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GeoTolPro
Registrace 19. 01. 2010
GeoTol Inc. is a full-service training and consulting firm on geometric dimensioning and tolerancing (GD&T). Please visit our website for information regarding onsite training, online training, virtual training, consulting, books, pocket guides, leader PowerPoint and model set packages.
www.geotol.com
►► Check out our self-paced online GD&T course→ GeoTol Pro 2020: bit.ly/GeoTolProOnlineCourse
www.geotol.com
►► Check out our self-paced online GD&T course→ GeoTol Pro 2020: bit.ly/GeoTolProOnlineCourse
GD&T Coaxial Controls – Comparison and Applications
This video shows the coaxial controls of position and profile. These are the most common symbols on a GD&T drawing. Using a practical example of a rotating shaft, Scott Neumann will go thru each diameter with the recommended geometric tolerance for the application. This is per ASME Y14.5 but could also be done with ISO-GPS with a couple modifications.
►► Check out our self-paced online GD&T course→ GeoTol Pro 2020: bit.ly/GeoTolProOnlineCourse
►► Check out our advanced online course on GD&T→ GeoTol Applications and Tolerance Stacks: bit.ly/GeoTolAppsStacksOnlineCourse
GeoTol Inc. is a full-service training and consulting firm on geometric dimensioning and tolerancing. Please visit our website for information regarding onsite training, online training, virtual training, consulting, books, pocket guides, DVD video, leader PowerPoint and model set packages.
www.geotol.com
►► Check out our self-paced online GD&T course→ GeoTol Pro 2020: bit.ly/GeoTolProOnlineCourse
►► Check out our advanced online course on GD&T→ GeoTol Applications and Tolerance Stacks: bit.ly/GeoTolAppsStacksOnlineCourse
GeoTol Inc. is a full-service training and consulting firm on geometric dimensioning and tolerancing. Please visit our website for information regarding onsite training, online training, virtual training, consulting, books, pocket guides, DVD video, leader PowerPoint and model set packages.
www.geotol.com
zhlédnutí: 4 762
Video
GD&T - Selecting Datum Features
zhlédnutí 13KPřed 10 měsíci
This video shows how to choose datum features with functional GD&T applications. Functional datum features benefit design, manufacturing, and inspection. Non-functional datum features cause stack ups of profile and position tolerance. ►► Check out our self-paced online GD&T course→ GeoTol Pro 2020: bit.ly/GeoTolProOnlineCourse ►► Check out our GD&T workbook to ASME Y14.5-2018 and ISO-GPS→ GeoTo...
GD&T Symbols Overview
zhlédnutí 2,4KPřed 10 měsíci
This video is a quick introduction to GD&T symbols and their respective categories and terminology in ASME Y14.5 and ISO-GPS. Keep in mind, this is a bit of an over simplification (profile can sometimes be used in form only applications) ►► Check out our self-paced online GD&T course→ GeoTol Pro 2020: bit.ly/GeoTolProOnlineCourse ►► Check out our GD&T workbook to ASME Y14.5-2018 and ISO-GPS→ Ge...
Profile vs Runout for GD&T Applications
zhlédnutí 4,3KPřed 10 měsíci
This video shows the coaxial controls of total runout and profile tolerance per ASME Y14.5 on coaxial shafts. It shows the differences between them as well as practical applications of where to use one versus the other. ►► Check out our self-paced online GD&T course→ GeoTol Pro 2020: bit.ly/GeoTolProOnlineCourse ►► Check out our GD&T workbook to ASME Y14.5-2018 and ISO-GPS→ GeoTol Pro 2020: bit...
GD&T Position vs Concentricity - Comparison
zhlédnutí 11KPřed 11 měsíci
This video explains the difference between position tolerance and concentricity on a cylindrical feature with GD&T per ASME Y14.5. It shows why concentricity is not the term you should use and instead switch to "coaxial" to keep diameters centered on a datum axis. It also shows the different meanings in can have in the ISO-GPS standards. ►► Check out our self-paced online GD&T course→ GeoTol Pr...
Position vs Runout GD&T Applications
zhlédnutí 6KPřed 11 měsíci
This video shows the differences between position tolerance and total runout in GD&T per ASME Y14.5. There are applications of where you should use one symbol vs the other. ►► Check out our self-paced online GD&T course→ GeoTol Pro 2020: bit.ly/GeoTolProOnlineCourse ►► Check out our GD&T workbook to ASME Y14.5-2018 and ISO-GPS→ GeoTol Pro 2020: bit.ly/GeoTolPro2020Book GeoTol Inc. is a full-ser...
What is GD&T, and Why Do You Need It?
zhlédnutí 4,2KPřed rokem
This video is a quick introduction to GD&T (or GT&D). You need to split the idea to two separate concepts: Dimensioning and Tolerancing. Some industries can get away with plus/minus tolerances or even no tolerances. Any part that has a combination of precise and complicated geometry could benefit from definition using geometric tolerancing. ISO-GPS and ASME Y14.5 are great standards to start fr...
About GeoTol and our GD&T Training Programs
zhlédnutí 6KPřed rokem
This video introduces our company GeoTol Inc, our president Scott Neumann, and our area of expertise: GD&T training. GeoTol Inc. is a full-service training and consulting firm on geometric dimensioning and tolerancing. Please visit our website for information regarding onsite training, online training, virtual training, consulting, books, pocket guides, video, leader PowerPoint, and model set p...
GD&T, Choosing functional vs non-functional datum features
zhlédnutí 7KPřed rokem
This video shows why choosing the most functional datum features benefits design, manufacturing, and inspection. Non-functional datum features cause stack ups of profile and position tolerance. ►► Check out our self-paced online GD&T course→ GeoTol Pro 2020: bit.ly/GeoTolProOnlineCourse ►► Check out our GD&T workbook to ASME Y14.5-2018 and ISO-GPS→ GeoTol Pro 2020: bit.ly/GeoTolPro2020Book GeoT...
Why GD&T is Important
zhlédnutí 1,1KPřed rokem
GD&T, is a symbolic language expressed on engineering drawings. It’s an essential tool to describe the limits of dimensional deviation on a mechanical part. Communication between design, manufacturing, and quality help maintain product integrity while maximizing manufacturing tolerance. GD&T Training & GD&T Courses are available visit geotol.com/ for more information.
Composite Position Tolerance for Coaxial Holes
zhlédnutí 8KPřed rokem
This advanced video shows composite position tolerance in ASME Y14.5-2018 and the difference between two single segments. The video uses coaxial holes to illustrate the concept. Remember: the datum feature references constrain rotation only in the lower segment of composite! This is a sample video from our GeoTol Pro 2020 online course per ASME Y14.5-2018 ►► Check out our self-paced online GD&T...
The MMC modifier with Position (Bonus Tolerance)
zhlédnutí 27KPřed rokem
This video shows the basics of the MMC modifier with position tolerance in ASME Y14.5-2018. It includes the calculations of bonus tolerance. This is a sample video from our GeoTol Pro 2020 online course per ASME Y14.5-2018 ►► Check out our self-paced online GD&T course→ GeoTol Pro 2020: geotol.com/training/online-training/ GeoTol Inc. is a full-service training and consulting firm on geometric ...
Using Zero Tolerance at MMC
zhlédnutí 7KPřed rokem
This video shows the advanced concept in GD&T of zero tolerance at MMC. It is a fascinating way to allow more size tolerance while maintaining the same geometric tolerance and allow a functional fit. The video goes thru fast so you may need to pause to analyze the numbers better. ►► Check out our self-paced online GD&T course→ GeoTol Pro 2020: geotol.com/training/online-training/ This is an exa...
Hole Position Tolerance with Parallelism
zhlédnutí 7KPřed rokem
This video shows a position tolerance applied to a hole. A parallelism is added to refine the orientation. The inspection and reporting of the data is also shown. ►► Check out our self-paced online GD&T course→ GeoTol Pro 2020: geotol.com/training/online-training/ This is an example clip from our GD&T course called GeoTol Pro 2020 updated to ASME Y14.5-2018. This video shows how to select datum...
Advanced Position Tolerance: Using Two Segments
zhlédnutí 8KPřed rokem
This video shows an advanced technique for position tolerance to refine the location within a pattern of features. This is a sample video from our GeoTol Pro 2020 online course per ASME Y14.5-2018 ►► Check out our self-paced online GD&T course→ GeoTol Pro 2020: geotol.com/training/online-training/ GeoTol Inc. is a full-service training and consulting firm on geometric dimensioning and toleranci...
Position Tolerance Introduction and Review
zhlédnutí 11KPřed rokem
Position Tolerance Introduction and Review
Parallelism Applied with Profile Tolerance
zhlédnutí 8KPřed rokem
Parallelism Applied with Profile Tolerance
Flatness Tolerance - How to apply and measure
zhlédnutí 18KPřed rokem
Flatness Tolerance - How to apply and measure
ASME Y14.5 Envelope vs ISO Independency
zhlédnutí 9KPřed rokem
ASME Y14.5 Envelope vs ISO Independency
ASME Y14.5 vs ISO-GPS Term Differences
zhlédnutí 4,2KPřed rokem
ASME Y14.5 vs ISO-GPS Term Differences
Composite Profile Tolerance applied to a Curved Surface
zhlédnutí 9KPřed 2 lety
Composite Profile Tolerance applied to a Curved Surface
GD&T Grommet Example: Manufacturing and Inspection
zhlédnutí 2,8KPřed 2 lety
GD&T Grommet Example: Manufacturing and Inspection
Inspection of Position Tolerance using Boundary Method
zhlédnutí 10KPřed 2 lety
Inspection of Position Tolerance using Boundary Method
Limits and Fits, Selecting a Size tolerance
zhlédnutí 2,1KPřed 2 lety
Limits and Fits, Selecting a Size tolerance
Nice explanation
The only video i watched and made me subscribe. Following to watch all the other videos.
Why don't you have a C datum in your example? If you did, could you repeat the A-B-C in the lower to fully control the orientation of the lower control?
Datum feature B in this example is both holes, which constrain the final 3 degrees of freedom. Datum features A|B fully constrain the part.
Thank you, I missed that datum B was in 2 plcs. IF you had a hole and slot as the B and C datums, could you repeat the A-B-C in the lower portion of the composite? Could it be appropriate? I only see examples repeating A and B and they are always parts that resemble blocks. I work with sheet metal parts or molded plastic parts with complex shapes where the datums aren't always square to the part.
Is that Bouns TOl Parts Applicable for Process Capability?
Calculating capability with a position tolerance zone and the added bonus tolerance is tricky because the allowed tolerance changes based on the hole size. There is another technique using the calculated virtual condition (MMC hole minus the position). This is a fixed boundary that the hole must not violate. Then measure how close the hole surface gets to the boundary (calculated RAME). Here is a related video for that: czcams.com/video/HSx7ofsad1k/video.html
Thanks❤
The explanation was very satisfactory
Dude you're a life saver
5:30 Do the center plane of slot C must go thru circle B?
Yes, ASME Y14.5 requires the true geometric counterpart for C to be located (centered in this case) to datums A and B.
Really good and informative video
Thank you for the information!
Thank you very much❤
I heard that, there's a thumb rule in GD&T that size tolerance should be more than the geometric tolerance. Is it correct?
I don't like that rule. It just depends on the application. Sometimes the size is very important (press fit) but where the feature is on the part is not important (big position tol). On a rotating shaft, sometimes the size does not matter but the coaxiality is very important (for balance).
@@GeoTolPro Thank you for your quick response..
What would you do if do if datum C was an inch below datum A? Would any variation of the hole in Z be anyway included in the calculation of where the hole is? Or is it just the deviation from the 4.600?
No the Z height doesn't affect the measured value. The tolerance zones must be rotationally aligned to that primary datum A plane. The perpendicularity of the datum feature C axis does affect the measured position tolerance value however.
@@GeoTolPro What if C nominally isn't perpendicular to A?
Thank you 🙏🙏🙏🙏🙏
Experienced machinist naturally do this only different is designers should really consider this to make life easer for shop floor people
I agree. A lot in this system is what machinists and inspectors would call natural and common sense. Geometric tolerancing is just giving us the language to communicate that "common sense" in a more explicit way.
Now, how can we can we control coaxiality of Hex., elliptical features ? Please suggest...
I would recommend profile tolerance relative the the datum reference frame. If size didn't matter that much, you could have a larger profile tolerance relative to the DRF and then refine with a dynamic profile control relative to the DRF. Profile is definitely the way to go for irregular features.
Great explanation
Thank you,
Thanku sir
Excellent video, i understand the complex parts very easily ❤
Like Like Like, for the most beneficial man in the world.
I love the B joke😄😄😄😄
Hello I am quite puzzled with Shift datum ASME vs ISO. In asme you never use datum shift M condition as a bonus tolerance but in ISO i see some examples those tolerances are added to bonus tolerance.
They are the same. Although ISO doesn't call it "shift". In ISO 2692, it says the MMVC shall not be violated by the datum feature's surface. This means the datum feature could "shift" to meet the requirements of other features on the part. You can not add the datum feature shift as bonus in either standard.
@@GeoTolProcan I find it this info ISO 2692. We are having quite serious discussion over it. Having a solid example might convince people.
In this case, is there a difference if you called this out as a composite position DRF instead of a position DRF and a parallel DRF?
No difference on this example because there is only a single feature. The lower frame of a composite constrains rotational degrees of freedom only. This would control orientation only to the lower datums just like the parallelism. However, composite position would be different if there were multiple holes. The lower frame of composite would also control location between the features in addition to orientation to the datums.
like the explanation, to-the-point.
Do not agree with your explanation of the Profile tolerance, that tolerance has nothing to do with flatness. Profile tolerance describes the form precision of e.g. double curved surfaces. You cannot add flatness to that. Flatness would flatten the double curved surface.If you want to specify the angle of that surface, you should add parallelism to that surface.
I literally just saw you in our GD&T training that we have in our learning portal at work. You are the best instructor I have ever had out of the 5X classes I have taken.
That's awesome. Thanks for the compliment!
Hi, just want to know that can we call datum A-B to feature having datum A. In your example datum A feature dimensions FCF have A-B. Please.... guide.
You want all features located to the same datum reference frame. Even the datum features A and B are located to the common datum A-B. Datum features A and B do not establish the datum by themselves so they need relationships to the A-B also.
Tanks a lot for your support
really good lecture!
thank you, awesome explanation!
That's the best explanation i've seen
Best video ever in GD&T
Great explanation! Could you also explain the difference between regular flatness and a flatness with CZ? How the tolerance zones would be in these two cases?
Flatness "combined zone" is an ISO-GPS concept. The CZ modifier locates the flatness tolerance zones together to also control location between the surfaces (usually to control coplanarity). ASME would instead switch to a profile tolerance to control location between multiple surfaces.
@@GeoTolPro Understood. Thank you very much!
Hey thanks for this explanation! Question 0:15: Is there a difference for the manufactured part to inspect if you: 1) Datum A onto the flatness callout itself (like in the video), or if you put: 2) Datum A on directly the surface Does it matter or is it actually the same? Thanks :)
No difference there. The surface must be flat. Then it is also named "datum feature A". Personally, I like to have the symbols together.
Is it compulsory for the MMC symbol to be put at the lower frame?
No, you don't have to add the MMC modifier. However, the tolerance in the lower frame is usually (not always) calculated based on the MMC clearance between hole and pin so it makes sense to add the mmc modifier.
do we need to put basic (box on) dimensions if we are applying GD&T what is the rule?
Dimensions shall be basic when the features are located with position and profile. A dimension can be made basic with either a box around it or a note. (A note is used in this drawing) See Y14.5-2018 section 5.1.1.2
Excellent Demonstration, . Amazing work
Excellent video! Much appreciated!
is the hole pattern locked to the basic dimensions, meaning there is no variance allowed ? or could the each hole be shifted in any direction as long as it remained within the 0.2 tolerance. For example , @4:41 each hole shifted together, but could one hole go to the left , and one to the right meaning they deviate from each other but do not exceed 0.2 position.
The theoretical tolerance zones are locked to the basic dimensions. The hole axes may shift within the dia 0.2 tolerance zones.
Thank you sir❤
very very good explanation
Thank you
Excelent video!
I disagree, A should be on the opposite side, A doesn't exist until machined, sure you want to use functional feature if it makes sense, holes as datums ya, when it makes sense,
Datum features are selected based on how the part functions (how it mounts in the assembly). It doesn't matter the sequence of operations from manufacturing. When the part is all finished, what are the functional requirements?
This reduced the swelling in my head by 100% thank you 😂
Very well explained 👍
A very good explanation. I'm enjoying the content. My only comment is that manufacturing engineers ( methods dept and Inspection ) can interpret a GDT drawing but I'd say many machinists won't be able to as in many cases it doesn't suit their machine workholding situation or knowledge of other features being at MMC or LMC or even other part sizes. But the definition of part feature importance as defined by drawing must be specified I totally agree; therefore to assist the manufacture there needs to be other manufacturing information such as a route card or job sheet with alternative information specified and tailored towards the intended manufacturing method. I'm beginning to appreciate GDT more but the drawing part definition of a functional assembly fit, doesn't help the maker from a vice face and corner location. There needs to be intermediary unambiguous information to exactly suit the method of manufacture on that particular machine.
Right, a functional design drawing does not replace the manufacturing plan or work instructions for how to make it. Geometric tolerancing on the design drawing only states the functional requirements for the final product. This may have an influence on how the part is made, but it does not state the method of manufacturing or sequence. However, geometric tolerancing could also exist on the manufacturing level to document "in-production" checks to manage process control.
@@GeoTolPro Thanks for this - perhaps this aspect can have a greater emphasis in the videos. I have noted that it's rarely mentioned - for sure you have talked about work Instructions etc but I REALLY WORRY THAT MACHINISTS are really losing sleep over GD&T and how to interpret / apply it. How to tie it all up to their jig, fixtures and vice setups must be a nightmare very often.
I have watched a thousand of videos about MMC. Everytime I asked myself why the hell do we cut material more in maximum material condition. I finally understand it. thx.
1st of all, I’d like to thank you for your excellent videos with details. 2nd, I’m happy to see you are still looking healthy so hopefully you will continue to provide more useful videos. ❤
What if the hole had a countersink. How do you treat the situation.
Countersinks often "self-center " the fastener. MMC modifiers may not be appropriate here.