There’s a message at the begging that states “pause video as needed”. It’s there specifically for people like you who are “fast” readers.

haha, same here!

No problem, thanks for watching!

Glad it was helpful!

I have other videos with me talking, we do both visual 3D animations and others with me teaching "in person". Hopefully you can find some with music you like. Thanks for watching!

@@Machining-tutorials The best music is no music.

@@12345NoNamesLeftthat explains why I drive home in silence time to time 😂

By setting three jacks to zero, you create a reference plane. As you scan the entire face from this plane, identifying all highs and lows, you accurately measure the surface's flatness. This method ensures consistency; regardless of how you might reposition the jacks and establish a new plane, the maximum deviation found-the total flatness-remains the same. Essentially, no matter where the jacks are placed, as long as they're zeroed to form a plane, your measurement of the surface's maximum deviation (its flatness) will always be consistent and reliable.

@@Machining-tutorials There definitely seems to be something missing. For example setting the three jacks very close together could give a much greater deviation on a point much farther away... although no sane person would think of doing that. Probably though if the jacks are at the edges the difference would be minimal anyway

Exactly! Measuring within the area defined by the three jacks, especially when they're placed towards the edges of the part, ensures greater accuracy. This practice minimizes potential deviations that could occur if measuring outside this area. Positioning the jacks near the edges is indeed good practice, as it provides a stable and representative base for assessing the entire surface's flatness. Thanks for the question. I might pin this to the top to hopefully further explain this process. Ill cover this with an actual example and link to this video to help others. Basically stay within the jack parameter for more accuracy. @@jercki72

The pitch and the pitch diameter are 2 different things.

There are so many more, we will include pipe threads in the future too. Thanks and noted!

Thanks for the clarification! You're right, "Imperial" is the correct term for the system, and "inch" refers to the unit of measurement within it. I appreciate the insight and will keep this distinction in mind for future discussions.

The 60-degree angle you're seeing is actually the standard set by William Sellers in the 1860s, which deviates from the previously established 55-degree Whitworth thread. Sellers introduced a thread with a 60-degree angle and flat crests and roots, aimed at simplifying manufacturing and improving efficiency. His design was adopted in the United States and laid the groundwork for the Unified Thread Standard we often use today. So, while the Whitworth thread is 55 degrees, the standard for many inch-based threads, especially in the U.S., is indeed 60 degrees due to Sellers' innovations.

Both Metric and standard are 60 degrees. Whitworth threads started this at 55 degrees but the industry wanted to make it easier and Im sure if you do a deep dive in google it will unlock the history of why these decisions were made.

Sure! BA (British Association) threads are fine, precision threads notable for their 47.5-degree angle and rounded profile, designed for tight fits in instruments and models. The pitch decreases as the number increases (0BA is largest, 22BA is smallest), allowing for precise adjustments. Although less common today.