Cómo se Lee un Micrómetro en Milímetros

How to Read an Exterior Micrometer in Millimeters

Introduction to the Micrometer

• The video introduces the exterior micrometer, explaining its primary component, which is a screw with a pitch of 0.5 millimeters.

• The graduated drum of the micrometer is divided into 50 equal parts, while the sleeve has two sections: upper and lower.

Understanding Measurements

• The upper part of the sleeve contains 25 divisions representing whole millimeters, with multiples of five marked from 0 to 25.

• A complete turn of the micrometer's screw results in a displacement equal to its pitch (0.5 mm), making each division on the graduated drum equivalent to 0.01 mm.

Reading Measurements

• When returning to zero after a full rotation, one division appears on the lower part of the sleeve indicating an additional measurement of 0.5 mm.

• Continuing another full turn adds another 0.5 mm, leading to readings that can be combined for total measurements.

Example Readings

• An example shows how to read values where both sleeve and drum contribute: if the sleeve reads 0.50 mm and drum reads 0.07 mm, total = 0.57 mm.

• Another example illustrates reading where sleeve shows 0.50 mm and drum shows 0.48 mm for a total of 0.98 mm.

Summary Steps for Measurement

• To measure using a micrometer:

• Count whole millimeter divisions on the upper part first.

• Check for any half-millimeter divisions below that are rightward from zero; add these if present (e.g., +0.50).

• Identify any hundredths from the graduated drum that align with reference lines; sum all values for final measurement.

Practical Examples

• For measuring specific values like "1905" mm:

• Break down as follows: "19" whole millimeters (from sleeve), "00" tenths (none shown), and "05" hundredths from drum.

• Another example involves measuring "158" mm where you identify one whole millimeter from sleeve and check tenths based on rounding rules related to digits greater than or equal to five.

How to Read a Micrometer

Understanding the Measurement Process

• The micrometer reading shows a division of half millimeters to the right of 1, indicating an equivalent measurement of 0.50 millimeters. The subsequent reading from the graduated drum is 8 hundredths of a millimeter (0.08 mm).

• In this section, the digit '7' appears after the decimal point, which is significant because it is greater than or equal to 5. This results in another half-millimeter division being added to the previous measurement, leading to a total of 0.79 mm and an additional reading of 29 hundredths (0.29 mm).

Tips for Effective Learning

• Reading a micrometer in millimeters becomes straightforward with practice; familiarity with the process simplifies future readings.

• Viewers are encouraged to visit "metalmecánica fácil" for more valuable information related to industrial mechanics and metalworking.