4 Flutes Left Hand Spiral Reamer Bule Nano Coating Tungsten Carbide Reamer H7

4 Flutes Left Spiral Tungsten Solid Carbide Reamer With Bule Nano Coating

Core Advantages:

✔ Left-Spiral Flute Design (40° helix) - Forces chips forward for optimal blind-hole performance
✔ Blue Nano Titanium Coating - 30% harder than conventional TiN with superior heat resistance (1,100°C)
✔ 4-Flute Balanced Geometry - Delivers IT6 tolerance (Ra 0.2μm) with vibration-dampening stability
✔ Ultra-Fine Carbide Substrate - 0.5μm grain structure for edge durability in hardened materials

Features:

Blind Hole Optimization

• Chip-Drag Prevention: Left spiral actively pulls chips out of deep cavities

• 15° Primary Relief: Eliminates workpiece rubbing at hole bottom

Coating Advantages

• Low Friction Coefficient (μ=0.3) reduces cutting forces by 20%

• Oxidation Resistance outperforms standard TiN in stainless steels

Precision Features

• Laser-Measured Runout <0.003mm

• Dual Margin Design enhances hole straightness (>5×D depth)

Special Applications:

▶ Medical - Bone screw holes with <0.005mm deviation
▶ Aerospace - Turbine disk cooling holes (anti-galling edge prep)
▶ Automotive - Fuel injector bodies requiring µ-level finishes

Detailed Pictures:

Our wokshp:

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.

  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.