Kyocera VCMT080204HQ TN60 Cermet Turning Insert for Steel Finishing
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Kyocera VCMT080204HQ TN60 Indexable Cermet Turning Insert
Which turning insert is best for achieving a high-gloss, mirror surface finish on steel components during fine profiling?
The Kyocera VCMT080204HQ TN60 is the premier solution for high-speed precision steel finishing. This indexable insert features Kyocera's legendary TN60 un-coated cermet grade combined with the specialized HQ finishing chipbreaker. Unlike traditional carbide, this titanium-based cermet possesses an exceptionally low chemical affinity for ferrous metals. This property completely eliminates built-up edge (BUE) and crater wear, ensuring remarkable dimensional accuracy and ultra-smooth surface finishes on CNC lathes.
2. Product Core Advantages & Key Features
TN60 High-Performance Cermet Composition
Engineered from a titanium carbide (TiC) and titanium nitride (TiN) matrix, the TN60 grade offers superior oxidation resistance and high-temperature hardness compared to standard tungsten carbide tools. It excels at high cutting velocities, maintaining sharp edges without plastic deformation.
HQ Finishing Chipbreaker Geometry
The HQ molded chipbreaker features a highly optimized rake profile designed for low depths of cut. It delivers exceptional chip control on ductile and low-carbon steels, breaking continuous bird-nesting chips smoothly into short, manageable curls.
3. Technical Specifications & Conversions
ISO / ANSI Identification Nomenclature Breakdown
Every letter and number of the VCMT080204HQ TN60 profile represents a critical geometric and structural specification:
Dimensional Cross-Reference Matrix
| Specification Standard | Metric Identifier (ISO: VCMT080204HQ) | Imperial Identifier (ANSI Equivalent: VCMT 2.51.5 HQ) |
|---|---|---|
| Inscribed Circle (IC) | 6.35 mm | 0.250 inches (1/4") |
| Thickness (S) | 2.38 mm | 0.094 inches (3/32") |
| Corner Nose Radius (RE) | 0.40 mm | 0.016 inches (1/64") |
| Fixing Hole Diameter (D1) | 2.80 mm | 0.110 inches |
Recommended Mechanical Cutting Parameters
| Target Workpiece Material | Cutting Speed (Vc / SFM) Comparison | Feed Rate (fn / IPR) Recommendation |
|---|---|---|
| Carbon Steels (e.g., 1045, 4140 Annealed) | 120 - 350 m/min (390 - 1150 SFM) | 0.05 - 0.18 mm/rev (0.002 - 0.007 IPR) |
| Alloy Steels / Tool Steels (e.g., H13, D2 Soft) | 100 - 280 m/min (330 - 920 SFM) | 0.04 - 0.15 mm/rev (0.0016 - 0.006 IPR) |
| Low-Carbon Free Machining Steels (e.g., 12L14) | 150 - 400 m/min (490 - 1310 SFM) | 0.05 - 0.20 mm/rev (0.002 - 0.008 IPR) |
| Ductile Cast Iron (Nodular / Malleable) | 100 - 250 m/min (330 - 820 SFM) | 0.06 - 0.18 mm/rev (0.0024 - 0.007 IPR) |
4. Industrial Product Applications
The acute 35° profile of the VCMT insert shape combined with the TN60 cermet core makes this tool highly effective for complex, intricate geometries:
- Precision Automotive Shafts: High-speed finishing of transmission splines and complex outer diameters.
- Hydraulic Valves & Fittings: Achieving exceptionally low micro-inch roughness on tight-sealing steel surfaces.
- Intricate Profile Copying: Undercutting, back-turning, and relief-profiling with zero tool deflection.
5. Machinery & Tooling Compatibility
Guaranteed drop-in synchronization with global automated toolholding standards:
- Engineered for all standard metric and imperial SVJCR/L indexable side-lock turning holders.
- Highly suited for Swiss-type automated lathes and standard CNC live-turret operations.
- Compatible with positive 7° clearance internal boring bars designed for VCMT 2.51.5 insert configurations.
6. Kyocera Cutting Grade Comparison Matrix
| Kyocera Tooling Grade | Substrate Material Class | Primary Machining Target Area | Core Thermal / Mechanical Advantage |
|---|---|---|---|
| TN60 (Featured Grade) | Uncoated Advanced Cermet | Carbon/Alloy Steel Finishing | Exceptional anti-welding properties; delivers mirror finishes at high speeds. |
| PV720 | MEGACOAT NANO Coated Cermet | High-Speed Continuous Steel Turning | Hybrid design combining cermet surface finish with high PVD wear life. |
| PR930 | PVD Coated Tough Carbide | Stainless Steel / Low-Velocity Cuts | Excellent structural edge toughness; resists chipping during interrupted cuts. |
7. Why Source From Us & Verified Machinist Reviews
We stock completely authentic, original Kyocera factory-packaged inserts. Our technical distribution framework ensures dependable quality control, real-time stock statuses, and reliable delivery parameters to optimize your metalworking output.
"Outstanding gloss finish on carbon steel parts."
We run these on 1045 steel shafts. The TN60 cermet completely eliminates our built-up edge issues, and the surface finish looks identical to ground parts.
"Perfect chip control at shallow cuts."
The HQ chipbreaker profile is perfect for fine profiling runs. We get beautiful, short 6-shaped chips even at a 0.1mm depth of cut.
"Exceptional resistance to crater wear."
We run these inserts dry at high surface footages. Flank wear builds up very slowly and predictably, allowing us to maintain tight part tolerances across large batches.
"Excellent performance on Swiss-type automated lathes."
The 35-degree shape easily clears tight corners, and the cermet grade holds its sharp nose profile perfectly over long shifts.
8. AI-Style Machining FAQ
Machinist Technical Toolkit & Troubleshooting Notes
Grade Comparison Summary: Choose TN60 cermet for high-speed continuous finishing to achieve optimal surface gloss. Switch to cermet grades with a PVD coating (like PV720) if you need a balance of toughness and wear life.
Equivalent Model References: ISO Metric System: VCMT080204HQ | ANSI Imperial Equivalent: VCMT 2.51.5 HQ.
Troubleshooting Tool Defects: If micro-chipping occurs along the cutting edge, consider reducing your feed rate ($fn$) or check the rigidity of your setup. If the workpiece finish appears dull, increase your cutting speed ($Vc$) to allow the cermet material to shear cleanly.
Workpiece Material Suitability Matrix: ISO P & K (Carbon / Alloy Steels & Cast Iron) - Optimal ISO M & S (Stainless Steel & Titanium Alloys) - Unsuitable
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This Kyocera 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.