1 Thread Tap:
Thread Size: 1/4-20 UNC; Thread Length: 25mm / 0.98"; Square Shank Size: 5mm / 0.2"; Total Length: 69mm / 2.72"; Accuracy: H2
1 Twist Tdrill Bit:
Cutting edge diameter: 5.1 mm / 3/16 inch; Shank diameter: 5.1 mm / 3/16 inch; Cutting edge length: 52 mm / 2.05 inch; Total length: 86 mm / 3.39 inch
Description: 6542 (M2) high speed steel tap and drill bit set provides excellent heat resistance and hardness for durability and long life, and has good cutting performance. Uncoated thread taps are suitable for a wide range of applications.
Black oxide coating on drill bit improves durability, corrosion resistance, lubrication, reduces friction and heat and extends tool life The twist tdrill bit has a sharp cutting edge and a large spiral groove to provide a clean smooth cutting and make metal chips easier
Straight flute taps work through or shallow blind holes for downward tip removal, clear threads, burr-free, right-handed cutting, quick and accurate tapping. Suitable for most metal, cast iron, aluminum, stainless steel, aluminum alloy, bronze, hard plastic.
Machine taps are used in drill press, tapping, CNC, milling machines. When used with appropriate lubricant (cutting fluid, oil, etc.) you will get better quality threads and durable taps & drill bits. Not recommended for manual tapping or electric drills.
Tip: First drill a hole with a twist drill bit, then tapping with the thread tap. Tapping and drilling angles must be 90 degree vertical and stable The harder the slower the speed.
The tapping depth should not exceed 1.5 times the diameter of the tap (for example, the diameter M5x0.8 should not exceed approximately 5mm and the depth should not exceed 7.5mm).