PATIKIL 5.5mm Drill Bit, M35 Cobalt 5% High-Speed Steel Jobber Straight Shank 135° Gold Finish for Stainless Steel Hard Metal - 5 Pack

• PACKING LIST: 5 packs of drill bits in 5.5mm cutting diameter, 55mm/2.17inch flute length, 93mm/3.66inch overall length, 135° split point tip.
• FEATURE: The drills are made of M35 high speed steel with 4.50% to 5.50% cobalt content, which has excellent hardness, wear resistance, heat resistance and high crack resistance, making it suitable for machining hard metals. The gold finish effectively improves corrosion resistance and extends the drill bits' life.
• APPLICATION: The M35 twist drill is suitable for professional machining, particularly for drilling stainless steel. It is also suitable for processing high-hardness materials, including carbon steel, iron, aluminum, copper, plastic, wood, and more.
• NOTE: Position the twist drill bit at 90° to the surface of the workpiece. For thick materials, drill in multiple passes to prevent overheating or breakage. For large holes, start with a guide hole. Use cutting fluid to improve efficiency, extend tool life, and reduce material damage.
• INSTRUCTION: When machining different materials, the spindle speed and feed rate vary. Generally, the harder the material, the lower the spindle speed and feed rate should be. For specific speed and feed rate recommend for common materials, please refer to the details provided on the product page.

√FEATURE: M35 high-speed steel drill bits, containing 4.50% to 5.50% cobalt, has high hardness. These bits are recognized for their exceptional wear resistance, impressive heat resistance, and high crack resistance, making them suitable for machining high-hardness metals. Gold Finish can be used to improve the surface properties of metal materials and increase their wear resistance and corrosion resistance, thus extending the service life of the drill bit.and working efficiency The 135-degree tip angle drill provides excellent processing stability and is well-suited for harder materials. It effectively reduces the risk of cutting-edge chipping, thereby improving drilling efficiency and hole quality. √APPLICATION: The 5% cobalt high-speed steel drill bits are specifically designed for cutting high-hardness materials., such as steel, alloy cast iron, stainless steel, iron, copper, aluminum alloy, and cast iron. They are also effective in plastics and wood. √PACKING LIST: -Cutting Edge Diameter: 5.5mm -Shank Diameter: 5.5mm -Flute Length: 55mm -Total Length: 93 mm / 3.66inch -Package Content: 5 pcs x Drill Bit √NOTE: Applicable coolant, during the machining process, friction between the drill bit and the material generates a significant amount of heat, coolant can effectively reduce the temperature, preventing the tool from overheating, and extending the drill bit lifespan.