PATIKIL 20 Pack 0.9mm Micro Drill Bits Carbide Tungsten Steel | 1/8" Shank 135° Mini Small Bits Print Circuit Board Drilling Tool for CNC Engraving Precision Machinery

PATIKIL 20 Pack 0.9mm Micro Drill Bits Carbide Tungsten Steel | 1/8" Shank 135° Mini Small Bits Print Circuit Board Drilling Tool for CNC Engraving Precision Machinery

• PACKING LIST: 20 packs of micro drill bits in 0.9mm/0.03543inch cutting diameter, 3.175mm (1/8inch) shank diameter, 10mm/0.39 inch flute length, 38mm/1.5 inch overall length, 135° point angle, suitable for processing small components. NOTE: color is random
• FEATURE: Our carbide twist drills combine ​92% Tungsten Carbide / ​​8% Cobalt for extreme hardness (HRA 89-95), wear resistance (3x HSS life), and heat stability (800°C+). Featuring razor-sharp cutting edges and precise milling grooves, ensuring maximum productivity and durability in demanding applications.
• APPLICATION: With their high hardness, wear resistance, and precision machining capabilities, cemented carbide mini drill bits are widely used in high-precision applications, including electronics manufacturing (PCB micro-hole drilling), precision machinery (micro-component processing, micro-hole machining)
• INSTRUCTION: Make sure the workpiece is firmly clamped (such as using a vise or fixture) to prevent it from sliding during drilling. Position the twist drill at 90° to the workpiece. For thick materials, drill in multiple passes to prevent overheating or breakage.
• NOTE: 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. Always use coolant in high-speed machining to protect carbide tools from heat-induced failure.