20PCS 3mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO

20PCS 3mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO

• product quality：20pcs Cobalt Steel - Manufactured From M35 5% Cobalt Steel, With Molybdenum And Cobalt Added To Creates A Hardened Alloy, Measuring Rockwell Hardness Up To 65, For Much Faster Cutting And Extra Longer Life Span, With Up To 10 Times When Compared with an Average HSS Drill Bit.
• 130° POINT ANGLE: A characteristic feature of carbide drills, which provides enhanced cutting stability and self-centering capability through increased contact area between the drill point and the workpiece.
• HSS Drill Bit Set: HSS cobalt drill bit set for hardened steel with excellent cutting performance. The inserts are hardened and polished for improved sharpness and precise cutting without wobbling
• For Metalworking - Particularly Successful In Cutting Through Hard Metals(Hardness Less Than Hrc38°) Such As Stainless Steel And Cast Iron, Although They Can Be Used For Softer Materials Like Copper And Aluminium, Too. Not For Hardened Steel And High Carbon Steel.
• NOTE: Although it can machine very hard materials, cemented carbide is prone to fail in unstable working conditions or situations prone to vibration. In practical applications, it is essential to use a rigid machine tool and ensure high-precision drill chuck clamping to minimize vibration. Appropriate cutting parameters (particularly feed rate) must also be selected to avoid any form of impact load.