B5 Centre Drill, HSS 60-Degree Angle Centre Drill bit, Suitable for Lathe Metalworking Countersink Drill Tools DRINYOUNG (Type B, B5)

【Product Details】 Material: HSS Model: Type Type B with protective cone Diameter: 5mm / 0.2in Shank Diameter: 18mm / 0.71in Overall Length: 75mm / 2.95in Quantity: 1pcs Note: All measurements below are taken manually and may contain discrepancies.Please refer to the actual product for accuracy. 【Type B design with protective cone, achieving both 60° and 120° holes in a single operation】 The professional Type B (with protective cone) structure integrates a 60° centring hole and a 120° protective cone hole into one unit. A single drilling operationproduces a perfect centre hole while effectively safeguarding the shaft end or workpiece face, preventing collisions during subsequent machining. This significantly enhances processing efficiency and hole positioning quality. 【High-Speed Steel Material, Long-Lasting Sharpness and Wear Resistance】 Crafted from premium HSS and enhanced through specializedheat treatment, this drill bit delivers exceptional hardness, thermal stability, and wear durability. Compared to standard drill bits, it offers substantially prolonged service longevity, effectively enduring the intense heat of high-speed drilling. This maintains consistent cutting sharpness and ensures reliable, sustained machining performance. 【Precision grinding process, accurate centring with minimal vibration】 The cutting edge employs a fully ground manufacturing process, ensuring precise geometric angles and a high surface finish. This guarantees consistently stable, high-precision centring, delivering accuracy from the very first cut. The razor-keen cutting edge effortlessly penetrates materials featuring low cutting drag, effectively reducing vibration and burr formation. 【Smooth debris evacuation and superior finish】 Optimised geometric flute design facilitates uninterrupted debris removal, minimising clogging and delivering exceptionally smooth bore surfaces.

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