wow wow, spur, spur..brao...very well explain and very easy to understand and grab it to brain. Never forget that, calculation, Pitch, Flank; Crest, Root, Nominal-Major-Minor diameter, hypothenuse, adjacent..etc..everything includes..luxuary lession.
What the most comprehensive explanation I ever saw for thread calculations and with details. I really like it most. Thanks a lot and please, keep sharing your amazing skills with us. Perfect!!
We needed help so we could best convey correctly some thread discussion in a coming up video to best share, you shared great information we thank you we needed the metric pitch relation. Lance & Patrick.
thread making was so horrible for me on machine or even in solidworks that i mostly avoid the jobs with thread. but you explained every part so detailed that i will never going to let any threading job go now.My THREAD CONCEPT is CLEAR now. you are an awesome teacher. i surly see you in person some day. :) thankyou so much.
Thank you very much for your clear lesson, i'm a lathe player, and so far i threated without a clear idea of nominal or major diameter, and so on. What about internal threadings ? Which is the diameter to be achieved before beginning threading itself, and how much should be its deep ? H/4 and H/8 are still valid target ? Thank you very much.
Fantastic. At last someone to whom I can ask a question: I've never 100% understood thread manufacture but I get acceptable results from Machinery's Handbook using the major and minor diameters and their tolerances but I'm unsure about the importance of pitch diameter: I know what it is, I'll know its values, but what do I do with it? Also,a rule of thumb for tapping drill sizes is nom dia minus *pitch*. Could you explain the relationship here please?
What happens to the pitch (consideration) when you have a multi-start thread? I know that technically it is the same but how do you calculate the depth of cut?
Like the video and could follow what you were showing. My question is actual cutting of the threads. The tool is typically 60 degree pointed so I am getting confused on the root area. If cutting stops at the value of root truncation, the tool point stops there as well, so how is the root flat area formed? It would seem the cut would have to extend all the way down up to the actual root diameter to get proper threads. The thread outer edge crest could be turned down before or after threads are formed.
Threads a 99% rolled = metal is deformed between 2 thread dies with progressively deeper threag pattern like wet noodle spun between fingers. Cutting comes close, too. Either way, near perfect threads are formed.
So, for instance, I cut a thread on the lathe. It was for a 7/16-20 thread. The nominal outside diameter was 0.4375, but after cutting my thread the outside diameter was 0.420. So I suppose then that the truncated points of the threads are what caused the reduction of my outside diameter. Am I correct assuming this? Thanks, Tom
Quick estimate 0.4375 - (sin60x1/20/4) = 0.4266 OD after truncation, rough estimate, rolled thread forms have a rounded truncation, not a fltat top, so 0.427 is a reasonable final diameter. Depending on instrument precision, 0.420 is close enough, leaves enough metal for thread engagement.
Good video,but. Sir. Now to select a tap or drill for M20x2.5 bolt 🔩 What is the formula,we will take ore than 20 mm or less than 20 mm? Kindly explain. Thanks
Can you help. So, lets say I have TWO extruded bossed cylinders which both have 1.250 OD with 1.000 ID hole though all. So, left to work with is (.250 / 2)= .125 wall thickness. So now I need threads (female and Male to screw both tubes together) , also I need at least (.125 / 2) = .0625 wall thickness (which is sturdy enough for ABS 3d printing material) How do go about calculating the male and female threads?
Just a question. Why use half the included angle and not the full 60°? Is not the triangle formed by joining the peak to the base at 90° just as valid. Then the formula would be h=p x sin 60°. Or h= sin 60° / TPI for US Customary. Not a criticism of your presentation at all, just voicing a long held question on this.
I think using a 127 teeth gear could be possible, i bought one for my metric lathe ; the module of such a gear must be the same of others already running in the lathe : my gears are modulo 1 , and so i bought a 127 teeth gear, modulo 1. Now i have to fix this 127 gear in the lathe, but this is another story . . . In the meanwhile i use a " low error" gear set : instead of 25,4 mm as an inch, i get 25,3846 . . . , with an error of 0,06 per cent. ( surely NOT OK for very long screws . . . ) First i founded two numbers whose quotient was near 25,4 or - better - 2,54 that is a tenth of an inch. I worked a bit, but finally i found 66 and 26 . In fact 66/26 is 2,53846 . . . ( no other number are possible, it's no possible use decimal gears . . . ) Then i had to correct the pitch of the main screw of my lathe, that is 1,5 mm. So i got ( 44/26 ) x 1,5 whose result is 2,53846. Any additional equal gear can be applied ; they - if equal, suppose 50 and 50, or 40 and 40, ( and so on ) - don't affect the pitch. Doubling or changing ratio between two added gears can be usefull to get multiple or submultiple values of on tenth of an inch. I got the gears, 44 and 26 teeth from "RS components", but they can be found elsewere. I had to lathe them a bit to achive my lathe mechanics, but at the end they were ok. Then . . . cutting Whitwhort screw is an other story, i got some usefull results, but some teoric lessons could be very usefull . . .
Applicable to ISO and UTS 60-degree threads where thread depth is ABOUT 75% due to that 60-degree equilateral triangle and thread truncation. Pipe threads, Whitworth, buttress, microscope, ACME, light bulb bases, hydraulic hoses have completely different thread angles, pitches and thread truncations.
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wow wow, spur, spur..brao...very well explain and very easy to understand and grab it to brain. Never forget that, calculation, Pitch, Flank; Crest, Root, Nominal-Major-Minor diameter, hypothenuse, adjacent..etc..everything includes..luxuary lession.
Well explained sir! You're very effective at teaching students to fish!
What the most comprehensive explanation I ever saw for thread calculations and with details. I really like it most. Thanks a lot and please, keep sharing your amazing skills with us. Perfect!!
Glad it was helpful!
Thanks, cleared up the practical view of threads.
Finally a good explanation of thread pitch and height.
Thank you for this informative video. You have presented this topic in an easy to understand manner. Thank you once again for your efforts.
Love from india 🇮🇳 sir🙏
Thank you so much! excellent video! awesome teacher!
We needed help so we could best convey correctly some thread discussion in a coming up video to best share, you shared great information we thank you we needed the metric pitch relation. Lance & Patrick.
wow, that was great, thank you so much!
@apprenticemath... Thank you. This video makes perfect sense. A must see for all.
Im not an ingeeneer but I understood perfectly this explanation thsnks a lot guy you really teach to the world!!!
Cheers, mate!
I have no words other than thank u from deep heart. this video is extremely helpful for my. thanks for ur efforts making this video.
Great video. I need to create a 3/4 -32 thread for a cad model, & I believe this will enable me to do it.
Thanks for watching!
thread making was so horrible for me on machine or even in solidworks that i mostly avoid the jobs with thread. but you explained every part so detailed that i will never going to let any threading job go now.My THREAD CONCEPT is CLEAR now. you are an awesome teacher. i surly see you in person some day. :) thankyou so much.
Asad Kazmi Thanks for watching and sharing your story.
Asad Kazmi : Hey buddy please help me to get DESIGN JOB please help ?? What should I do ?
Greatest explanation ever about this topic. Good job, sir!!
Wow, thanks!
Many many.... many thanks 👍👍👍
Very clear. Thank you sir.
The best explanation of metric thread dimensioning!! Thank you.. Just curious about internal thread geometry, is the same applicable?
Could you do the calculation for the 3 wire approach please? 😀
Thank you very much for your clear lesson, i'm a lathe player, and so far i threated without a clear idea of nominal or major diameter, and so on. What about internal threadings ? Which is the diameter to be achieved before beginning threading itself, and how much should be its deep ?
H/4 and H/8 are still valid target ? Thank you very much.
Fantastic. At last someone to whom I can ask a question: I've never 100% understood thread manufacture but I get acceptable results from Machinery's Handbook using the major and minor diameters and their tolerances but I'm unsure about the importance of pitch diameter: I know what it is, I'll know its values, but what do I do with it?
Also,a rule of thumb for tapping drill sizes is nom dia minus *pitch*. Could you explain the relationship here please?
What happens to the pitch (consideration) when you have a multi-start thread? I know that technically it is the same but how do you calculate the depth of cut?
If it`s the same 60-degree thread, same math applies.
Like the video and could follow what you were showing.
My question is actual cutting of the threads. The tool is typically 60 degree pointed so I am getting confused on the root area. If cutting stops at the value of root truncation, the tool point stops there as well, so how is the root flat area formed? It would seem the cut would have to extend all the way down up to the actual root diameter to get proper threads.
The thread outer edge crest could be turned down before or after threads are formed.
Threads a 99% rolled = metal is deformed between 2 thread dies with progressively deeper threag pattern like wet noodle spun between fingers.
Cutting comes close, too.
Either way, near perfect threads are formed.
Thank you.
please explain and how to calculate the threading depth, pitch,spindle speed and feed
thread depth: th-cam.com/video/B-zUS2AZDQk/w-d-xo.html
pitch: th-cam.com/video/crw77GuZ3PA/w-d-xo.html
to get you started
So, for instance, I cut a thread on the lathe. It was for a 7/16-20 thread. The nominal outside diameter was 0.4375, but after cutting my thread the outside diameter was 0.420. So I suppose then that the truncated points of the threads are what caused the reduction of my outside diameter. Am I correct assuming this? Thanks, Tom
Quick estimate 0.4375 - (sin60x1/20/4) = 0.4266 OD after truncation, rough estimate, rolled thread forms have a rounded truncation, not a fltat top, so 0.427 is a reasonable final diameter. Depending on instrument precision, 0.420 is close enough, leaves enough metal for thread engagement.
Thank you so much sir🙏
Most welcome
Good video,but.
Sir.
Now to select a tap or drill for M20x2.5 bolt 🔩
What is the formula,we will take ore than 20 mm or less than 20 mm?
Kindly explain.
Thanks
Can you help. So, lets say I have TWO extruded bossed cylinders which both have 1.250 OD with 1.000 ID hole though all. So, left to work with is (.250 / 2)= .125 wall thickness. So now I need threads (female and Male to screw both tubes together) , also I need at least (.125 / 2) = .0625 wall thickness (which is sturdy enough for ABS 3d printing material)
How do go about calculating the male and female threads?
If I extrude cut one pipe end to too 1.250 OD - .125 = 1.125 OD ( say 1 inch thread ) now I want apply threads for assembly of the two pipes.
how to calculate depth in screw thread?
I think this was stated in the video; I believe it's H/4
www.evernote.com/l/AEgA1ISC621Oj47swmhuo6R_4SU5FNiL7u8/
What is the flank angle and where can I find it?
For M5 bolt
60 degrees included, 30 degrees from vertical. Thread standards, listed as ISO metric 60-degree thread.
Just a question. Why use half the included angle and not the full 60°? Is not the triangle formed by joining the peak to the base at 90° just as valid. Then the formula would be h=p x sin 60°. Or h= sin 60° / TPI for US Customary. Not a criticism of your presentation at all, just voicing a long held question on this.
how to make British Standard Pipe Thread (Whiteworth) ? its 55 Deg not 60
Asad Kazmi If your lathe is made to match that thread pitch precisely it is possible, otherwise not really.
I think using a 127 teeth gear could be possible, i bought one for my metric lathe ; the module of such a gear must be the same of others already running in the lathe : my gears are modulo 1 , and so i bought a 127 teeth gear, modulo 1. Now i have to fix this 127 gear in the lathe, but this is another story . . . In the meanwhile i use a " low error" gear set : instead of 25,4 mm as an inch, i get 25,3846 . . . , with an error of 0,06 per cent.
( surely NOT OK for very long screws . . . )
First i founded two numbers whose quotient was near 25,4 or - better - 2,54 that is a tenth of an inch. I worked a bit, but finally i found 66 and 26 . In fact 66/26 is 2,53846 . . .
( no other number are possible, it's no possible use decimal gears . . . )
Then i had to correct the pitch of the main screw of my lathe, that is 1,5 mm.
So i got ( 44/26 ) x 1,5 whose result is 2,53846. Any additional equal gear can be applied ; they - if equal, suppose 50 and 50, or 40 and 40, ( and so on ) - don't affect the pitch. Doubling or changing ratio between two added gears can be usefull to get multiple or submultiple values of on tenth of an inch. I got the gears, 44 and 26 teeth from "RS components", but they can be found elsewere. I had to lathe them a bit to achive my lathe mechanics, but at the end they were ok.
Then . . . cutting Whitwhort screw is an other story, i got some usefull results, but some teoric lessons could be very usefull . . .
Are these calculations only applicable to a standard 75% full thread?
Applicable to ISO and UTS 60-degree threads where thread depth is ABOUT 75% due to that 60-degree equilateral triangle and thread truncation. Pipe threads, Whitworth, buttress, microscope, ACME, light bulb bases, hydraulic hoses have completely different thread angles, pitches and thread truncations.
apprenticemath Understood. Thanks for the detailed response.
Respect sir,
Ask me questions?
eg. M16×2-6H
How to find Major diameter in metric thread profile
Please sir first consider to nominal diameter (16mm ) and find Major diameter
It's about:
Nominal diameter - (0.25 x cos30 x 2) = 15.5669 mm
But, answer 15.962mm
That's limit
Nominal diameter formula