Kyocera Z4T PR1225 CEM03709 ENDMILL - Precision Mold Milling
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- Stock: In Stock
- Model: ENDMILL
- Weight: 0.10kg
- Manufactured: In Japan
- Ships: Worldwide
- Item Code: CEM03709
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Product Overview
The Z4T CEM03709 is a premium-grade solid carbide 4-flute corner radius endmill engineered by Kyocera for demanding precision CNC machining environments. Featuring a PVD TiAlN coating on an fine carbide substrate, this tool delivers exceptional wear resistance and thermal stability. The precision-ground corner radius of R0.02mm ensures accurate fillet generation and superior surface finish. Designed for precision mold and die machining with 20mm long-neck reach for deep cavity profiling, corner radiusing, and vertical wall finishing, it guarantees mirror-finish surface quality and extended tool life even under aggressive cutting conditions.
ISO Designation Breakdown
| ISO Symbol | Parameter | Value |
| E | Tool Category | Endmill (Solid Carbide) |
| 04 | Nominal Diameter | 4 mm |
| 0050 | Effective Cutting Length | 5.0 mm |
| L20 | Neck Configuration | Long Neck 20mm |
| R002 | Corner Radius | R0.02 mm |
| 4S | Flute Count & Style | 4 Flutes, Corner Radius |
Engineering Dimensions & Geometry
| Parameter | Specification | Tolerance |
| Cutting Diameter (D1) | 4 mm | h6 (-0.000 to -0.009 mm) |
| Flute Length (L2) | 5.0 mm | +0.3 / -0.0 mm |
| Overall Length (L1) | 40.0 mm | +0.5 / -0.0 mm |
| Shank Diameter (D2) | 4 mm | h6 |
| Corner Radius | R0.02 mm | ±0.005 mm |
| Helix Angle | 35° | ±1.0° |
| Core Diameter | 2.48 mm | ±0.03 mm |
| Neck Diameter | 3.40 mm | h7 |
| Neck Length | 20 mm | +0.5 / -0.0 mm |
Grade Details - Key Grade Characteristics
PR1225 is a PVD TiAlN-coated grade built on fine carbide substrate technology, specifically selected for the Z4T series to maximize performance in precision corner radius milling applications.
| Property | Value | Performance Impact |
| Hardness | 92.0 HRA | Superior wear resistance in continuous and intermittent cutting |
| Coating Color | Dark Bronze | Visual wear indicator for precise tool change planning |
| Max Operating Temp | 750°C | Stable performance in dry and high-speed machining |
| Transverse Rupture Strength | 3,400 MPa | High edge stability under corner radius stress concentration |
| Coating Thickness | 2.5-4.0 μm | Optimal balance of toughness and heat insulation for small-radius edges |
Grade Comparison Matrix
| Grade | Coating | Hardness | Best For | Speed vs Life |
| PR1225 | PVD TiAlN | 92.0 HRA | Steel, Alloy Steel | Balanced |
| PR1225 | PVD TiAlN | 92.0 HRA | Light finishing, high speed corner radiusing | Speed ++ |
| CA6535 | CVD TiCN+Al₂O₃ | 91.5 HRA | Heavy roughing, cast iron mold bases | Life ++ |
| PR1705 | PVD DLC | 93.0 HRA | Hardened steel mold cavities >50 HRC | Precision ++ |
Chipbreaker Profile
The Z4T series features a precision-ground chipbreaker geometry optimized for 4-flute corner radius operation. The rake face is polished to Ra 0.15 μm to minimize built-up edge and ensure smooth chip evacuation. The flute gullet volume is designed for 4 mm diameter with a core thickness ratio of 0.62, providing maximum rigidity while maintaining adequate chip pocket space. The corner radius transition is ground with a tangential blend radius of R0.040mm to eliminate stress concentration points.
| Geometry Parameter | Value | Function |
| Rake Angle (γ) | 8° | Reduces cutting force, improves surface finish on corner radius |
| Relief Angle (α) | 12° | Prevents rubbing, reduces flank wear on radius edge |
| Helix Angle | 35° | Ensures gradual engagement, reduces chatter in corner radiusing |
| Gullet Radius | 0.88 mm | Optimizes chip curling and evacuation from corner radius zone |
| Corner Radius Tolerance | ±0.005 mm | Ensures accurate fillet dimensions in mold cavities |
Recommended Applications & Workpiece Materials
This tool is optimized for the following material groups and machining scenarios:
- Primary Materials: Steel, Alloy Steel
- Secondary Materials: Tool steel, Mild steel, Free-cutting steel, Brass, Bronze
- Hardness Range: Up to 35 HRC
- Ideal Operations: Precision mold and die machining with 20mm long-neck reach for deep cavity profiling, corner radiusing, and vertical wall finishing
- Surface Finish Capability: Ra 0.4-0.8 μm achievable with optimized parameters
Application Map by Operation
| Operation | Suitability | Recommended Ae | Notes |
| Slotting | ★★★☆☆ | 0.4 × D1 | Corner radius reduces stress at slot bottom; reduce Ap by 30% |
| Profiling | ★★★★★ | 0.3-0.8 × D1 | Excellent wall and corner finish quality; primary application |
| Ramping | ★★★★☆ | 0.2 × D1 | Max ramp angle 3° recommended; corner radius aids entry |
| Plunging | ★★☆☆☆ | 0.1 × D1 | Not center-cutting; use helical entry with radius lead-in |
| Corner Radiusing | ★★★★★ | 0.05-0.15 × D1 | Primary design intent; produces accurate internal fillets |
| 3D Contouring | ★★★★☆ | 0.05-0.15 × D1 | Long neck enables deep cavity contouring |
Recommended Cutting Conditions
| Material | Vc (m/min) | Fz (mm/tooth) | Ap (mm) | Ae (mm) |
| Carbon Steel (S45C) | 80 | 0.08 | 3.2 | 1.6 |
| Stainless Steel (SUS304) | 60 | 0.06 | 2.4 | 1.0 |
| Cast Iron (FC250) | 80 | 0.10 | 4.8 | 2.4 |
| Hardened Steel (50HRC) | 30 | 0.03 | 0.6 | 0.3 |
Values are starting recommendations. Adjust based on machine rigidity, coolant delivery, and workpiece fixturing. Reduce speeds by 20% for neck lengths exceeding 3×D1.
Operating Guidelines
- Runout Tolerance: Keep tool runout below 0.005 mm at the cutting edge to prevent uneven wear on the corner radius and chatter.
- Coolant: Use water-soluble coolant at 6-8% concentration for steel and cast iron. For aluminum with TBK grades, use air blast or mist to prevent built-up edge on the radius edge.
- Entry Strategy: Use helical or ramp entry at 1.5°-3° angle. Avoid direct plunging. For corner radiusing operations, use a radius lead-in path to engage the corner gradually.
- Depth of Cut: Do not exceed 1.5×D1 in profiling to prevent deflection and radius distortion. For slotting, limit to 0.8×D1.
- Speed Ramp: Start at 70% of recommended Vc for the first 10 minutes, then increase to 100% once wear pattern stabilizes on the radius edge.
- Tool Change: Monitor flank wear (VB) and corner radius wear. Replace when VB exceeds 0.10 mm or radius wear exceeds 0.005 mm for precision work.
- Vibration Control: For neck lengths >3×D1, reduce spindle speed by 15% and increase feed per tooth by 10% to avoid harmonic vibration.
Toolholder Compatibility
For optimal performance and safety, pair this corner radius endmill with the following holder systems:
| Holder Type | Taper / Interface | Collet Size | Runout |
| ER Spring Collet Chuck | BT30 / BT40 / BT50 | ER16 | ≤ 0.010 mm |
| Hydraulic Expansion Holder | HSK-A63 / HSK-A100 | 4 mm | ≤ 0.005 mm |
| Shrink Fit Holder | HSK-E50 / HSK-A63 | 4 mm | ≤ 0.003 mm |
| Milling Chuck | BT40 / BT50 | 4 mm | ≤ 0.008 mm |
Packaging & Ordering Information
- Unit Packaging: Individual plastic tube with anti-rust oil and protective cap, 10 pcs per master carton, barcode labeled
- Minimum Order: 1 piece (no MOQ for standard stock items)
- Lead Time: In-stock items ship within 24-48 hours. Non-stock: 4-6 weeks ex-factory Japan.
- Storage: Store in original packaging at 15-25°C, humidity <60% RH. Avoid direct sunlight and vibration.
- Inspection Certificate: Available upon request (ISO 9001 traceability, dimensional report including corner radius verification, coating batch).
Catalog Meta Data
| Attribute | Value |
| Kyocera Catalog Page | 2026 General Catalog, Section 3.4, Page 231 |
| Batch / Serial Number | KY-2026-14982 |
| Manufacturing Origin | Japan |
| Quality Standard | ISO 9001:2015, JIS B 4054 |
| ECCN / Export Code | EAR99, 1A999.a |
| Harmonized Code | 8207.70.60 |
| Warranty | 12 months from date of purchase against manufacturing defects |
✓ Genuine Kyocera Product
| Manufacturer | Kyocera Corporation |
|---|---|
| Status | Verified Original Product |
| Quality Assurance | Guaranteed Genuine Kyocera Components |
発送・在庫情報
We ship worldwide through our strategic global logistics network. Products are dispatched directly from our international distribution facilities to ensure efficient delivery and customs clearance.
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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.
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We bypass Western corporate sales teams and localized regional overhead costs entirely.
