Machinist Kalc Programs

Using Common Angles and Standard Pins to Calculate Gibs and Dovetails In this PDF download , you will receive standard pin diameters in fraction and decimal form from 3/64 inch (0.04688) to 2inches (2.000) for 45- and 60-degree angles for E, F, and G. Thanks for visiting www.MachinistKalc.com today. These tips are some of the best tools a machinist can have. I also have more Machinist Tips available. 

Troubleshooting Drill Problems If you’re doing a lot of drilling and you’re running into a few problems, I think you’ll like today’s tip. Some common problems you will run across with drills is the breakdown of outer corners, rough holes, oversize holes, and more. Download this general troubles and causes sheet to keep in your toolbox so you can correct your problem and get back on track quickly. Thanks for visiting www.MachinistKalc.com today. I hope you find these tips to be helpful tools .

Can you imagine a world without threaded  nuts and bolts? When you think about it, almost everything in the world is held together by nuts and bolts - vehicles, homes, bridges, chairs just to name a few. You could say that our lives are literally hanging by a thread.  Of course, threads are used in other materials as well such as pipes. And threads come in different pitches; some are standard and some are metric; some are internal and some are external. And it's a machinist's job to make sure these threads are precise for the jobs they must perform. So, as a veteran machinist with over 40 years of experience, I have posted a few thread tips and created some GraphNCalc83 programs to help you double check your calculations for external pipe threads , internal pipe threads , and for diameter calculation  over three-wires of 60 degree threads. Image courtesy of  Dan Cristian Pădureț via Unsplash I'm so glad you visited www.MachinistKalc today. Be sure to sign up for ...

A hexagon, as mentioned in a previous post , is often used in nature due to its amazing strength. One of the earliest hexagonal written thoughts dates back to 36 BC when Roman polymath, Marcus Terentius Varro, reported that the hexagonal shape makes the most efficient use of space and building material. (Source: Wikipedia ) From that point, builders and manufacturers have been busy as bees using the hexagon to build their man made creations.  Image courtesy of   Meggyn Pomerleau With that being said, a machinist often uses two of history's genius hexagon inventions - hex nuts and bolts with hex heads. These handy fasteners allow for an excellent grip without slippage when tightening. As machinists, we also make plenty of hexagons in our career. That's why I decided to revisit my hexagon tips  and GraphNCalc83 programs I created to calculate a  hex angle , hex point 1 , hex point 2 , and  diameter calculation for hex and square. My coworkers and I use...

As with all of the downloads I provide as helpful tools on this site, this Mill and Lathe  Formulas chart  is handy to keep nearby. This chart provides formulas for SFM cutting speed, RPM, FPR, FPT, MRR, converting IPR to IPM and IPM to IPR, and much more as shown in the picture below. It also includes conversion formulas for inches to metric and metric to inches. I'm always happy  email  the chart to you if you're unable to download it.  Thanks for visiting www.MachinistKalc.com . And remember to tell your friends about our affordable programs and free downloads. 

Today's download is a  Tapping and Threading Formulas chart. You'll get formulas for inch taps as shown in the image below as well as for metric taps, and also two examples of tap drill size calculations for both inch and metric. This  helpful chart is a must have for any machinist. Keep it on your phone or print it to keep in your toolbox. Contact me if you're unable to download the chart; I'll be happy to email it to you. Thanks again for visiting www.MachinistKalc.com . Have a nice day.

Today's tip is a chart for Pipe Thread Sizes  that you can download free of charge. This chart provides the Tap Thread Size, Approximate Inside Diameter, Approximate Outside Diameter, and Tap Drill Size of the most commonly used standard threaded pipe sizes. Find out more information about charts and other tools you should keep on your phone or in your toolbox for easy accessibility. Contact me if you have any trouble downloading this chart. Thanks for visiting wwwMachinistKalc.com today. 

Today, I'm offering a PDF download of a Metric Taps conversion chart. See the sample image below that shows the conversions that are available in this download. If you're unable to download this helpful tool , please contact me . I'll be happy to email the file to you. 

The second free chart that I'm offering as a December 2021 tip is a millimeter to inch chart. This is a free download that you can print to carry in your wallet, to place in your toolbox, or to snap a photo of it - or download it - to your phone for a quick reference. The chart ranges from .01 to 25.4 millimeters or .4961 inches to 1 inch. I'm also happy to email the chart to you if you contact me . I have a created a GraphNCalc83 millimeter to inches calculator program if you need to convert larger numbers from millimeter to inches and vice versa. Thanks for visiting www.MachinistKalc.com . Millimeter to inch chart

The first December tip for 2021 is a free download for a Degree Formulas chart. The chart shows you the simple equations to convert minutes of a degree as well as minutes and seconds to a decimal. It then shows you the equation to convert decimal degrees to minutes as well as minutes and seconds. If you have problems downloading the file, please contact me , and I will be happy to email the file to you.  You can keep this in the top of your toolbox, in your wallet, or just snap a picture and keep it on your phone for quick reference. This is one of the machinist tools you should keep close at hand. Thanks for visiting www.MachinistKalc.com . Degree Formulas Chart  

Download this PDF of a Decimal Equivalent Chart  to your iPhone or print it out and put it in your toolbox to be able to quickly find the decimal equivalent of common drill and tap millimeter sizes. Decimal sizes range from .0059 - .0980. Contact me if you prefer that I email this chart to you. This is a highly recommended tool for any machinist to keep nearby. Decimal Equivalent Chart for Drill and Tap Sizes

Download your PDF and Excel copies of this thread data today! The files you are downloading include an Internal/External Thread Chart in Excel format and a Thread Calculations form in PDF format. If you have trouble downloading these files, feel free to contact me , and I will be very happy to email these two files to you. Thanks for visiting www.MachinistKalc.com today. Read more about why we provide these helpful tips each month. 

Coordinate Constants from Center: These are used for establishing coordinate hole locations from the center location of a bolt circle with equally spaced holes. The holes can be aligned to a reference point on a center-line or equally spaced on both sides of the centerline. To use these values, first, select the required number of holes for the bolt circle and choose the appropriate type of coordinate reference location (either on the centerline or between the holes). Then, multiply the diameter of the bolt circle by the constant values shown in the chart. (Be careful to notice the plus (+) and minus (-) value for each constant). The resulting answers represent the coordinate locations and directions of the holes from the "X" and "Y" center reference points for the specified diameter of the bolt circle. Download the full PDF, which includes coordinate constants from center for 3 to 12 holes. Contact me if you would like for me to email the full PDF to you instead....

Area & Measurement of Plane Geometric Figures: You can download these handy formulas for Plane Geometric Figures . Covered are Circles, Ellipse & Parabolas, Cylinders, Spheres, Squares, Rectangles, Triangles, Parallelograms, Trapezoids, Trapeziums, Hexagons, Octagons, and Regular Polygons. You may also  contact me if you want me to email the full PDF to you that includes all of these formulas.  Sample: Hexagon and Octagon formula Thanks for visiting www.MachinistKalc.com today. Learn why we list new tips every month. 

TAPERS: Machinists often turn, plane, bore, and grind tapers on a variety of parts, therefore, it is important to be familiar with the common standard tapers—American National Standard, Brown and Sharpe, Morse, and milling-machine arbor and spindle. How to determine the taper per inch or percentage of taper from a sample piece of work is a common problem. A study of the data and the rules in this section will help you handle taper problems. Taper Calculations: A cylindrical taper is a piece of material that decreases in diameter in a cone shape. Proportions for tapers are often expressed as Taper per Foot (TPF), or Taper per Inch (TPI). Taper calculations are most often expressed in terms of the difference in diameter at the opposite ends of the taper and the length of the taper center axis. Contact me if you would like for me to email the full PDF with all of the taper calculations to you. You may also download the Tapers PDF. Thanks for visiting www. MachinistKalc.com today. The m...

Coordinate Constants from Outside: These are used for establishing coordinate hole locations from the outside of a bolt circle with equally spaced holes. The holes can be aligned to a reference point on a centerline or equally spaced on both sides of the centerline. To use these values, first, select the required number of holes for the bolt circle.  Next, choose the appropriate type of coordinate reference location (either on the centerline or between the holes).  Then, multiply the diameter of the bolt circle by the constant value shown in the chart.  The resulting answers represent the coordinate locations of the holes from the "X" and "Y" reference edges for the specified diameter of the bolt circle. The full PDF  can be downloaded and includes coordinate constants for 3 to 12 holes. Contact me if you prefer that I email this to you instead. Sample: Coordinate constants from outside for 4 holes Thanks for visiting  www.MachinistKalc.com  today. These t...

These charts have pre-determined sizes and also the formulas to find the Distance Across Corners of Hexagons and Squares . Although Octagons are not included in this PDF, I have listed the formula below for that as well. Download at the hyperlink above or  Contact me to receive the full PDF. It's free! Sample of PDF you will receive Hexagon:  D = Distance across Corners d = Size of Hexagon Formula: D = 1.1547d Square: E = Distance across Corners d = Square Size Formula: E = 1.4142d Octagon: O = Distance across Corners d = Size of Octagon Formula: O = 1.082d Thanks for visiting  www.MachinistKalc.com  today. I'm pleased to provide one or two new helpful tips for you each month.

  Image courtesy of HandToolEssentials.com Click on the picture to see the quick reference guide. Visit HandToolEssentials.com to know how to choose the right drill bit for your next project. Thanks for visiting www.MachinistKalc.com today. These  machinist tips I provide each month are great to keep in your toolbox or to pull up on your phone for quick, helpful information.

This is a quick two-page download that contains Formulas for Circles and Spheres . It contains 14 formulas for Circles and Spheres and is good to have in any Notebook for quick reference. Formulas include how to find the circumference of a circle, how to find the diameter of a circle, how to find the area of a circle, how to find the surface of a ball (sphere), how to find the cubic inches (volume) of a ball, and more! Properties of a Circle image is also included in the PDF file. I have provided a sample image below of the first two formulas that are included in the PDF. Contact me if you would like me to email the full PDF file to you. Sample image of the PDF file you will receive Please check back frequently for more machinist tips on www.MachinistKalc.com . Some of the best tools of this trade are the charts that you keep nearby. 

This is just a quick PDF on Decimal Equivalents. A sample image of the Table of Decimal Equivalents of 8ths, 16ths, 32nds, and 64ths of an Inch is shown below.  This PDF is easy to download and print, making it easy for you to put it at your machine so you don't risk losing the good plastic ones! Contact me if you would like me to email the full PDF file to you. a small sample of the PDF you will receive Thanks for visiting  www.MachinistKalc.com  today. Keep this chart nearby to find powerful decimal equivalents.