Basic Measurement Skills Training System
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This MasterTask program trains an employee in the use of basic measuring instruments and in the reading comprehension of shop print terms and symbols. In addition, the program provides a diagnostic test to determine the employee's basic skill in measurement, arithmetic, and the ability to visualize a part from the drawing on a shop print.

Designed as an introductory program, "Basic Measurement Skills" will provide the entry level skills for many of the other MasterTask Training Programs. The testing procedures will document the entry level skills of the beginning operator and enable management to make a decision on the ability of an employee to successfully complete common measurement tasks required of machinists. Click here to learn more about the manuals and course design provided.

This program will not teach arithmetic or geometry. The basic functioning level of the employee should include addition and subtraction of whole numbers and decimals as well as multiplication and division. If the diagnostic testing included in this program indicates that an employee does not have these skills, remedial education should be the first step towards the individual's training.

LESSON 1: READING THOUSANDTHS WITH THE MICROMETER

The trainee will be able to read and write measurements in the machine tool industry identifying the following:

The Thousandths Place

"Tenths" Place of a Thousandth

The Decimal Point

Whole Inch Numbers

Tenths of an Inch in Thousandths

Hundredths of an Inch in Thousandths

Thousandths of an Inch

Ten Thousandths of an Inch

The trainee will be able to identify and explain the purpose for the following components and scales on a micrometer:

Inch Size

Anvil

Spindle

Thimble

Frame

Lock

Baseline

Friction Knob

Large Gradations

Small Gradations

Thimble Lines

Vernier Scale

Barrel

Zero Line

The trainee will be able to perform the following measurement tasks:

1. Check the micrometer for accuracy.

2. Hold the micrometer in the palm of the hand.

3. Fit the micrometer to diameters.

4. Fit the micrometer to irregular shapes.

5. Find the true diameter.

6. Fit with proper tension using a friction knob.

7. Fit with proper tension without a friction knob.

8. Identify the large, small, complete spaces before the edge of the thimble.

9. Identify the thousandths line on the thimble.

10. Identify the tenths line on the vernier.

11. Write out the steps and add.

LESSON 2: READING THE SHOP PRINT FOR MEASUREMENTS AND TOLERANCES

The trainee will be able to identify the following elements on a shop print:

Sectional Drawing

Schematic Drawings

Nominal Dimension

Lower Tolerance

Fractional Dimensions

Magnified Detail

Extension Lines

Concentricity Tolerance

Total Indicator Reading

Side View

Half Section

Center Line

Runout

End View

Surface Finish

Dimension Lines

Upper Tolerance

Abbreviations:

DIA

RIA

OD

ID

TIR

TYP

CFR

The trainee will be able to perform the following measurement tasks:

1. Identify tolerance range.

2. Find decimal equivalent by division.

3. Find decimal equivalent on chart.

4. Identify scale increments on rule.

5. Hold rule parallel to dimension.

6. Read from whole inch mark.

7. Read without parallax.

8. Read large scale gradations in smallest increment.

9. Write out the steps and add.

10. Find missing dimensions on shop prints.

LESSON 3: CALIPERS, GAUGES, AND THREADS

The trainee will be able to identify and explain the purpose for the following components and scales on dial or vernier calipers, thread micrometers, or GO/NO-GO gauges:

Caliper Jaws

Caliper Blades

Thread Anvil and Spindle

Threads Per Inch Range

Hundred Thousandths Gradation

Twenty-five Thousandths Gradation

Depth Rods

Caliper Beam

Dial Indicator

Vernier Scale

The trainee will be able to identify the following elements of thread notation:

Standard Abbreviation

Nominal Size

Threads Per Inch

Class of Fit

The trainee will be able to perform the following measurement tasks:

1. Fit calipers to workpiece.

2. Find true diameter.

3. Read only complete spaces.

4. Read dial indicator.

5. Read vernier scale.

6. Identify vernier zero as end point.

7. Write out and add the steps of a caliper measurement.

8. Gauge outside diameters.

9. Gauge for straightness and tapers.

10. Gauge inside diameters.

11. Gauge threads.

12. Fit pitch micrometer to threads.

13. Select threads per inch range.

14. Write out and add the reading steps of a pitch diameter.

LESSON 4: MEASURING LENGTHS, RADIUS, AND ANGLE WITH THE OPTICAL COMPARATOR

The trainee will be able to identify and explain the purpose for the following components, controls, and scales on the Optical Comparator:

X Axis Direction Switch

Y Axis Direction Switch

Power of Magnification

End Measuring Bars

Vertical Measurement Dial

Selector Switch/Binder Knob

One-Minute Vernier Scale

Five-Minute Vernier Scale

Table-Helix Degree Scale

Micrometer Thimble

Micrometer Spindle

Projection Screen

Adjustable Anvil

Reference Line

Lens

Table

OFF/ON

LED Readout

Reset Button

Holding Device

Power Switch

Focus Knob

Chart Gauge

Chart Clips

Chart Ring

Center Line

Tolerance Zone

Reflection Light