Perpendicularity - Drafting Standards, GD T Tolerance Analysis - Eng-Tips The orientation or perpendicularity tolerance zones are oriented to the datum reference frame and not the datum features The surface must then fall within the tolerance zone The perpendicularity specification reads: This feature is perpendicular to the datum reference frame which is established, in order, by datum features A and B
Difference between axial total runout and perpendicularity Hi all, A part is consisted of two coaxial cylindrical features Is there any difference between the following callouts: 1 Perpendicularity on the end face of one of the features to a datum axis of the other feature 2 Total axial runout on the same end face to the datum axis In terms of
Perpendicularity to Two Datums - Drafting Standards, GD T . . . - Eng-Tips Y14 5-1994 shows perpendicularity to two datums, which I've always used (Fig 6-35, p 182) Y14 5-2009 and 2018 show perpendicularity to two datums but add an angularity constraint to A|B (Fig 6-4, p 101) I believe the intent is the same, but the addition of the angularity FCF is just confusing in my opinion
Perpendicularity - Drafting Standards, GD T Tolerance Analysis - Eng-Tips The perpendicularity must be a refinement of the dimension tolerance, typically half or less The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows
Perpendicularity Callout - Drafting Standards, GD T . . . - Eng-Tips The perpendicularity callout is a zone tolerance of the perpendicularity of the flange on the tube to the axis of Datum A You take the basic location of the flange and project a line 1 2 the callout window one direction and 1 2 the other and that is your target window for the OD
Perpendicularity callout with curved datum 1 - Eng-Tips perpendicularity: the condition of a line element, surface, tangent plane, feature’s center plane, or feature’s axis at an implied or specified basic 90° perpendicular) angle relative to one or more datum planes or datum axes
Perpendicularity - Drafting Standards, GD T Tolerance Analysis - Eng-Tips There should be basic dimensions for the location of the hole But these basic dimensions would not be related to the perpendicularity tolerance, but to a position tolerance that should control the location of the hole The basic dimension that would be related to the perpendicularity requirement is an implied 90° angle
Perpendicularity Stack-up - Drafting Standards, GD T Tolerance . . . Nothing -- so the stack for leaning is really about parallelism That's controlled by the perpendicularity tolerances going in opposite directions, but also the size tolerance John-Paul Belanger Certified Sr GD T Professional Geometric Learning Systems
Limits of perpendicularity related to thickness of part 310toumad, I'm sure there are practical limits (I don't know of exact figures but I can envision points at which perpendicularity doesn't make sense in the bulk of applications) however with the establishment of whats "practical" there also comes very highly specific applications for which the normal rules (or rather - rules of thumb) do not apply
Question on Perpendicularity 1 - Eng-Tips My first thought that the 001 perpendicularity tolerance on RevA is not equivalent to the 001 perpendicularity tolerance on RevB The bore is longer than the face, therefore, the perpendularity calls up a tighter fixturing angle For RevA, consider opening up the perpendicularity tolerance