How to read the geometry callout on DC426
The DC426 series black-coated solid carbide drill is designed for high-precision micro drilling in challenging materials such as steel, stainless steel, copper, and aluminium alloys.
Understanding the Series Code and Geometry Callout
The DC426 series is a specialized grinding series that provides consistent performance in micro drilling applications. The series code "DC426" is used to identify the product line, and it is repeated in the part numbers to ensure clarity and traceability. The geometry callout "D1.0073*38" is a critical element in defining the tool's cutting characteristics. Each field in the callout represents a specific parameter: "D1.00" refers to the diameter of the drill, "7" indicates the flute length, "3" denotes the helix angle, and "38" specifies the relief angle. These parameters collectively influence the tool's cutting efficiency, chip evacuation, and surface finish.
Measured Values and Their Impact on Machining
The DC426 series includes part numbers such as DC426-1000-04 and DC426-0500-04, which are within the diameter range of 0.04 to 3.0 mm. The minimum diameter capability of 0.10 mm allows for drilling in extremely tight spaces, which is essential for micro machining applications. For instance, the diameter of 0.10 mm is a critical specification that ensures the tool can access hard-to-reach areas without compromising structural integrity. This capability is particularly important when working with materials like stainless steel, which are known for their high strength and poor thermal conductivity.
Another key measurement is the flute length of 7 mm. This dimension affects the tool's ability to remove material efficiently and evacuate chips from the cutting zone. A flute length of 7 mm is optimal for maintaining a balance between chip removal and tool rigidity, especially in micro drilling where chip accumulation can lead to tool wear and surface defects.
Part Number and Application Details
The part numbers in the DC426 series are structured to provide specific information about the tool's dimensions and features. For example, "DC426-1000-04" indicates a drill with a diameter of 0.10 mm, a flute length of 1.00 mm, and a specific geometry configuration. This structure allows users to quickly identify the tool's specifications without referring to additional documentation.
| Part Number | Diameter (mm) | Flute Length (mm) |
|---|---|---|
| DC426-1000-04 | 0.10 | 1.00 |
| DC426-0500-04 | 0.05 | 0.50 |
The DC426 series is suitable for general micro drilling applications, making it a versatile choice for a wide range of industries. Its design ensures that it can handle the demands of drilling in various materials while maintaining precision and reliability.
Verified production record
| Field | Recorded value |
|---|---|
| Record type | Grinding series |
| Series code | DC426 |
| Description | Black-coated solid carbide drill |
| Coating | black |
| Part numbers on record | 1073 |
| Diameter range (mm) | 0.04 - 3.0 |
| Capability | Min. diameter 0.10 mm |
| Application | Steel, stainless steel, copper and aluminium alloys; general micro drilling. |
| Example part numbers | DC426-1000-04, DC426-0500-04, DC426-0800-04 |
| Example geometry callout | D1.0073*38 |
Figures above are transcribed from the production order record and the printed catalogue extracts. Confirm the held tolerance for a specific part number in the written quotation.
See the recorded geometry on the DC426 page of this catalogue.