BGS 1900-M10X1.25-B | Tap Set | Starter & Plug Tap | M10 x 1.25 mm | 2 pcs.

Product Information

A tap cuts or forms a thread on the inside surface of a hole, creating a female surface that functions like a nut. The three taps in the image illustrate the basic types commonly used by most machinists: Double-lead taps and insert taps need different speeds and feeds, and different starting hole diameters than other taps. Hand taps are widely used in metalworking, manufacturing, repair, construction, automotive, aerospace, electronics and other industries and for DIY projects to create internal threads in workpieces.

While modern nuts and bolts are routinely made of metal, this was not the case in earlier ages, when woodworking tools were employed to fashion very large wooden bolts and nuts for use in winches, windmills, watermills, and flour mills of the Middle Ages; the ease of cutting and replacing wooden parts was balanced by the need to resist large amounts of torque, and bear up against ever heavier loads of weight. As the loads grew ever heavier, bigger and stronger bolts were needed to resist breakage. Some nuts and bolts were measured by the foot or yard. This development eventually led to a complete replacement of wood parts with metal parts of an identical measure. When a wooden part broke, it usually snapped, ripped, or tore. With the splinters having been sanded off, the remaining parts were reassembled, encased in a makeshift mold of clay, and molten metal poured into the mold, so that an identical replacement could be made on the spot. Tap [ edit ] From top: Bottoming, plug and taper taps (US usage), or plug, second and taper (UK usage). Various taps. A tap and "T" wrench Various tap handles (wrenches).Hand taps are employed when there's a need to create threaded holes for screws, bolts, or other fasteners in a workpiece. They are generally used in situations where precision and manual control are crucial, such as in small-scale manufacturing, repairs, and projects where a power-driven tapping machine might not be suitable. Both tools can be used to clean up a thread, which is called chasing. However, using an ordinary tap or die to clean threads generally removes some material, which results in looser, weaker threads. Because of this, machinists generally clean threads with special taps and dies—called chasers—made for that purpose. Chasers are made of softer materials and don't cut new threads. However they still fit tighter than actual fasteners, and are fluted like regular taps and dies so debris can escape. Car mechanics, for example, use chasers on spark plug threads, to remove corrosion and carbon build-up.

A tap is used to make (cut) new threads or clean out (chase) existing threads in a screw mechanism. Though this tool is most commonly used by machinists and engineers, automotive technicians may also have a tapping set in their toolbox. There are dozens of situations where having a solid knowledge and appreciation for the science behind tapping threads into a piece of machinery can prevent hours of troublesome work and hundreds of dollars in replacement parts. Keenan, Julian Paul (2005). ASVAB - The Best Test Prep. Research & Education Association. ISBN 978-0-7386-0063-5. Metalworking taps and dies were often made by their users during the 18th and 19th centuries (especially if the user was skilled in tool making), using such tools as lathes and files for the shaping, and the smithy for hardening and tempering. Thus builders of, for example, locomotives, firearms, or textile machinery were likely to make their own taps and dies. During the 19th century the machining industries evolved greatly, and the practice of buying taps and dies from suppliers specializing in them gradually supplanted most such in-house work. Joseph Clement was one such early vendor of taps and dies, starting in 1828. [1] With the introduction of more advanced milling practice in the 1860s and 1870s, tasks such as cutting a tap's flutes with a hand file became a thing of the past. In the early 20th century, thread-grinding practice went through significant evolution, further advancing the state of the art (and applied science) of cutting screw threads, including those of taps and dies. Metric Tap and Drill Bit Size Table". BoltDepot.com. Archived from the original on 2006-11-10 . Retrieved 2006-12-03. To help with this alignment task, several kinds of jigs and fixtures can be used to provide the correct geometry (i.e., accurate coaxiality with the hole) without having to use freehand skill to approximate it:A die cuts an external thread on cylindrical material, such as a rod, which creates a male threaded piece that functions like a bolt. Dies are generally made in two styles: solid and adjustable. Tap & Drill Sets - A tap and drill set is an essential collection of tools designed to create threaded holes for bolts, screws, and other fasteners. These sets provide the necessary tools for tasks involving threading holes in materials like metal, plastic, or wood. where T D {\displaystyle TD} is the tap drill size, M D {\displaystyle MD} is the major diameter of the tap (e.g., 10mm for a M10×1.5 tap), and pitch is the pitch of the thread (1.5mm in the case of a standard M10 tap) and so the correct drill size is 8.5mm. This works for both fine and coarse pitches, and also produces an approximate 75 percent thread.