Angular measuring instruments
Angular Measurements
There
are a wide variety of geometries that are measured in angular units. These
varieties include angular separation of bounding planes, digression from a
basic direction, angular spacing conditions related to a circle, etc. Because
of these diverse geometrical forms, different types of methods, equipment
and instruments are available to measure angles in common angular units of
degree, minute and second.
Several
factors come into the role in the selection of appropriate angular
measuring instrument. These factors may be the size, general shape of the part,
the location and angular accessibility of the feature to be measured, expected
a range of accuracy, etc. As in angular measurement, they can be
categorized into two groups. The first one is standard line instrument. It
includes divided scales like protractors, Bevel Protractors. The second
category of angular measuring instruments is called face standard instruments.
Sine bars and angle gauges fall in this group.
Different
angular measuring instruments are:
·
Protractors
·
Vernier
Bevel Protractor
·
Dial
Bevel Protractor
·
Optical
Bevel Protractor
·
Sine
Bars
·
Sine
tables
·
Sine
Centre
·
Angle
Gauges
·
Sprit
Level
·
Clinometers
·
Plain
Index Centers
Optical Instruments for angular measurement such
as auto-colliometer