Swallow Tail Shape HSS Twist Drill Bits

Technical Data

1. Material & Hardness: Crafted from high-speed steel (e.g., grades like M2, 6542), it has a hardness of 63 – 66HRC.
2. Dimensional Specifications: The common diameter ranges from 5mm to 20mm, and the overall length is 60 – 100mm.
3. Structural & Other Details: It follows DIN standards. The swallow-tail spiral structure optimizes chip removal and enables self-centering to avoid drilling deviation. Its surface may undergo vapor deposition or polishing. Some models adopt a 135° double-angle design for faster cutting, enhancing drilling efficiency.

Areas of Application

1. Woodworking: Ideal for processing hardwood, softwood and other wood materials. It is suitable for drilling holes, making tenons, grooves and mortises. It matches well with drilling machines or mortising machines, favored by both professional workshops and amateur woodworkers.
2. Metalworking: Applicable for drilling holes in non-alloy steel, alloy steel, cast iron, aluminum, copper and other common metals
3. Plastics & Composites Processing: Capable of drilling holes in thermosetting, thermoplastic plastics and some composite materials
4. DIY & Light Engineering.