Datum Precedence and Degrees of Freedom
By Janet Braun
Datum precedence is a fundamental principle in the design and manufacture of mechanical parts and assemblies.
It refers to the order of importance assigned to different datums, which are specific points, lines, or planes on a part, which are used as references for measurement and geometric tolerances.
Affinity Diagram
In this module, we’ll explore what an affinity diagram is, discuss how it can be used to solve problems, and end with some real-world applications to show you how these can help you in any manufacturing role to bring order to chaos.
Total Surface Area of a Cylinder
By Kevin Ritzman
In this module, you will see the derivation of the total surface area formula for a cylinder and work through several application problems.
How to Read a Caliper
By Barbara Anderegg
In this interactive object, learners review how to read a caliper. They then test their skills with eight practice questions.
Metrology - Area of Circles and Volume of Cylinders
In this module we will explore some commonly used formulas for area and volume.
Reading Indicator Quiz
In this learning activity you'll test your skill at reading indicators.
Calibrating a Depth Micrometer (Screencast)
In this learning activity you'll review the steps for calibrating the length of depth micrometer measuring rods.
Practical Trigonometry (Screencast)
After a brief review, the student solves five practical shop problems using right angle trigonometry.
Reading Vernier Height Gage Quiz
Students take a 13-question quiz to practice reading 25- and 50-division Vernier height gages.
Units of Measurement
In this learning activity you'll explore units of measurement.
Gage Blocks
In this learning activity you'll explore the history behind gage blocks.
Everyone Knows How to Use a Ruler, Right?
Students review the best practices for using a ruler and answer five basic questions.
Using an Indicator
By Janet Braun, Barbara Anderegg
Students read about the basics of using an indicator.
Gage Block Combinations Review
By Kelly Curran, Janet Braun
In this learning activity you'll test your ability to select the proper gage blocks when making a stack.
Using Gage Blocks: Discussion and Quiz
In this learning activity you'll identify the consequences of using gage blocks incorrectly.
Surface Finish
Learners review surface finish basics and read how to calculate the roughness average.
The Dial Caliper
Learners review guidelines for the proper use of a dial caliper. Illustrations appear throughout the learning object.
Steel Rules Test
By Kelly Curran
In this learning activity you'll test your knowledge of the different types of steel rules as well as how to use and read them correctly.
Measurement Madness
By Wisc-Online
Test your skills at reading a ruler.
Optical Comparator: Establishing a Reference Frame on the Starrett HB 400
In this interactive learning object, learners read how to compensate for a part not mounted perfectly parallel to the machine axis.
Optical Comparator: Setting Up the Edge Detector on the Starrett HB 400
Students read how to set up the optical comparator edge detector in this interactive learning object.
Chordal Distances
Students review how to use chordal distances to locate bolt hole circle locations. They then take a 10-question quiz to test their knowledge.
Surface Finish Quiz
Students take a quiz to test their knowledge of surface finish.
Sine Bar Quiz
In this learning activity you'll calculate sine bar problems.
Sine Bar
In this learning activity you'll examine how a sine bar is used to measure angles.