Tolerancing Basics: Calculating a Fit between and Cylinder and a Hole

[@grahamovermyer5987]

Sir I am an MET student who's been confused about tolerance calculations for a long time and this video helped me figure it out. Thank you so very much:)

[@DennisAlvey]

I'm teaching a Blueprint class and this video is a great addition to my videos!!!!!

[@siphilipe]

Simply, simple explanation. Thanks!

[@turn3279]

Awesome teaching...I read a lot to understand MMC &LMC. This is very clear U MADE MY DAY SIR...THANKYOU VERY MUCH

[@சபரிபிரபாகர்தமிழ்3535]

Nanba neenga designera???? illa CNC fieldla work panringla???

[@coreyhubert1728]

Thanks for a quick and easy explanation!

[@frostpistol]

OMG ,this is one of the best explained videos iv ever seen, Thanks alot.

[@beoptimistic5853]

kzbin.info/www/bejne/rHenfpR-hpmejZo 💐.

[@thenzilthajt3409]

Excellent presentation

[@saurabhsp5046]

Thank you and well explained

[@RejviAhmed]

Great Explanation in simple way. thank you so much

[@surfriderMK]

Can you do a video with interference fit?

[@luisizquierdo9293]

Great educational video man really made it clear for me... Thanks

[@Tee.NZ.07]

great intro to fits,limits and tolerances. Now to refer this to the hole and shaft basis systems.

[@aldinsehic4353]

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[@kandasamyrajan]

It is an excellent explanation. Thanks for the video.

[@rachel_v_k]

Excellent explanation. Thank you! 👍

[@beoptimistic5853]

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[@veenadeshpande2126]

Thanks for making it simple

[@shahulmaricar4869]

Awesome Sir, Thank You Very Much!

[@peteroleary9447]

@ around 1:00, you refer to .01 a "one one hundredth" and explain the reasoning. You are technically correct, but in any machine shop or manufacturing operation the use of such nomenclature would immediately get some funny looks. The conventional unit of measure is the thousandth (of an inch). This is true in US, Canada, UK, and even Asia and other countries that have officially adopted the metric system. There are exceptions where the thousandth will be called a mil, but .01" will nearly universally be called out as "ten thousandths".

[@macias1941]

Why did you pick 0.1?

[@RC75141]

Great Video. Thank You.

[@WiseDK]

Why the cylinder has a 0.98 MMC, and not 0.99?

[@chocolatemonke]

This is still the best short explanation out there, this is a pretty old video now, i wonder if you still reply to comments? My question is how does the calculation work if you have 2 different materials with 2 different tolerances. Eg a silicone gasket with + - .04 & a CNC metal shaft with + - .05

[@furkansalihkuk]

very neat descriptions thanks a lot sir !

[@NAWAFQANNAS]

please do you have a video about tolorances ( length and angular) ?

[@naveenkumar-fs8lv]

Nice explanation & easy to understand, if possible can you please give the same example with position control (GD&T)

[@pawanraghav5178]

thank you so much sir.

[@bbbt8090]

Thank you! Just started my new cnc job and have zero knowledge.

[@beoptimistic5853]

kzbin.info/www/bejne/rHenfpR-hpmejZo 💐.

[@nagarajjyoti]

Thank you so much sir for sharing the information

[@sonhaiphan80]

Can who clear up for me these following question? please! -Based on which basis we choose the appropriate tolerance? In addition to basics such as: +Tolerance system of the hole, shaft + Assembly type:( clearance, transition, interference) -I have the assembly between the hole with the shaft, the nominal diameter 20. But there are three cases happened: Case 1: Both hole and shaft are plastic. Case 2: Both hole and shaft are metal. Case 3: One of the two parts is metal and another is plastic. So, what difference in the above three cases when we choose the tolerance for them?

[@navpreetsingh8055]

Nice video, Please make some videos for practically showing fitting or mating parts.

[@fastfoodsecrets8158]

Brilliant sir

[@beoptimistic5853]

kzbin.info/www/bejne/rHenfpR-hpmejZo ..💐

[@mitchellsmith4309]

Thank you

[@ravikattakwal4960]

Wow, explained in simple way. Please, could you make some case study/practical videos on technical drawing and how to use GD&T rules.

[@beoptimistic5853]

kzbin.info/www/bejne/rHenfpR-hpmejZo 💐.

[@sonnyudenze3759]

Thank you sir well done

[@erastusalago5543]

great introduction, than you

[@AmanSingh-oq1xj]

So what if the .05 clearance at the end is too big? You reduce all your tolerances to achieve the desired?

[@troutboy259]

The designer could switch from the "bi-directional" tolerance shown in the video of +.01/- .01 to a unidirectional tolerance such as +0 and -.01. A unidirectional the tolerance can be applied to only to the plus or minus case as desired. The unidirectional tolerance could be applied to both the hole and the shaft in a way that will lesson the amount of clearance when the hole is largest in diameter and the shaft is smallest in diameter.

[@brijchoudhary7135]

Sir 85 mm saft size who are coupling size please help

[@vigneshm1687]

Thank you so much sir😄

[@rambojohnny4649]

Thank you Sir

[@seven7asable]

I’m confused wouldn’t the .99 be the LMC? And the 1.01 be the MMC?

[@DftgChannelatAustinCommunityCo]

For a cylinder .99 is the LMC and 1.01 is the MMC but for a hole it is the opposite. The smaller .99 diameter hole leaves more material than a larger hole (1.01) where more material is removed from the part.

[@cyrusIIIII]

My problem is where did you get the numbers like +_ 0.01 for the tolerance of the hole?

[@troutboy259]

I chose a tolerance of plus/minus .01 randomly for this example. On an actual project, the designer specifies the tolerance based on the type of fit they desire in the assembly (for example a tight fit, moderate fit, or loose fit between the mating parts). The tolerance depends on the assembly. Very tight (small tolerances) will likely result in higher manufacturing costs. For this reason, designers usually specify the largest tolerance that will still allow the assembly to function properly. Often, when the assembly is designed to assemble or disassemble quickly, large tolerances between parts will be desired.

[@cyrusIIIII]

Douglas Smith Thank you very much. I still do not know how they give a number to it. Let's say I want to put a shaft of 5inch inside a hole of 5in. Let's say I want a tight fit. How do I assign a number for the tolerance? 0.1 or 0.005 or what? There are numerous combinations for both. This is my problem.

[@cyrusIIIII]

***** Thank you but I still have this question in real applications how do you decide the number for your tolerances?

[@MrDhilishkumar]

Good

[@beoptimistic5853]

kzbin.info/www/bejne/rHenfpR-hpmejZo 💐...

[@Dftg1405]

Mr. O'Leary is correct in his comment that machinists refer to .01 inches at "ten thousandths". This is because machinists in countries using the Imperial system (inches) are trained to use a thousandth of an inch as the base unit of measurement. For this reason, when a machinist sees a dimension value of .5 on a print, they will refer to the dimension as 500 thousandths in the shop (they are converting .5 to .500). In this video I was attempting to show the basics of tolerancing while trying to keep it as simple as possible so as not to confuse beginners. Later, when the students are comfortable with tolerancing concepts, I explain to them how machinists convert dimension values on a print into thousandths for use in the shop. Examples: A dimension of .125 on a print will be referred to as 125 thousandths in the shop; a dimension of .05 on a print will be converted to 50 thousandths in the shop; a dimension of 2.75 on a print will become 2 inches and 750 thousandths (or 2 and 750 thousandths). Douglas Smith

[@airtel1730]

Technical Drawing 101 with AutoCAD Channel :- Want more videos like this !! Please, make more !!

[@BreakzoneVIDS]

ah yes but how do you determine 0.01 is the clearance needed to fit

[@Dftg1405]

The designer determines how much clearance may be needed based on the desired function and relationship between the parts. For example, quick assembly and disassembly of parts may require a looser fit. Reduction in vibration may require at tight fit. I used .01 in the example to keep the math is easier for beginners.

[@mostirreverent]

Great video. would be nice if the cylinder at max version was done in green, AND to no add positional tolerances to the mix.

[@Mgidynasty]

Hellllllpppop what if I want a gap of .000-.020?????

[@belleluze]

Most machinists and engineering always use thousandths of an inch i.e. 0.010 ten thousandths.

[@troutboy259]

I absolutely agree but since this video was made for my students who are probably being introduced to the concept of a "tolerance" for the first time, I didn't want to complicate it for them by also adding in how .01" is "10 thou" in machinist speak. Later, when the students are more comfortable with the concept of plus/minus tolerancing, I explain how .10 is really .010. I made a video for this too: kzbin.info/www/bejne/fn7JfHVmdraGm68 And here is the entire playlist: kzbin.info/aero/PLKSt8bKm3IOnvBdas4OVfPv9kLkQgow92

[@krisc1243]

I always like very tight hole better.

[@gkgovind84]

Sir I am not understand the position tolerance with mmc.

[@jagadeeshkb5961]

good to leran for learner

[@yadavparas4729]

watch Version

[@jwrm22]

Thanks for this video explaining the basics. Would you go as far as adding the probability? When tolerances have a Gaussian distribution you can add: I want part A and part B to fit X% of the time. As an electrical engineer, I've seen the dispute between the mechanical engineers and electrical engineers resulting in a PCB redesign, making it 0.05mm smaller. In this case, a Gaussian distribution of tolerances was expected to make the PCB fit more often.

[@troutboy259]

That's great feedback but this video is intended for folks that are totally new to tolerancing. I've tried to keep it simple here. Maybe a more advanced video is warranted. Thanks.

[@ahmedabdalla6609]

Great video, could be 2 minutes in length though!

[@carlsagan1377]

Ah, yes. A cylinder and a hole- two mating parts.

[@MrPlausibleDenial]

Gotta be an interference fit or it won't work.

[@chainedoj]

Umm this video makes no sense. Wouldn't 0.99 round up to 1 and 1.01 round down to 1?

[@Dftg1405]

When 1.00 is the nominal size, the hole can be manufactured between a diameter of .99 and a diameter of 1.01 and still pass inspection.

[@ahyeevang3617]

How come in this video the mmc and lmc is the exact opposite from your video.... Mmc was top then to bottom is lmc. In the first block both you guys mentioned too. kzbin.info/www/bejne/rHTThmWAabiKjac Did the other guy do it wrong? You do make more sense explaining the hole how there's more or less material remaining.

[@Dftg1405]

When applied to a hole, its smallest allowable diameter is its Maximum Material Condition. This is because the smaller hole leaves behind more material (or mass). When the hole is cut at its largest diameter the hole is at Least Material Condition because more mass has been removed. The opposite is true of the cylinder. When the cylinder is made at its largest diameter it is at MMC and when manufactured at its smallest diameter it is at Least MC.

[@ginebro1930]

9 people dont "tolerate" this video

[@Paguyuban_tepa_selira]

I just my behind off because it's made in ms paint 😂

[@hiscifi2986]

+- 10 thou...? Very unrealistic measurement in the real world, unless you are designing container ship propeller shafts. Try +- 1 thou so that vehicle engineers can understand.

[@lisaniagonzalez6591]

I’m in 8th grade and I have to learn this 💀✨my last brain cell better pay attention

[@beoptimistic5853]

kzbin.info/www/bejne/rHenfpR-hpmejZo 💐...