# Measuring Tools Part A Flashcards

What are the four types of steel rulers and there uses?

Spring tempered ruler-designed not to be bent. Accurate straight edge. Measures to 1/64 or .5mm

Flexible rule- made of thin stock used for measuring curves

Narrow rule-to be used in tight spaces

Hook rule-measure a chauffeur edge or line up with end of work piece

What are the lines on a steel rule? What is the smallest measurement?

Graduations

Fractional inch rule 1/64

Decimal inch rule .010

Metric rule .5mm

What are 3 common graduations?

Imperial inch

Decimal inch

Metric

What 2 types of measuring tapes are there?

Short line - less then 30 ft

Long line - up to 60 ft

What two tools are used for angular measurement? And what is there accuracy?

Plate protractor measure angles within 1 degree of accuracy

Universal bevel protractor. Measures angles within 5 minutes of a degree

What are the angular measurement units?

Full circle 360 degrees

1 degree 60 minutes

1 minute 60 seconds

What is the smallest increment the vernier scale can give you?

- 001 inch or

0. 02mm

What are the 3 types of precision callipers?

Vernier calliper

Dial calliper

Electronic digital calliper.

What is a height gauge used for?

Height gauges are used for precision layout or for measuring how high a feature is above a flat surface.

What are the 7 parts of a micrometer?

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What is the pitch of a imperial micrometer? How far does the thimble move on a complete revolution?

What is the pitch on a metric micrometer?

Pitch=0.025”

.025 inch every revolution

Metric pitch= 0.5mm

What is a intramik

An intramik uses three contact points to measure across the true diameter.

What tool can be used to measure depth?

Micrometer depth gauge

What are thickness/feeler gauges used for?

- Check bearing clearance or gear backlash
- Check tappers, spark plug gaps
- check clearances to fit piston rings and pins
- gauge gaps in narrow slots
- measure angularity in coupling shaft

What is a taper gauge used for?

- determine the width of a slot

- measure angularity of a coupling shaft alignment