TaeguTec VNMG160408MT TT8020 Carbide Turning Insert | 10 Pcs/Box
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TaeguTec VNMG160408MT TT8020 Inserts
Heavy-Toughness 35° Diamond Profiling | Universal TT8020 PVD Grade | Box of 10 Pcs
"Which 35-degree diamond carbide insert is best for interrupted cuts and tough profiling in stainless steel and alloy steels?"
The TaeguTec VNMG160408MT TT8020 is an ultra-tough, negative 35° rhombic turning insert engineered for demanding CNC copy turning, contouring, and medium-duty machining under unstable or interrupted cutting conditions. Powered by TaeguTec's specialized TT8020 PVD coating grade, this insert combines a high-toughness, shock-absorbing carbide substrate with an ultra-smooth PVD TiAlN thermal shield. Because a slender 35° diamond corner is naturally vulnerable to mechanical shock, the TT8020 grade prevents sudden edge chipping, micro-fractures, and Built-Up Edge (BUE) when machining austenitic stainless steels (304/316), heat-resistant superalloys, and forged alloy steels. Paired with the reinforced MT medium-turning chipbreaker and a sturdy 0.8mm nose radius, it maintains predictable chip evacuation across multi-directional profiling passes. Whether you are machining complex shafts with cross-holes or exploring TaeguTec negative turning inserts for versatile shop operations, the VNMG160408MT TT8020 delivers exceptional edge security.
Core Engineering Advantages
TT8020 High-Toughness PVD
Shock-resistant carbide substrate paired with smooth PVD TiAlN coating prevents tip fracture on interrupted cuts and gummy alloys.
MT Medium Chipbreaker
Strengthened cutting edge land protects the acute 35° nose while breaking chips cleanly across variable depths of cut.
35° Acute Profiling Access
Slender rhombic geometry clears steep shoulders, narrow relief grooves, and complex contours inaccessible to 55° or 80° inserts.
ISO Code Specification Breakdown
Technical Specifications & Dimensional Comparison
| Parameter | Metric (Standard) | Imperial Equivalent |
|---|---|---|
| ISO / ANSI Designation | VNMG 160408 MT | VNMG 332 MT |
| 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" (1/32") |
| Grade & Coating | TT8020 (PVD TiAlN) | High-Toughness PVD Carbide |
Recommended Cutting Parameters
*Values are starting recommendations for medium profiling and interrupted turning. Maintain steady flood coolant for stainless steel and superalloys.
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (Ap) |
|---|---|---|---|
| Austenitic Stainless (304 / 316) | 100 - 180 m/min | 0.12 - 0.30 mm/rev | 0.50 - 2.80 mm |
| Alloy & Carbon Steel (4140 / 1045) | 130 - 230 m/min | 0.15 - 0.35 mm/rev | 0.60 - 3.20 mm |
| Heat-Resistant Alloys (Inconel / Ti) | 30 - 65 m/min | 0.10 - 0.22 mm/rev | 0.40 - 2.00 mm |
Compatible Tool Holders & Boring Bar Resources
Pair these inserts with rigid 16-size (3/8" IC) negative 35° diamond external turning holders such as the Beyond MVUNR2020K16 Right-Hand Turning Tool Holder, Beyond MVUNL2525M16 Left-Hand Turning Tool Holder, and Beyond MVQNR2525M16 Right-Hand Turning Tool Holder.
For internal profiling and bore machining, explore our rough and fine boring series, browse screw-on system boring bars, or read our engineering guide on how to choose the right boring bar and insert.
Industrial Applications
- Interrupted & Forged Surface Profiling: Absorbing mechanical impact on stepped shafts with keyways, cross-holes, and uneven forgings.
- Stainless Steel & Superalloy Copy Turning: Multi-directional OD contouring on 304/316 stainless steel, duplex, and Inconel components.
- Undercutting & Relief Grooves: Slender 35° rhombic geometry accesses steep shoulders and tight back-angles cleanly.
System Compatibility & Related Insert Catalogs
The VNMG 160408MT (ANSI VNMG 332 MT) fits all standard ISO-compliant 35° rhombic toolholders featuring a 9.525mm (3/8") inscribed circle pocket, including top-and-hole clamp (M-type), double-clamp (D-type), and lever-lock (P-type) turning systems. To stock your tool crib across all geometries, explore our full range of TaeguTec VNMG inserts, TaeguTec DNMG inserts, and TaeguTec CNMG inserts. You can also compare cross-brand tooling options across Korloy VNMG, ZCC-CT VNMG, TaeguTec DNMG, and TaeguTec CNMG collections.
TaeguTec Grade Selection Matrix
Selecting the optimal TaeguTec turning grade for your production setup:
- TT8020 (Featured - High-Toughness PVD): Universal PVD grade engineered for maximum edge toughness in interrupted cuts, stainless steels (ISO M), superalloys (ISO S), and low-to-medium speed steel turning (ISO P).
- TT9080 / TT9030: Specialized nano-PVD grades optimized specifically for continuous-to-medium austenitic stainless steel turning at higher cutting speeds.
- TT8125 / TT8115: Thick CVD coated grades designed for high-speed continuous turning of carbon steels and cast irons.
Why Machinists Choose Our Store
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Directly sourced original TaeguTec factory-sealed packages (10 pcs/box).
Same-Day Dispatch
In-stock cutting tools ship rapidly to keep your CNC spindles turning.
Technical Engineering Support
On-staff tooling specialists available for speed and feed recommendations.
Frequently Asked Questions
Q: When should I choose TT8020 over TT8125 or TT8115?
A: Choose TT8020 whenever your operation involves interrupted cuts, scale, stainless steel, superalloys, or lower spindle speeds where a 35° VNMG tip might chip with harder CVD grades like TT8125 or TT8115.
Q: What does the "MT" chipbreaker stand for on TaeguTec inserts?
A: "MT" stands for Medium Turning. It features a reinforced cutting edge land that protects the slender 35° tip from mechanical fracture while breaking chips cleanly across moderate feeds and depths of cut.
Q: How many cutting edges are included in each box?
A: Each double-sided VNMG insert provides 4 usable indexable cutting corners (40 total edges per 10-piece 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.