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Drill Size Decimal eQUiValent tap Size 80 .0135 1 79 .0145 64 .0156 78 .0160 77 .0180 76 .0200 75 .0210 74 .0225 73 .0240 72 .0250 71 .0260 70 .0280 69 .0292
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STARRETT LITERATURE. Scroll down to order other printed items, such as decimal wall charts, posters, handbooks, and decimal equivalent cards. Browse each of our catalogs by page, or download the catalog in a PDF format.
Inch/Metric Tap Drill Sizes and Decimal Equiv alents Wall Chart Suited for factory-machine areas and tool cribs, as well as classroom use. Charts are packed one per tube.
Feb 1, 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.
- Thread Depth (Height) in Tapping Explained
- Calculation Examples
- Tapping Technologies
- Tap Dill Size Chart
The distance between the crest and root is called the thread height. The thread standards define the maximum thread height and are the same for metric and inch threads. In tapping, it is customary to express the thread height (Sometimes called thread depth) as the relation in percentage between the actual depth and the maximum depth. 1. A larger Th...
Calculating Tap Drill Size for M8 X 1.25 (Metric Thread) Calculating Tap Drill Size for UNC 1/4-20 (InchThread) 1. The above examples are for cutting taps.
Forming Taps
Advantages of Forming Taps (Compared with cutting taps): 1. The cycle time is shorter due to higher cutting speeds. 2. Better uniformity and accuracy of the thread. 3. A higher strength of the thread (Due to internal stress created by the forming process). 4. No chips are formed, therefore there is never a chip evacuation issue. Disadvantages of Forming Taps (Compared with cutting taps): 1. They can be used only on ductilematerials such as aluminum, brass, copper, 300 series stainless steel,...
Unified Inch Threads (UNC/UNF/UNEF) Tap Drill Size Chart
Tap Drill size per thread height (In percentage) 1. Press ⊕to view all Width (55%-85%).
Metric Tap Chart Tap Drill Clearance Drill Aluminum, Brass, Plastics Steel, Stainless Steel, Iron Close Fit Standard Fit 75% Thread 50% Thread Screw Size ...
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This document provides information on drill sizes and their decimal equivalents for metric and imperial taps. It lists various drill sizes in 64ths of an inch along with their decimal equivalent. For each drill size, it also lists the corresponding metric or imperial tap size.
