Precision Measurement Vernier Calipers and Micrometers in Metric and Imperial M.Friesen 2017

Vernier Calipers STANDARD DIAL DIGITAL Metric/Imperial Metric/Imperial

Standard Comes in Metric and Imperial measurements with scales on the top and bottom. Main Scale Vernier Scale Sizes can range from 6” (15cm) – 12” (30cm)

HOW TO READ METRIC 10 mm 0.02mm 0.10 mm

Closest measurable tolerance READING METRIC 20 mm + 1 mm + 0.02 mm = 21.02mm 0.02mm Closest measurable tolerance

HOW TO READ IMPERIAL (Decimal) 0.001 Inch 0.10 Inch (4 x 0.025”) 1 Inch (10 x 0.100”)

READING IMPERIAL (Decimal) 1.000” + 0.050” + 0.023” = 1.073”

DIAL CALIPERS

HOW TO READ METRIC Instead of a sliding Vernier Scale, a dial caliper uses a dial. Each increment is 0.01mm ANSWER? 16.20mm

HOW TO READ IMPERIAL 1.682” This Imperial dial is divided in half. Each increment is 0.001” You could also find both Metric and Imperial dials that are not divided. ANSWER? 1.682”

DIGITAL CALIPERS Can be changed from Metric to Imperial by the push of a button

MICROMETERS Standard Micrometer Metric/Imperial Vernier Style Micrometer

THE PARTS OF A MICROMETER Metric or Imperial

For a micrometer to work effectively we need to know the approximate size before using this precision instrument

READING METRIC 0 – 25mm 0.01mm 5mm + 0.50mm + 0.28mm = 5.78mm

READING METRIC WITH A VERNIER SCALE 0 – 25mm 0.001mm 5 5mm + 0.50mm + 0.28mm + 0.003mm = 5.783mm

Lines in between dollars = QUARTERS READING IMPERIAL 0 – 1” 0.001” 0 – 24 = CENTS 0.001 Lines in between dollars = QUARTERS 0.025 Large numbers = DOLLARS 0.100

READING IMPERIAL 0 – 1” 0.001” .200” + 0.075” + 0.001” = 0.276”

READING IMPERIAL WITH A VERNIER SCALE 0 – 1” 0.0001” 0.2000”+ 0.0750”+ 0.0090” + 0.0005” = 0.2845”

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