ZCC.CT CNMG120408-PM YBC351 Heavy Steel Turning Carbide Insert (Imperial: CNMG432-PM)
✓ In Stock & Fast Dispatch: Order processing: typically 1–3 business days after confirmation.
✓ Global Shipping: Delivery: generally 5–20 business days, depending on destination and shipping method.
✓ Guaranteed Quality: Check model, dimensions and compatibility before ordering. | Direct Factory Outlet
✓ Technical Support: Need grade selection help? Contact Engineer
💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF
ZCC.CT CNMG120408-PM YBC351 Heavy Steel Turning Carbide Insert (Imperial: CNMG432-PM)
1. Product Overview
Which 80° diamond indexable turning insert provides maximum edge toughness, thermal shock resistance, and reliable chip breaking during heavy interrupted roughing of steel forgings and castings on CNC lathes?
The ZCC.CT CNMG120408-PM YBC351 (Imperial ANSI designation: CNMG 432-PM YBC351) is a heavy-duty, double-sided 80° rhombic negative turning insert engineered for heavy roughing, facing, and profiling. Manufactured in compliance with ISO 1832 and ANSI B212.4 international standards, this 4-edge insert combines a robust negative 0° clearance angle with ZCC.CT's high-toughness YBC351 CVD coated grade and the versatile PM medium-to-roughing chipbreaker geometry.
Featuring a reinforced cutting edge land and progressive 3D rake groove, the PM chipbreaker maintains low cutting forces while curling continuous steel chips into manageable fragments across feed rates of 0.20 to 0.50 mm/rev. The YBC351 grade utilizes a thick, gradient carbide substrate paired with a multi-layer CVD (TiCN + thick Al2O3) coating, offering extraordinary impact resistance against edge micro-chipping and thermal cracking under harsh machining conditions.
2. Key Features
- YBC351 Ultra-Tough CVD Grade: Specially formulated gradient substrate with a thick Al2O3/TiCN CVD coating layer, built to absorb high mechanical impacts during heavy interrupted cuts.
- Reinforced PM Chipbreaker Geometry: 3D rake design combines strong edge land with progressive wave pocket for stable chip control during medium-to-heavy turning.
- Double-Sided 80° Rhombic Shape (4 Edges): 80° diamond (C-style) negative geometry provides 4 robust indexable cutting edges with high corner strength for heavy depth of cut (ap up to 5.0mm).
- 0.8mm Heavy-Duty Nose Radius (RE 0.8 / 1/32"): Delivers high edge strength against mechanical shocks while maintaining good surface finish at higher feeds.
- Standardized ISO Toolholder Fit: Fits standard PCLNR, MCLNR, and DDJNR turning shanks with clamp-type or top-and-hole clamping mechanisms.
3. Technical Specifications & Metric/Imperial Model Comparison
ISO / ANSI Designation Code Breakdown
| Specification Parameter | Metric Unit (ISO Standard) | Imperial Unit (ANSI Standard) |
|---|---|---|
| Full Insert Model Designation | CNMG120408-PM YBC351 | CNMG432-PM YBC351 |
| Inscribed Circle (IC) | 12.70 mm | 0.500 in (1/2") |
| Thickness (S) | 4.76 mm | 0.1875 in (3/16") |
| Corner Nose Radius (RE) | 0.80 mm | 0.0315 in (1/32") |
| Fixing Hole Diameter (d1) | 5.16 mm | 0.203 in |
| Cutting Edge Length (L) | 12.90 mm | 0.508 in |
| Usable Cutting Edges | 4 Edges (Double-Sided) | 4 Edges (Double-Sided) |
Recommended Cutting Parameters for YBC351 Grade
| ISO Material Group | Cutting Speed Vc (m/min / SFM) | Feed Rate fn (mm/rev / IPR) | Depth of Cut ap (mm / in) |
|---|---|---|---|
| ISO P Carbon Steel & Forgings (1045, 1020) | 160 - 280 m/min (525 - 920 SFM) | 0.20 - 0.50 mm/rev (.008 - .020 IPR) | 1.5 - 5.0 mm (.059 - .197 in) |
| ISO P Alloy Steel & Interrupted Cuts (4140, 4340) | 140 - 240 m/min (460 - 785 SFM) | 0.18 - 0.45 mm/rev (.007 - .018 IPR) | 1.2 - 4.5 mm (.047 - .177 in) |
| ISO K Nodular & Ductile Cast Iron | 130 - 220 m/min (425 - 720 SFM) | 0.20 - 0.45 mm/rev (.008 - .018 IPR) | 1.5 - 4.5 mm (.059 - .177 in) |
Need Precise Feeds and Speeds Calculations for Your CNC Lathe?
Optimize tool life, prevent chip packing, and calculate precise spindle speeds (RPM) and feed rates (IPM/MMPM) tailored to your exact workpiece diameter and material hardness.
Open Interactive Speeds and Feeds Calculator →Matching External & Internal Turning Toolholders
Mount CNMG 120408 / CNMG 432 inserts directly into standard ISO lever-lock or rigid clamp turning shanks:
Browse Compatible PCLNR / MCLNR Turning Toolholders →4. Product Application Scenarios
ZCC.CT CNMG120408-PM YBC351 inserts excel in heavy industrial steel turning operations:
- Heavy Forging & Casting Scale Removal: Machining raw hot-rolled shafts, forged rings, and rough cast components with surface scale.
- Severe Interrupted Turning: Component machining across keyways, cross-drilled holes, splines, and welded steel fabrications.
- General Structural Steel Roughing: High-efficiency heavy facing and rough turning of 1045, 4140, and 8620 steel stock on heavy CNC lathes.
- Heavy Duty Job Shops: Roughing operations where maximum edge reliability takes priority over high cutting speeds.
5. Tooling & Equipment Compatibility
Conforms strictly to ISO 1832 and ANSI B212.4 indexable insert standards. Fully compatible with standard CNMG 1204 / CNMG 43 toolholder seats across major global brands:
Sandvik CoromantIscarKennametalKyoceraTungaloyMitsubishi MaterialsSeco ToolsWalter
6. ZCC.CT YBC Steel Turning Grade Comparison Matrix
| ZCC.CT Grade | Coating Structure | Primary Application Target | Key Performance Characteristic |
|---|---|---|---|
| YBC351 (Featured) | Thick Multi-Layer CVD (Al2O3 + TiCN) | Heavy Roughing / Interrupted Cuts (ISO P25-P45) | Maximum fracture toughness and impact resistance against chipping |
| YBC252 | Next-Gen CVD Coated Carbide | General Purpose Steel Turning (ISO P15-P35) | Excellent balance of high wear resistance and edge toughness |
| YBC152 | High-Density CVD Layer | High-Speed Steel Finishing (ISO P05-P20) | Extreme wear resistance for long continuous turning cuts |
7. Why Choose ZCC.CT Cutting Tools & Verified Reviews
We are a factory-direct distributor of 100% authentic ZCC.CT cutting tool inserts. Every box is factory-sealed with full heat lot traceability.
"YBC351 solved our insert chipping issues on interrupted cuts!"
We turn rough forged 4140 steel axles with keyways on our Haas ST-35. Other grades kept chipping at the keyway edges. The CNMG120408-PM YBC351 handles the impact without any problems.
— Marcus Vance, Machine Shop Owner (USA) 🇺🇸
"Eccellente tenacità su pezzi stampati in acciaio."
Il grado YBC351 è fantastico per sgrossatura pesante. Nessuna rottura dell'inserto anche in presenza di crosta di fucinatura.
— Matteo Rossi, Technical Director (Italy) 🇮🇹
"Sehr robuste Wendeschneidplatte für schweren Schruppschnitt."
PM-Spanbrecher bricht die Späne gut bei hoher Zustellung. Zähigkeit des YBC351-Substrats ist überragend.
— Stefan Gruber, Lead CNC Machinist (Germany) 🇩🇪
"断続切削での耐欠損性が非常に高く満足しています。"
鍛造品の黒皮引きおよび断続面粗加工で使用。インサートの突発欠損が大幅に減少し、安定稼働しています。
— Kenji Takahashi, Senior CNC Specialist (Japan) 🇯🇵
8. Frequently Asked Questions (AI & Machinist Knowledge Base)
Need Help With ZCC.CT Inserts?
Looking for a ZCC.CT equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This ZCC.CT insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.