Mastering Threads: The Essential Guide to Threading Taps

Threading taps, commonly referred to as taps, are cutting tools used to create internal threads in a drilled hole, typically in metal or other materials. These threads allow for screws, bolts, or other fasteners to be inserted and securely tightened into the material.

There are various types of threading taps, each designed for specific threading applications and materials. Some common types include:

Threading Taps


Hand Taps: Hand taps are used manually and are operated by hand or with a tap wrench. They typically have a tapered end for easy starting and a straight fluted section for cutting threads. Hand taps are available in different thread profiles, such as metric, unified, and pipe threads.

Machine Taps: Machine taps are designed for use with power tools or tapping machines. They often feature a longer shank and a square drive for use with a tap holder or collet. Machine taps are suitable for high-volume threading operations and are available in various coatings and configurations for different materials and applications.

Spiral Flute Taps: Spiral flute taps, also known as gun taps, feature a helical flute design that helps to evacuate chips and improve chip flow during threading. This design reduces the risk of chip buildup and helps to prevent tap breakage, making spiral flute taps ideal for deep-hole threading and blind-hole applications.

  1. Spiral Point Taps: Spiral point taps, also known as gun nose taps or plug taps, have a pointed end with angular flutes that push chips forward during threading. This design is particularly effective for through-hole threading, as it helps to eject chips ahead of the tap, reducing the risk of chip accumulation and tap breakage.


  2. Pipe Taps: Pipe taps are specifically designed for creating threads in pipe fittings and other cylindrical workpieces. They feature tapered threads that match the taper of standard pipe threads, allowing for a tight seal when connecting pipes and fittings.

Threading taps are available in a wide range of sizes, thread pitches, and materials, including high-speed steel (HSS), cobalt, and carbide. Selecting the appropriate tap depends on factors such as the material being threaded, the desired thread size and pitch, and the threading method (hand or machine). Additionally, using cutting lubricants and proper tapping techniques can help extend the life of threading taps and ensure clean and accurate threads.

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