genuine Kyocera tools directly from domestic Japanese distribution networks, completely bypassing the steep regional markups, localized sales overhead, and heavy middleman margins of Western distributors. We pass 100% of those structural savings directly to your machine shop.
Kyotowは日本の国内流通ネットワークから京セラ正規品を直接仕入れることで、欧米の現地代理店による大幅な上乗せ価格や営業コスト、中間マージンを完全に排除しています。その構造的メリットを、お客様の加工現場へ100%還元いたします。
Domestic Sourced
Procured straight from Japan's local wholesale networks to capture maximum market arbitrage.
100% Genuine
Zero counterfeit risk. All items are brand-new, authentic factory-sealed Japanese stock.
No Regional Markups
We bypass Western corporate sales teams and localized regional overhead costs entirely.
