4-Flute PCD Step Reamer with Shank – High-Accuracy Multi-Diameter Finishing
Overview
The 4-Flute PCD Step Reamer with Shank is a high-precision multi-diameter reaming tool designed to finish multiple bore sizes in a single operation. Built with an integrated shank for superior rigidity, it provides excellent stability, reduced vibration, and consistent accuracy in demanding CNC production. Equipped with polycrystalline diamond (PCD) cutting edges, this reamer ensures long tool life, exceptional wear resistance, and mirror-like surface finishes in aluminum alloys, magnesium, copper, graphite, and fiber-reinforced composites.
Applications
Precision reaming of automotive cylinder blocks, engine housings, and transmission components
Aerospace components requiring multi-step bore finishing with micron-level tolerances
Hydraulic valves, pneumatic systems, and precision manifolds with complex bore requirements
High-volume machining of lightweight alloys, copper alloys, and composite materials
Key Features
4-flute cutting geometry – Provides stability, balance, and high productivity in large-scale machining
Step reaming design – Finishes multiple bore diameters in one operation for improved efficiency
PCD cutting edges – Delivers superior wear resistance and tool life in non-ferrous machining
Integrated shank construction – Maximizes rigidity, reduces deflection, and enhances bore accuracy
Coolant-through option – Improves chip evacuation, heat control, and tool longevity
Benefits
Consolidates multiple reaming operations into a single machining step
Ensures IT6-level tolerances with mirror-like surface finishes (Ra ≤ 0.2 µm)
Significantly reduces cost per component through extended tool life and fewer tool changes
Enhances process reliability and consistency for high-volume CNC production lines
Fully customizable to match specific bore dimensions, step lengths, and tolerance requirements
Technical Specifications
| Parameter | Specification |
|---|---|
| Tool type | PCD Step Reamer with Shank |
| Cutting edges | 4 (four-flute configuration) |
| Step configuration | 2–3 steps standard, multi-step customizable |
| Cutting material | PCD (Polycrystalline Diamond) |
| Diameter range | Ø4 – Ø25 mm per step (custom available) |
| Shank type | Cylindrical / Weldon / HSK adapter |
| Coolant supply | Coolant-through or solid design available |
| Tolerance | ≤ IT6 (custom tighter tolerances on request) |
Options & Customization
Step count: 2-step, 3-step, or multi-step configurations
Equal or unequal step lengths tailored to bore geometry
Shank options: Cylindrical, HSK, BT, or customized modular connections
Coolant-through or solid design for application-specific requirements
Adjustable tolerance versions for ultra-precision finishing
Related Tools
2-Flute PCD Step Reamer Head with Entrance Chamfer – Model PCD-SRH-2F-ST2-CH45-V1
3-Flute PCD Reamer with Shank – Precision Diamond Hole Finishing | Aoshiji® Custom Tool
6-Flute 2-Step PCD Reamer Head – Multi-Diameter High-Precision Reaming
- Reamers – Solid Carbide & PCD Custom CNC Tools
- PCD Reamer with Shank – Solid Shank Precision Reaming
Contact
For detailed customization on bore steps, tolerances, or shank compatibility, please contact:
[email protected]
Aoshiji® Custom Tool – Precision PCD and Custom CNC Tooling Solutions
