Measuring Tools Measuring Tools and Systemsand Systems

Chapter 5Chapter 5

Page 40Page 40

Measuring Systems U.S.Measuring Systems U.S. U.S. = U.S. =

Length= miles, feet, inches, fractions of Length= miles, feet, inches, fractions of an inch, tenths, hundredths, thousandths, an inch, tenths, hundredths, thousandths, ten thousandths, and decimals.ten thousandths, and decimals.

Pressure= pounds per square inch Pressure= pounds per square inch (p.s.i.)& vacuum (inches of mercury)(p.s.i.)& vacuum (inches of mercury)

Weight= poundsWeight= pounds Liquids= gallons, quarts, pints, and Liquids= gallons, quarts, pints, and

ounces, cubic inchesounces, cubic inches Temperature= Fahrenheit Temperature= Fahrenheit Torque= Foot poundsTorque= Foot pounds

Measuring Systems Measuring Systems MetricMetric

Metric= Metric= Length= kilometers, meters, Length= kilometers, meters,

centimeters, millimeterscentimeters, millimeters Pressure= Kilograms per square Pressure= Kilograms per square

centimetercentimeter Weight= kilograms, grams,Weight= kilograms, grams, Liquids= Liters, cubic centimetersLiquids= Liters, cubic centimeters Temperature= CelsiusTemperature= Celsius Torque= Newton MetersTorque= Newton Meters

Measuring ToolsMeasuring Tools Ruler/Tape Ruler/Tape

MeasureMeasure

Feeler Gauges and Wire Feeler Gauges and Wire GaugesGauges

Safety CheckSafety Check

Never use feeler gauges on Never use feeler gauges on operating machinery. operating machinery.

Feeler gauges are strips of hardened Feeler gauges are strips of hardened metal that have been ground or metal that have been ground or rolled to a precise thickness. They rolled to a precise thickness. They can be very thin and will cut through can be very thin and will cut through skin if not handled correctly. skin if not handled correctly.

Points to NotePoints to Note There are many types of feeler gauges, each There are many types of feeler gauges, each

with a specific application. with a specific application. Feeler gauges usually come in sets with a Feeler gauges usually come in sets with a

number of blades. The thickness of each blade number of blades. The thickness of each blade is marked in thousandths of an inch and is marked in thousandths of an inch and hundredths of a millimeter. A marking of 0.040 hundredths of a millimeter. A marking of 0.040 indicates the feeler is 40 thousandths of an indicates the feeler is 40 thousandths of an inch thick. It may also indicate a measurement inch thick. It may also indicate a measurement of 1.02 millimeters. A feeler marked 0.005 of 1.02 millimeters. A feeler marked 0.005 indicates the thickness is 5 thousandths of an indicates the thickness is 5 thousandths of an inch. It may also indicate 0.12 millimeters. inch. It may also indicate 0.12 millimeters.

Some sets contain feelers made of brass. Some sets contain feelers made of brass. These are to take measurements between These are to take measurements between magnetic components. magnetic components.

When measuring a spark plug gap, it is When measuring a spark plug gap, it is preferable to use wire feeler gauges. These preferable to use wire feeler gauges. These feelers use accurately machined pieces of feelers use accurately machined pieces of wire instead of metal strips. wire instead of metal strips.

If the feeler gauge feels too loose when If the feeler gauge feels too loose when measuring a gap, select the next size larger measuring a gap, select the next size larger and measure the gap again. Repeat this and measure the gap again. Repeat this procedure until the feeler gauge fits snugly procedure until the feeler gauge fits snugly in the gap. If the feeler gauge is too tight, in the gap. If the feeler gauge is too tight, select a smaller size until the feeler gauge select a smaller size until the feeler gauge fits snugly in the gap. fits snugly in the gap.

Feeler GaugesFeeler Gauges

Vernier CalipersVernier Calipers

Picture from pg 42

CalipersCalipers Outside Measurement- Measure Outside Measurement- Measure

outside diameters of an object. (Ex. outside diameters of an object. (Ex. Camshaft)Camshaft)

Inside Measurement- Measure inside Inside Measurement- Measure inside diameters of an object. (Ex. diameters of an object. (Ex. Cylinder bore)Cylinder bore)

Depth Measurement-Measure depth Depth Measurement-Measure depth of an object. (Ex. Bolt hole depth)of an object. (Ex. Bolt hole depth)

MicrometersMicrometersDigital Mic

U.S & Metric

Inside Mic

Bore Gauge

Depth Gauge

MicrometersMicrometers Very accurateVery accurate Measures to the nearest ten Measures to the nearest ten

thousandththousandth Very FragileVery Fragile Tricky to useTricky to use Easy to use after you learn how Easy to use after you learn how

MicrometersMicrometers

How to Read the How to Read the MicrometerMicrometer

First find “dollars” = 600 First find “dollars” = 600 (don’t use (don’t use decimal point)decimal point)

Next find Quarters = 50 Next find Quarters = 50 (two quarters (two quarters equals 50 cents) equals 50 cents)

Next Find Pennies = 13 Next Find Pennies = 13 ( Pennies are ( Pennies are on the thimble)on the thimble) +__________ +__________

Now Place Decimal Point HereNow Place Decimal Point Here .663 .663

Find the Size of Find the Size of the Micrometer and Place Here the Micrometer and Place Here 2.6632.663 (use smaller of (use smaller of the two numbers)the two numbers)

1 2 3 4 5 6 15

102-3 inch micrometer _____2.663_____

Lets Do AnotherLets Do Another

First find “dollars” = 700 First find “dollars” = 700 (don’t use (don’t use decimal point)decimal point)

Next find Quarters = 50 Next find Quarters = 50 (two quarters (two quarters equals 50 cents) equals 50 cents)

Next Find Pennies = 24 Next Find Pennies = 24 ( Pennies are ( Pennies are on the thimble)on the thimble) +__________ +__________

Now Place Decimal Point HereNow Place Decimal Point Here .774 .774

Find the Size of Find the Size of the Micrometer and Place Here the Micrometer and Place Here 0.7740.774 (use smaller of (use smaller of the two numbers)the two numbers)

0 – 1 inch micrometer ____0.774_____

2 3 4 5 6 7 0

20

Dial IndicatorsDial Indicators

Dial IndicatorsDial Indicators Measures movementMeasures movement Measures to the nearest thousandthMeasures to the nearest thousandth Must set to zero and move object to Must set to zero and move object to

it’s stop move the opposite way to it’s stop move the opposite way to read the movement.read the movement.

Bore Gauge-Another type of Dial Micrometer

Dial IndicatorsDial Indicators

Other Measuring ToolsOther Measuring Tools

Height GaugesThread Gauges

Other Measuring ToolsOther Measuring Tools

Hole & Tee Transfer Gauges Squares

Other Measuring ToolsOther Measuring Tools

Vacuum Gauge Compression Tester

Torque Wrenches

Fuel Pressure TesterAntifreeze Tester

Your Job.Your Job. Complete chapter Questions 1-10 Complete chapter Questions 1-10

(review) and 1-5 (ASE-style). Page 51. (review) and 1-5 (ASE-style). Page 51. Also the eight mic readings on page 52 Also the eight mic readings on page 52

Write on a separate paper and write out Write on a separate paper and write out the complete question and your answer. the complete question and your answer. ( do not write the other answer options). ( do not write the other answer options).

Complete the chapter worksheet (I will Complete the chapter worksheet (I will give it out). You may write on it. give it out). You may write on it.

File these items in your note book.File these items in your note book. Notebooks will be graded in the future.Notebooks will be graded in the future.