4 Flute Carbide bull nose carbide end mill D12mm TiSiN Coated R2 R3 Corner Radius 45° Helix Angle for Steel Alloy Finishing CNC Milling Cutter for Hardened Metals

Introduction:

This high-performance bull nose end mill is designed for precision finishing operations in steel, alloy steel, and hardened metals (up to HRC60+). Featuring a TiSiN coating and 4-flute design, it delivers exceptional wear resistance, extended tool life, and superior surface finishes in demanding CNC milling applications.

Features:

✔ Premium Carbide Material – Manufactured from ultra-fine grain carbide substrate for high rigidity and thermal stability, reducing deflection during machining.

✔ TiSiN Coating – Enhances hardness (up to 3500 HV) and oxidation resistance, ideal for high-speed cutting (HSC) and dry machining of tough materials.

✔ Optimized Geometry –

• 45° helix angle: Reduces vibration and improves chip evacuation for smoother finishes.

• R2/R3 corner radius: Strengthens the cutting edge, minimizing chipping while maintaining precision in contours and pockets.

✔ 4-Flute Design – Balances efficiency and finish quality, offering faster feed rates than 2-flute designs while maintaining fine surface results.

✔ Bull Nose Tip – Combines the benefits of flat-end and ball-nose mills, ideal for semi-finishing to finishing operations with minimal step-over marks.

Advantages Over Competitors

• Extended Tool Life: TiSiN coating reduces friction and wear, lowering cost per part.

• Superior Finish: 45° helix and polished flutes minimize burrs and improve chip flow.

• Versatility: Suitable for both roughing and finishing in medium-to-hard materials.

Typical Applications

• Materials: Carbon steel, alloy steel, tool steel, stainless steel (annealed), hardened metals (HRC45-60+).

• Operations: Profile milling, 3D contouring, mold/die finishing, rib machining, and precision slotting.

• Industries: Aerospace, automotive, mold & die, general metalworking.

Detailed Pictures:

Our workshop:

New Customer Special Offers:

To help you experience our premium products, we’re excited to offer the following exclusive promotions for first-time buyers:

1.Free Test Samples

Get free samples (total value ≤ $20 USD) when you cover the international shipping cost.

Perfect for evaluating our product quality and performance risk-free.

2.$50 USD Discount on First Order

New customers can enjoy a $50 discount on the first order of $500 or more.

A great way to start our partnership with extra value!

Our advantages:

1.Advanced grinding machines: All of our grinding machines are WALTER and SAACKE brands.

2.Advanced inspection machines: We have ZOLLER, OMEGA, PG1000, etc. For inspecting each carbide tools.

3.Fast feedback: we offer 24 hours online service

4.Strict quality control system:
We strictly adhere to a three-stage inspection process for each tool:
Raw material inspection
Semi-finished product inspection after production
Final inspection after coating (pre-shipment check)

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