4 Flute Coolant Through Step Drill for 17 4PH Stainless Steel AlTiN Coated Carbide Reamer with Internal Cooling Channels

3 Flute Carbide Roughing End Mill for Aluminum Wavy Design CNC Milling Cutter OEM ODM Available in Various Lengths Diameters

Introduction:

Our 4-flute coolant-through step reamer is specially engineered for precision hole machining in 17-4PH precipitation-hardening stainless steel and other tough materials. Featuring advanced AlTiN coating and internal coolant channels, this carbide reamer delivers exceptional tool life and dimensional accuracy in the most demanding machining conditions.

The unique step design allows for combined drilling and reaming operations in a single tool, significantly reducing cycle times while maintaining tight tolerances (IT6-IT7). Ideal for aerospace, medical, and oil/gas applications where 17-4PH stainless steel's combination of high strength and corrosion resistance challenges conventional cutting tools.

Features:

1. Superior Tool Design

• 4-flute geometry optimized for 17-4PH's work-hardening characteristics

• 30° spiral flute for smooth chip evacuation in deep-hole applications

• Step design combines drilling and reaming functions (2D/3D drawings available)

2. Advanced Material Technology

• Micro-grain tungsten carbide substrate (0.6μm) for maximum toughness

• AlTiN nano-composite coating with 3,500HV hardness and 900°C oxidation resistance

• Through-tool coolant capability (MQL/flood compatible)

3. Performance Advantages

✓ 3× longer tool life vs standard carbide reamers in 17-4PH
✓ IT6 tolerance achievable in production environments
✓ 40% higher feed rates through optimized chip breaker geometry
✓ Eliminates secondary operations with precision step machining

4. Customization Options

• Diameter ranges: 3-25mm (custom sizes available)

• Step configurations: 2-3 steps per tool (custom designs)

• Shank types: Straight, Weldon, HSK, CAT

• Special geometries: Left-hand spiral, reduced neck options

Applications:

① Aerospace Components

• Landing gear pivot holes

• Engine mount bushings

② Medical Implants

• Orthopedic device through-holes

• Surgical instrument precision bores

③ Oil & Gas Equipment

• Valve body seat machining

• Downhole tool flow channels

④ General Precision Engineering

• Hydraulic manifold systems

• Bearing housing bores

Detailed Pictures:

Our workshop:

Promotion policy:

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!

Other products:

FAQ:

1. Are you a manufacturer or trading company?

We are a professional manufacturer of carbide tools which established in 2017.

2. Which CNC grinding machine do you use?

All of our carbide tools are produced by imported WALTER grinding machines.

3. Which shipping method do you usually use?

We usually send goods by express like FedEx, UPS, DHL, TNT, EMS, ETC.

We also can send products to your shipping agent in China.

4Flute Coolant Through Step Drill

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4 Flute Coolant Through Step Drill for 17 4PH Stainless Steel AlTiN Coated Carbide Reamer with Internal Cooling Channels Images