The major minus pitch also works for inch-based threads, but you must first determine the pitch by looking at the number of treads per inch (TPI; for example, 1⁄ 20 = 0.050 and 1⁄ 13 ≈ 0.077), and your result will only land near a tap drill size (not directly on one). a b c d e "Tap Drill Sizes for Universal and M-Profile Screw Threads". precisiontwistdrill.com . Retrieved 4 August 2006. {{ cite web}}: External link in |work= ( help) The M10 tap drill size is a standard used for machining threads. It is defined as the major diameter of the thread in millimeters minus the pitch of the thread. The M10 tap drill size is used for both metric and imperial units of measurement. The taps used to create the threads are also marked with the M10 designation. The M10 tap drill size is generally used for holes that are 10 mm in diameter. If you’re someone who likes to do things yourself, then you know that having the right information is critical. That’s why knowing the M10 tap drill size is important – it’ll help you get the job done right. In this blog post, we’ll explain what an M10 tap is and give you the drill size so you can get started on your next project. Let’s dive in. What is the M10 Tap Drill Size?

High performance taps" (PDF). guhring.com . Retrieved 7 October 2010. {{ cite web}}: External link in |publisher= ( help) The drill sizes that are near this are 25⁄ 64 (0.391 in; 89.4%), 10mm (0.393 in; 90%), and letter X (0.397 in; 90.8%); any of these will work well. Theoretical percentage of thread should not be relied upon for threads of included angles other than 60 degrees. The table below shows the drill hole sizes for standard metric (coarse) threads and metric fine threads. Metric & Metric Fine Tap Drill Chart Ø

This size can also be used for threads that are finer than those made with an M12 tap drill size. The main advantage of using an M10 tap drill size is that it allows for a more precise thread to be produced. In addition, it produces less wear on the taps themselves. Which Drill is Used for Tapping 10 mm Tap? Smaller than M4 you readily risk breaking taps in your workpiece (taps are harder than drill bits, so this might mean you've ruined your workpiece). Example (metric, coarse): For M7.0×1.0 (an intended screw with a diameter of 7.0mm and a pitch of 1mm between each thread, which is considered coarse), 7.0 mm × 0.85 = 5.95 mm.

A good tap drill is 85% (± 2 pp) of major diameter for coarse threads, and 90% (± 2 pp) of major diameter for fine threads. [1] a b c d e "Tap Drill Sizes and Calculator". newmantools.com . Retrieved 4 August 2006. {{ cite web}}: External link in |work= ( help) There are alternatives threads to metric threads, such as UK imperial threads, the US has a different set of imperial threads, there are special Model Engineer threads, special Cycle threads. Pipe threads are common (though beware, the diameters of pipe threads refer to the internal diameters of the pipe, not the outside diameter of the thread) as are BA (British Association) threads. Keep turning until the depth of thread is achieved, there should be no resistance once the cut has been made level and squre to the rod The tap drill size for the M10 1.5 pitch is 8.5 mm. This is the size of the hole that will be created when using a tap with this drilling speed. It is important to note that this number will change depending on the specific tool being used and the type of metal being drilled. For example, stainless steel [ 1] will require a different size tap drill than carbon steel. ConclusionBelow is a comprehensive drill and tap size chart for all drills and taps, imperial and metric, up to 36.5 millimetres (1.44in) in diameter. M4, for example, means the "standard" M4 thread size: for a bolt, the outside of the thread would be 4mm in diameter, and the spacing between threads (the pitch) would be 0.70mm.

For both of these rules of thumb (85%/90% and major minus pitch), the tap drill size yielded is not necessarily the only possible one, but it is a good one for general use. Keep turning until all the way through the material and most of the way through the thread, there should be no resistance once the cut has been made the full distance through the material when turning in or out using the tap wrench. The drill sizes that are near this are 15⁄ 64 in (85%), 6.0mm (85.7%), and 6.1mm (87.1%); any of these will work well. a b c d e "Tap & Clearance Drills For Common Screws". Small Parts Inc. Retrieved 7 October 2010. {{ cite web}}: External link in |work= ( help) [ dead link]

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There are 'non-standard' M4 thread forms, which will have different pitches, which are incompatible with standard M4. For example M4x0.5mm. This would be referred to as "M4 fine", but some people would refer to any M4 pitch less than 0.70mm as M4 fine, so take care! Some prefer to use somewhat arbitrary but reliable formulas like: “Dtap = Nominal Diameter – Thread Pitch”. This formula works for both metric and imperial units, and for all 60-degree threads (all ISO, DIN, UTS, UNC, UNS, and UNF bolts). The first tap drill chart below is in mm and the next in inches. Both are available as a printable tap drill chart PDF as well. Tap Drill Chart (mm and inches) Once through the material using this tap repeat the process using the tap with 2 grooves and then finally again using the tap with no grooves.

Example (metric fine): For M7.0×0.5, major minus pitch yields 6.5, which at 92.9% happens to be an example that pushes over the outer bound of the 90% ± 2 pp, but major minus pitch is still valid, although smaller drills (6.3mm, 1⁄ 4, 6.4mm) will work well. The 85% and 90% rules works best in the range of 1⁄ 4–1in (6.4–25.4mm), the sizes most important on many shop floors. Some sizes outside that range have different ratios. The result is 4.0 mm - 0.8444 mm = 3.1666 mm, which is the necessary diameter for the drilled hole. Based on the desired nominal size, look at the desired standard column to determine the minimum outside diameter of the component for the threads.

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A dull bit can cause the tap to slip, leading to an uneven or damaged thread. For best results, use a new or freshly sharpened drill bit when tapping 10mm holes. What is the Tap Drill Size for the M10 1.5 Pitch? Regarding the proportion of tap drill to thread major diameter, for standard V threads ( ISO V thread and UTS V thread), there are several rules of thumb with strong predictive power: People frequently use a chart such as this to determine the proper tap drill for a certain thread size or the proper tap for an existing hole. a b c d e "Tap Drill Sizes". widell.com. Archived from the original on 14 November 2006 . Retrieved 1 September 2006. {{ cite web}}: External link in |work= ( help) a b c d e "Continuous Drill Bit Sizes". Archived from the original on 19 July 2006 . Retrieved 29 August 2006.