linear measurements
Department of MECH
an
ica
l.in
Paavai Institutions
ch
UNIT II
ww
w.
me
LINEAR AND ANGULAR MEASUREMENTS
UNIT-II
2. 1
Department of MECH
CONTENTS
LINEAR MEASURING INSTRUMENTS
2.1.1
SCALES
2.1.2
CALIPERS
2.1.3
VERNIER CALIPERS
2.1.4
MICROMETERS
2.1.5
SLIP GAUGES
2.3
LIMIT GAUGES
2.4
PLUG GAUGES
2.5
TAPER PLUG GAUGE
2.6
RING GAUGES
2.7
SNAP GAUGE
2.8
TAYLOR’ S PRINCIPLE
2.9
COMPARATORS
2.9.2
2.9.3
MECHANICAL COMPARATORS
me
2.9.1
an
INTERFEROMETERS
ch
2.2
ica
2.1
l.in
Paavai Institutions
ELECTRICAL COMPARATOR
ELECTRONIC COMPARATOR
SINE BAR
2.11
BEVEL PROTRACTORS
w.
2.10
2.11.1 VERNIER BEVEL PROTRACTOR:
2.12
AUTO- COLLIMATOR
2.12.1 WORKING OF AUTO-COLLIMATOR
ww
2.12.2 APPLICATIONS OF AUTO-COLLIMATOR
2.13
UNIT-II
ANGLE DEKKOR
2. 2
Department of MECH
TECHNICAL TERMS
Comparators
l.in
Paavai Institutions
Comparators are one form of linear measurement device which is quick and more
ica
convenient for checking large number of identical dimensions.
Least count
The least value that can be measured by using any measuring instrument known
an
as least count. Least count of a mechanical comparator is 0.0 1 mm.
Caliper
Caliper is an instrument used for measuring distance between or over surfaces
rules etc.
Interferometer
me
ch
comparing dimensions of work pieces with such standards as plug gauges, graduated
They are optical instruments used for measuring flatness and determining the length of the slip gauges by direct reference to the wavelength of light.
Sine bar
w.
Sine bars are always used along with slip gauges as a device for the measurement of angles very precisely.
Auto-collimator
ww
Auto-collimator is an optical instrument used for the measurement of small
angular
an
ica
l.in
Paavai Institutions
ch
UNIT II
ww
w.
me
LINEAR AND ANGULAR MEASUREMENTS
UNIT-II
2. 1
Department of MECH
CONTENTS
LINEAR MEASURING INSTRUMENTS
2.1.1
SCALES
2.1.2
CALIPERS
2.1.3
VERNIER CALIPERS
2.1.4
MICROMETERS
2.1.5
SLIP GAUGES
2.3
LIMIT GAUGES
2.4
PLUG GAUGES
2.5
TAPER PLUG GAUGE
2.6
RING GAUGES
2.7
SNAP GAUGE
2.8
TAYLOR’ S PRINCIPLE
2.9
COMPARATORS
2.9.2
2.9.3
MECHANICAL COMPARATORS
me
2.9.1
an
INTERFEROMETERS
ch
2.2
ica
2.1
l.in
Paavai Institutions
ELECTRICAL COMPARATOR
ELECTRONIC COMPARATOR
SINE BAR
2.11
BEVEL PROTRACTORS
w.
2.10
2.11.1 VERNIER BEVEL PROTRACTOR:
2.12
AUTO- COLLIMATOR
2.12.1 WORKING OF AUTO-COLLIMATOR
ww
2.12.2 APPLICATIONS OF AUTO-COLLIMATOR
2.13
UNIT-II
ANGLE DEKKOR
2. 2
Department of MECH
TECHNICAL TERMS
Comparators
l.in
Paavai Institutions
Comparators are one form of linear measurement device which is quick and more
ica
convenient for checking large number of identical dimensions.
Least count
The least value that can be measured by using any measuring instrument known
an
as least count. Least count of a mechanical comparator is 0.0 1 mm.
Caliper
Caliper is an instrument used for measuring distance between or over surfaces
rules etc.
Interferometer
me
ch
comparing dimensions of work pieces with such standards as plug gauges, graduated
They are optical instruments used for measuring flatness and determining the length of the slip gauges by direct reference to the wavelength of light.
Sine bar
w.
Sine bars are always used along with slip gauges as a device for the measurement of angles very precisely.
Auto-collimator
ww
Auto-collimator is an optical instrument used for the measurement of small
angular