The Combination Drill & Countersink Tool is engineered to perform precision drilling and countersinking in a single pass, ensuring consistent hole quality, reduced cycle time, and superior alignment for screw-seat and chamfered-hole applications. This multi-stage geometry minimizes tool changes, improves machining accuracy, and provides stable cutting across steel, aluminum, stainless steel, and composite materials.
The Combination Drill & Countersink Tool integrates pilot drilling, primary countersinking, and optional back-side chamfering into one streamlined tool design. Manufactured from high-performance solid carbide, brazed PCD, or coated carbide, it ensures high rigidity, excellent heat resistance, and long tool life even under continuous industrial production conditions.
Screw head seat machining (82°, 90°, 100°, 120° profiles)
Precision drilling and chamfering in one operation
Aerospace fastener holes
Automotive bracket, housing, and chassis components
Industrial equipment and mechanical assemblies
Metal plates, structural beams, and fixture components
Aluminum, steel, stainless steel, and non-ferrous materials
Multi-stage drill + countersink geometry for single-pass machining
Customizable countersink angle: 82°, 90°, 100°, 120°, or per drawing
Pilot drill and countersink concentricity optimized for tight tolerances
Available with solid carbide, brazed PCD, or coated carbide
Reduced tool changes and improved machining cycle time
Optional back-side countersink and stepped geometries
Designed fully per customer drawings and application requirements
Higher machining efficiency through reduced tool changeovers
Improved alignment and concentricity between drilling and countersinking
Extended tool life with advanced carbide and PCD materials
Stable performance in automated CNC machining environments
Perfect fit for high-precision screw holes and chamfered seating surfaces
Custom profiles ensure optimal performance for unique applications
| Parameter | Specification |
|---|---|
| Tool Type | Combination Drill & Countersink Tool |
| Pilot Drill Diameter | Custom per drawing |
| Countersink Diameter | Custom (flat-bottom, conical, or stepped countersink) |
| Countersink Angle | 82°, 90°, 100°, 120°, or per requirement |
| Secondary Countersink (optional) | Available per drawing (front/back chamfer) |
| Countersink Depth | Custom |
| Flute Length | Custom |
| Overall Length (OAL) | Custom |
| Shank Diameter | Standard or reduced-neck / custom sizes |
| Cutting Material | Solid Carbide, Coated Solid Carbide, Brazed Carbide, Brazed PCD, Brazed CBN, Solid HSS, Brazed HSS |
| Coating Options | TiAlN, AlTiN, DLC, diamond coating, or uncoated |
| Machining Materials | Steel, stainless steel, aluminum, non-ferrous alloys, composites |
| Customization | Fully designed per customer drawings & specifications |
Aoshiji® Custom Tool provides full customization for Combination Drill & Countersink Tools to meet precise engineering, assembly, and production requirements. Every tool can be tailored based on detailed drawings, material specifications, and process parameters.
Available Custom Options Include:
Custom pilot drill diameter, flute length, and stepped geometry
Countersink angle customization: 60°, 82°, 90°, 100°, 120°, or per drawing
Single-side or double-side countersinking for through-holes
Flat-bottom, conical, stepped, or special-profile countersinks
Customized shank types: cylindrical, reduced-neck, or reinforced shank
Special-length designs for deep reach, long engagement, or restricted spaces
Material selection: solid carbide, brazed carbide, brazed PCD, CBN-tipped
Coating options including TiAlN, AlTiN, DLC, diamond, or uncoated
Chipbreaker geometry for difficult-to-machine alloys
Tools manufactured strictly per customer drawings and specifications
For custom Combination Drill & Countersink Tool quotations, engineering consultation, or to submit your technical drawings:
Email:engineering@aoshiji.com
You may also upload tool drawings, part models, or application details through your project request page on the Aoshiji® website. Our engineering team will provide optimized tool geometry recommendations, machining parameters, and quotation within one business day.
Related machining solutions and tools commonly applied for combined drilling and countersinking operations, accurate hole entry preparation, and reduced tool changes include:
PCD Countersink
PCD Chamfer Drill Bit
PCD Step Reamer
Multi-Stage PCD Combination Tool
Custom PCD Cutting Tools
