Slide 1

linear measurement

Linear Measurement :-Non Precision InstrumentsCalipers 1) firm joint callipers (Inside & Outside callipers) 2) spring type callipers (Inside & Outside callipers) 3) Odd leg callipers

2) Trammels

Preicision callipers

Vernier calliper Least Count -0.02 mm 1) Type A 2) type B 3) type CVernier height gauge Vernier depth gauge

2) Micrometers Least Count -0.01Outsdie MircometerInside MicrometerDepth micrometerBench MicrometerDigital micrometerMicrometer with Dial gaugeScrew thead micrometer

Bore guageDial Bore gaugeHemipherical bore gauge

Telescopic gauge

Slip Gauge

Limit gaugePlug gaugeProgressive Plug gaugeRing gaugeSnap gaugeProgressive snap gaugeCalibration of linear measurement

Calibration of vernier calliperA)Hardness Test on working facesB) Flatness and squareness of beamC) Flatness of the working surfaceD) Parallelism of the measuring JawE) Accuracy

Calibration of micrometerZero error TestBacklash errorBanding TestParallelism error testFlatness 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 GAUGEPLUG DOUBLE ENDEDGO AND NOGO GUAGE

PROGRESSIVE PLUG GAUGE

TAPER PLUG GAUGE

RING GAUGE

RING GAUGE

DOUBLE ENEDED SNAP GAUGE

PROGRESSIVE SNAP GAUGE

ADJUSTABLE SNAP GAUGEAngular measurementAngular Measurement :-A)ProtractorsVernier Bevel ProtactorsUniversal bevel protactorOptical bevel protactorsb) Sine BarsSine CentersAngle GaugesSpirit LevelClinometerVernier clinometerMicromter clinometerG) Auto ClinometerH) Angle Dekkor

APPLICATION OF SLIP GAUGES

Advantages of sine Bar:-

It is used for accurate and precise angular measurementIt is available easilyIts 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 gaugesIf the angle exceeds 45 degree sine bar are impracticable and inaccurate.3) Large angular error may result due to slight error in sine barSOURCES OF ERROR IN SINE BAR :-

Error in distance between rollersError in slip gauges combination used for angle settingError in equality of size of rollers and cylinders accuracy in the form of rollers.Error in parallelism of roller axes with each other.Error in flatness of the upper surface of the bar

SINE CENTRE

ANGLE GAUGES

SPIRIT LEVEL

VERNIER CLINOMETER

MICROMETER CLINOMETER

AUTO COLLIMATOR