Large-Diameter PCD Step Reamer with Dual Chamfers (90° & 45°) | Aoshiji® Custom Tool
Overview
The Large-Diameter PCD Step Reamer with Dual Chamfers (90° & 45°) is engineered for precision machining of oversized bores where accuracy, surface finish, and durability are essential. Equipped with polycrystalline diamond (PCD) cutting edges, it delivers outstanding wear resistance, long service life, and repeatable performance under high-production demands.
Its dual-chamfer geometry (90° & 45°) allows deburring, edge finishing, and step-hole machining in one pass, reducing cycle time and increasing productivity. The step reamer design provides precise bore guidance and stability, while its large-diameter capacity makes it an ideal choice for automotive, aerospace, and heavy-equipment applications.
Applications
Precision finishing of large bores in automotive engine blocks, cylinder heads, and transmission housings
Aerospace components requiring tight tolerance step reaming with integrated chamfers
Heavy-equipment and energy-sector parts with oversized bore machining needs
Hydraulic and pneumatic housings where multi-diameter and chamfer accuracy are critical
PCD REAMER:
SOLID CARBIDE REAMERS :
BRAZED CARBIDE REAMERS :
Key Features
Large-diameter step design – Optimized for oversized bore finishing with micron-level precision
Dual chamfers (90° & 45°) – Enables chamfering, deburring, and edge finishing in one operation
PCD cutting edges – Superior wear resistance and long tool life compared to carbide reamers
Step reamer geometry – Provides bore guidance for stability and accuracy during cutting
Custom-manufactured – Fully adaptable in diameter, step length, and chamfer geometry per drawing
Surface finish capability – Achieves Ra ≤ 0.2 µm on non-ferrous materials
Benefits
Consolidates multiple processes into one tool (step reaming + dual chamfering)
Reduces cycle time and increases throughput in high-volume production
Delivers consistent tolerances (≤ IT6) for critical aerospace and automotive components
Improves surface quality with mirror-like finishes on large bores
Extends tool life significantly due to PCD’s hardness and wear resistance
Technical Specifications
| Parameter | Specification |
|---|---|
| Tool type | Large-Diameter PCD Step Reamer |
| Cutting edges | PCD (Polycrystalline Diamond) |
| Step geometry | Dual-step with dual chamfers (90° & 45°) |
| Diameter range | Ø10 – Ø60 mm (custom available) |
| Chamfer geometry | 90° & 45° standard, other angles on request |
| Tolerance | ≤ IT6 (custom tighter tolerances available) |
| Surface finish | Ra ≤ 0.2 µm achievable |
| Application focus | Oversized bores in automotive, aerospace, and heavy-equipment machining |
Options & Customization
Custom diameters and step lengths for specific bore designs
Additional chamfer geometries (30°, 60°, 82°, 100°) available
Shank options: cylindrical, HSK, BT, Weldon, or modular connections
Coolant-through or solid-body designs based on application requirements
Coating and edge-prep customization for enhanced tool life
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Contact
For custom designs, bore specifications, or technical consultation, please contact:
[email protected]
Aoshiji® Custom Tool – Precision PCD and Custom CNC Tooling Solutions
