How to read the geometry callout on HDCS636
The HDCS636 series delivers consistent performance in non-standard step drilling applications with precise dimensional control and durable TiN coating.
Understanding the Series Code and Geometry Callout
The HDCS636 series is a TiN-coated left-hand step solid carbide drill designed for non-standard step drilling. The series code "HDCS636" is structured to convey specific attributes of the tool, including coating, geometry, and application. Each part number within this series follows a standardized format that includes the series code, diameter, flute length, and other critical parameters. For instance, the example geometry callout "D1.0881.60118°+1.502.065°3.238(285)" provides detailed information about the tool's geometry. The first segment "D1.088" indicates the diameter of the drill, while "1.60" refers to the flute length. The angle "118°" represents the helix angle, which influences chip evacuation and cutting efficiency. The second segment "1.502.065°" describes the step geometry, where "1.50" is the step diameter, "2.0" is the step length, and "65°" is the step angle. The final part "3.2*38(285)" specifies the shank diameter, length, and overall length of the tool, respectively.
Measured Values and Their Impact on Machining
The HDCS636 series includes tools with a diameter range of 0.433 to 3.0 mm, with a minimum diameter of 0.15 mm. These dimensions are critical for ensuring the tool can access tight spaces and maintain accuracy in complex geometries. For example, the diameter of 0.433 mm allows for drilling in narrow slots or intricate parts, while the maximum diameter of 3.0 mm ensures the tool can handle larger workpieces. The minimum diameter of 0.15 mm is particularly important for micro-drilling applications, where precision and tool rigidity are paramount. The TiN coating enhances wear resistance and reduces friction, contributing to longer tool life and improved surface finish.
Performance and Application Considerations
The HDCS636 series is specifically tailored for non-standard step drilling, which requires the tool to create stepped and counterbored holes with high accuracy. The geometry callout ensures that each tool is designed to meet the specific requirements of the application. The step angle of 65°, for example, is optimized for efficient material removal while maintaining tool stability. The flute length of 1.60 mm is suitable for a wide range of materials, balancing chip evacuation and cutting performance. The overall length of 285 mm ensures the tool can reach deep cavities without compromising rigidity. These specifications collectively contribute to the series' reliability and effectiveness in demanding machining environments.
| Diameter (mm) | Flute Length (mm) | Helix Angle (°) | Step Diameter (mm) | Step Length (mm) | Step Angle (°) | Shank Diameter (mm) | Length (mm) |
|---|---|---|---|---|---|---|---|
| 1.088 | 1.60 | 118 | 1.50 | 2.0 | 65 | 3.2 | 285 |
Verified production record
| Field | Recorded value |
|---|---|
| Record type | Grinding series |
| Series code | HDCS636 |
| Description | TiN-coated left-hand step solid carbide drill |
| Coating | TiN |
| Part numbers on record | 1508 |
| Diameter range (mm) | 0.433 - 3.0 |
| Capability | Min. diameter 0.15 mm |
| Application | Non-standard step drilling for stepped and counterbored holes. |
| Example part numbers | HDCS636-0991, HDCS636-0473, HDCS636-1315 |
| Example geometry callout | D1.0881.60118°+1.502.065°3.238(285) |
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 HDCS636 page of this catalogue.