Measuring Tools and Systems

Slides:



Advertisements
Similar presentations
Measuring and Testing Instruments
Advertisements

© Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only.
Machining Fundamental
ME: 121 Engineering Practices
Measuring tools Modern engines use thinner casting and require more precise measuring Selectively fit engines All parts are measured and marked according.
Measuring Tools.
Measurement - Length. Digital vs. Analog There are many other types of measuring instruments that measure various other things. There are many other types.
System of Measurement English – standard measurement in the United States, now called U.S. Customary System Uses, inch, foot, yard, rod and mile as units.
Measurement.
Precision Measurement Flexible Manufacturing Copyright © Texas Education Agency, All rights reserved. 1.
New Mexico FFA Agricultural Mechanics Career Development Event Engine Power.
Measurement Systems & Industrial Applications
Using Scientific Measurement
Engine Measuring Vernier (Dial) Caliper Useful because it can read inside and outside measurements. Use only as a “rough” guide. Add the reading on the.
Measuring Tools and Systems
Measurements and Precision Measuring Devices
ME: 121 Engineering Practices
Dimensional Analysis for Meds
Voc. Terms Accuracy Decimal system Metric system Precision
AURT225667A Use and maintain measuring equipment – Part 1
MEASUREMENTS.
Automotive Engines: Theory and Servicing, 6/e By James D Halderman © 2009 Pearson Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ
Using a Ruler to Measure USCS to Metric / SI
Measurements Chapter 4.
Measurement Ch.1.
Common Metric Units and Tools Used to Measure
New Mexico FFA Agricultural Mechanics Career Development Event Engine Power.
BASIC TOOLS & PROCEDURES
Chapter 1 The Nature of Science
Introduction to the Metric System
MEASUREMENT 1.3.
LINEAR MEASUREMENT.
PRECISION MEASURMENT. Vocabulary 1.British imperial (U.S.) Systems 11.) Metric system 12.)inside micrometer 3.Psi 13.)dial caliper 4.Foot- pounds.
Precision Measurement
Measuring Engine Components and Specifications
Precision Measurement. Describing Measurements Accuracy –How close a measurement is to the true value or quantity. Precision –The degree of exactness.
MEASUREMENT. Chapter One: Measurement  1.1 Measurements  1.2 Time and Distance  1.3 Converting Measurements  1.4 Working with Measurements.
Unit A 6-3 Mechanical Systems and Technology. Problem Area 6 Agricultural Power Systems.
Measurement Chapter 4. Scientific study, like cooking, relies on definite measurements. The very word science implies exactness. To obtain meaningful.
INDUSTRIAL TECHNOLOGY-METAL ASSOCIATED THEORY TOPICS
Measuring Systems and Tools 11 Introduction to Automotive Service James Halderman Darrell Deeter © 2013 Pearson Higher Education, Inc. Pearson Prentice.
© 2011 Pearson Education, Inc. All Rights Reserved Automotive Technology, Fifth Edition James Halderman MEASURING SYSTEMS AND TOOLS 12.
Measuring Instruments
Lesson 3 Measurement Tools used in measuring engine components Micrometer caliper – precision measuring tool for taking outside measurements. Inside.
CHAPTER 7 MEASUREING SYSTEMS AND TOOLS
Automotive Engines: Theory and Servicing, 7/e By James D. Halderman Copyright © 2011, 2009, 2005, 2001, 1997 Pearson Education, Inc., Upper Saddle River,
© 2010 Pearson Prentice Hall. All rights reserved Converting Units § 6.4.
Micrometers Unit 9.
1. 2 H. METRICS 1. Metrication Denotes process of changing from English weights and measures to the Metric system. U.S. is only major country not using.
CH 6.4 Measuring Tools.
Precision Measurement
Using Scientific Measurement
MEASURING SYSTEMS AND TOOLS
1 VERNIER CALIPERS 2. USING MEASURING INSTRUMENTS PROPERLY
Chapter 4 Shop Tools.
Automotive Engines Theory and Servicing
Micrometers Unit 9.
Measurement Section 5.
Introduction to the Metric System
FIGURE 7-2 A plastic rule that has both inches and centimeters
Ounces to Grams = Ounces ÷
Unit 2-2 Metric Conversions!.
Section 9.4 Linear Measurements.
Unit 2-2 Metric Conversions!.
Metric –U.S. Customary Comparisons
Automotive Technology Principles, Diagnosis, and Service
Automotive Engines Theory and Servicing
Measuring Systems and Tools
Chapter 6 Measuring.
Turn to page 30 in the Airframe & Power plant Mechanics general handbook.
Presentation transcript:

Measuring Tools and Systems Chapter 6

Objectives Perform measurements using any of the tools in this chapter Have a working understanding of the metric and English systems of measurement

Introduction Automotive technicians must understand British Imperial (U.S.) system Based on inches, feet, and yards Metric system American manufacturers have changed their tooling to the metric system to be competitive Technicians working on domestic automobiles Need to understand both systems

Metric System Known as the international (S.I.) system Measurement of volume is the liter Unit of weight is the gram Metric equivalent to pounds is kilograms Psi and kilograms per square centimeter measure atmospheric pressure at sea level Temperature measured in degrees centigrade Torque readings are expressed in Newton-meters English system: foot-pounds

Metric System (cont'd.) Metric system based on the number ten Very easy system to use 1/100 (0.01) of a meter is a centimeter (cm) 1,000 meters is a kilometer (km) 1/1000 (0.001) of a meter is a millimeter (mm) Convert inches to millimeters Multiply by 25.4 Convert millimeters to inches Divide by 25.4

Measuring Tools Include: Steel rule: used to make approximate measurements Rulers: measure in metric and fractions of one inch Metric ruler: indicates hundredths and thousands of a meter Thickness gauges (i.e., feeler gauges): measure valve clearance, piston ring side clearance, etc. Plastigage: used to measure oil clearance in bearings and oil pumps

Precision Measuring Tools Vernier calliper Developed in the 17th century Movable scale runs parallel to a fixed scale Measures outside diameter (O.D.) and inside diameter (I.D.) Main scale: divided into inches Vernier scale: divides each .025” section on main scale into 25 parts Measurement combines vernier scale and main scale readings

Micrometer Several advantages Reading a micrometer Clear and easy to read Measure consistently and accurately Built-in adjustment to compensate for wear Reading a micrometer One revolution of thimble advances or retracts the spindle 1/40” Each line on the barrel represents 0.025” A new line is uncovered each thimble revolution Some also have a vernier scale

Metric Micrometer Features One turn of thimble turns spindle 0.5 mm Hub graduated in millimeters Thimble has 50 divisions Read in the same manner as English counterpart Vernier scale reads to 0.002 mm Only five divisions

Combination Digital Mikes and Specialty Micrometers Give both metric and English readings LCD readings taken from the digital readout window accurate to 0.0001 Convertible between inch and metric Specialty micrometers Several types Example: ball micrometer

Inside Micrometers Used to measure: Cylinder bores Main and rod bearing bores Thimble does not move as freely on the barrel as the thimble of an outside micrometer Added friction helps keep the reading from changing Use extension rods to make them the proper size Have handles for use in deep cylinders

Telescoping and Split-Ball Gauges Work in cylinders smaller than about two inches Known as transfer gauges Split-ball gauge Used on small holes such as valve guides Telescoping gauges Used with micrometers Measure cylinders, bearing bores, etc.

Dial Indicators Used to measure: Comparison instruments Movements End play of crankshaft Valve guide wear Valve-in-head depth Cylinder and bearing bores Comparison instruments Measurements compared against known measurement