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PCD 3-Step Tapered Reamer with Shank

Overview

The PCD 3-Step Tapered Reamer with Shank is designed to perform multi-step and tapered bore finishing in a single operation. Combining a straight reaming section at the front with a 3-step tapered geometry at the rear, this tool enables efficient machining of components with complex bore requirements.

With an integrated shank design, the tool ensures maximum rigidity, concentricity, and dimensional stability for ultra-precise machining. Equipped with polycrystalline diamond (PCD) cutting edges, it provides superior wear resistance, extended tool life, and exceptional surface finishes in aluminum alloys, composites, and other non-ferrous materials.

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

  • Automotive and aerospace parts requiring multi-step tapered bore finishing

  • Hydraulic and fuel system components with precision bore geometries

  • Non-ferrous materials machining, including aluminum, magnesium, copper, and composites

  • High-efficiency finishing of engine housings, valves, and precision connectors

Key Features

  • PCD cutting edges – Exceptional wear resistance and long tool life

  • Front straight reaming section – Ensures bore alignment and stability

  • 3-step tapered geometry – Machines complex tapered bores in a single pass

  • Integrated shank construction – Enhances rigidity, concentricity, and accuracy

  • CNC-compatible – Suitable for machining centers and precision boring machines

Benefits

  • Combines straight and tapered bore machining into one tool

  • Reduces cycle time by eliminating multiple tool changes

  • Delivers mirror-like surface finish with micron-level accuracy

  • Extends tool life, lowering overall cost per component

  • Increases productivity in high-volume aerospace and automotive machining

Technical Specifications

ParameterSpecification
Tool typePCD Step Reamer with Shank
Flutes2 / 4 / 6 (customizable)
Step count3 steps (customizable per drawing)
GeometryTapered multi-step bore
Diameter rangeØ4.0 – Ø20.0 mm
Chamfer option45° / 60° entrance chamfer (optional)
Shank typeCylindrical / HSK / BT / custom
Cutting materialPCD (Polycrystalline Diamond)
CoolantThrough-coolant available

Options & Customization

  • Step count: 2, 3, or 4 steps per customer drawing

  • Taper angle: fully customizable per bore design

  • Shank options: cylindrical, HSK, BT, or other standards

  • Special compound bore geometries and edge prep available

  • Optional chamfering integrated into the step design

Related Tools

Contact

For drawings, bore specifications, or custom reamer designs, 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 – PCD 3-step tapered reamer with shank for multi-step taper 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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