READING A MICROMETER Get Precise Measurements

READING A MICROMETER Get Precise Measurements

Small Engines Use 3 Types Micrometer Caliper Depth Gauge Micrometer

Micrometers Measure as small as 1/10,000 of an inch (.0001 inch) Different frame sizes are used to provide a wider measurement range.

Know the Parts

Spindle and Anvil are the contact points

Spindle and Thimble turn together

A micrometer caliper is read at the point were the edge of the thimble crosses the barrel scale or sleeve

The Sleeve The space between each number is divided into quarters.

Easy to read just think of the sleeve as

What is the measurement?

What is the measurement? 2.00 or 0.200 inches

What is the measurement?

What is the measurement? 2.25 or 0.225 inches

What is the measurement?

What is the measurement? 2.50 or 0.250 inches

What is the measurement?

What is the measurement? 2.75 or 0.275 inches

What is the measurement?

What is the measurement? 3.75 or 0.375 inches

If the sleeve is dollars and quarters, the thimble is pennies As the thimble rotates add the pennies to the dollars and quarters. Reading the sleeve we get 3.25 or .325 inch. Now add the pennies, or .001 to the sleeve measurement. .326 inch

What is the measurement?

What is the measurement? 3.75 .10 or 0.385 inches

What is the measurement?

What is the measurement? 3.00 .04 or 0.304 inches

What is the measurement?

What is the measurement? 4.25 .05 or 0.430 inches

What is the measurement?

What is the measurement? 4.75 .12 or 0.487 inches

Practice Reading a micrometer gets easier with practice!

METRIC MICROMETERS

Parts of a Metric Micrometer

Reading 12 mm Read the scale on the sleeve, these are full mm.

Reading 12mm 0.5mm 12.5 mm reading the scale on the sleeve, a further ½ mm can be seen the scale below the full mm scale. Our measurement is now 12.5 mm.

Reading 12mm 0.5mm 0.16mm 12.66 mm lly, the thimble scale shows 16 full divisions (these are hundredths of a mm). measurement is now 12.66 mm.

Let’s Try Another

Let’s Try Another 16 .36 16.36 mm

On Your Own

On Your Own 7 0.5 0.26 7.76 mm