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Kyocera VBMT160408HQ CJ225P
Kyocera VBMT160408HQ CJ225P – high-performance carbide turning insert for finishing to medium steel turning.
The Kyocera VBMT160408HQ CJ225P is a premium rhombic turning insert designed specifically for finishing to medium steel operations. With a 16 mm inscribed circle (IC), 0.8 mm corner radius, and the advanced CJ225P CVD-coated carbide grade, this insert delivers excellent edge toughness, consistent chip control and long tool-life in demanding turning applications. The HQ chipbreaker geometry is optimized for steel turning with light interruptions, offering stable chip evacuation, low cutting forces and superb surface finishes. Ideal across automotive, aerospace, general engineering and die & mold production, the insert reduces downtime, lowers cost per part and assures production reliability. CNC Tools Depot has it in stock : check real-time availability, pricing and bulk order options for your plant.
Hook / Attention Line
Cut more parts, change inserts less — slash cost per component with the VBMT160408HQ CJ225P.
Discover longer tool life, faster cutting speeds and superior surface finish in one insert.
Key Features & Specs
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Geometry: VBMT 16 04 08 (IC 16mm size, 0.8 mm corner radius) featuring the HQ chipbreaker “finishing-to-medium” design for steels.
Grade: CJ225P – a CVD-coated carbide grade from Kyocera designed for steel machining (and also cast iron / light interruptions). -
Coating & substrate: Premium carbide substrate with CVD coating for wear resistance and toughness (Kyocera turning insert catalog shows HQ / CJ series built for finishing to medium steel applications)
Cutting applications: Ideal for turning operations (external and internal) on carbon steel, alloy steel, cast iron; suitable for light interruption, finishing to medium cuts in lathe/CNC turning. From the chipbreaker chart CJ = “improved chip-evacuation at small ap & high feed” for steel.
Why It’s a Best Seller
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Less downtime — thanks to high toughness and wear resistance, you spend fewer minutes changing inserts and more minutes machining parts.
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Better surface finish — the HQ chipbreaker geometry gives stable chip evacuation and sharp cutting, which helps improve surface quality and consistency.
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High wear resistance — the CJ225P grade is built to stand up to steel machining with light interruptions, maintaining edge integrity and extending edge life. From supplier listing: “general-purpose chip breaker for medium machining of steel with light interruption. Strong edge chip breaker excellent chip control at low feed rates and small depth of cut.” advanceengstores.com
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Proven popularity — That combination of geometry + grade + brand reliability means lots of shops choose this insert as their “go-to” for steel turning.
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In short: fewer machine stops, fewer insert changes, better yield from each insert — translating directly to improved productivity and reduced cost per component.
🏭 Application Industries
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Automotive components (shafts, cam & crank parts, housings)
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Aerospace – secondary/tertiary turning of steel components
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Die & Mold – finishing of tool steel profiles, housings
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General engineering – medium-volume production of alloy steel parts, cast iron housings
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Heavy machinery – when turning steel forgings with light interruptions
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Frequently Asked Questions
It’s primarily designed for carbon steel and alloy steel turning (finishing to medium cuts), and can also handle cast iron in light-interruption conditions.
This insert uses the HQ chipbreaker (finishing-to-medium) which is shaped to deliver efficient chip control, low cutting resistance and consistent finish. The “CJ” series indicates improved chip evacuation at small depths-of-cut and higher feed rates in steel.
CJ225P is a CVD-coated carbide grade from Kyocera targeted at steel machining with good wear resistance and fracture toughness — making it suitable for reliable production turning.
• Extended tool life → fewer indexings and insert changes
• Better surface finish → fewer part re-works or secondary operations
• Stable machining even under light interruptions → more predictable production
• Lower cost per component when tool life and finish are improved.
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