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3-Flute PCD Reamer with Shank – Precision Diamond Hole Finishing | Aoshiji® Custom Tool

Overview

The 3-Flute PCD Reamer with Shank is a high-precision solid reaming tool designed for finishing bores in aluminum, magnesium alloys, composites, and other non-ferrous materials. Featuring three polycrystalline diamond (PCD) cutting edges, it provides an optimal balance of surface finish, stability, and extended tool life. Its solid one-piece shank design ensures maximum rigidity, making it ideal for high-volume CNC production lines where accuracy and consistency are critical.

For a complete overview of PCD reamers, including piloted, brazed, form, multi-step, combination, and adjustable reaming tools, visit our main PCD Reamers guide.

PCD Reamers guide

Applications

  • Precision finishing of automotive engine and transmission bores

  • Aerospace structural parts and lightweight housings requiring tight tolerances

  • Hydraulic and pneumatic system bores with surface quality demands

  • High-accuracy finishing of die-cast aluminum and magnesium components

  • CNC machining centers requiring consistent diamond reaming performance

Key Features

  • 3-flute geometry – Optimized for chip evacuation and stable cutting action

  • Solid shank construction – Ensures rigidity and reduced tool deflection

  • Ultra-fine finishing – Achieves Ra ≤ 0.2 µm in non-ferrous machining

  • Micron-level accuracy – Maintains bore roundness, straightness, and IT6 tolerance

  • Extended tool life – PCD cutting edges significantly outperform carbide reamers

  • Customizable diameters and step profiles available for special applications

Benefits

  • Provides reliable performance in mass-production environments

  • Superior rigidity compared to modular head systems

  • Reduces tool deflection, improving bore concentricity and surface integrity

  • Lowers overall cost per part through extended tool life and fewer tool changes

  • Flexible customization options ensure compatibility with diverse applications

Technical Specifications

ParameterSpecification
Tool typePCD Reamer with Shank
Flutes3
Cutting materialPCD (Polycrystalline Diamond)
Diameter rangeØ4 – Ø25 mm (customizable)
Shank typeCylindrical / Weldon / HSK (on request)
Application focusPrecision bore finishing in non-ferrous alloys and composites
Coolant supplyCoolant-through design available
Tolerance≤ IT6 (custom tighter tolerances available)

Options & Customization

  • Available in 2, 3, 4, or 6-flute configurations

  • Step reamers, tapered reamers, and profile reamers available

  • Through-coolant options for improved chip evacuation and thermal control

  • Tailored geometries for complex bore profiles and multi-step hole finishing

  • Compatible with CNC machining centers for aerospace, automotive, and precision engineering

Related Tools

Contact

For detailed drawings, customization options, or quotations, please contact:
[email protected]
Aoshiji® Custom Tool – Precision PCD and Custom CNC Tooling Solutions

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PCD REAMER:

PCD Reamer Basics

Full Form Reamers

Brazed PCD Reamers

Piloted PCD Reamers

Multi-Step PCD Reamers

Adjustable PCD Reamers

Combination PCD Reamers

SOLID CARBIDE REAMERS :

REAMERS

STEP REAMERS

BRAZED CARBIDE REAMERS :

For Hydraulic Control Valve Body

Aoshiji® Custom Tool – 3-flute PCD reamer with shank for precision diamond hole finishing.

PCD Reamer Basics

2-flute PCD step reamer for multi-step bore finishing in aluminium, combining multiple diameters in one pass

Definition, functions, and selection boundaries for PCD reamers in bore finishing. Start here before choosing brazed, step, form, piloted, adjustable, or combination PCD reamer concepts.

Piloted PCD Reamers

Piloted PCD reamer with pilot guide for alignment-critical bore finishing and coaxiality control

Piloted PCD reamers add a guiding pilot to improve alignment in coaxiality-critical bores. They are often used when maintaining bore-to-bore relationship, straightness, or alignment is as important as final size and finish.

Brazed PCD Reamers

4-flute reamer with an integrated chamfer for finishing the bore and entry chamfer in one pass

Brazed PCD reamers are a mainstream production solution where PCD cutting segments/tips are brazed onto a tool body. This concept is widely used for straight-shank, step, and form reamers because it balances performance with practical tool manufacture and cost control.

Full Form Reamers

BT taper shank PCD form reamer for profile-related bore finishing, combining wear resistance and repeatable form accuracy

PCD form reamers are tailored to bores with defined profile features where form accuracy must be repeated over long runs. The geometry is application-specific and is typically driven by the bore profile, allowance, and required surface integrity.

Multi-Step PCD Reamers

Three-step profiled PCD step reamer for stepped bore finishing with formed transitions in one pass

Multi-step PCD reamers finish multiple diameters (and often chamfers) in a single pass, reducing tool changes and improving positional consistency between features. They are commonly selected in high-volume production where cycle time and repeatability are critical.

Combination PCD Reamers

2-flute helical combination PCD reamer integrating PCD OD machining, internal step turning, and ID chamfering for one-pass bore finishing

Combination tools integrate reaming with additional operations to reduce tool changes and improve process efficiency. The exact concept depends on the part features and the process plan, and is typically developed as a dedicated production tool.

Adjustable PCD Reamers

fine-adjustable PCD reamer with diameter adjustment unit for micro-adjustable final sizing

Adjustable PCD reamers are used when fine diameter compensation is required—typically on larger bores—so size can be corrected without replacing the full tool. This concept supports predictable tool management in long production runs.

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