Measuring Tools and Systems

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Measuring Tools and Systems

• Chapter 5
• Page 40

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Measuring Systems U.S.

• U.S.
• Length miles, feet, inches, fractions of an
  inch, tenths, hundredths, thousandths, ten
  thousandths, and decimals.
• Pressure pounds per square inch (p.s.i.) vacuum
  (inches of mercury)
• Weight pounds
• Liquids gallons, quarts, pints, and ounces,
  cubic inches
• Temperature Fahrenheit
• Torque Foot pounds

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Measuring Systems Metric

• Metric
• Length kilometers, meters, centimeters,
  millimeters
• Pressure Kilograms per square centimeter
• Weight kilograms, grams,
• Liquids Liters, cubic centimeters
• Temperature Celsius
• Torque Newton Meters

4
Measuring Tools

• Ruler/Tape Measure

5
Feeler Gauges and Wire Gauges
6
Safety Check

• Never use feeler gauges on operating machinery.
• Feeler gauges are strips of hardened metal that
  have been ground or rolled to a precise
  thickness. They can be very thin and will cut
  through skin if not handled correctly.

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Points to Note

• There are many types of feeler gauges, each with
  a specific application.
• Feeler gauges usually come in sets with a number
  of blades. The thickness of each blade is marked
  in thousandths of an inch and hundredths of a
  millimeter. A marking of 0.040 indicates the
  feeler is 40 thousandths of an inch thick. It may
  also indicate a measurement of 1.02 millimeters.
  A feeler marked 0.005 indicates the thickness is
  5 thousandths of an inch. It may also indicate
  0.12 millimeters.

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• Some sets contain feelers made of brass. These
  are to take measurements between magnetic
  components.
• When measuring a spark plug gap, it is preferable
  to use wire feeler gauges. These feelers use
  accurately machined pieces of wire instead of
  metal strips.
• If the feeler gauge feels too loose when
  measuring a gap, select the next size larger and
  measure the gap again. Repeat this procedure
  until the feeler gauge fits snugly in the gap. If
  the feeler gauge is too tight, select a smaller
  size until the feeler gauge fits snugly in the
  gap.

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Feeler Gauges
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Vernier Calipers
Picture from pg 42
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Calipers

• Outside Measurement- Measure outside diameters of
  an object. (Ex. Camshaft)
• Inside Measurement- Measure inside diameters of
  an object. (Ex. Cylinder bore)
• Depth Measurement-Measure depth of an object.
  (Ex. Bolt hole depth)

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Micrometers
Digital Mic
U.S Metric
Inside Mic
Bore Gauge
Depth Gauge
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Micrometers

• Very accurate
• Measures to the nearest ten thousandth
• Very Fragile
• Tricky to use
• Easy to use after you learn how

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Micrometers
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How to Read the Micrometer

• First find dollars 600 (dont use
  decimal point)
• Next find Quarters 50 (two quarters
  equals 50 cents)
• Next Find Pennies 13 ( Pennies are
  on the thimble)
  __________
• Now Place Decimal Point Here .663
• Find the Size of the Micrometer and Place Here
  2.663 (use smaller of the two numbers)

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Lets Do Another

• First find dollars 700 (dont use
  decimal point)
• Next find Quarters 50 (two quarters
  equals 50 cents)
• Next Find Pennies 24 ( Pennies are
  on the thimble)
  __________
• Now Place Decimal Point Here .774
• Find the Size of the Micrometer and Place Here
  0.774 (use smaller of the two numbers)

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Dial Indicators
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Dial Indicators

• Measures movement
• Measures to the nearest thousandth
• Must set to zero and move object to its stop
  move the opposite way to read the movement.

Bore Gauge- Another type of Dial Micrometer
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Dial Indicators
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Other Measuring Tools
Thread Gauges
Height Gauges
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Other Measuring Tools
Hole Tee Transfer Gauges
Squares
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Other Measuring Tools
Vacuum Gauge
Compression Tester
Torque Wrenches
Antifreeze Tester
Fuel Pressure Tester
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Your Job.

• Complete chapter Questions 1-10 (review) and 1-5
  (ASE-style). Page 51. Also the eight mic readings
  on page 52
• Write on a separate paper and write out the
  complete question and your answer. ( do not write
  the other answer options).
• Complete the chapter worksheet (I will give it
  out). You may write on it.
• File these items in your note book.
• Notebooks will be graded in the future.