July 2023 Tip: Calculating Gibs and Dovetails

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 today. These tips are some of the best tools a machinist can have. I also have more Machinist Tips available. 

July 2023 Tip: Causes of Drill Trouble

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 today. I hope you find these tips to be helpful tools .

Revisiting Threads

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 GrafnCalc83 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 my month

Revisiting Hexagons

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 GrafNCalc83 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 these programs on a near-d

Update for External Pipe Threads Program

I have updated the External Pipe Threads Program for GrafNCalc83 to include 1/8-27, 1/4-18, and 3/8-18 pipe OD threads. The NPT OD threads GrafNCalc83 program now has 3 menus to better serve your needs as a machinist. Refer to the images below. #machinist #externalpipethreads #grafncalc83programs #pipethreads

Threads of Life

Threads on nuts, bolts, pipes, and other hardware and equipment hold our world together. And a machinist makes sure those threads are correct so everything will stay together longer. Threads make the use of our lathes, micrometers, as well as other machines and machinist tools possible. External male threads need internal female threads to mate or fasten objects together. The screw is made of two simple machines – the inclined plane and the wedge - so that it can move forward while also holding objects together so that the threads are unable to slip from their position. Image courtesy of FLYD The varied uses of threads, thread angles, ridge pitch, coarse and fine threads, thread depth and diameter, and other variations make each thread unique for its use. Each of these variations plays a major role in how the threads can be used without stripping. So, you can see how important it is to get your measurements correct when making these types of parts that require threads. Of course, I

June 2022 Newsletter

 GrafNCalc83 Chord Length Program My new Chord Length program is available for only $1.35. As always, I have tested it extensively to ensure it is accurate. I must continue to stress, however, that my programs are to be used only to verify your own calculations. You can buy all 34 of my programs for only $25 for a savings of $20.99. You may also choose 5 for $5 or 10 for $10 if you don’t need all 34 programs. Programs will be mailed within 48 hours of receiving your Paypal payment. If you have any questions before purchasing, please contact me . I’ll reply within 48 hours. Thanks for visiting . Have a nice day!


Nature uses hexagons because of the strength it provides. Also, of squares, equilateral triangles, and hexagons, the hexagon packs together more cells in one plane, using less space, than the other two do. In nature, the hexagon shape is found in tortoise shells, snowflakes, honeycombs, and bees’ nests. You’ll find many more examples if you care to inspect this further. If hexagons are good enough for nature, it’s good enough for manmade products as well. Engineers have been using the hexagon for their creations for hundreds of years. Some, like bridges, houses, and other buildings use this concept because of the strength and use of less space. Using hexagon shaped floor and wall tiles are other ways to not only use less space but also as an eye-appealing way to decorate. A soccer ball, made from hexagon and pentagon shapes, helps the ball maintain its shape as it’s being kicked around, improves the ball’s aerodynamics, and helps players maintain control (Source: https://soccerwhizz.

Buy All 34 Programs for $25

  DISCLAIMER Save $20.99 when you buy all 34 of our programs at one time. Just click on the Paypal button below.  Enter the email address you use on your iPhone in the "Notes" section of your payment. In less than 48 hours of you replying to our email, you'll receive all 34 programs. BUY ALL 34 PROGRAMS NOW FOR $25.00

Chord Length Calculator Program for GrafNCalc83

DISCLAIMER Chord Length: Is a program to calculate the Chord Length of any Diameter to get equal number of divisions. Input the Circle Diameter and then the number of Divisions. The output will be the "Chord Length". You will also get a PDF of the program. Use email account on your iPhone, open with GrafNCalc83. You should receive a message "Imported Successfully". Watch how this program works BUY NOW for $1.35: Please provide the email account you use on your phone in the "Notes" section of your payment. Program will be emailed to you within 48 hours of purchase - usually in much less time. Thanks for visiting today.