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Kyocera VNGA160408S01525 A66N
The VNGA160408S01525 A66N is a TiN-coated ceramic insert from Kyocera, engineered for hardened material turning. Negative insert, excellent wear & oxidation resistance, ideal for finishing/semiroughing in hard steels and components. Low cost per component thanks to long edge life.
The Kyocera VNGA160408S01525 A66N is a premium ceramic turning insert combining a tough ceramic substrate (Al₂O₃ + TiC) with a TiN PVD coating. Designed for cutting hardened steels (approx. 38-64 HRC), this negative, 80° diamond (VNGA) shaped insert delivers high wear resistance, excellent oxidation stability and superior edge life even under continuous or lightly interrupted cuts.
Hook / Attention Line:
“Cut harder. Last longer. Reduce cost-per-part with Kyocera’s VNGA160408S01525-A66N — the ceramic insert that turns hardened steel into opportunity.”
Key Features & Specs:
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Geometry / Format: ISO/VNGA style, negative insert, 80° diamond-shape with neutral hand (-) rake, corner radius approx. r = 0.8 mm.
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Grade / Material / Coating: Grade A66N — TiN-coated ceramic (Al₂O₃ + TiC ceramic with a TiN PVD finish).
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Application / Cutting Use: Best for turning (especially hardened steels), external turning, finishing to semi-roughing of hard materials and steels in hardness range ~38-64 HRC. Good in continuous or light interrupted cuts.
Why It’s a Best Seller
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Longer tool-life: The ceramic substrate plus TiN coating resists oxidation and crater wear — you get more edge life under heat.
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Stable performance under harder conditions: Works well in hardened steels and heat-resistant materials; maintained cutting under higher speeds, less frequent insert changes.
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Better surface finish / reduced downtime: The sharper geometry and coating help reduce chip adhesion, thermal damage, burrs etc., which means fewer rejects / less rework.
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Lower cost per component: Even though ceramic inserts tend to cost more, the durability and reduced replacement frequency mean overall cost drops.
Industries & Application Areas:
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Automotive (e.g. hardened shafts, gears)
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Aerospace (high-strength materials, stability under heat)
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Die & mold making (tooling, hardened tool steels)
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General engineering (hard steels, high wear components)
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Frequently Asked Questions
The A66N ceramic is built to machine hardened steels in approximately 38-64 HRC, performing well in this range with good edge life
It’s best suited for continuous or lightly interrupted cuts. Heavy interruption may risk chipping because ceramics are less tough than CBN/carbide under shock.
You should use rigid toolholders, stable machine setup, and where possible moderate cooling. Ceramics tend to do better without heavy coolant jets interfering with thermal stability. But coolant may be used in light interruption. (Manufacturers recommend depending on the setup.)
Key benefits are longer tool life at high temperature, less frequent changes, better surface finish, less thermal distortion, which together reduce cost per component and downtime.
A66N is Kyocera’s TiN-coated ceramic grade (Al₂O₃ + TiC base) designed for hardness and oxidation resistance. The TiN finish helps reduce friction and wear at high cutting speeds and temperatures.
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