# Measuring Tools and Systems

Document Sample

```					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
 Liquids= gallons, quarts, pints, and ounces, cubic
inches
 Temperature= Fahrenheit
 Torque= Foot pounds
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
Measuring Tools
   Ruler/Tape Measure
Feeler Gauges and Wire Gauges
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.
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
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.
   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.
Feeler Gauges
Vernier Calipers

Picture from pg 42
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)
Micrometers
Digital Mic

U.S & Metric

Inside Mic

Bore Gauge

Depth Gauge
Micrometers
   Very accurate
   Measures to the nearest ten thousandth
   Very Fragile
   Tricky to use
   Easy to use after you learn how
Micrometers

1      2      3        4     5     6        15

10
2-3 inch micrometer    _____2.663_____

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)
Lets Do Another

2     3     4     5     6    7        0

20
0 – 1 inch micrometer ____0.774_____

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)
Dial Indicators
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
Dial Indicators
Other Measuring Tools

Other Measuring Tools

Hole & Tee Transfer Gauges   Squares
Other Measuring Tools

Vacuum Gauge                            Compression Tester

Torque Wrenches

Antifreeze Tester
Fuel Pressure Tester
   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