B5 Centre Drill, HSS 60-Degree Angle Centre Drill bit,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 B-type (with protective cone) structure integrates the 60° positioning hole and the 120° protective cone hole into a single unit. Through a single drilling procedure, the central hole can be formed, while effectively protecting the shaft end or the workpiece surface, preventing collisions during subsequent processing, and improving processing efficiency and hole positioning accuracy. 【High-speed steel material】 This drill bit is constructed from high-quality high-speed steel, featuring excellent hardness, thermal stability and wear tolerance. Compared to ordinary drill bits, its service longevity is extended, enabling it to withstand the high temperatures during high-speed drilling. This ensures a stable cutting sharpness and guarantees continuous and reliable processing performance. 【Precision Grinding Process】 The cutting edge is manufactured using the full grinding process, resulting in a high surface finish. This ensures stable and high-precision positioning. The razor-sharp cutting edge can effortlessly penetrate materials featuring low cutting drag, effectively reducing vibration and the generation of burrs. 【Smooth debris evacuation and superior finish】 The optimized geometric slot design helps achieve continuous waste discharge, reduces clogging, and provides a smooth bore surface.

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