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Measuring Tools and Systems

Measuring Tools and Systems. Chapter 5 Page 40. 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

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Measuring Tools and Systems

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  1. Measuring Tools and Systems Chapter 5 Page 40

  2. 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

  3. 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.

  7. 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.

  8. 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.

  9. Feeler Gauges

  10. Vernier Calipers Picture from pg 42

  11. 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)

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

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

  14. Micrometers

  15. 15 1 2 3 4 5 6 10 2-3 inch micrometer _____2.663_____ How to Read the Micrometer First find “dollars” = 600 (don’t 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)

  16. 2 3 4 5 6 7 0 20 0 – 1 inch micrometer ____0.774_____ Lets Do Another First find “dollars” = 700 (don’t 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)

  17. Dial Indicators

  18. Dial Indicators • Measures movement • Measures to the nearest thousandth • Must set to zero and move object to it’s stop move the opposite way to read the movement. Bore Gauge- Another type of Dial Micrometer

  19. Dial Indicators

  20. Other Measuring Tools Thread Gauges Height Gauges

  21. Other Measuring Tools Hole & Tee Transfer Gauges Squares

  22. Other Measuring Tools Vacuum Gauge Compression Tester Torque Wrenches Antifreeze Tester Fuel Pressure Tester

  23. 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.

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