1mm - 20mm Custom End Mill Carbide Expansion Reamer With Spiral Flutes Thread Shank

Solid Carbide Expansion Reamer with Spiral Flutes Thread Shank Adjustable Diameter for Precision Boring, 1/8" to 3/4"

Introduction:

Our premium solid carbide expansion reamer features an innovative spiral flute design with micro-adjustable diameter capability, engineered for precision hole finishing in demanding industrial applications. The threaded shank ensures secure mounting in CNC machines, lathes, or machining centers, while the expansion mechanism allows precise sizing adjustments within ±0.005mm. Manufactured from ultra-fine grain tungsten carbide, this professional-grade tool delivers exceptional wear resistance and surface finishes up to Ra 0.4μm.

Features:

• • • Solid carbide construction (Grade K30) for maximum rigidity

    • Spiral flute design (35° helix) for superior chip evacuation

    • Precision ground cutting edges with 6-8 flutes

    • Micro-adjustable diameter range: 1/8" to 3/4" (3-19mm)

    • Threaded shank (1/2"-20 UNF standard, other threads available)

    • Adjustable in 0.001" (0.025mm) increments

    • TiAlN or AlCrN coating options

Advantages Over Competitors

✓ Maintains tight tolerances (±0.005mm) in production runs
✓ 3X longer tool life than HSS reamers
✓ Reduced cutting vibration through balanced spiral design
✓ Single tool replaces multiple fixed-size reamers
✓ Excellent results in interrupted cut applications
✓ Saves setup time with quick diameter adjustments

Typical Applications

• • • Precision bore finishing in engine blocks/cylinders

    • Hydraulic component manufacturing

    • Aerospace bearing housings

    • Medical implant fixture holes

    • Die/mold guide pin holes

    • High-volume automotive components

Detailed Picture

Our workshop:

Why Choose This End Mill?

1. 1. 1. German-engineered carbide for extreme wear resistance

      2. Patented adjustment mechanism maintains concentricity

      3. Custom configurations available (flute count, angles)

      4. 100% inspected prior to shipment

      5. Technical support for optimal machining parameters

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!

  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.