Why HDCS636 shows up in inspection failures

The HDCS636 series demonstrates consistent performance across its diameter range, with key measurements that directly influence tool life and machining efficiency.

Series Overview and Key Specifications

The HDCS636 series is a TiN-coated left-hand step solid carbide drill designed for non-standard step drilling applications. This series supports a diameter range of 0.433 to 3.0 mm, with a minimum diameter capability of 0.15 mm. The series is particularly suited for creating stepped and counterbored holes, making it a versatile tool for precision machining. The series includes part numbers such as HDCS636-0991, HDCS636-0473, and HDCS636-1315, each tailored to specific drilling requirements.

Measured Variables and Their Impact on Machining

Two critical measured variables from the HDCS636 series are the diameter and the flute length. For instance, the diameter of the HDCS636-0991 part is 1.088 mm, and the flute length is 1.60 mm. These measurements are essential because they determine the tool's ability to cut through various materials efficiently. The diameter affects the tool's strength and the amount of material it can remove in a single pass, while the flute length influences chip evacuation and coolant flow. A smaller diameter may require more precise control, whereas a longer flute length can enhance chip removal, reducing the risk of tool wear and improving surface finish.

Defect Diagnosis and Process Optimization

When the HDCS636 series encounters issues, the first variable to check is the diameter measurement. This is because any deviation from the specified diameter can lead to improper hole sizing and increased tool wear. For example, if the diameter of HDCS636-0991 is found to be 1.088 mm, but the actual measurement is off by even a few micrometers, it can cause significant machining problems. To ensure consistent results, it is crucial to hold the flute length and coating thickness constant. The flute length of 1.60 mm and the TiN coating are critical for maintaining the tool's performance and longevity. By maintaining these variables, manufacturers can ensure that the HDCS636 series delivers reliable and efficient results across its diameter range.

Verified production record

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.