Limits, Fits & Tolerances -
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- Опубликовано: 11 сен 2024
- Machinist's guide to ISO Limits and Fits system. Get your interference, clearance and transition fits under control with this video.
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Equipment used on the FutureFab Channel:
* Europa 1000VS Mill (Bridgeport Style)
* Colchester Student 2500 Harrison Lathe
* Heidenhain TNC320 Controlled CNC Europa 5000VS 3 Axis Mill
* Fanuc Oi-TD controlled Harrison Alpha 4000XS CNC Lathe with 8 Station Turret
* Geared Head Drill Press
* Horizontal Bandsaw
* Gryphon Pedestal Grinder
* CTR Lasers Laser Cutter
* Makerbot 2X 3D Printer
* RepRap Prusa i3
* Mitutoyo Vickers Hardness Tester
* Hounsfeld Tensile Tester
By drilling and reaming to an H7 hole, we can use the ISO fits chart to determine the size of the shaft needed before turning that to length on the lathe.
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Equipment used on the FutureFab Channel:
* Europa 1000VS Mill (Bridgeport Style)
* Colchester Harrison Lathe
* Heidenhain TNC320 Controlled CNC Europa 5000VS 3 Axis Mill
* Fanuc Oi-TD controlled Harrison Alpha 4000XS CNC Lathe with 8 Station Turret
* Geared Head Drill Press
* Horizontal Bandsaw
* Pedestal Grinder
* Laser Cutter
* Makerbot 2X 3D Printer
* RepRap Prusa i3
* Mitutoyo Vickers Hardness Tester
* Hounsfeld Tensile Tester
I watched so many videos but finally found one that visual demonstrates the difference between the three fits. This video was awesome!!!! :) Thanks
Thanks Navjot, these kind of comments really motivate me to produce more videos!
Sir, Great Video on ISO limits and Fits system. The illustration and example were perfectly supported by your explanation. Thanks for uploading!
Thank you for adding physical examples to demonstrate the different fits!
Very clear and informative; will look forward to seeing other videos by FutureFab. Thank you.
This is the best video on limits and fits for anyone who doesn't quite understand it.
I'm an electronics Engineer, designing sim racing pedals on Inventor. This video helped a lot, Sir. Thank You For the video.
Fabulus. Quiery : for the H7/k6 transition fit. you select H7 borehole, slot 10 to 18, making it a +18,+0 microns selection. And for k6 cylinder shaft (axel) you select slot 6-10, making it a +10,+1 micron . When you have a 10 millimeter basic size. There is a possibility for misinterpretation, Basismeasure 6-10mm or 10-18mm slot, (k6, slot 10-18 gives +12,+1) shouldnt you select the same slot for both ? What is the usual method ? Is it because it is a "Hole basis" system, and the shaft is slightly smaller ... 1 micron is 1 millionth of a meter. or a thouands of a millimeter. Great stuff. You are my teacher !
Did you get an answer to this? I found that a bit confusing myself.
Fantastic video! It really shows when someone knows what they are talking about, you are an excellent teacher :)
I gone through many lecture to understand limit and fits, however, this video is really great for me..
Great video. I have a test tomorrow that will include limits and fits and this was just what i was looking for. I've seen a load of students make throw fits, i didn't realise it had a technical term 🤣
You are so clear on explanation! Want more videos from you...
Nice! You should this as a kit! I’d buy one :) Or perhaps there are kits like these available to practice what the fits feel like.
Thanks man, very helpful!
Thank you so much. I finally made sense of this topic and u made it so simple when everywhere else it's like some black magic
Great video.
thanks ur 10million times better than our college tutor
Thanks fro doing this. I use this video to teach my students about fits and tolerances.
OMG...MY LECTURE SPENT AN HOUR ON THIS STILL DID NOT HEAR HIM....THANKS FOR THE AWESOME VIDEO
...NO HOMO!!!
Thanks this totally clears my confusion about automotive ball joint fit!
Thanks for making this great video👍
@4:00 you choose basic size of the 10-18mm -> which translates to the 0 to 18 hole size H7, shafts you then look to choose the row up (6-10 mm) which translate to a 1 to 10 hole. Why did you not choose 1 to 12 hole that maintains on the same row of the table?
Thanks! This is very enlightening.
Great video, really helped me a lot for my exam preparation
Awesome demonstration, thanks !
all three videos CNC,cad, machine fitting.these video are helpful
+Amresh pandey thanks for the kind words!
You put in time and effort and for that I guess we are grateful. Great job and please keep them coming!
this is so satisfying :D
Great vídeo could you share the Link or how you get the chart of fits
Shortest and Clearest video on fits and tolerances in entire youtube. Plz tell which chart u r using or share its link.Thanks.
Thank you for this demo!!
Please make more vedios like this !! ENJOY
Lecturer didn't finish lecture and said he'd go through this next lecture. He never did. Six weeks later. legit saved a brother in need. exam tomorrow haha
+Najid Pereira-Ishak glad it helped!
+Najid Pereira-Ishak Glad it helped! Hope the exam went well.
fully owned that exam haha
Hello Sir. Thanks for the nice video. I got a question.if you had to go for a shaft Basis fit. like when you already have your shaft.then for a similar medium drive fit, you gotta go for S7/h6. So my question is, How you make a S7 hole. is there any specific reamer or smth for that purpose ?
Always wondered about the fit H7/h6. What would happened if the Hole and Pin are at MMC? What if the two parts have been sent to two different vendors? Is it going to be a misfit? Because Hole and Pin at MMC will not assemble quite easily? Is there a rule followed at machine shops where the Pin/Shaft (easier to control a male feature) is never finished at it's MMC?
thank you for the the valuable video
Thanks for this. What do you do if you already have a part, a dowel pin or bearing... what if I want a light interference but the pin or bearing is already sized and the only control we have is with the bore diameter? This happens all the time for me! I never know how to spec that caus I don't know what iso limit the pin or bearing was made to.... any help? Pete.
I wish we had mcmaster-carr over here in the UK!
Also sorry Pete. I'm getting better at replying to comments! Honest! Generally pick the standard for and machine to that. In your case match shaft to bearing. If prefit shaft available as per comment below, use that and save yourself a load of time. Happy days.
How's the shredder?
The thing is it doesn't only work on nominal dimensions...Unless you want to plot the limit ranges to find the maximum and minimum clearance you could just say for example φ10.585H7. That's a crude way to get around but when you start having many mating parts it's better to plot the desired fit and move it based on what is standard and what is to be made.
please do you have a video about tolorances ( length and angular) ?
Where can I find the pages you used in your video? Thanks
Hello, great explanation! It cleared up a lot of things for me. Just a question, from 3:51 onwards when you spec the H7 10mm hole, you said it's 0.018 but shouldn't it be 0.015 because the chart says "up to and incl" 10. The row you chose is "Above" 10, up to and incl to 18.
Thank you
yeah you are correct and thank you..
@@aprathap7187 Correct
right, I'll need a clearance fit then
Thanks for this
Thanks for this video. What about a misfit?
THANK YOU SO MUCH!!!!!!!
nice, thank you.
Thank you Richy!
guys where can i download the limits-fits and tolerance ?
Hey Sir, can you answer why did you use 3 holes if only shaft what was of different size?
Just to demonstrate!
what is the ISO standard you mentioned? ...
BS EN 20286-1:1993(ISO 286-1:1988 )...... ISO system of limits and fits. Bases of tolerances, deviations and fits
BS EN 20286-2 : 1993(ISO 286-2:1988 ).... ISO system of limits and fits. Tables of standard tolerance grades and limit deviations for holes and shafts
Hope that helps!
it seems that you always used the same reamer, so, the holes are all 10 mm H7. Have I understood correctly?
+ingDemurtas Yes. Perfect!
4:13 That's 18 thousands, not hundreds
Please give me shaft size and housing size for bearing no 6204
Im having trouble understanding the 10mm k6 0.01 and 0.001 tolerance, what were you calculating?
Nevermind, got it
He accidentally picked the wrong diameter values in chart instead of the values for 10mm.
Hey where can I get this chart please. Thanks
+luvsmusicluvs2dance They are in most machinist's handbooks such a as ZEUS books but the exact one I used in this video comes from here s200.photobucket.com/user/oldtiffie/media/Limits_and%20_Fits/Limits_and_Fits11.jpg.html
hi
I want to drill 10 mm ID through hole
in a 50 OD * length 120mm
tolerance H7 . a piston slides through 10 mm ID . in what way H7 can be achieved perfectly. can any one guide me with this
+Rajesh .T Tolerances are generally paired. The H7 is just the hole tolerance and would be achieved by a reaming to 10mm.
As it's a piston you want a sliding fit but to be honest this generally achieved with piston rings as they can be replaced.
Is the piston a stock component or are you machining it? If you are machining it then on a hole basis (H7) you probably want a g6 shaft tolerance.
Hope this helps!
I'm sure he's taught at my high school (parrswood high school)
I did! from 2005-2009, scarily 13 years ago since I worked there. I've since moved careers three times! Did I teach you and does the fact you're viewing Limits & Fits videos mean you're now some kind of engineer? If so, congratulations!
FutureFab CNC & 3D Printing hahaha yes, it's Harkaran, since doing design tech I've founded and then sold a 3D printing start-up, now working in Metrology Engineering. You're a legend
Harkaran! Yes, I do remember you and remember you seemed to be a good young designer! Well done mate, sounds like you're doing really well !
8:20
"welcome to 5 minute Friday" he says in a 10 minute video