Marc, your presentation of the material is so dependable (and clear) that even the errors in the older version of the Machinery's Handbook get cleared up. My edition from 2008 shows correctly the FN4 and FN5 designations. What I want to point out is the steel trap accuracy and clarity of your explanations, which allow me to count on your explanations of the material. I can replay and replay until I get it without the concern that you have left something out (it is out of the question that you have misunderstood a point!) or explained items out of logical order. You add to my understanding with every video and I am among the thankful. Best regards, jim ps. Your French peeked through in your spelling of "fondamental" instead of "fundamental" on the whiteboard. Danish offers the same sort of challenge: fond and fund mean the same thing. After so many years of using Danish I sometimes can't remember which goes with which language. pps. Your presentation style complete with hand movements (you must be part Italian) are animated, engaged and thus animate and engage me too. Thanks!
The best explanation!! After going through many videos and references and reading machinery handbook, this is the best explanation of the concepts for me as I needed to understand this for my project and had no prior knowledge or experience in machining! Can't thank you enough for making this video and your awesome explanation! The video goes into nitty gritty of even explaining the graphs presented in the machinery handbook, which I was having hard time to understand.
Marc, That was one of the clearest descriptions I've heard on the subject. And the metric was a bonus. I've only gone back into a machine shop recently as a hobbyist, when I was doing it for real metric wasn't the standard. It's all clearer now! Regards.
Wow, this suddenly makes sense to me.. Thank you Marc for turning the lights on in my dim mind! I am trying my best to follow your lesson plan and watch all your videos in order. It is necessary for me to leave a comment on each of your videos so that I know I was in your class this day. Most important to me is that I have bookmarked this page for future reference.
you keep answering questions that have caused me to procrastinate over and over again. a this rate I will run out of excuses as to why things aren't finished... thank again for a timely and very clear explanatory video.
I am glad to be of help, but I too am a great procrastinator. I have always called these gaps in productivity, my time to think! But my wife knows me too well to be fooled by such a thin ruse. I for one have no problem with putting things off, it makes life interesting. If nothing else, it gives you something to look forward to. Thanks for watching, and for your kind words, Marc L'Ecuyer
Hello Marc, Very interesting and highly educational is this video of yours. I wasn't a member of this "club" yet when this production was uploaded, that's why I am responding now. I am amazed of your concentration to all that details. I have a mechanical eng. degree from Europe and a civil eng. degree from McGill, Montreal though I wasn't either of them. All in my over sixty years of design was of structural steel: tolerance is 1/16 th. Machining is a hobby was necessary to rebuild all motorbikes I built and rode over 70 years ago. This took 20 years of more serious machining... for me..... for you it's sloppy machining. So I do appreciate all that you said. I know that zero does not go into zero. I also know that in spite of all these standers there is temperature, non-homogeneous materials and interchangeability which came in to fashion while I was well in my way in the technical world. This update of your presentation is refrishing.
Thanks so much for this video. You've really shed light on the subject for this hobby machinist Looking forward to more of your great videos Happy new year Regards Mark
Maybe I missed something, but the depth of engagement has to matter too, a shaft & hole fit that is only .100" deep is way different then a 1" or deeper shaft and hole engagement, the 'feel' of clearance is much tighter at 1" of engagement even when the same tolerances are applied.
Bleu Wolf great job, now, I'm waiting for video about bearing fits. I alweys wonder what are tolerances of shaft to bearing in relationship to rpm of shaft ?
wait.. so the American standard is giving the tolerance value and not class of precision? That's a bit odd. How about an RC3 at a diameter of 50" ? is it possible - maybe, but it will require ultrahigh tech machinery for such a tolerance. While RC1 for a .025" may be really sloppy quality. The precision class in the metric system is more accurate to the tooling and precision (a decent/good lathe would be considered as a class 6 or 7 regardless of diameter). As a 1mm diameter within 1micron is not the same to a 1meter hole within a micron. The ugly part is you need a calculator to calculate the tolerance values, because the values are dependent of the precision class AND the base dimension, or have lots of charts ready, or just memorize the formula for each class and diy the tolerance values.
No, the figures are given for 1" and are then applied pro rata for other sizes. So a rule of thumb for a light press fit is 1 thou of interference per inch of diameter.
WOW can't believe you're just a machinist. You explain so clearly
Marc, your presentation of the material is so dependable (and clear) that even the errors in the older version of the Machinery's Handbook get cleared up. My edition from 2008 shows correctly the FN4 and FN5 designations. What I want to point out is the steel trap accuracy and clarity of your explanations, which allow me to count on your explanations of the material. I can replay and replay until I get it without the concern that you have left something out (it is out of the question that you have misunderstood a point!) or explained items out of logical order. You add to my understanding with every video and I am among the thankful. Best regards, jim
ps. Your French peeked through in your spelling of "fondamental" instead of "fundamental" on the whiteboard. Danish offers the same sort of challenge: fond and fund mean the same thing. After so many years of using Danish I sometimes can't remember which goes with which language.
pps. Your presentation style complete with hand movements (you must be part Italian) are animated, engaged and thus animate and engage me too. Thanks!
Good lesson explaining the Machinery Handbook. We need so much more of that.
The best explanation!! After going through many videos and references and reading machinery handbook, this is the best explanation of the concepts for me as I needed to understand this for my project and had no prior knowledge or experience in machining! Can't thank you enough for making this video and your awesome explanation! The video goes into nitty gritty of even explaining the graphs presented in the machinery handbook, which I was having hard time to understand.
Thanks Swati, it's all for fun and I am happy to know that the video helped you. Thanks for watching and for taking the time to write, Marc.
Marc, That was one of the clearest descriptions I've heard on the subject. And the metric was a bonus. I've only gone back into a machine shop recently as a hobbyist, when I was doing it for real metric wasn't the standard. It's all clearer now! Regards.
Marc, you've produced another great video. I really enjoy your teaching skills which makes learning easy.
Thanks....13
Excellent video. Most other explanations gloss over the most important parts! Thanks
Wow, this suddenly makes sense to me.. Thank you Marc for turning the lights on in my dim mind! I am trying my best to follow your lesson plan and watch all your videos in order. It is necessary for me to leave a comment on each of your videos so that I know I was in your class this day. Most important to me is that I have bookmarked this page for future reference.
you keep answering questions that have caused me to procrastinate over and over again.
a this rate I will run out of excuses as to why things aren't finished...
thank again for a timely and very clear explanatory video.
I am glad to be of help, but I too am a great procrastinator. I have always called these gaps in productivity, my time to think! But my wife knows me too well to be fooled by such a thin ruse. I for one have no problem with putting things off, it makes life interesting. If nothing else, it gives you something to look forward to. Thanks for watching, and for your kind words, Marc L'Ecuyer
Hello Marc,
Very interesting and highly educational is this video of yours.
I wasn't a member of this "club" yet when this production was uploaded, that's why I am responding now. I am amazed of your concentration to all that details. I have a mechanical eng. degree from Europe and a civil eng. degree from McGill, Montreal though I wasn't either of them. All in my over sixty years of design was of structural steel: tolerance is
1/16 th. Machining is a hobby was necessary to rebuild all motorbikes I built and rode over 70 years ago. This took 20 years of more serious machining... for me..... for you it's sloppy machining. So I do appreciate all that you said. I know that zero does not go into zero.
I also know that in spite of all these standers there is temperature, non-homogeneous materials and interchangeability which came in to fashion while I was well in my way in the technical world. This update of your presentation is refrishing.
Great job on this vid Marc. I'm a hobbyist and just love this education you're providing us. Keep them coming please.
Good video. Much better presentation style than the ones sitting at a desk and reading a scripted dialog.
Hello Marc
Thank you for the presentation / education
Chuck
Hi,
Good presentation, that's a good review from school theory, sometimes it get's far in our mind when not used for a while.
Thanks,
Pierre
Dear Marc, thank you very much
Lesson: 19
Will you be producing any videos demonstrating press fits, shrink fits ?
very informative video thanks mark. really enjoy all of your content.
Thanks so much for this video. You've really shed light on the subject for this hobby machinist
Looking forward to more of your great videos
Happy new year
Regards
Mark
Excellent as usual Marc.
More resolution would be nice, but then I'm spoiled with good cameras and a very fast upload speed.
Maybe I missed something, but the depth of engagement has to matter too, a shaft & hole fit that is only .100" deep is way different then a 1" or deeper shaft and hole engagement, the 'feel' of clearance is much tighter at 1" of engagement even when the same tolerances are applied.
Very nice job. Thank you.
excellent presentation Marc. ;-)
Thanks for watching, I love all your videos but I was really taken by the snowmobile shock rebuild. Great stuff! Marc L'Ecuyer
Thanks Marc. I've a ways to go to reach the same presentation style as you but I'm no teacher... LOL
Colin
Thank u so much
good explanation of how to use the book and charts
Thanks Bleu for watching, and thanks for taking the time to comment, it's really appreciated. Marc L'Ecuyer
THATLAZYMACHINIST
wonders why some use inch Giggles so many problems you did not cover bearing type and speed on H/f hole
Bleu Wolf great job, now, I'm waiting for video about bearing fits. I alweys wonder what are tolerances of shaft to bearing in relationship to rpm of shaft ?
Marc, are you ok? Haven't seen new videos from you for months...:(
Everyone except America, go to 28:50 for the Metric System. Thank me later.
found it thank you!
wait.. so the American standard is giving the tolerance value and not class of precision? That's a bit odd. How about an RC3 at a diameter of 50" ? is it possible - maybe, but it will require ultrahigh tech machinery for such a tolerance. While RC1 for a .025" may be really sloppy quality.
The precision class in the metric system is more accurate to the tooling and precision (a decent/good lathe would be considered as a class 6 or 7 regardless of diameter). As a 1mm diameter within 1micron is not the same to a 1meter hole within a micron. The ugly part is you need a calculator to calculate the tolerance values, because the values are dependent of the precision class AND the base dimension, or have lots of charts ready, or just memorize the formula for each class and diy the tolerance values.
No, the figures are given for 1" and are then applied pro rata for other sizes. So a rule of thumb for a light press fit is 1 thou of interference per inch of diameter.
Is "fondamental" a Québécois spelling of "fundamental"?
Hi MrShobar, fondamental is French for fundamental! Sometimes I forget what language I'm using, when that happens I call it Frenglish. Marc L'Ecuyer
Good video. Much better presentation style than the ones sitting at a desk and reading a scripted dialog.