{"id":7748,"date":"2024-04-09T23:35:41","date_gmt":"2024-04-10T07:35:41","guid":{"rendered":"https:\/\/shengenfab.com\/?p=7748"},"modified":"2025-06-09T19:27:03","modified_gmt":"2025-06-10T03:27:03","slug":"types-of-taps","status":"publish","type":"post","link":"https:\/\/shengenfab.com\/en_gb\/types-of-taps\/","title":{"rendered":"Types of Taps for Threading: How to Choosing the Right Taps"},"content":{"rendered":"
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Are your threaded holes stripping out, or are your taps breaking too often? That’s a sign your tap type might not match your material or setup. Many professionals overlook this step, assuming all taps function similarly. Let’s fix that. In this guide, we’ll walk you through tap types and help you choose the right one.<\/p>

Taps may look similar, but slight design differences affect their performance. Choosing the right one helps you cut faster and reduce tool wear. Let’s look closer.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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<\/h2>

What Is a Tap in Threading?<\/h2>

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A tap is a tool used to cut threads inside a hole. It works by removing material and shaping the internal wall so a screw or bolt can fit. Taps come in many shapes and sizes. Some are made for hand use, while others are used on machines. They are designed to match specific thread sizes and standards, like metric or UNC.<\/p>

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Taps have cutting edges, called flutes, that allow chips to escape. The number of flutes, the tip shape, and the thread angle all impact how effectively the tap works with various materials. Taps are used in multiple industries, including automotive and electronics, to create strong threaded connections.<\/p>

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Components of Taps<\/h2>

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Choosing the right tap helps to understand its parts. Each part plays a role in how the tap cuts threads and clears chips.<\/p>

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Body<\/h3>

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The body is the central working part of the tap. It contains the threads and cutting edges. The body determines the tap’s thread size and cutting performance. Most of the cutting happens in this section.<\/p>

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Shank<\/h3>

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The shank is the straight part above the body. It connects the tap to a tool holder or wrench. It doesn’t do any cutting. Its size must match the tool holder for a secure fit.<\/p>

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Tang<\/h3>

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The tang is a small, flat, or square end at the top of the shank. It’s often used in hand tapping to grip the tool. Some machine taps may not have a tang. The tang allows manual turning when using a tap wrench.<\/p>

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Flutes<\/h3>

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Flutes are the grooves cut along the body. They create the cutting edges and help chips escape. Most taps have two to four flutes. More flutes mean smoother finishes but less space for chip flow. Fewer flutes allow better chip removal but may reduce finish quality.<\/p>

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Land<\/h3>

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The land is the raised area between flutes. It supports the cutting edge and guides the tap in the hole. It keeps the tap centered and steady during threading.<\/p>

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Heel<\/h3>

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The heel is the back part of the land. It doesn’t cut but helps guide the tap. It controls the amount of material cut with each turn.<\/p>

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Cutting Face<\/h3>

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The cutting face is the part of the flute that cuts the thread. It’s shaped to remove material as the tap rotates. A sharp-cutting face makes clean threads and reduces cutting force. The design varies depending on the material and type of tap.<\/p>

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Types of Taps<\/h2>

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Each type of tap is designed for a specific purpose. Some are better suited for manual use, while others are designed for use with machines or particular threads.<\/p>

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Hand Taps<\/h3>

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Hand taps are the most common type of tap. They are used with a tap wrench for manual threading. They usually come in sets of three: taper, plug, and bottoming. These taps are slower, but they provide reasonable control. They are best for small jobs or low-volume work.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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<\/h3>

Taper Tap<\/h3>

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A taper tap has a long, gentle cutting lead. The first 7 to 10 threads are gradually tapered. This makes it easy to start the thread straight. It removes less material with each turn. It’s usually the first tap used when threading by hand.<\/p>

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Plug Tap<\/h3>

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A plug tap has a medium taper. It has 3 to 5 threads that are cut before the complete thread profile is formed. It’s the most commonly used tap in general work. It balances cutting force and chip control well.<\/p>

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Bottoming Tap<\/h3>

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A bottoming tap has only 1 or 2 tapered threads at the tip. The rest are full-size threads. It’s used to cut threads to the bottom of a blind hole. It is usually used after a taper or plug tap has started the thread.<\/p>

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<\/h3>

Master Tap<\/h3>

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A master tap is used for checking and calibrating thread gauges and measuring tools. It is made with very high precision. It’s not used for cutting production threads but for quality control.<\/p>

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Gas Tap<\/h3>

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A gas tap is designed for threading pipes and fittings used in gas systems. It usually follows a different thread standard, like BSP or NPT. These taps are used where a tight seal is needed to prevent leaks.<\/p>

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Machine Tap<\/h3>

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Machine taps are made for use in tapping machines or CNC equipment. They are stronger than hand taps and can cut threads faster. They come in spiral point or spiral flute styles. These taps are suitable for high-volume production.<\/p>

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Machine Screw Tap<\/h3>

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A machine screw tap is a slight tap made for threading holes for machine screws. These are used in precision work, like electronics or small mechanical parts. They follow standard screw thread sizes. They are often used in softer metals or plastics.<\/p>

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Extension Tap<\/h3>

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An extension tap has a longer shank than a standard tap. It helps reach deep or hard-to-access holes. The cutting part is the same as a regular tap. These are useful for parts with limited clearance or deep cavities.<\/p>

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Bend Shank Tap<\/h3>

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A bend shank tap has a curved or offset shank. It’s used in exceptional cases where straight taps can’t fit or turn. It’s not common but can be custom-made for specific parts or machines. These taps solve clearance problems in complex assemblies.<\/p>

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Stay Bolt Tap<\/h3>

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Stay bolt taps are used in boiler and pressure vessel work. They are designed to cut special threads used in stay bolts. These taps are typically long and strong, designed to handle tough materials and drill deeper holes.<\/p>

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Spiral Fluted Tap<\/h3>

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A spiral-fluted tap has twisted flutes that carry chips upward and out of the hole. It works well in blind holes. It keeps chips from clogging at the bottom. It also reduces the risk of tap breakage. This type is often used in soft metals, such as aluminum or copper.<\/p>

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Fluteless Tap<\/h3>

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A fluteless tap is also called a roll tap or forming tap. It doesn’t cut metal. Instead, it forms threads by pushing the material outward. It creates stronger threads with no chips. These taps are best suited for use with ductile materials, such as aluminum, brass, or mild steel. They are often used in high-volume production.<\/p>

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<\/p>

Tap Material Types<\/h2>

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The material of a tap affects its cutting performance, tool life, and cost. Choosing the right tap material helps reduce breakage and improve thread quality.<\/p>

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High-Speed Steel (HSS) Taps<\/h3>

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HSS taps are the most widely used. They offer a good mix of hardness, toughness, and cost. They work well on various materials, including steel, aluminum, and brass. HSS taps are flexible and resist breaking under regular use. They are a good choice for general-purpose tapping.<\/p>

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Cobalt Steel Taps<\/h3>

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Cobalt steel taps are made by adding cobalt to HSS. This makes them more complicated and more heat-resistant. They are ideal for harder materials, such as stainless steel or titanium. Cobalt taps last longer under harsh cutting conditions. They resist wearing better than standard HSS taps.<\/p>

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Carbide Taps<\/h3>

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Carbide taps are extremely hard and wear-resistant. They hold their cutting edge longer than HSS or cobalt. They are used in high-volume production or with abrasive materials. However, they are more brittle and can break under side force or misalignment. Use carbide taps in rigid setups, such as CNC machines<\/a>.<\/p>

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Coated Taps (TiN, TiCN, TiAlN)<\/h3>

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Coated taps have a surface layer that boosts performance.<\/p>

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