Calculate Lathe Compound Angle To Turn A Taper

[@ashleychildress2121]

MR Lee your video was very well presented, very informative, I am 75 yrs old been a amateur machine operator and thought I was fair at math a long time. You sir, are a great instructor/teacher thanks for sharing your knowledge and expertise. You mentioned, at the last of your video, about making a bolt hole pattern identification video, please do so. We are in bad need of your knowledge and teaching expertise in our public schools. Thanks for making a great video.

[@cliffordfender1159]

I didn't know you were such a good teacher, Thanks !!

[@howder1951]

Thanks Lee, I enjoyed it very much. In fact I shall go to that taper page and calculate for some angle gauges for my mill. Cheers!

[@pweimer47]

Thank you for jogging my memory with this little lesson, I used MS Visual Basic 25 yrs ago to create multiple stand alone Calculator’s to compute a specific set of numeric values for a given job. Basically a short cut for those who didn’t want to do the math! Have a great day!

[@davidhaywood9071]

Your explanation less the programming was great. My pea brain won’t figure out why you use the whole length (5.5) and not what appears to be about 3/4 inches. Thanks Lee.

[@richardlamb5771]

Thanks, that was wonderfully done, I would appreciate more of this kind of content. I really enjoyed the glimpse into simple programing.

[@theundergroundesd]

Great video. I really liked the programming lesson. I'm going to download that program. Keep up the good work.

[@AmateurRedneckWorkshop]

One really good thing I learned was the iphone on its side thing. I did not know about that. I expect most people will use the online calculator. Thanks for the video.

[@josephgalea2921]

Thanks well done. I too should have pursued trig and Algebra when in school. I would dearly like to be able to convert trig values to both radians and degrees without the use of a calculator. that is a project for another time. I found you presentation stimulating and most helpful. have a great and safe day.

[@krisnewman3202]

Thank you Lee! We’ll done and clearly stated. Yes please, to the bolt pattern math video.

[@eddieblythe4813]

Great information

[@outsidescrewball]

Enjoyed…

[@311Bob]

You're right I'll never use it but I hated math in school because my teachers weren't, since I started watching machining ytubes I've become more interested be nice to find a Chanel that teaches practical math for fun

[@TrPrecisionMachining]

good video TBT

[@goptools]

Hi Lee, That was cool. It is always good to see a practical application of mathmatics we never thought we would use in the real world. I would like to see the bolt hole pattern video as well. I have used similar geometry to draw a 5 point star so I have somewhat of an idea for how it is done, but it would be good to see. Thanks for the video! -mike

[@memecastle9008]

Good vid uncle lee

[@rexmyers991]

Whew! Thanks, Mr Lee.

[@arfonjones7188]

Thanks, enjoyed the python programming.

[@garywickliff9102]

Very interesting and useful. Like you what math I had in school seems to have dwindled some. I really enjoyed Trig, algebra in school.

[@jamesmyers9898]

Yes, I would enjoy a video on positioning bolt holes.

[@peterc4450]

Enjoyed that, makes a change from watching chips being made or swarf as we say in UK

[@gregwmanning]

Thanks for following up with trig calculations. I can follow your explanations, python was quite interesting. Yes please for bolt hole calcs.

[@CraigLYoung]

Thanks for sharing 👍

[@danhoag373]

Yes please show me the bolt hole pattern! I have an old 5 lug bolt wheel with unknown diameter I really enjoyed this offering 73 Dan

[@BenButler1]

Thanks Lee!

[@marcw1867]

Very nice

[@glennfelpel9785]

This is good to know the angle you are needing and the explanation was very well done. But, given now that we know the angle how do you go about setting the compound accurately. The angles on my compound are not really fine enough to get any sort of an accurate angle. This would be something very interesting, to me at least, to know how to set fairly accurate angles on the compound slide. Thank you for the interesting video.

[@arfonjones7188]

Joe Pie does an excellent video on how to set the compound at a very precise angle.

[@glennfelpel9785]

@@arfonjones7188 Thank you I will go there and see how it is done. Much appreciated

[@outsidescrewball]

In thinking about how I would have solved, I would have subtracted the 1.5 from the 4, result divided by 2 which gave me a base for the right triangle and the 5.5 is the rise….since I don’t know arctan…lol

[@MrPragmaticLee]

Let's be honest, we'd probably both just use an online calculator 🙂

[@Radiotexas]

I did the same thing and came up with the same number (with an on-line calculator)! BUT... nice to know how to do it. Heck Lee, where's your slide rule??!?!?!

[@Quignal]

Very Good Id like to seethe math behind bolt hole patterns, I know how to do 6 holes but otherwise I'd have to do some head scratching

[@tomeyssen9674]

Fun fun. Thank you.

[@MegaRiffraff]

👍🏻

[@Dans-hobbies]

Hi Lee, If you do what @outsidescrewball said below, you get a triangle where you know 2 sides and an angle between them. Specifically you get a right triangle, so you can use the Pythagorean theorem to calculate the length of the hypotenuse. en.wikipedia.org/wiki/Pythagorean_theorem Once you know the length of the hypotenuse, you can use the Law of Cosines to solve for the half angle of the taper. mathworld.wolfram.com/LawofCosines.html Imo, the benefit of doing it using the above method is that once you know the length of the hypotenuse you have all the data needed to set or validate your compound angle very accurately with a dial indicator.

[@MrPragmaticLee]

Remember, the purpose of this video was to show the math used in various online calculators to compute the angle. It was never meant to be a practical approach. Thanks for stopping by.

[@Dans-hobbies]

@@MrPragmaticLee I know, I would just mentioning how i would most likely code it myself!