Tolerancing: Calculating Fits With Machinery's Handbook

[@ianritta]

For anyone wondering, Table 8a is on page 653 of the 31st edition of machinery's handbook. Great video! Thanks for providing such good explanations.

[@RDeanOdell]

Thanks for providing this info!

[@robertgreen5400]

636 on 23 rd edition

[@CADable]

@0:24 Professor I think *Allowance* is defined as *smallest hole* to *largest shaft* not *smallest shaft* . Also looks like a mistake at @11:00 subtraction it should be 1.4984. Your tutorials videos are much appreciated. Thanks a million!

[@RDeanOdell]

Hi, thanks for the input! Someday I’ll redo this video.

[@CADable]

@@RDeanOdell much appreciated

[@iSakdes]

clear, informative and to the point. you're a legend.

[@ahmedsaeid1845]

Excellent excellent explanation ..i never understood this until i saw this video..

[@RDeanOdell]

Thanks so much! I know some textbooks make it seem harder than it is.

[@mohammedabduljawad3682]

The teachers like you are the best of best Educating free and putting so much efforts We support you sir good work continue From india Mumbai🎉🎉🎉

[@Grant-Engineering1]

Great video and explanation of the topic. Thanks!

[@RDeanOdell]

Thanks so much!

[@siskel6392]

Thanks for the videos professor, you have no idea of how useful they are. Question: Do we always start by picking the shaft and then calculating?

[@RDeanOdell]

Thanks so much! No, you can start with either. All that matters is the limits of size after the calculations are finished.

[@EverydayScience24x7]

0:29 if I'm not wrong MMC Shaft = largest of shaft

[@jeremieohana5057]

At 11:00 you substract the LMC of the hole and of the shaft, the result is 2.7 but it is supposed to be 2.6 ? Am i making a mistake ?

[@SloopyJohnG]

No, Jeremie, the mistake is on the whiteboard - an arithmetic error in subtraction. The bottom right-hand figure should read 1.4984, and not 1.484.

[@BimmerWon]

Is an H7 hole in imperial the same as an H7 hole in metric? Edit: Also is an RC3 hole the same in metric and imperial? Is that a term used in both?

[@hallkbrdz]

New question: Are there tables or online tools for mixed materials? For example, a steel cased bearing in a 6061-T6 hole? Or a steel 1045 shaft with a A36 component (hole)? I realize the steel differences in expansion rate are less than for various steels vs steel / aluminum, but surely there is a tool to allow you to pick the materials, the nominal size, the one that is easier to machine to tolerance, or is fixed in size (e.g. bearing), and return close values for what should work for various types of fits.

[@hallkbrdz]

What should I use for parts designed in millimeters to be produced by people used to fractional inches? Should I translate the metric sizes and specify the ANSI tolerance/fit names? I am supplying solidworks files for CAM, but don't want to confuse machinists.

[@RDeanOdell]

Hi, I would calculate the fits with ASME B4.2 (Metric Fits) and then convert them to decimal inches for the drawing. It is not advised by ASME to put the type of fit on the drawing. Only the dimensions and tolerances are necessary on the drawing.

[@hallkbrdz]

@@RDeanOdell Thanks for the reply!

[@LalithS-bg2em]

a question, is the diagrams actually shows the tolerance range or visual representation of the diameter and shaft it self?

[@tankc4103]

Where can get limi and fit table???

[@amkc12]

Thank you. You are awesome ❤

[@RDeanOdell]

Thanks so much!

[@LemuelCarlCatap]

Hi what version of machinery's handbook did you used?

[@RDeanOdell]

It’s the 30th edition. The info is the same, but the page numbers are different.

[@_RakeshChandarS]

Hi sir, thank you this video and fan of your work.

[@RDeanOdell]

You’re welcome! Thanks for watching & commenting.

[@xluciferzgamingx2749]

i m trying to design an upright in which we press fit the bearing ( ID = 25 , OD =47) , to calculate the tolerance i need to give for the design of the upright , can we use this method?

[@IBRAR007]

Sir please help to solve a Question:- If the size of Hole is equal to the size of shaft then the type of fitment will be: A. No fitment, B. Transition fit, C. Interference fit, D. Clearence fit ?

[@jeremiahmoeller6047]

I am purchasing a pin that already has a specified tolerance from the manufacturer. I need to manufacture a hole that will achieve an FN1 fit with that pin. How do I go about using the tables when I only need to find the tolerance for the hole and not the shaft?

[@RDeanOdell]

Hi, can you share the basic size and tolerance for the pin? I can make a video where I explain the calculation for the FN1 fit.

[@jeremiahmoeller6047]

@@RDeanOdell The pin is listed as .3125”diameter, +/- .0001”. Thanks!

[@RDeanOdell]

@@jeremiahmoeller6047 Hi, I made a video to address your question: Calculating FN1 Fit with Purchase Part kzbin.info/www/bejne/f4qQZIyPaZt-jM0

[@_RakeshChandarS]

Sir, for solving the maximum shaft 1.5000-0.0016 = 1.4984. But you wrote 1.484.

[@aburayhanrony3101]

Thanks ❤️

[@RDeanOdell]

You’re welcome!

[@ForeverCrisP]

Were we partners on a project at hvcc? We made an rc car.

[@RDeanOdell]

Maybe, I graduated the HVCC MECT program in 2016

[@ariel59864470]

👍

[@linzenmeyer]

pg 630 is Spur gearing in my edition😂....22nd edition its pg 1530

[@elrincondeoliva5587]

Thanks ❤

[@RDeanOdell]

Welcome!

[@josephshaff5194]

👍