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Deskar CNMG120408-CQ LF9218
The Deskar CNMG120408-CQ LF9218 is a negative-geometry, 80° rhombic turning insert in grade LF9218 with CQ chipbreaker — engineered for steel and stainless steel turning with superior wear resistance and stable edge life.
Meet the Deskar CNMG120408-CQ LF9218, a premium carbide turning insert designed for consistent performance and extended tool life in steel and stainless steel machining. Engineered with Deskar’s advanced LF9218 grade and precision CQ chipbreaker geometry, this insert delivers a perfect balance of wear resistance, toughness, and surface finish quality.
Hook / Attention Line
“Run longer, cut faster, cost per part drops — meet Deskar’s CNMG120408-CQ LF9218, a turning insert built to push your productivity ahead.”
Key Features & Specs:
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Geometry & form: CNMG120408 in CQ chipbreaker style, negative insert with 80° rhombic (C-shape) form
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Grade / Coating: LF9218 (CVD / coated carbide), designed for strength + wear resistance in tougher steels and stainless steels
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Corner radius & dimensions: r = 0.8 mm typical for “08” size
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Rake / clearance: 0° front rake (neutral) with 0° back angle (N) in the TM variant; in CQ, chip control geometry is optimized for steel cutting
Recommended cutting speeds:
• For steel / “P” materials: 80–180 m/min
• For stainless steel / “M” materials: 80–180 m/min
• For cast irons / “K” materials: 80–130 m/min -
Compatible holders: MCLNR/L, MCKNR/L, MCMNN, MCRNR/L, PCBNR/L, PCLNR/L etc. for turning / boring applications
Application: External turning, finish / semi finishing, light profiling — especially effective for stainless and alloys
Why It’s a Best Seller
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Longer tool life: The LF9218 grade’s coating + substrate resist wear even under aggressive turning, reducing insert change frequency
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Stable edge & less downtime: Consistent wear behavior means operators can count on predictable tool life, fewer surprises, less machine idle time
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Better surface finish: The CQ chipbreaker geometry helps maintain smooth chip flow and stable cutting, improving finished surface quality
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Lower cost per component: Fewer insert changes, reduced manual intervention, and higher material removal rates translate to lower cost per part
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Versatility: It handles steel, stainless, and alloys – so you don’t need a large set of grades for every material batch
🏭 Application Industries
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Automotive & auto components (shafts, housings, spindle parts)
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Aerospace & gas turbine components (alloyed steels, stainless parts)
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Die & mold, tooling (steel, stainless mould inserts)
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General engineering, heavy machinery, shafts, couplings
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Petrochemical, valves, pumps, etc.
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Frequently Asked Questions
It’s designed primarily for steels (“P” group) and stainless steels (“M” group). It can also be used in some cast iron (“K”) applications.
For steel and stainless: ~ 80–180 m/min. For cast iron: ~ 80–130 m/min
It is a negative CNMG 80° insert with CQ chipbreaker geometry, ideal for steel turning and stable chip control.
It works with standard CNMG / rhombic negative holders like MCLNR/L, MCKNR/L, MCMNN, MCRNR/L, PCBNR/L, PCLNR/L etc.
The LF9218 grade offers higher wear resistance, stronger edge stability, and better longevity in demanding steel and stainless applications compared to standard or entry grades. This reduces downtime and lowers cost per component.
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