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1 lut 2021 · 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.
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- Specifying Tap Drill Diameters
15 kwi 2021 · Tap drill size chart. For a more in-depth understanding on threads, please read our thread design and thread standards articles. The chart in Table 1 is used for tapping female threads into a component. Identify the screw designation, which correlates with the tap size on the chart.
Tap drill size calculator for Inch and metric threads (For Cutting and Forming Taps). Plus formulas and charts for Tap Drill Size.
Tap/Drill Size Chart - Unified & Metric. UNIFIED. TAP SIZE. DRILL SIZE. 0-80. 3/64 (.0469) 1-64. 53 (.0595)
Tap Drill Sizes for #1 - 64 UNC. If not specified, assume a thread depth of 75%. You can learn more about thread depth in tapping here. To get the tap drill size in other depths, use our Tap Drill Size Calculator . Thread Depth.
The complete chart of American Standard and ISO Metric thread sizes with corresponding tap drill sizes for accurate threading and machining. Easily find tap drill sizes in both inches and millimeters for various thread types.
Most tap drill charts call out only one tap drill size, and that will produce an approximate 75 percent thread. In general, tap tool life can be increased significantly by using a lower percent of thread and we suggest using values between 60% and 70% for most applications.
