Transcript Measurement - Two Rivers Public School District

MEASUREMENT
MEASURING TOOLS
• RULER
• DIAL CALIPER
• VERNIER CALIPER
• OUTSIDE MICROMETER
• DEPTH MICROMETER
• INSIDE MICROMETER
• INDIRECT MEASUREMENT
• HEIGHT GUAGE
• INIDICATORS
Systems of Measurement
• US Conventional System- inches, feet, yards
• Fractional Notation
• Decimal Notation
• Reading a Ruler (review page 70 Modern Metalworking)
• International System of Units (SI)- SI metric
• Millimeters/ Half millimeters
• Reading a Ruler (review page 71 Modern Metalworking)
Ruler
• Graduations
• Fractional Inch
(1/8”-1/64”)
• Decimal Inch
(10th, 20th, 50th)
• Metric
(millimeters and
half millimeters)
Combination Square
Rulers
Dial Calipers
Bezal Lock, Caliper Dial, Clamp Screw, Fixed Jaw,
Scale Beam, Movable Jaw, Inside Nib.
The Dial Caliper
How to Read a Caliper
Vernier Calipers
• More accurate than dial calipers
Vernier Measurement Review
Outside Micrometer
Reading a Micrometer
Depth Measurement
• Used to accurately measure the depth of a hole or bore.
Depth Measurement
Inside Micrometer
• Used to accurately measure bores or hole diameter
Inside Micrometer
Indirect Measurement
Height Gage
• Types
• Digital, Dial, or Vernier
• Supported by Surface Plates and
Machine Tables
Indicators
• Used for “quick checking” parts and
• Types
• Balanced- can be read in both directions
line
• Continuous- read clockwise from “0” line
• Digital
machine setups
from the “0”
Using an Indicator
Test Your Knowledge
•
•
•
•
What is the graduation of this ruler?
When is a magnifying glass needed?
Why should you begin readings at the 1”?
Identify the highlighted marks.
7.
.217
8.
.272