ZCC.CT MPHT060304-DM YBC302 Carbide Milling Inserts (MPHT 21.51 DM Chipbreaker)
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ZCC.CT MPHT060304-DM YBC302 Carbide Milling Inserts (MPHT 21.51 DM Chipbreaker)
Heavy-Duty 90° Square Shoulder Milling Inserts | ISO MPHT060304 (ANSI MPHT 21.51) | YBC302 CVD Coated Grade for Medium-to-Heavy Steel Machining (ISO P15-P35)
1. Product Overview
Which milling insert grade and geometry offer the ideal balance of wear resistance and edge toughness for high-feed shoulder milling on alloy steel and mold steel?
The ZCC.CT MPHT060304-DM YBC302 is a premium industrial indexable carbide milling insert engineered for high-efficiency 90° shoulder milling, face milling, and slotting on steel workpieces (ISO P range). Built around the standardized ISO metric MPHT 060304 (ANSI MPHT 21.51) geometry, this insert incorporates the versatile -DM chipbreaker for optimized chip evacuation during medium-to-heavy roughing cuts. Featuring ZCC.CT's advanced YBC302 CVD thick-layer TiCN + Al2O3 coating deposited over an ultra-tough substrate, this insert maintains exceptional thermal crack resistance and edge integrity across variable depth-of-cut conditions on carbon steel, alloy steel, and cast steel.
ISO / ANSI Tool Designation Code Breakdown
(86° Parallelogram)
(11° Positive)
(Class H)
(With Hole/Countersink)
(6.8mm / 3.18mm / R0.4)
(Medium Roughing)
(CVD ISO P15-P35)
- M: Parallelogram insert profile (86° corner angle for efficient shoulder machining).
- P: 11° positive primary clearance angle reduces cutting forces and spindle load.
- H: High-precision manufacturing tolerances for insert indexing consistency.
- T: Countersunk mounting hole designed for secure screw-clamp cutter bodies.
- 060304 (ANSI 21.51): Length 6.8mm (0.268"), Thickness 3.18mm (1/8" / 0.125"), Corner Radius R0.4mm (1/64" / 0.016").
- DM: Dual-purpose general-to-medium milling chipbreaker optimized for balanced cutting forces and chip control.
- YBC302: Premium CVD gradient carbide grade with TiCN + Al2O3 coating for ISO P steel machining.
2. Key Features
- YBC302 CVD Coating Technology: Formulated with a thick Al2O3 layer and fine-grained TiCN matrix for maximum crater wear resistance and thermal shock barrier during wet or dry milling.
- Optimized DM Chipbreaker Geometry: Curved rake face design smoothly curls and breaks steel chips during shoulder and face milling, preventing chip re-cutting.
- Low Power Consumption: Positive 11° clearance geometry minimizes cutting friction, allowing high material removal rates (MRR) even on lower-horsepower CNC spindles.
- High Impact Toughness Substrate: Gradient carbide matrix resists plastic deformation and micro-chipping during interrupted cutting and milling through scale/forgings.
- Dual ISO / ANSI Standard Compliance: Fully drop-in compatible with standard EMP01 indexable shoulder end mills and face mill heads.
3. Technical Specifications & Recommended Parameters
Metric vs. Imperial Technical Specification Comparison
| Specification Parameter | Metric Units (ISO) | Imperial Units (ANSI) |
|---|---|---|
| Insert Designation | MPHT060304-DM YBC302 | MPHT 21.51-DM YBC302 |
| Cutting Edge Length (L) | 6.8 mm | 0.268 in |
| Inscribed Circle (IC) | 6.0 mm | 0.236 in |
| Insert Thickness (S) | 3.18 mm | 0.125 in (1/8") |
| Corner Radius (RE) | 0.4 mm | 0.016 in (1/64") |
| Clearance Angle / Coating | 11° / CVD TiCN + Al2O3 | 11° / CVD TiCN + Al2O3 |
Recommended Cutting Parameters for YBC302 Grade
| ISO Workpiece Material Group | Cutting Speed Vc (m/min) | Cutting Speed Vc (SFM) | Feed per Tooth fz (mm/z) | Depth of Cut ap (mm) |
|---|---|---|---|---|
| P10-P25 Carbon Steel (1045, 1018) | 180 - 280 m/min | 590 - 920 SFM | 0.08 - 0.20 mm/z | 1.0 - 5.0 mm |
| P20-P35 Alloy Steel (4140, 4340, 8620) | 140 - 230 m/min | 460 - 755 SFM | 0.08 - 0.18 mm/z | 1.0 - 4.5 mm |
| P30 Tool & Die Steel (P20, H13, D2 annealed) | 110 - 180 m/min | 360 - 590 SFM | 0.06 - 0.15 mm/z | 0.8 - 3.5 mm |
Pair MPHT060304-DM inserts with ZCC.CT EMP01 series 90° square shoulder indexable end mills and face mill cutter heads:
4. Product Applications
- 90° Square Shoulder Milling: Producing true 90-degree steps and shoulders on mold bases, machinery plates, and engine mounts.
- Plunge & Slot Milling: Machining keyways and deep cavities with effective chip evacuation in medium alloy steels.
- Face Milling & Profiling: General surface face milling and 3D contour roughing on mold/die components.
- Target Industries: Automotive component manufacturing, die & mold making, general machinery engineering, and oilfield equipment machining.
5. Tool & Machine Compatibility
ZCC.CT MPHT060304-DM inserts are compatible with standard industry 90° shoulder milling cutter bodies:
- Cutter Bodies: ZCC.CT EMP01 series indexable end mills (e.g., EMP01-016-G16-MP06-02, EMP01-020-W20-MP06-03).
- Mounting Screws: Torx M2.5 x 6mm locking screws.
- Machine Tool Equipment: Vertical machining centers (VMC), horizontal machining centers (HMC), CNC bed mills, and manual milling machines equipped with rigid arbors.
6. Material Grade Comparison
Evaluating ZCC.CT YBC302 against alternative ZCC.CT milling grades:
| Grade Name | Coating Method | Primary ISO Application | Performance Characteristics |
|---|---|---|---|
| YBC302 (Featured) | CVD TiCN + Al2O3 | ISO P15 - P35 Steel | Optimal balance of wear resistance and toughness for general steel milling |
| YBM251 | CVD Dual Coating | ISO M15 - M35 Stainless | High notch resistance and reduced built-up edge on stainless steel |
| YBG205 | PVD Nano-AlTiN | ISO P/M/S Universal | Ultra-fine grain for thin-wall milling and exotic temperature alloys |
7. Why Choose ZCC.CT Tools
- Original Factory Precision: 100% authentic ZCC.CT product with guaranteed dimensional stability across production batches.
- Cost-to-Performance Leadership: Delivers tool life comparable to tier-1 European brands at a significantly lower cost per cutting edge.
- Rigid Quality Inspection: Manufactured under ISO 9001 certified quality control, ensuring consistent surface finish and dimensional accuracy.
Verified Customer Reviews
"Switched to MPHT060304-DM YBC302 for running 4140 steel plates on our Haas VMC. Tool life increased by nearly 30% compared to our previous inserts."
— David M., CNC Machine Shop Owner (USA)"Sehr gute Standzeit bei C45 Stahl. Die DM-Geometrie bricht die Späne sauber. Sehr zufrieden mit der YBC302 Qualität."
— Stefan K., Formenbau Precision (Germany)"Ottimo rapporto qualità/prezzo per la fresatura di spallamenti retti. Usiamo questi inserti su frese EMP01 con eccellenti risultati."
— Marco B., Meccanica di Precisione (Italy)"金型鋼(P20)の荒加工で使用。チッピングなく安定して切削できています。コスパ最高です。"
— Kenji T., Die & Mold Works (Japan)"Consistent insert geometry and very sharp cutting edge. Great performance on medium alloy carbon steel."
— Andrew P., Subcontract Engineering (UK)8. AI & Engineering FAQ
Grade & Substrate Specifications
ZCC.CT YBC302 features a high-toughness WC carbide substrate combined with a multi-layer CVD TiCN + Al2O3 coating structure. Engineered for maximum thermal shock protection and resistance to flank wear during interrupted milling operations on ISO P materials.
Cross-Reference & Equivalent Insert Codes
Industry cross-references: MPHT 060304 / MPHT 21.51 | Equivalent grade matches: Sandvik GC4230 / GC4330, Iscar IC830 / IC808, Kennametal KCPM30, Korloy NC5330.
ISO Workpiece Application Matrix
P (Steel): Primary Target (Vc 140-280 m/min) | K (Cast Iron): Secondary Target (Vc 120-200 m/min) | M (Stainless Steel): Conditional | N (Non-Ferrous): Not Recommended | S (Exotics): Not Recommended
Troubleshooting Tips
- Thermal Cracking: Switch from wet coolant to dry milling with compressed air blast.
- Insert Edge Chipping: Reduce feed per tooth (fz) or select a cutter body with a denser tooth pitch to decrease shock load.
- Excessive Flank Wear: Reduce cutting speed (Vc) or step up to a harder milling grade (e.g., YBC152 / YBD152).
ZCC.CT indexable milling inserts are manufactured in compliance with ISO 1832 milling insert standardization norms and tested under ISO 9001 quality system certification guidelines.
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.