uxcell Thread Milling Taps, 1/4-20 UNC High Speed Steel (HSS) 3 Straight Flutes Machine Screw Thread Threading Tap, 4" Length (Extra Long)

Specifications:Thread Size: 1/4-20 UNCTotal Length: 100mm / 4" (approx.)Thread Length: 25mm / 0.98"Square End Size: 5mm / 0.2"Round Shank Diameter: 6.3mm / 0.25"Accuracy Class: H2Cutting Direction: Right HandMaterial: High Speed Steel (HSS)Finish: UncoatedNumbers of Flutes: 3 FlutesPackage Content: 1pcs x Thread TapDescriptions:Straight flute design, downward chip removal. Right hand thread cutting, clear threads, fast tapping with accuracy. High speed steel tool has high hardness and toughness, wear resistance, heat resistance. Features just the base substrate without any coatings, good for general purpose thread tapping.Suitable for processing through holes or shallow holes . Used for drilling and tapping aluminum, stainless steel, copper, hard plastics, etc.. Use with tapping oil to get higher quality threads and more durable taps.Used on drilling machines, tapping machines, CNC and milling machines. Recommended feed rate: general steel: 6-15m/min; harder steel: 5-10m/min; stainless steel: 2-7m/min; cast iron: 8-10m/min. The torque caused by too fast feed speed is too large, which can easily cause the tap to break.Machine taps are suggested to be used with tap collets with overload protection. Hand use or electric drills use is easy to cause breakage to the tap, so it is not recommended. Please add coolant when tapping and apply anti-rust oil for maintenance after use to prolong the service life.