RS PRO HSS M3 to M12 Hand tap and drill set Tap Set Model No 9172599

RS PRO HSS M3 to M12 Hand tap and drill set Tap Set Model No 9172599 is a collection of cutting tools used to create internal threads in pre-drilled holes or nuts by hand. It is an essential toolset in metalworking, mechanical, and manufacturing applications where threaded connections are required.

The hand tap set typically consists of three main types of taps: taper tap, plug tap, and bottoming tap (also known as second tap). Each tap serves a specific purpose in the threading process.

Taper Tap: The taper tap, also known as the starting tap, is the first tap used in the sequence. It has a more pronounced taper at the end of the flutes, which allows it to ease into the hole gradually. The taper tap is used to create the initial threads in a hole and helps to guide the subsequent taps. Its taper design also prevents the tap from binding or breaking during the threading process.

Plug Tap: The plug tap comes after the taper tap in the threading sequence. It has a shorter taper compared to the taper tap and is used for threading to a specified depth. The plug tap is suitable for through-holes and stops when it reaches the desired depth.

Bottoming Tap (Second Tap): The bottoming tap is the last tap used in the threading sequence. It has a consistent diameter along its length and a short chamfer at the starting end. This design allows it to cut threads close to the bottom of a hole, making it ideal for threading holes that have already been partially threaded by the taper and plug taps. The bottoming tap ensures that the full depth of the hole is threaded, providing a stronger connection when used with bolts or screws.

Hand tap sets are available in various sizes and thread pitches to accommodate a wide range of applications. They are made from high-speed steel (HSS) or other durable materials to withstand the cutting forces and maintain sharpness over extended use.

When using a hand tap set, the material must be securely held in place, and each tap is turned clockwise into the hole using a tap wrench. Proper lubrication is essential during the tapping process to reduce friction and heat generation, prolonging the tool's lifespan and ensuring accurate thread formation.

In summary, a hand tap set is a versatile and indispensable toolset for creating internal threads in holes. Its taper, plug, and bottoming taps enable a sequential and precise threading process, providing secure and reliable connections between components in various industries, such as automotive, aerospace, and construction.