angular Dimensional Measurement (Ppt).ppt

How to Measure Angular Dimensions

1. 1
IQC PRESENTATION

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Contents
•Angular Measurement
• Angular Tools
•Types Of Tools
•Sine Bar
•Try square
•Dial Gauge
•Clinometers

3. 3
Angular Measurement
•Circles are divided into 360 equal parts,
each being a degree.
•Each of these degrees can be evenly
divided into 60 equal parts. These parts
are called minutes.
•These minutes can be evenly divided into
60 equal parts. These parts are called
seconds.

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Types Of Tools:-
•Most common tools:-
•Simple Protractor
•Multi-Use Gauge
•Combination Set
•Universal bevel protractor

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Angular Measure Tools

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Protractor
Whole degree increments

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Multi-Use Gauge
Pre-set positions for
45 and 90 degrees,
59 degree drill point
angle, and whole
degree increments.

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Multi-Use Gauge
Pre-set position for 90 degrees.

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Multi-Use Gauge
Pre-set position for 45 degrees.

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Multi-Use Gage
Measuring 59 degree drill point angle.

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Protractor Head
Whole
degree
increments

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Protractor
Built-in
Spirit
Level

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Protractor
Angular
Measure
with
Protractor
Head

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Transfer-type Protractors

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•Precision angles to
within 5' (0.083º)
•It Consists of :-
•Base
•Vernier scale
•Protractor dial
•Sliding blade
•Dial clamp nut
Universal Bevel Protractor

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Vernier Protractor
•Used to measure obtuse angle (90º-180º)
•Acute-angle attachment fastened to
protractor to measure angles less than 90º
•Main scale divided into
two arcs of 180º
•Scale divided into 12
spaces on each side of 0
•If zero on vernier scale
coincides with line on
main: reading in degrees

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Reading a Vernier
Protractor
•Note number of whole degrees between zero
on main scale and zero on vernier scale
•Proceeding in same direction, note which
vernier line coincides with main scale line
50º
Fourth
•Multiply number by 5' and add to
degrees on protractor dial
4 x 5'= 20'
Reading =
50º 20'

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Sine Bars
•Used when accuracy of angle must be
checked to less than 5 minutes
•Consists of steel bar with two cylinders
of equal diameter fastened near ends
•Centers of cylinders exactly 90º to edge
•Distance between centers usually 5 or 10
inches and 100 or 200 millimeters.
•Made of stabilized tool hardened steel

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Sine Bar

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Sine Bars

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TRY SQUARE
•A
 
try square 
is a wood working or a metal working used
for marking and measuring a piece of
 wood.
The
 
square 
refers to the tool's primary use of measuring
the accuracy of a right angle
 (90 degrees); to 
try 
a
surface is to check its straightness or correspondence
to an adjoining surface. A piece of wood that
is
 rectangular, flat, and has all edges (faces, sides, and
ends) 90 degrees is called four square.

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Dial Gauge
•The dial gauge also known as the indicating
gauge and used for checking concentricity of
rods, holes and flatness of surfaces to accuracy
of 0.01mm. These gauges are widely used on
lathe.

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Clinometer
•A clinometer is an instrument used for
measuring angle relative to the horizontal plane.

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Type Of clinometer
•Vernier Clinometer
•Micrometer
•Dial
•Pendulum
•Optical

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