1. LINEAR MEASUREMENT Allows for Mass Production
& for Interchangeable Parts

2. TYPES OF MEASUREMENT SYSTEMS
Metric System: standard for linear measurement is the Meter
English System: linear measurement is divided into fractions
Decimal: linear measurement is divided into thousands of an inch

3. What is Linear Measurement?
That which can be expressed as a length in fractional decimal or metric system
Usually in the form of a straight line
Perimeter is a form of linear measurement
Is pounds? Is gallons? Is electric current?

4. Measurement Terminology
Actual Size: The measured size of a part.
Basic Size: The size from which limits of size are derived.
Limits of Size: The maximum and minimum permissible variation of a size
Tolerance: The total permissible variation of a size.
Fit: The range of tightness between two mating parts.
Clearance fit:: Provides clearance between mating parts

5. Terminology cont.
Interference fit: provides interference between mating parts
Allowance : Intentional difference between the material size limits of mating parts

6. TYPES OF RULES Flexible Rules Steel Rules
Hook Rule -blind holes, grooves.
Slide calipers
Combination square