Carbide-Tipped Metal Drill Bit A metal drill bit with a carbide insert, designed for demanding applications where standard HSS drills are no longer sufficient. Thanks to the use of extremely hard materials, it offers significantly improved durability and cutting performance. Technical Specifications Diameter: 4 mm Overall length: 65 mm Working length: 35 mm Speed: 1000–1500 rpm Cutting element: YG8 cemented carbide Hardness: 90 HRA (~70 HRC) Body: 40CR steel Product Features Extreme hardness and durability of the cutting edge YG8 cemented carbide reaches a hardness of approx. 90 HRA (~70 HRC), which means: the cutting edge wears much more slowly it retains sharpness even during intensive use it allows drilling in harder-to-machine materials This solution is especially appreciated by users working in continuous or serial production. High wear resistance Compared to standard drill bits: the cutting surface wears down much more slowly the tool maintains its performance parameters for longer the need for frequent drill replacement is reduced Result: savings in time and operating costs Stable performance at high temperatures Drilling in metals generates very high temperatures. Cemented carbide: does not lose hardness as quickly as HSS does not dull due to overheating ensures stable cutting even under higher loads Important operating information (honest and professional) Cemented carbide, in addition to its advantages, also has specific properties: it is hard but brittle it does not tolerate impacts or hammering action it is sensitive to lateral loads and misalignment Therefore, for best results it is recommended to: use stable guidance (e.g. a drill press) avoid “manual angled pressure” work with properly selected speed and feed rate