Angularity, Parallelism, Perpendicularity

7/29/2019 Angularity, Parallelism, Perpendicularity

1/10

The tolerance zone is two parallel planes 0.2 apart and

on a basic 45 angle.

45

0.2 A

A

(A) This drawing

0.2 widetolerancezone

(B) Means this

45

At least one datum must be referenced

Angularity is an orientation tolerance that controls the angularrelationship between two planes or a plane and an axis. The

relationship can not be zero or 90.

Tolerance

BasicDimension

Angularity

Geometric Characteristic Symbol


2/10

Angularity can be checked using sine bars and gage

blocks.

Part being

inspected

Dial indicator

Gageblocks Surface

plate

Sine

bar

FIM (Full Indicator Movement)


3/10

The tolerance zone is a cylinder with a 0.2 diameter.

(A) This drawing

60

0.2 C D

8.28.0

C

D

(B) Means this

0.2 cyltol zone

Possibleorientation


4/10

The parallelism tolerance zone is two parallel planes 0.4

apart and parallel to the surface plate (datum X).

Parallelsurface

X0.4 X

2 planes parallel to

datum X 0.4 apart

(A) Parallelism called out on

a drawing

(B) Means this

(C) Checking parallelism with a dialindicator while on a surface plate

Dial indicatorSurface plate

Parallelism is an orientation tolerance that controls a flat

surface , a median plane, or center axis.

At least one datummust be referenced



5/10

The tolerance zone is a cylinder with a 0.4 diameter

parallel to cylindrical datum T.

70.1

0.4 T

T

60.1

0.4 cylindricaltolerance zoneparallel to datum T

120.1

Possibleorientation

(B) Means this

(A) This drawing

70.1


6/10

The hole is to be parallel to simulated datum G.

G

5.05.3

0.2 G


7/10

A dial indicator checks to insure the center line is

between the two parallel plates 0.2 apart.

Zero dialindicator

Check FIM

2 parallel planes0.2 apart

Simulateddatum Gsurface plate

12


8/10

The tolerance zone is two parallel planes 0.4 apart and

perpendicular to datum H.

0.4 H

H

(A) This drawing (B) Means this

0.4 tol zone 2parallel planes

Perpendicularity is an orientation tolerance that controls the

relationship between two planes, a plane and an axis, or two axes.

At least one datum

must be referenced


9/10

Perpendicularity is being checked with the aid of an

angle block and dial indicator.

Angleblock

Simulated

datum H

Datum Hfeature

Dialindicator

0.4 tol zone 2parallel planes

perpendicular tosimulated datum H

Spacerblock



10/10

This perpendicular tolerance zone is two parallel planes

0.2 part and perpendicular to datum G.

0.2 G

10.09.8 2 parallel planes

0.2 apart

(A) Perpendicular callout (B) Tolerance zone

Documents

Angularity, Parallelism, Perpendicularity