4 Flute Carbide Step End Mill with Through Coolant AlTiN Coating High Speed Deep Cutting for Steel Titanium Hardened Alloys

Introduction:

Our 4-Flute Carbide Step End Mill is a premium cutting tool engineered for high-performance machining in the toughest materials. Featuring advanced through-coolant technology and a durable AlTiN coating, this end mill delivers exceptional heat resistance, extended tool life, and superior chip evacuation—making it ideal for deep cavity milling, slotting, and profiling in aerospace, mold & die, and heavy industrial applications.

Features:

✔ Solid Tungsten Carbide Construction – Ultra-hard (92-94 HRA) for maximum wear resistance in hardened steels (up to HRC 60) and exotic alloys.

✔ 4-Flute Optimized Design – Balances material removal rate and surface finish, reducing vibration during high-speed operations.

✔ Through-Coolant Channels – Internal coolant holes (Ø1.5mm or custom) deliver precise lubrication to the cutting edge, minimizing heat buildup and prolonging tool life.

✔ AlTiN (Aluminum Titanium Nitride) Coating – Enhances hardness (3,800 HV) and thermal stability (up to 900°C), ideal for dry or near-dry machining.

✔ Step-End Geometry – Combines roughing and finishing in one tool, eliminating the need for multiple tool changes.

✔ High-Speed Capable – Engineered for 10,000+ RPM CNC machining centers.

Advantages:

• 50% Longer Tool Life: AlTiN coating reduces flank wear in abrasive materials like titanium and Inconel.

• Efficient Heat Dissipation: Through-coolant design prevents thermal cracking in deep-pocket milling.

• Versatile Performance: Single tool handles slotting, side milling, and plunging operations.

• Reduced Downtime: Fewer tool changes increase productivity in batch processing.

Applications:

Aerospace: Machining turbine blades (Ti-6Al-4V), engine mounts.

Mold & Die: Deep cavity milling in hardened tool steels (P20, H13).

Oil & Gas: Valve components (Inconel 718, 17-4PH stainless).

Medical: Implant machining (cobalt-chrome, stainless steel).

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)

Related products:

  CHANGZHOU AMG PRECISION TOOL MANUFACTURING CO., LTD. is a leading manufacturer and solution provider specializing in high-performance carbide cutting tools for precision CNC machining applications. With a strong commitment to innovation and quality, we design and produce an extensive range of standard and custom cutting tools, including carbide drill bits, end mills, reamers, and complex non-standard forming tools tailored to meet the most demanding machining challenges.