uxcell Combination Drill and Tap Bit, 1/4" Hex Shank M4 x 0.7 Metric TiAlN Coated M35 Cobalt High Speed Steel Spiral Flute Drilling Tapping Tool 2pcs - a22040200ux0955

• Combination Drill and Tap Bit: Thread Size: M4 x 0.7. Hex Shank Size: 1/4". Combination drill and tap bit set can complete hole drilling, tapping, deburring and countersinking. One-step operation greatly saves processing steps and improves working efficiency. Wide Applications: Suitable for processing blind holes. Used for tapping aluminum, stainless steel, cast iron, cast steel, hardened steel, bronze, hard plastics, etc.. Recommended feed rate: general steel: 6-15m/min. harder steel: 5-10m/min. stainless steel: 2-7m/min. cast iron: 8-10m/min. Features: Self-centering point, do not need assistant center drilling or center punching. Quick change 1/4-inch hex shank can be used on power tools more easily and securely. A tapered end on hex shank can prevent excessive tapping. Coating: AlTiN coating improves the high temperature resistance. It has excellent wear resistance, oxidation resistance. M35 cobalt high speed steel tool features high hardness (HRC65-66) and high red hardness, high wear resistance. Tips: Use on drilling machines, tapping machines, CNC and milling machines. Use with tapping oil to get higher quality threads and more durable taps. Machine taps are suggested to be used with tap collets with overload protection.