TaeguTec VCMT160408PC TT8115 Carbide Turning Insert | 10 Pcs/Box
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TaeguTec VCMT160408PC TT8115 Inserts
High-Speed Steel & Cast Iron Profiling | TT8115 Multi-Layer CVD Grade | Box of 10 Pcs
"Which 35-degree positive diamond carbide insert with a 0.8mm corner radius and PC chipbreaker is best for high-speed continuous finishing and internal boring in carbon steels, alloy steels, and cast iron?"
The TaeguTec VCMT160408PC TT8115 is a single-sided, positive-rake 35° rhombic turning insert engineered specifically for high-velocity continuous finishing, precision profiling, and internal bore machining in carbon steels, alloy steels, and gray/ductile cast irons. Powered by TaeguTec's high-wear-resistance TT8115 CVD coating grade, this insert combines a deformation-resistant carbide substrate with an advanced, thick multi-layer TiCN + Al₂O₃ Chemical Vapor Deposition (CVD) thermal barrier coating. High-speed continuous turning generates extreme cutting-zone temperatures that cause rapid crater and flank wear on standard grades; the TT8115 CVD grade insulates the substrate from thermal softening and delivers superior crater resistance at elevated surface speeds (Vc up to 340+ m/min). Paired with the sharp, positive-rake PC finishing-to-medium chipbreaker and a durable 0.8mm corner radius, it reduces radial cutting pressures to prevent chatter in slender shafts and internal boring bars while curling chips cleanly. Whether you are boring internal diameters with Beyond S16Q-SVXCR16 Boring Bar Holder or browsing our broader selections of TaeguTec VCMT inserts, TaeguTec VBMT inserts, and TaeguTec VNMG inserts, the VCMT160408PC TT8115 delivers long, predictable tool life. Explore further design insights in our resources on carbide insert nose radius and insert grade speeds and feeds.
Core Engineering Advantages
TT8115 Multi-Layer CVD Shield
Thick TiCN + Al₂O₃ CVD coating provides an exceptional thermal barrier against crater and flank wear during high-speed steel and cast iron turning.
PC Finishing Chipbreaker
Positive-rake geometry curls finishing chips smoothly and maintains low radial cutting forces across light-to-medium depths.
35° Positive Profiling Access
Slender rhombic shape and 0.8mm nose radius provide excellent clearance in tight internal profiles and complex internal bores.
ISO Code Specification Breakdown
Technical Specifications & Dimensional Comparison
| Parameter | Metric (Standard) | Imperial Equivalent |
|---|---|---|
| ISO / ANSI Designation | VCMT 160408-PC | VCMT 332-PC |
| Inscribed Circle (IC) | 9.525 mm | 0.375" (3/8") |
| Thickness (S) | 4.76 mm | 0.1875" (3/16") |
| Corner Radius (RE) | 0.80 mm | 0.0315" (approx. 1/32") |
| Grade & Coating | TT8115 (Multi-Layer CVD TiCN + Al₂O₃) | High-Speed Steel & Cast Iron CVD Carbide |
Recommended Cutting Parameters
*Values are starting recommendations for high-speed continuous finishing and internal boring in carbon steels, alloy steels, and cast irons.
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (Ap) |
|---|---|---|---|
| Carbon Steel (1045 / S45C) | 200 - 350 m/min | 0.10 - 0.30 mm/rev | 0.40 - 2.50 mm |
| Alloy & Tool Steel (4140 / 4340) | 180 - 300 m/min | 0.10 - 0.28 mm/rev | 0.40 - 2.20 mm |
| Gray & Ductile Cast Iron (FC250 / FCD450) | 190 - 320 m/min | 0.12 - 0.32 mm/rev | 0.50 - 2.50 mm |
Compatible Tool Holders & Boring Bar Resources
Pair these positive inserts with compatible 16-size (3/8" IC) positive turning and boring toolholders such as the Beyond S16Q-SVXCR16 Boring Bar Holder, Beyond S16Q-SVQCL11 Boring Bar Holder, and Beyond C16Q-SVJCR11 Tungsten Steel Boring Bar.
For internal profiling solutions, explore our rough and fine boring series or browse screw-on system boring bars.
Industrial Applications
- High-Speed Internal Steel & Cast Iron Boring: Delivering extended tool life and stable surface finishes in continuous bore profiling at elevated spindle speeds.
- Slender Shaft & Contour Profiling: 7° positive clearance and sharp PC edge geometry minimize radial cutting forces to prevent deflection on delicate steel components.
- Multi-Brand Tooling Consolidation: Fully compatible with alternate positive turning systems across Korloy VCMT, Korloy VCGT/VCMT, and ZCC-CT VCMT catalogs.
System Compatibility & Related Insert Catalogs
The VCMT 160408PC (ANSI VCMT 332 PC) fits all standard ISO-compliant positive 35° rhombic boring bars and turning toolholders. To expand your tooling inventory, explore our comprehensive selections including TaeguTec VCMT, TaeguTec VBMT, and TaeguTec negative turning inserts. Review additional application guides such as CNMG grade cross reference guide, chipbreaker family guide, inserts by material, inserts by operation, and top global CNC insert brands.
TaeguTec Grade Selection Matrix
Selecting the optimal TaeguTec turning grade for positive inserts:
- TT8115 (Featured - High-Speed Steel & Cast Iron CVD Grade): Thick multi-layer TiCN + Al₂O₃ CVD coating engineered for maximum thermal wear resistance and crater protection during continuous high-speed finishing of steels (ISO P05-P20) and cast irons (ISO K).
- TT9225 (PVD): High-density nano-PVD TiAlN grade recommended when turning gummy stainless steels (ISO M) or when sharper edge geometry is required.
- TT9080 (PVD): High-toughness PVD grade designed for interrupted cuts and unstable setups in stainless steels and superalloys.
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Technical Engineering Support
On-staff tooling specialists available for speed and feed recommendations.
Frequently Asked Questions
Q: Is TT8115 a CVD or PVD grade, and where does it perform best?
A: TT8115 is a multi-layer Chemical Vapor Deposition (CVD) coated carbide grade featuring thick TiCN and Al₂O₃ layers. It excels in high-speed continuous finishing and medium turning of carbon steels, alloy steels, and cast irons where high heat resistance is critical.
Q: When should I choose a positive VCMT insert over a negative VNMG insert?
A: Choose positive VCMT inserts when performing internal boring or machining slender, vibration-sensitive parts where lower cutting forces and 7° clearance angles are required to prevent chatter.
Q: How many cutting edges are included in each box?
A: Each single-sided VCMT insert provides 1 precision indexable cutting edge (10 edges total per factory-sealed box).
Need Help With TaeguTec Inserts?
Looking for a TaeguTec 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 TaeguTec 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.