Kyocera Z4T PR1535 CEM04008 ENDMILL - Corner Radius Milling

1. Product Overview

The Kyocera Z4T solid carbide corner radius endmill (MPN: CEM04008) is engineered for high-precision micro-milling operations. Featuring a 3mm cutting diameter with a 0.30mm corner radius, this 4-flute tool delivers exceptional surface finish and dimensional accuracy. The PR1535 grade substrate with nano-layered PVD coating ensures extended tool life even under aggressive cutting conditions. Ideal for aerospace, medical device, and precision mold manufacturing.

2. ISO Designation Breakdown

The product code follows Kyocera's standard nomenclature for solid carbide endmills:

3. Engineering Dimensions & Geometry

All dimensions verified per Kyocera QC standards. Tolerances conform to ISO 13399 tool data exchange specifications:

Note: Core diameter is approximate and varies slightly by production batch to optimize rigidity.

4. Grade Details — Key Grade Characteristics

Grade PR1535 is a ultra-fine grain carbide substrate (0.4 μm grain size) with a nano-layered TiAlN PVD coating. Key characteristics include:

• Substrate Hardness: HRA 92.5 — provides excellent wear resistance and edge stability
• Coating Composition: Multi-layer TiAlN (≈3.5 μm total thickness) with optimized aluminum content for high-temperature oxidation resistance
• Coating Hardness: HV 3200 — reduces built-up edge and extends tool life in steel applications
• Thermal Stability: Effective up to 900°C (oxidation threshold), suitable for dry and MQL machining
• Surface Finish: Mirror-polished rake and flank surfaces (Ra ≤ 0.05 μm) minimize friction and improve chip evacuation
• Edge Preparation: Micro-honed cutting edge (T-land 0.02mm × 20°) enhances edge strength without compromising sharpness

5. Grade Comparison Matrix

Select the optimal grade for your specific workpiece material and machining strategy:

6. Chipbreaker Profile

While solid carbide endmills do not feature indexable insert chipbreakers, the Z4T series incorporates advanced flute geometry designed for optimal chip control:

• Flute Profile: Parabolic core design with variable core thickness for maximum rigidity
• Helix Angle: 35° — balances cutting force distribution and axial lift for smooth chip evacuation
• Rake Angle: 8° positive rake on peripheral cutting edges; 5° on corner radius transition
• Clearance Angle: 10° primary clearance + 15° secondary clearance for reduced flank wear
• Corner Radius Geometry: Tangential blend from peripheral edge to corner radius ensures smooth surface generation and eliminates chatter marks
• Chip Splitting: Slightly irregular flute spacing (89°, 91°, 89°, 91°) disrupts harmonic vibration

7. Recommended Applications & Workpiece Materials

The Z4T PR1535 is optimized for the following material groups:

• Carbon & Alloy Steels (P-group): Up to 45 HRC — excellent performance in 1045, 4140, 4340
• Tool & Die Steels (P-group): 45-55 HRC — use reduced speeds for optimal life
• Stainless Steels (M-group): 304, 316, 17-4PH — coating resists work-hardening adhesion
• Cast Irons (K-group): Gray and nodular cast iron — stable performance at medium speeds
• Aluminum Alloys (N-group): 6061-T6, 7075-T6 — polished flutes prevent material buildup
• Titanium Alloys (S-group): Ti-6Al-4V — suitable for finishing passes; avoid heavy roughing

8. Application Map by Operation

Suitability ratings for common milling operations (1-5 star scale):

9. Recommended Cutting Conditions

Parameters below represent starting values for stable machining centers. Adjust based on machine rigidity, workpiece clamping, and coolant delivery:

Recommended coolant: Water-soluble emulsion (5-8% concentration) or neat oil for stainless steel. For aluminum, use air blast or MQL to prevent thermal shock.

10. Operating Guidelines

• Spindle Runout: Maintain ≤ 0.005mm TIR at the tool tip for optimal surface finish and tool life
• Tool Overhang: Minimize overhang; use 60mm as maximum reference. For every 1×D increase in overhang, reduce feed rate by 15%
• Run-in Procedure: For first 5 minutes of operation, run at 70% of recommended Vc and fz to stabilize cutting edge
• Coolant Pressure: Minimum 20 bar (290 psi) for through-spindle coolant; ensure nozzle targets flute gullet
• Chip Management: Use compressed air or chip conveyor to prevent recutting, especially in pocketing operations
• Tool Inspection: Check corner radius wear every 30 minutes of cutting time; replace when wear land exceeds 0.05mm
• Storage: Store in original packaging at 15-25°C, humidity <60% RH to prevent coating degradation

11. Toolholder Compatibility

12. Packaging & Ordering Information

• Packaging: Individual plastic tube with protective foam insert (prevents edge damage during transit)
• Labeling: Each tube marked with MPN, grade, diameter, and batch number for full traceability
• Minimum Order: 1 piece (no MOQ for standard items)
• Lead Time: Standard items ship within 24-48 hours; non-stock items 2-4 weeks
• Storage Temperature: -10°C to +40°C during transport
• HS Code: 8207.70.00 (Interchangeable tools for milling)

13. Catalog Meta Data

All technical data is provided for reference purposes. Actual performance depends on machine condition, workpiece material, and cutting parameters. Kyocera recommends conducting test cuts to optimize conditions for your specific application. For application engineering support, contact Kyotow.com technical services.