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l i n e a r m e a s u r e m e n t
Linear Measurement :-
Non Precision Instruments
1) Calipers
1) firm joint callipers (Inside & Outside callipers)
2) spring type callipers (Inside & Outside callipers)
3) Odd leg callipers
2) Trammels
Preicision callipers
1) Vernier calliper Least Count -0.02 mm
1) Type A
2) type B
3) type C
A) Vernier height gauge
B) Vernier depth gauge
2) Micrometers Least Count -0.01
1)Outsdie Mircometer
2)Inside Micrometer
3)Depth micrometer
4)Bench Micrometer
5)Digital micrometer
6)Micrometer with Dial gauge
7)Screw thead micrometer
Bore guage
1) Dial Bore gauge
2) Hemipherical bore gauge
Telescopic gauge
Slip Gauge
Limit gauge
1) Plug gauge
2) Progressive Plug gauge
3) Ring gauge
4) Snap gauge
5) Progressive snap gauge
Calibration of linear measurement
1)Calibration of vernier calliper
A)Hardness Test on working faces
B) Flatness and squareness of beam
C) Flatness of the working surface
D) Parallelism of the measuring Jaw
E) Accuracy
1)Calibration of micrometer
A)Zero error Test
B)Backlash error
C)Banding Test
D)Parallelism error test
E) Flatness error test
VERNIER DEPTH GAUGE
OUTSIDE MICROMETER
INSIDE MICROMETER
DEPTH MICROMETER
BENCH MICROMETER
DIGITAL
MICROMETER
MICROMETER WITH DIAL GAUGE
SCREW THREAD MICROMETER
DIAL BORE GAUGE
HEMISPERICAL BORE
GAUGE
TELESCOPIC GAUGE
TELESCOPIC BORE GAUGE
APPLICATION OF TELESCOPIC BORE GAUGE
SLIP GAUGE
WRINGING OF SLIP GAUGE
SLIP GAUGES
LIMIT GAUGE
PLUG DOUBLE ENDED‘GO’ AND ‘NOGO’ GUAGE
PROGRESSIVE PLUG
GAUGE
TAPER PLUG GAUGE
RING GAUGE
RING GAUGE
DOUBLE ENEDED SNAP GAUGE
PROGRESSIVE SNAP GAUGE
ADJUSTABLE SNAP GAUGE
Angular measurement
Angular Measurement :-
A)Protractors
1)Vernier Bevel Protactors
2)Universal bevel protactor
3)Optical bevel protactors
b) Sine Bars
C)Sine Centers
D)Angle Gauges
E)Spirit Level
F)Clinometer
1)Vernier clinometer
2)Micromter clinometer
G) Auto Clinometer
H) Angle Dekkor
APPLICATION OF
SLIP GAUGES
Advantages of sine Bar:-
1) It is used for accurate and precise angular measurement
2) It is available easily
3) Its is cheap
Disadvantage:-
1)The application is limited for a fixed centre distance
between two plugs or rollers.
2) It is difficult to handle and position the slip gauges
If the angle exceeds 45 degree sine bar are impracticable and
inaccurate.
3) Large angular error may result due to slight error in sine
bar
SOURCES OF ERROR IN SINE BAR :-
1) Error in distance between rollers
2) Error in slip gauges combination used for angle setting
3) Error in equality of size of rollers and cylinders accuracy in the form
of rollers.
4) Error in parallelism of roller axes with each other.
5) Error in flatness of the upper surface of the bar
SINE CENTRE
ANGLE GAUGES
SPIRIT LEVEL
VERNIER CLINOMETER
MICROMETER CLINOMETER
AUTO COLLIMATOR
LINEAR and ANGULAR Measurement
LINEAR and ANGULAR Measurement
LINEAR and ANGULAR Measurement
LINEAR and ANGULAR Measurement
LINEAR and ANGULAR Measurement

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LINEAR and ANGULAR Measurement