Lesson Notes By Weeks and Term v4 - SHS 3
Manufacturing tools and equipment
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Manufacturing tools and equipment
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Subject: Manufacturing Engineering
Class: SHS 3
Term: 1st Term
Week: 9
Grade code: 1.3.1.LI.2
Strand code: 3
Sub-strand code: 1
Content standard code: 1.3.1.CS.2
Indicator code: 1.3.1.LI.2
Theme: Manufacturing tools, equipment and processes
Subtheme: Manufacturing tools and equipment
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Good day, future engineers! Today, we are moving beyond using a simple ruler or tape measure. In manufacturing, precision is everything. Imagine a mechanic at Suame Magazine trying to fit a piston into an engine cylinder. If the piston is even a tiny fraction of a millimetre too big or too small, the engine will not work correctly or will be damaged. Likewise, a carpenter at Anloga Junction needs to make sure the joints of a chair are perfectly square, or it will be wobbly and unsafe. This lesson is about the special tools, called gauges, that allow us to measure with the high level of accuracy needed in professional manufacturing.
In manufacturing, we often need to measure things much more accurately than a simple steel rule allows. This is where precision measuring instruments or gauges come in. They help us measure dimensions to fractions of a millimetre. A. The Vernier Caliper
This is one of the most versatile measuring instruments in the workshop. It can be used for three types of measurements: External dimensions (e.g., the diameter of a pipe) using the large outer jaws. Internal dimensions (e.g., the inside diameter of a pipe) using the small inner jaws. Depth (e.g., the depth of a hole) using the depth rod.
Key Parts of a Vernier Caliper: Main Scale: This is the fixed scale, similar to a ruler, marked in millimetres (mm). Vernier Scale: This is the sliding scale that moves along the main scale. It is used to read fractions of a millimetre. External Jaws: Used for measuring outer dimensions. Internal Jaws: Used for measuring inner dimensions. Depth Rod: A thin rod that slides out from the end of the main scale to measure depth. Locking Screw: To lock the sliding jaw in place once a measurement is taken.
How to Read a Vernier Caliper (with 0.02 mm Least Count):