Dimensional Inspection & Measurement Basics

The training is an introduction to some of the most common gages & instruments used on the shop floor, inspection, and quality departments. The purpose is to provide practical instruction on the different tools available and their proper use to build workers’ skill and knowledge.

Target Audience

Anyone involved in any aspect of inspection and providing measurement data should attend – production workers, machine operators, quality control, shipping and receiving, or individuals looking for an overview and hands-on experience using precision held- held instruments.

Course Objectives

This program provides a fundamental and practical review of Basic Dimensional Inspection & Measurement Tools and Methods, including attribute and variable gages such as steel rules, depth and dial gages, micrometers, dial indicators, height gages and calipers. In addition, attribute gages such as plug, ring and screw thread gages are covered.

Benefits

Basic Dimensional Inspection & Measurement Tools and Methods builds a solid foundation of skills that workers can use across a broad spectrum of applications. It forms the basis for mastering more advanced measuring tasks to ensure that you’ll get the most accurate measurements possible. With this program, workers will master the essentials of handling, applying and reading the most common gages on today’s shop floors from steel rules to micrometers, calipers, indicator and height gages.

What good is a measurement result if it has been measured incorrectly? There are many sources of measurement errors that can be easily avoided if we know how to recognize them. We focus on common measurement errors and how to avoid them!

Agenda

Introduction and Key Concepts

Commonly used measurement terminology, concepts, and principles
Units of measurement (UoM)
Metrological traceability and Measurement uncertainty
Accuracy, Precision and Bias
Reference value, Repeatability and Reproducibility
Measurement errors due to bias and how to reduce
Test Accuracy Ratio (TAR) and Test Uncertainty Ratio (TUR)
10:1 and 4:1 rule in measurement
Thermal effects and Coefficient of thermal expansion
Significance of Expertise, Equipment and Environment in obtaining accurate measurements
Evaluating competency and selecting a calibration service provider
Interpreting certificates of calibration of instruments to validate suitability
Estimating calibration frequency of measuring instruments

Fundamentals and Linear Tools

Key terms and concepts
Criteria for accurate measurements
Rules – steel, hook, bevel protractor, basic depth gages
Use of depth gages, inside and outside calipers, dial calipers and electronic calipers

Micrometers and Dial Indicators

Outside, inside, vernier and electronic micrometers
Types of dial indicators
Dial indicating gages – calipers, depth gages

Attribute Gages (Fixed Gages)

Snap gages
Plug gages
Ring gages
Screw thread plug gages
Thread ring gages

Surface Plate Equipment

Surface plate equipment
Gage blocks
Height gages – vernier, dial, electronic
Height master
Surface plate accessories

Miscellaneous Equipment

Surface Roughness Testers/Profilometers
Shape and Profile Measurement
Laser Designed Gaging
Optical Comparators