Gd&t Table

R ES TR IC TED MOV EMENT

A

PAR ALLEL LINES

B

PAR ALLEL LINES

PITC H DIAMETER R ULE: TOLER ANC ES THAT APPLY TO S C R EW THR EADS APPLY TO THE AXIS OF THE THR EAD DER IV ED FR OM THE PITC H C YLINDER . IF ANOTHER PAR T OF THR EAD IS TO B E US ED TO DER IV E THE AXIS , IT MUS T B E S TATED B ENEATH THE FEATUR E C ONTR OL FR AME. ANY OTHER FEATUR E THAT HAS A PITC H DIAMETER MUS T HAV E THE DATUM FEATUR E S TATED.

G EOMETR IC TOLER ANC E R ULE: G EOMETR IC TOLER ANC ES AR E UNDER S TOOD TO B E APPLIED R FS . IF MMC OR LMC IS R EQUIR ED, IT MUS T B E PLAC ED IN THE FEATUR E C ONTR OL FR AME. S EE MMC , LMC , OR R FS C OLUMN.

LIMITS OF S IZE R ULE: W HER E ONLY A S IZE DIMENS ION IS G IV EN. a) THE S IZE DIMENS IONS AT ANY C R OS S S EC TION MUS T B E W ITHIN THE S IZE TOLER ANC E. b) THE S UR FAC E(S ) S HALL NOT EXTEND B EYOND THE PER FEC T FOR M DEFINED B Y THE MMC S IZE. c) THE FOR M MAY V AR Y W ITHIN AN ENV ELOPE B ETW EEN THE MMC AND LMC .

FR EE MOV EMENT

DATUM R EFER ENC E FR AME: (THR EE PLANE C ONC EPT). THE C ONC EPT OF US ING MUTUALLY PER PENDIC ULAR FEATUR ES OF A PAR T TO C ONTR OL ITS FR EE MOV EMENT IN S PAC E (DEG R EES OF FR EEDOM). S EE DATUM S YMB OL AND DATUM TAR G ETS .

A1

C

S YMMETR Y

C ONC ENÐ TR IC ITY

POS ITION

TOTAL R UNOUT

C IR C ULAR R UNOUT

PR OFILE OF A S UR FAC E

PR OFILE OF A LINE

ANG ULAR ITY

PER PENÐ DIC ULAR ITY

PAR ALLELIS M

C YLINDR IC ITY

C IR C ULAR ITY

FLATNES S

S TR AIG HTNES S

S YMB OL

PAR ALLEL LINES

Ð DATUM TAR G ETS : US ED TO LOC ATE S PEC IFIC POINTS , LINES , OR AR EAS ON PAR TS US ED FOR S UPPOR T FOR MAC HINING AND INS PEC TION C OMMONLY US ED ON R IG ID PAR TS LIKE C AS TING S AND FOR G ING S AND NON-R IG ID PAR TS MADE FR OM PLAS TIC , R UB B ER , OR S HEET METAL.

TOLER ANC E ZONES : ALL TOLER ANC E ZONES S HOW N IN THE FEATUR E C ONTR OL FR AME AR E TOTAL. EXAMPLE: FLATNES S W ITHIN .004 MEANS THAT TW O PAR ALLEL PLANES NO MOR E THAN .004 APAR T DEFINE THE TOLER ANC E ZONE.

Ð DIAMETER S YMB OL: THIS S YMB OL R EPLAC ES THE W OR D "DIAMETER ." IT S HOULD B E US ED ANYW HER E THER E IS A DIAMETER ON THE DR AW ING , AND W HEN A TOLER ANC E ZONE IS C YLINDR IC AL.

Ð B AS IC DIMENS ION: THES E DIMENS IONS HAV E NO TOLER ANC E. THEY ONLY LOC ATE A TOLER ANC E ZONE.

A

Ð DATUM S YMB OL: THIS S YMB OL IS ATTAC HED TO A PLANE OR S IZE FEATUR E THAT MUS T B E C ONTAC TED FOR MAC HINING AND INS PEC TION.

F

Ð FR EE S TATE: THIS S YMB OL INDIC ATES THE PAR TS MUS T NOT B E R ES TR IC TED DUR ING INS PEC TION.

ST

Ð S TATIS TIC AL TOLER ANC E: A TOLER ANC E FOR A PAR T OF AN AS S EMB LY B AS ED ON THE R ES ULTS FR OM A S TATIS TIC AL C ALC ULATION. THE DES IR ED R ES ULT IS LAR G ER TOLER ANC ES .

Ð PR OJ EC TED TOLER ANC E ZONE: W HEN P THE S YMB OL IS S HOW N, IT MEANS THE S TATED TOLER ANC E ZONE IS EXTENDED B EYOND THE S UR FAC E OF THE PAR T, NOT W ITHIN THE PAR T.

R FS Ð R EG AR DLES S OF FEATUR E S IZE: THIS IS THE DEFAULT C ONDITION FOR ALL G EOMETR IC TOLER ANC ES . NO B ONUS TOLER ANC ES AR E ALLOW ED. FUNC TIONAL G AG ES MAY NOT B E US ED.

L

Ð LMC Ð LEAS T MATER IAL C ONDITION: THAT C ONDITION W HER E A FEATUR E OF S IZE C ONTAINS THE LEAS T AMOUNT OF MATER IAL W ITHIN THE S TATED LIMITS OF S IZE. EXAMPLE: MAXIMUM HOLE S IZE AND MINIMUM S HAFT S IZE.

M

Ð MMC Ð MAXIMUM MATER IAL C ONDITION: TYPE THAT C ONDITION W HER E A FEATUR E OF S IZE C ONTAINS THE MAXIMUM AMOUNT OF MATER IAL W ITHIN THE S TATED LIMITS OF S IZE. EXAMPLE: MINIMUM HOLE S IZE AND MAXIMUM S HAFT S IZE.

D

.004

A

.004 A

.004 A

A

A

.620 C

.380

B

.014 M A B C

.250

.004 A

.004 A

A

A

A

.004 A

.004

15û

.004 A

A

.004 A

A

PAR ALLEL PLANES

A

.004

.005

.004

.005

.004

.005

.004

.005

.004 A

.500

.500

.500

.500

AS S HOW N ON DR AW ING

E

A

PAR ALLEL PLANES

.004 EQUALLY DIS POS ED FR OM C ENTER PLANE

A

A

.004 AR OUND DATUM AXIS

TR UE C ENTER

.380

.620

.014 ZONE AT MMC

.022 ZONE AT LMC

TW O C ONC ENTR IC C YLINDER S A .004 APAR T

C ONC ENTR IC C IR C LES A .004 APAR T

TW O PLANES .004 APAR T ALONG TR UE PR OFILE

TW O LINES .004 APAR T ALONG TR UE PR OFILE

TW O PAR ALLEL PLANES .004 APAR T 15û A

90û

TW O PAR ALÐ LEL PLANES .004 APAR T A

A

TW O PAR ALLEL PLANES .004 APAR T

TW O C ONC ENÐ TR IC C YLINDER S .004 APAR T

TW O C ONC ENÐ TR IC C IR C LES .004 APAR T

TW O PAR ALLEL PLANES , .004 APAR T

OR C AN APPLY TO A FEATUR E OF S IZE.

F

YES

YES

YES

YES

YES

MAY B E US ED OR MAY NOT

MAY B E US ED OR MAY NOT

YES

YES

YES

NO

NO

NO

NO

DATUM US ED

PAR ALLEL PLANES

R FS ALW AYS

R FS ALW AYS

OR L C AN APPLY TO A FEATUR E OF S IZE. M

R FS ALW AYS

R FS ALW AYS

DOES NOT APPLY

DOES NOT APPLY

OR L C AN APPLY TO A FEATUR E OF S IZE. M

OR L C AN APPLY TO A FEATUR E OF S IZE. M

OR L C AN APPLY TO A FEATUR E OF S IZE. M

DOES NOT APPLY

DOES NOT APPLY

DOES NOT APPLY

L

TW O PAR ALLEL LINES .004 APAR T M

MMC LMC OR R FS

TOLER ANC E ZONE

G

H

PAR ALLEL PLANES

NO

G

J

J

NO

H M

G

E

B

F

E

D

C

J

H

G

D

IS S TATED

YES IF

NO

NO

NO

NO

IS S TATED

M

YES IF

A

J

H

IS S TATED

D

A G

M

YES IF

H

IS S TATED J

G

D

A

E

B

M

YES IF

NO

NO

D

J

NO

H

M

A

TOLER ZONE TYPE

IS S TATED

YES IF

FUNC G AG E US ED

S Y M B O L S , R U L E S , A N D G U ID E L IN E S

TER TIAR Y DATUM (ONE POINT MIN)

MODIFIER FOR THE S TATED TOLER ANC E

PR IMAR Y DATUM (THR EE POINTS MIN)

S EC ONDAR Y DATUM (TW O POINTS MIN)

A B C

R ELATIV E TO

A B C

B ONUS

AC TUAL MMC .003

.503 .500

H

PAR ALLEL PLANES

J

C YLINDER ZONE

G ENIUM PUB LIS HING C OR P. ONE G ENIUM PLAZA S C HENEC TADY, NY 12304 C ompiled by : S ampreet A.

THIS C HAR T IS PR OV IDED FOR INFOR MATIONAL PUR POS ES ONLY. THE INFOR MATION IS B AS ED UPON AS ME Y14.5M - 1994.

* THIS C OLUMN INDIC ATES POS S IB LE TOLER ANC E ZONES THAT MAY B E US ED W ITH THE V AR IOUS C ONTR OLS . THE DIFFER ENT TOLER ANC E ZONES AR E S HOW N ALONG THE B OTTOM OF THIS C HAR T.

A V IR TUAL C ONDITION W ILL EXIS T ONLY FOR TOLER ANC ES THAT C ONTR OL S IZE FEATUR ES .

INTER NAL FEATUR ES : MMC S IZE Ð TOLER ANC E OF FOR M, OR IENTATION, OR LOC ATION

EXTER NAL FEATUR ES : MMC S IZE + TOLER ANC E OF FOR M, OR IENTATION, OR LOC ATION

TO C ALC ULATE V IR TUAL C ONDITION:

V IR TUAL C ONDITION: THE C OLLEC TIV E EFFEC T OF S IZE AND G EOMETR IC TOLER ANC ES THAT MUS T B E C ONS IDER ED IN DETER MINING THE FIT OR C LEAR ANC E B ETW EEN MATING PAR TS OR FEATUR ES .

S HIFT: AS A DATUM FEATUR E OF S IZE, THAT IS G EOMETR IC ALLY C ONTR OLLED, DEPAR TS FR OM MMC , ADDITIONAL TOLER ANC E MAY B E C ONS IDER ED FOR THE C ONTR OLLED FEATUR ES . THIS ADDITIONAL TOLER ANC E DOES NOT ADD DIR EC TLY TO THE OR IG INAL TOLER ANC E B UT MUS T B E APPLIED TO THE PATTER N OF FEATUR ES AS A G R OUP. IT IS C ONS IDER ED A TOLER ANC E THAT ALLOW S THE C ONTR OLLED FEATUR ES TO S HIFT AS A G R OUP.

B ONUS TOLER ANC ES AND FUNC TIONAL G AG ES : DIR EC TLY APPLIC AB LE TO ANY G EOMETR IC C HAR AC TER IS TIC THAT IS MODIFIED B Y M .

FUNC TIONAL G AG ES : DEV IC ES THAT MEAS UR E THE C OLLEC TIV E EFFEC TS OF S IZE AND G EOMETR IC TOLER ANC ES AT THE S AME TIME. IT R EPR ES ENTS A S IMULATED MATING C ONDITION.

AT MMC THE HOLE MUS T B E POS ITIONED W ITHIN A C YLINDR IC AL TOLER ANC E ZONE OF .005 DIAMETER . AS THE EXAMPLE S HOW S , THE HOLE HAS DEPAR TED FR OM MMC B Y .003. THE .003 B ONUS TOLER ANC E MAY NOW B E ADDED TO THE OR IG INAL .005 ZONE FOR A TOTAL OF .008 TOLER ANC E.

.005 M A

.500 .507

EXAMPLE:

B ONUS TOLER ANC E: W HEN MMC IS S HOW N MODIFYING A PAR TIC ULAR TOLER ANC E, THE S TATED TOLER ANC E APPLIES ONLY W HEN THE FEATUR E B EING C ONTR OLLED IS AT MMC . THE B ONUS IS THE DIFFER ENC E B ETW EEN THE AC TUAL S IZE AND THE MMC S IZE AND MAY B E ADDED DIR EC TLY TO THE OR IG INAL TOLER ANC E.

EXAMPLE: THE POS ITION OF THE FEATUR E AXIS MUS T B E WIT HIN A .005 TOLER ANC E ZONE AT MMC R E LAT IVE TO DATUM FEATUR ES A, B , AND C .

W ITHIN

.005 M

B AS IC S ENTENC E S TR UC TUR E: W HEN US ING THE ENG LIS H LANG UAG E TO S AY W HAT IS IN THE FEATUR E C ONTR OL FR AME. YOU MAY US E THE FOLLOW ING C ONNEC TING W OR DS :

G EOMETR IC C HAR AC TER IS TIC S YMB OL

DIAMETER S YMB OL (C YLINDR IC AL TOLER ANC E ZONE)

S TATED TOLER ANC E

.005 M

FEATUR E C ONTR OL FR AME:

FAC TS TO R EMEMB ER

G EO M ETR IC D IM EN S IO N IN G FAC TS TO R EMEMB ER

FOR M OR IENTATION PR OFILE

R UNOUT LOC ATION