Tuesday, April 23, 2019

Precision Measuring Tools (Millwright)

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There are two types of measurement commonly used by millwrights: precision and non-precision. Precision measurement is commonly defined as measurement to within 0.001 inch or 0.02 mm. Non-precision measurement is defined as measurement to within 1/64 inch or 0.5 mm.

Precision measurement involves magnifying very small increments of size to make them visible to your. Until very recently this was done mechanically, using a vernier scale, micrometer screw or geared dial. Electronic means are becoming increasingly popular, ans will probably replace mechanical ones. Each of these mechanisms had its advantages and disadvantages and is discussed in more detail in this module.

Objective One
1. Introduction
2. Vernier, Dial and Digital Calipers
3. Vernier Calipers
4. Dial Calipers
5. Electronic Digital Calipers
6. using Slide Calipers
7. reading an Imperial Vernier Caliper
8. Reading a Metric Verier Caliper
9. Reading a 50 Division Vernier Caliper
10. Height Gauges
11. The Dial Height Gauge
12. The Electronic digital Height Gauge
13. The Vernier Height Gauge
14. Care of Measuring tools
Objective Two
1. Introduction
2. Outside Micrometers
3. Micrometers with Interchangeable Anvils
4. using Precision Measuring Tools
5. Using outside micrometers
6. using Precision Measuring Tools
7. Reading an Imperial Micrometer
8. Reading an imperial Vernier Micrometer
9. Reading a metric Micrometer
10. Inside Micrometers
11. Depth Micrometer
12. Adjusting and Calibrating Micrometer-Type Tools
Objective Three
1. Dial Indicators and Dial Gauges
2. Dial Bore Gauge
3. Crankshaft Defection Gauge
Self-Test Answers

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