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Great *visual* GD&T tips (eg Concentricity + Circularity ~= Runout... sort of)

michelle
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I'm not promoting - I'm just sharing a great resource I found for *visual* G&T tips and explanations: http://www.tec-ease.com/gdt-tips.htm
I am more visual than I am wordy in order to understand things. This is a goodie:
Does Run out Equal Concentricity?—Sort Of.

Here's a complete listing of the free tips at http://www.tec-ease.com/gdt-tips.htm :
Actual Mating Envelope
Angularity
Angularity Does Not Locate Video Clip
ASME Y14.5-2009 Video Clip
Basic Dimensions
ASME Y14.41 - 2003
Boundaries
Centerlines
Circularity
Coaxiality Controls
Composite Tolerancing Video Clip
Concentricity
Circular Runout Video Clip
Corporate Addendum Video Clip
Cpk
Cylindricity Inspection
Datum
Auxiliary Datum Video Clip
Control of Datum Features Video Clip
Datum Reference Frame
Datum Shift
Datum versus Datum Feature Video Clip
Degrees of Freedom
Center Video Clip
Planer Video Clip
Spheres Video Clip
Orienting Datum Planes Video Clip
Patterns of Features
Primary Datum Feature Control
Primary Datum Surface Control
Referencing Itself
Repetitive Patterns
Selection
Selection Based on Function Video Clip
Selection - Sufficient in Size
Simultaneous Requirements Video Clip
Symbol Placement
Targets Video Clip
Directly Toleranced Dimensions
Drawing “Previews" Video Clip
Exact Constraint
Extensions of Principle
Formed Tubes, Rods, Etc. Video Clip
Feature of Size Video Clip
Feature Control Frame Video Clip
Features Have Axes Video Clip
Fixed and Floating Fasteners
Flatness
Free State
Inspection
Boundaries
Flatness
General
Hard Gage Simulation
Normal to the Surface
Probe Size
Location Tolerances
MMC and LMC
Notes On Drawings
Orientation Video Clip
Origin Symbol
Parallelism
Pick Your GD&T Tools Wisely Video Clip
Patterns of Features
Creating Patterns
Pattern - Simultaneous Requirements
Perpendicularity Video Clip
Position
Basic Dimensions
Coaxial Control Video Clip
Composite
General
Composite
Location of Irregular Feature
Material Condition Modifiers
Oblique Holes
Single Segment
Profile
Boundaries
Composite
Controlling Size and Form
Coplanarity Video Clip
Features of Size
General
Increases Tolerance
Inspection
Location of Irregular Feature
Location of Planes
Maximum Material Condition Video Clip
Profile vs Direct Tolerancing
Profile of a Line
Reporting Profile Inspection
Schedule of Tolerances
Surface Video Clip
Surface Tolerance
Tolerance
Unequal and Unilateral
Rounding Numbers
Runout
Circular Runout Video Clip
Circular vs Total
Runout vs Concentricity
Total Runout
Rules
Rule 1 Video Clip
Don’t Be Tricky with GD&T Video Clip
Size
Controlling Form
General
Inspection
Individual Control
Slots Video Clip
Standards Revisions
Straightness
General
Unit Basis
Symmetry/Position
Tangent Plane
The GD&T Hierarchy Pyramid
Profile Side
Feature of Size Side
Threads
MMC
Projected Tolerance Zone
Tolerances Video Clip
Wall Thickness
cheers, michelle



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  • I’m not a material guy, I’m a very compassionate person. Do you think that he’ll let me trade the gold star for a hug and a kiss? Or how about you E-mail it to him, you get to keep the gold star and I get a hug and a kiss from you?


    Don is a nice guy. I know him personally. Email him your concern and you'll get a reply. You can prolly get the hug from him if you come to Dayton in April but not the kiss. I'll give you that if you show.
  • There is also a Yahoo Y-14.5 user group. Like this forum, if you register, you can post questions and get timely answers about your specific "challenge". Most of the folks who frequent that site know their stuff. Many of them are certified Senior GD&T professional and/or members of the Y14.5 standards committee.


    HTH



    This is a very helpful forum with a lot of informative guys.

    BTW, the GD&T Senior cert is over rated anyways.
  • This is a very helpful forum with a lot of informative guys.

    BTW, the GD&T Senior cert is over rated anyways.
    [/COLOR]


    I guess that means you failed the test? Innocent

    I suppose that depends on who is doing the rating. As it is the only test out there that I am aware of to indicate whether or not the person talking really understands GD&T or not, I think it means something.

    I have not sat the test. Yet. [/COLOR][/SIZE][/FONT]
  • GD&T Senior cert.....does a reduced breakfast price come with that?
  • Don is a nice guy. I know him personally. Email him your concern and you'll get a reply. You can prolly get the hug from him if you come to Dayton in April but not the kiss. I'll give you that if you show.

    May be I’ll do that if I can find his E-mail address…not now though, I’m pretty busy.
  • [/color]


    I guess that means you failed the test? Innocent

    I suppose that depends on who is doing the rating. As it is the only test out there that I am aware of to indicate whether or not the person talking really understands GD&T or not, I think it means something.

    I have not sat the test. Yet. [/color][/size][/font]


    Nope, this was again a failed attempt of me trying to be funny. I added my number to my sig. I will quit with the humor now.

    I took the test and passed on my 1st try and didn't even get a gold star. On top of my 6 years experience with print review, I intensely studied for a couple of hours a day for a month. It took me 3 1/2 hours to take it and cost $350. I would suggest taking a prep class if you want to take it. ASME has a testing service give the test. It's all multiple choice so the answer is either correct or not. Was it worth it? We'll have to wait and see.
  • Bought a few Tec-Ease products. Namely The GD&T Hierarchy Y14.5-2009 Textbook and
    The GD&T Hierarchy pocket guide (don't laff, it much more fashionable than a pocket protector) and the pocket guide hurls quite well at obnoxious engineers. Hits the target more often than not.
    Anyway, customer service/shipping was superb, so much so I would even buy a used car from these folks.
    Now, if they just included heavy-duty paperboard to print out that pyramid on.
    And YES, I failed the fold test using cheap ink-jet paper.....
  • Bought a few Tec-Ease products. Namely The GD&T Hierarchy Y14.5-2009 Textbook and
    The GD&T Hierarchy pocket guide (don't laff, it much more fashionable than a pocket protector) and the pocket guide hurls quite well at obnoxious engineers. Hits the target more often than not.
    Anyway, customer service/shipping was superb, so much so I would even buy a used car from these folks.
    Now, if they just included heavy-duty paperboard to print out that pyramid on.
    And YES, I failed the fold test using cheap ink-jet paper.....
    please show the capability studies to back your claim...................we require a Cpk of at least 1.3 Rolling eyes




    Smiley
  • Dave? I've e-mailed Don asking about the availability of an intercontinental version of the pocket guide. (if i already possessed that strong of an arm? i wouldn't be CMM programming) But the 'upgrade' is definitely necessary, since our engineers in need of a direct hit to the cranium are now in Asia...spreading their incompetence to a new continent. Thank goodness it's one of our legacy designs.
    Current local engineers are handled via smart bomb 'pocket guides' placement at no cost to them.
    Remains to be seen if it sinks in.
    But back to topic? A darn good product by Tec-Ease.
    Oh, and those capability studies? I tried, but HR has them locked up tighter than
    Fort Knox, but I have heard thru grapevine that our company medical costs via head wounds suffered by design engineers are up 61%.
    sounds promising to me.

  • I disagree with the video:

    - Circularity and circular run out are applied to each circular element individually.
    - Cylindricity and total run out are applied to the entire feature surface area.
    - Concentricity is applied to the median point of two opposing points on each circular element individually or each cross section.

    Concentricity + Circularity is less than or equal to Circular Runout not Total Runout


    Email this to him. You may get a gold star.


    I E-mailed Don last Thursday as you suggested, I also included “A part that passed Concentricity, Circularity and Circular Runout would failed Cylindricity and Total Runout due to taper”.
    So far no response from him…..will see.
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