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February 2025 Tip: Metric and Standard Taper Pins

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Every machinist will eventually have to make or use taper pins. So, this month's helpful tip for you to download and print includes tables of metric and standard taper pins sizes. This download consists of 3 pages.  The metric table shows the metric diameter at the small end measuring from 1 to 20 millimeters and the length of taper pins from 10 to 150 millimeters. The standard table shows the diameter at the small end from .1306 to .6665 and the proper drill sizes to use. The standard table also shows the length of the pins from 1/2 inch to 5 1/2 inches. Sample of metric size chart Sample of standard size chart Thanks for visiting MachinistKalc.com .
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GraphNCalc83 App

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This app is one of the best things that has ever happened to the iPhone. The creator of the app, Ernest Brock, was very helpful and was always quick to respond to my questions. This is the number one app I use on my phone now. I have also provided a post with a video about how to import my programs onto your iPhone as well as the basic settings to use for my programs.  When you download the program from Payhip to your iPhone, browse to your downloads and tap it. It will open automatically in GraphNCalc83. You will get "Imported Successfully". Thanks for visiting  www.MachinistKalc.com  today.
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April 2025 Tip: Thread Dimensions, Shapes, and More

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This 18-page file  is a must-have for any machinist who works with threads. The image below is just the first page of what you'll receive in this highly recommended PDF.  What you'll receive in this PDF: Basic thread dimensions for coarse threads and tap drill sizes. Includes major, pitch, and minor diameters. Basic thread dimensions for fine threads and tap drill sizes. Basic thread dimensions for special thread pitches and tap drill sizes. Basic thread shapes. Constants used to find pitch and root diameters of screw threads. Class II screws and nuts pitch minimum and maximum diameter limits with threads per inch provided. Metric threads comparison chart. ISO metric and ISO inch thread form. Recommended metric series thread form. Metric formula to obtain tap drill sizes. 3-wire method to measure metric and American standard threads. American national pipe thread according to pitch diameter of thread at the end of the pipe and at the gauging notch, outside diameter of the pip...
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