M3 x 0.5mm Metric Tap Set, Tungsten Steel, Taper and Plug Thread Cutter TD034

Product Information

People would need a drill size chart and tap size chart to determine the proper tap drill for a certain thread size or proper tap for an existing hole. This formula works for both metric and imperial units, and for all 60-degree threads (all ISO, DIN, UTS, UNC, UNS, and UNF bolts). Finally, 20 is the length of the bolt in mm, measured from the tip of the thread to the bottom of the head (with the exception of oval headed bolts). Taper taps are often used to create new threads in materials and are ideal for tougher material such as steel, allowing for a gradual and smooth tapered cut. One of the most common ways to produce the thread holes is to drill a hole of the right size with a drill bit and tap it with a tap.

RS PRO straight flute, taper taps are available in a range of sizes from M2 to M20, offering a wide choice to suit various tasks. Drilling is a process of producing a hole while tapping is a technique used to cut a thread inside a hole, so the drill bit and tapping tool are often used in sequential to fabricate CNC parts with thread holes. Hand tap sets are hand tools designed for thread cutting in holes into various materials such as steel allowing you to create a smooth and precise thread for bolts and other materials.They also feature a blue stream tempered finish helping to reduce friction and produce a cleaner thread. The tap size chart is a table that lists standard size taps, specifying the diameter and thread spacing, for fractional, metric, and screw sizes.

As a consequence the development of taps corresponded to this standardisation ensuring enhanced compatibility. In the fractional and screw size systems, the thread count is used, measured in threads per inch, such as UNF threads and UNC threads. The sets include the 3 most common types of tap including a taper tap, second tap and bottom tap, allowing you to carry out a range of tapping tasks from starting a new thread to cutting a straight thread as soon as the tap enters the hole. The data chart below shows the standard metric ‘coarse’ threads and their drill holes sizes were are most commonly used when tapping sheet metal fabrications. Introducing HSS metric hand tap sets from our trusted own brand RS PRO, a range of sets with tools ideal for cutting thread into material such as metal bolts.The metric system uses the thread pitch, which is the distance between threads, measured in millimeters. Number drill bit sizes: the sizes are indicated in numbers, range from size 80 (the smallest) to size 1 (the largest). However, the bottoming tap cannot start the threading on an uncut hole, so it can only take part in the cutting process as the second or third tap.

To create a thread properly, one would need a set of three taps that correspond to the same bit size; namely the bottoming, the intermediate, and the taper tap. A rule of thumb is that the right tap drill is around 85% for coarse threads and 90% for fine threads which feature a higher number of threads per axial distance.Some prefer to use somewhat arbitrary but reliable formulas like: “Dtap = Nominal Diameter – Thread Pitch”. The taper tap features a smooth diameter transition that allows for a less aggressive cutting action. The drill size chart is a table list standard size drill bits in several measurement systems, including fractional, metric, wire gauge number, and letter.