sfol matrix

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Matrix of Geometric A/ributes vs. Y14.592009 Tools www.gd-t.com © 2014 Stolter, LLC Geometric A+ributes No datum references required Datum references required Size Form Orienta:on Loca:on ASME Y14.5C2009 Dimensioning & Tolerancing Tools Size Always controls size Rule #1: Any feature of size (ISO requires Envelope modifier) Rule #1: Parallelism of two opposed parallel planes Does not control loca:on Independency Modifier (ISO default); or whenever Rule #1 does not apply Size does not control any other type of orienta:on; does not control parallelism of two parallel planes without Rule #1 Form Does not control size Always controls form Does not control orienta:on Does not control loca:on Orienta:on Does not control size When applied to a flat surface (and no Tangent Plane Only Modifier used) Always controls orienta:on Does not control loca:on When applied to FOS (or to a flat surface with Tangent Plane Only Modifier) Loca:on Does not control size Does not control form (although may control balance) Always controls orienta:on Always controls loca:on Runout Does not control size Always controls form Always controls orienta:on (or at least wobble) Controls coaxiality when applied to a surface of revolu:on When applied to a surface that is 90° to the datum axis Profile With all around/ over (or with datum reference AND basic distance to datum) Almost always With datum reference (or when applied to mul:ple or some complex surfaces) With datum reference AND basic distance to datum Without all around/over (and without datum reference AND basic distance to datum) Maybe not (If Tangent Plane Only Modifier is used) Without datum reference (or when applied to single or simple surfaces) Without datum reference OR basic distance to datum

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Page 1: SFOL Matrix

Matrix'of'Geometric'A/ributes'vs.'Y14.592009'Tools

www.gd-t.com©2014 Stolter, LLC

Geometric)A+ributes)

No)datum)references)required) Datum)references)required)

Size) Form) Orienta:on) Loca:on)

ASM

E)Y14.5C2009)Dim

ension

ing)&)Tolerancing)Too

ls))

Size) ✔"Always))controls)size)

✔"

Rule)#1:))Any)feature)of)size)(ISO)requires)Envelope)modifier))

✔"Rule)#1:)Parallelism)of)two)opposed)parallel)planes)

✗"Does)not)control)loca:on)

✗"

Independency)Modifier)(ISO)default);)or)whenever)Rule)#1)does)not)apply)

✗"

Size)does)not)control)any)other)type)of)orienta:on;)does)not)control)parallelism)of)two)parallel)planes)without)Rule)#1)

Form

)

✗"Does)not))control)size) ✔"

Always)controls)form)

✗"Does)not)control)orienta:on) ✗"

Does)not)control)loca:on)

Orien

ta:o

n)

�! Does)not))control)size)

✔"

When)applied)to)a)flat)surface)(and)no)Tangent)Plane)Only)Modifier)used))

✔"Always)controls)orienta:on) ✗"

Does)not)control)loca:on)

✗"

When)applied)to)FOS)(or)to)a)flat)surface)with)Tangent)Plane)Only))Modifier))

Loca:o

n)

✗"Does)not))control)size) ✗"

Does)not)control)form)(although)may)control)balance))

✔"Always)controls)orienta:on) ✔"

Always)controls)loca:on)

Runo

ut)

✗"Does)not))control)size) ✔"

Always)controls)form)) ✔"

Always)controls)orienta:on))(or)at)least)wobble))

✔"Controls)coaxiality)when)applied)to)a)surface)of)revolu:on)

✗"When)applied)to)a)surface)that)is)90°)to)the)datum)axis)

Profi

le)

✔"

With)all)around/over)(or)with)datum)reference)AND)basic)distance)to)datum))

✔"Almost)always) ✔"

With)datum)reference)(or)when)applied)to)mul:ple)or)some)complex)surfaces))

✔"

With)datum)reference))AND)basic)distance)to)datum)

✗"

Without)all)around/over)(and)without)datum)reference)AND)basic)distance)to)datum))

✗"

Maybe)not)(If)Tangent)Plane))Only)Modifier)is)used))

✗"

Without)datum)reference)(or)when)applied)to)single)or)simple)surfaces))

✗"

Without)datum)reference)OR)basic)distance)to)datum)