CNC Tools > Carbide Inserts > ZCCCT > ZCC-CT RDKW 1204MO YBG205

ZCC-CT RDKW 1204MO YBG205

ZCC-CT RDKW 1204MO YBG205 is a round, PVD-coated carbide milling insert optimized for finishing to heavy-roughing of steel, stainless, and casting materials. High wear resistance, excellent surface finish, long tool life.


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  1. 🧩 Long Description – ZCC-CT RDKW1204MO YBG205

Cut Longer. Cut Faster. Spend Less.
The ZCC-CT RDKW1204MO YBG205 carbide milling insert is engineered for superior performance in modern CNC machining environments. Designed by Zhuzhou Cemented Carbide Cutting Tools Co. (ZCC-CT), one of the world’s leading carbide manufacturers, this insert offers a perfect balance of strength, wear resistance, and precision — helping machinists achieve consistent productivity and lower cost per part.

Hook / Attention Line

“Cut longer, push harder, cost less per part.” That’s what your shop needs — and the ZCC-CT RDKW 1204MO YBG205 delivers.

Key Features & Specs

  • Geometry / Insert Form

    • Round shape: RDKW1204MO style (round cutting profile)

      Inscribed circle Ø = 12 mm (dimension “B3 = 12 mm”) 

    • Thickness (S) = 4.76 mm

    • Fixing hole Ø = 4.4 mm, counter-bore style for screw with taper 40°–60° 

    • Neutral hand (N), clearance angle major = 15°

  • Grade / Coating

    • Grade designation: YBG205 

    • PVD / TiAlN-type coating (often used for this grade) 

    • Balanced for both wear resistance and toughness — suited for moderate to challenging cutting conditions 

  • Cutting Applications

    • Milling: Designed for finishing → heavy roughing operations in steel, stainless steel, and cast materials. 

    • Especially effective where high-quality surface finish is needed, and durability is critical under interrupted cuts or tougher alloys.
      Material Compatibility

    • Steel & alloy steels

    • Stainless steels

    • Cast iron / castings

Why It’s a Best Seller

  • Less downtime — thanks to high wear resistance from the YBG205 coating, the insert runs longer between changes, reducing unproductive tool swaps.

  • Better surface finish — the round geometry ensures smoother transitions and curving toolpath capability, lowering marks and rework.

  • Robust in real shop conditions — it tolerates intermittent cuts, tougher alloys, and variances in machine rigidity without chipping prematurely.

  • Versatility across job types — works from finish to heavier cuts, so shops don’t need to swap inserts as frequently.

  • Cost per component falls — you get fewer rejects, fewer tool changes, and more uptime, so your per-part tooling cost shrinks.

🏭 Application Industries

  • Automotive — machining engine blocks, transmission parts, cylinder heads.

  • Aerospace — components demanding consistent surface finish and tight tolerances.

  • Die & Mold — when finishing intricate features in tool steel or stainless.

  • General Engineering & Heavy Machinery — frames, structural parts, castings—all benefit from durable, versatile inserts.

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Frequently Asked Questions

For steel, under good conditions, YBG205 grade often supports cutting speeds in the 180–250 m/min range, depending on depth of cut and rigidity of setup. (Adjustes downward for harder steels.)

Yes — the YBG205 coating gives good wear resistance and heat control, so it is suitable for SS machining (though you may need to reduce speed/feed somewhat compared to mild steel).

Yes — while designed to give excellent finishes, it is robust enough for heavier cuts in many general-engineering scenarios, reducing the need for separate roughing inserts.

It uses a screw clamp through a 4.4 mm hole, with a counter-bore designed for a taper angle of 40°–60°. Ensure proper torque and seat flatness.

Round inserts generally allow multiple indexing (rotating to fresh edges), depending on wear. Exact number depends on geometry and whether the whole periphery is usable (typical rounds allow 6 or 8 indexes depending on design).

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