Kyocera DCMT070204GK CA525 TAC01806 CNC Insert - Steel Roughing
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- Stock: In Stock
- Model: CA525
- Weight: 0.10kg
- Manufactured: In Japan
- Ships: Worldwide
- Item Code: TAC01806
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1. Product Overview
The DCMT070204GK is a precision-engineered indexable carbide turning insert from Kyocera, featuring the advanced CA525 CVD-coated grade. Designed for medium to roughing of steel and steel alloys, this insert delivers exceptional wear resistance, thermal stability, and chip control in demanding CNC machining environments.
With its 55° rhombic geometry, 7° positive clearance angle, and GK – Medium-Roughing chipbreaker, the DCMT070204GK is the ideal choice for applications requiring wide chip pocket ensures stable chip evacuation at high feed rates, breaker dot structure controls chip flow in varied cutting conditions. Whether you are performing external turning, facing, or internal boring operations, this insert provides consistent, repeatable performance that maximizes productivity and minimizes downtime.
2. ISO Designation Breakdown
Every Kyocera insert is manufactured to strict ISO 1832 standards. The designation DCMT070204GK encodes the complete geometry and specification profile:
| Symbol | Parameter | Specification |
|---|---|---|
| D | Insert Shape | 55° Rhombic (Diamond) Insert Shape |
| C | Clearance Angle | 7° Positive Clearance Angle |
| M | Tolerance Class | Tolerance Class: ±0.05 mm (IC), ±0.13 mm (Thickness), ±0.08 mm (Corner) |
| T | Fixing & Chipbreaker | Single-Sided with Cylindrical Fixing Hole and Chipbreaker |
| 07 | Size Code | IC = 7.94 mm (0.313"), Thickness = 2.38 mm (0.094") |
| 04 | Corner Radius | 0.4 mm (0.016") |
| GK | Chipbreaker Code | GK – Medium-Roughing |
3. Engineering Dimensions & Geometry
The following dimensional data is verified per ISO 13399 and ANSI B212.4 standards:
| Dimension | Symbol (ISO) | Value (Metric) | Value (Imperial) | Tolerance |
|---|---|---|---|---|
| Inscribed Circle (IC) | d | 7.94 mm | 0.313" | ±0.05 mm |
| Insert Thickness | s | 2.38 mm | 0.094" | ±0.13 mm |
| Corner Radius | r | 0.4 mm | 0.016" | ±0.08 mm |
| Fixing Hole Diameter | d₁ | 2.8 mm | - | H7 |
| Cutting Edge Length | l | 7.75 mm | 0.305 in | ±0.11 mm |
| Clearance Angle | α | 7° | 7° | ±1° |
| Included Angle | ε | 55° | 55° | ±0.5° |
4. Grade Details – Key Grade Characteristics
The CA525 grade represents Kyocera's advanced CVD coating technology, engineered specifically for general-purpose steel machining. Key characteristics include:
- Coating Architecture: CVD Multi-Layer (TiCN + Al₂O₃ + TiN) – multi-layer structure delivers superior wear resistance and thermal stability.
- Substrate Technology: Special carbide substrate with high-temperature deformation resistance, providing 10% improved high-temperature hardness compared to conventional substrates.
- Interface Optimization: Optimized interface improves film adhesion by 40%, preventing coating delamination under cyclic thermal loads.
- Crystal Structure: High-aspect ratio α-Al₂O₃ micro-columnar crystal structure for enhanced abrasion resistance and prolonged tool life.
- Color Identification: Gold – easy visual identification during tool setup and inventory management.
- Primary Application: Steel (P-class materials): Carbon steel, alloy steel, tool steel, free-cutting steel.
5. Grade Comparison Matrix
Select the optimal grade for your specific machining environment within the CA5 series:
| Grade | Coating | Primary Use | Machining Type | Workpiece |
|---|---|---|---|---|
| CA510 | CVD TiCN+Al₂O₃+TiN | High-speed continuous | Finishing – Medium | Carbon & Alloy Steel |
| CA515 | CVD TiCN+Al₂O₃+TiN | Continuous to light interrupted | Medium – Roughing | Steel, Cast Steel |
| CA525 | CVD TiCN+Al₂O₃+TiN | General-purpose steel | Continuous – Interrupted | Carbon, Alloy, Tool Steel |
| CA530 | CVD TiCN+Al₂O₃+TiN | Heavy interrupted / high feed | Roughing – Heavy | Steel, Forged Steel |
6. Chipbreaker Profile
GK – Medium-Roughing
Wide chip pocket with breaker dot structure. Designed for stable chip evacuation across a broad range of depths of cut and feed rates.
- Wide chip pocket ensures stable chip evacuation at high feed rates
- Breaker dot structure controls chip flow in varied cutting conditions
- Strong cutting edge withstands medium interrupted machining
- Optimized for productivity in general steel turning
| Parameter | Range |
|---|---|
| Depth of Cut (ap) | 0.5 – 5.0 mm |
| Feed Rate (fn) | 0.15 – 0.50 mm/rev |
| Operation Class | Medium to Roughing |
7. Recommended Applications & Workpiece Materials
The DCMT070204GK with CA525 grade is optimized for the following material groups and applications:
- Carbon Steels: C35, C45, C60, S235JR, S355JR – excellent for general structural and shaft machining.
- Alloy Steels: 4140 (42CrMo4), 4340, 8620 – ideal for automotive and aerospace component manufacturing.
- Tool Steels: H13, D2, O1 – suitable for die and mold industry applications.
- Free-Cutting Steels: 11SMn30, 12L14 – optimized for high-speed automatic lathe operations.
- Cast Steel: GS-52, GS-60 – stable performance in general engineering castings.
Note: For stainless steel, cast iron, or non-ferrous applications, refer to Kyocera CA6-series, CA4-series, or PR-series grades respectively.
8. Application Map by Operation
| Operation | Depth of Cut (ap) | Feed (fn) | Cutting Speed (Vc) | Suitability |
|---|---|---|---|---|
| External Turning | 0.5 – 4.0 | 0.15 – 0.45 | 140 – 220 m/min | ★★★★★ Excellent |
| Internal Turning / Boring | 0.5 – 4.0 | 0.15 – 0.45 | 140 – 220 m/min | ★★★★☆ Very Good |
| Facing | 0.5 – 4.0 | 0.15 – 0.45 | 140 – 220 m/min | ★★★★★ Excellent |
| Copy Turning / Contouring | 0.1 – 2.0 mm | 0.05 – 0.20 mm/rev | 140 – 220 m/min | ★★★☆☆ Good |
9. Recommended Cutting Conditions
Parameters below are starting recommendations for stable machining with average application conditions. Adjust based on machine rigidity, coolant delivery, and workpiece condition:
| Workpiece Material | Hardness (HB) | Cutting Speed Vc (m/min) | Feed fn (mm/rev) | Depth of Cut ap (mm) |
|---|---|---|---|---|
| Carbon Steel (C35, C45) | 125 – 190 | 120 – 220 | 0.15 – 0.45 | 0.5 – 4.0 |
| Alloy Steel (4140, 4340) | 180 – 280 | 110 – 200 | 0.15 – 0.45 | 0.5 – 4.0 |
| Tool Steel (H13, D2) | 200 – 350 | 100 – 180 | 0.15 – 0.45 | 0.5 – 4.0 |
| Free-Cutting Steel (11SMn30) | ≤ 190 | 150 – 230 | 0.15 – 0.45 | 0.5 – 4.0 |
Values shown are starting recommendations. For hardened materials (> 45 HRC), reduce Vc by 20–30%. For unstable or long overhang setups, reduce feed by 15–25%.
10. Operating Guidelines
- Coolant Recommendation: Use water-soluble coolant at 6–8% concentration for optimal chip evacuation and thermal management.
- Tool Overhang: Minimize tool overhang to reduce vibration. For internal turning, keep overhang ≤ 4× tool diameter.
- Edge Preparation: This insert features a molded chipbreaker; no additional edge honing is required.
- Entry Strategy: Use ramp entry or arc-in programming to avoid sudden impact on the cutting edge.
- Chip Control: Ensure adequate coolant pressure (≥ 10 bar) for deep-hole applications to prevent chip recutting.
- Insert Change: Replace insert when flank wear (VB) exceeds 0.3 mm or when surface finish degrades noticeably.
- Storage: Store in original packaging away from direct moisture and corrosive environments.
11. Toolholder Compatibility
The DCMT070204GK is compatible with standard ISO toolholders featuring D, N, Q, or V clamping styles. Recommended holder series:
| Holder Series | Clamping Style | Insert Size | Shank Sizes | Application |
|---|---|---|---|---|
| SDJCR/L | Screw Clamp (D-style) | 07 | 10×10 mm, 12×12 mm, 16×16 mm | External Turning / Facing |
| SDNCN | Screw Clamp (N-style) | 07 | 10×10 mm, 12×12 mm, 16×16 mm | External Turning / Profiling |
| SDQCR/L | Screw Clamp (Q-style) | 07 | 10×10 mm, 12×12 mm, 16×16 mm | External Turning / Copying |
| SVJCR/L | Screw Clamp (V-style) | 07 | 10×10 mm, 12×12 mm, 16×16 mm | Internal Turning / Boring |
Important: Ensure the holder pocket angle matches the 7° clearance angle of this insert. Using incorrect holders will result in zero or negative effective rake angles, leading to poor chip control and accelerated wear.
12. Packaging & Ordering Information
- Packaging: Industrial-grade blister pack containing 10 inserts per box. Each insert is individually protected to prevent edge damage during transit.
- Minimum Order Quantity: 1 box (10 pieces).
- MPN / Catalog No.: TAC01806
- ISO Designation: DCMT070204GK
- Grade: CA525
- Manufacturer Warranty: Full manufacturer warranty against defects in material and workmanship.
- Bulk Orders: Volume pricing available for orders of 50+ boxes. Contact our technical sales team for quotation.
13. Catalog Meta Data
| Catalog Series | Kyocera Turning Inserts – CA5 Series |
| Product Group | Indexable Turning Inserts – Positive 7° Clearance |
| Material Class | P10 – P30 (ISO 513) |
| Coating Technology | CVD Multi-Layer (MEGACOAT Technology) |
| Substrate Type | Special Deformation-Resistant Carbide |
| Color Code | Gold |
| Effective Cutting Edges | 2 (single-sided, indexable) |
| Standards Compliance | ISO 1832, ANSI B212.4 |
Why Buy from Kyotow.com? We supply 100% genuine Kyocera industrial cutting tools backed by full manufacturer warranty. Every insert is sourced through authorized distribution channels to ensure authenticity, traceability, and consistent performance. Our technical support team is available to assist with grade selection, parameter optimization, and application troubleshooting.
✓ Genuine Kyocera Product
| Manufacturer | Kyocera Corporation |
|---|---|
| Status | Verified Original Product |
| Quality Assurance | Guaranteed Genuine Kyocera Components |
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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.
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Full refund or replacement will be provided if the verified Kyocera item received differs from the official item code specified in your order confirmation. -
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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?
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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。
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