Alat Ukur Panjang | Jangka Sorong & Mikrometer Skrup

Introduction

This tutorial provides a comprehensive guide on how to use a caliper (jangka sorong) and a screw micrometer (mikrometer skrup) for measuring lengths accurately. These tools are essential in physics and various engineering applications, allowing for precise measurements in both educational and professional settings.

Step 1: Understanding the Caliper

• Definition: A caliper is a measuring tool used to measure the distance between two opposite sides of an object.
• Components:
  • Main Scale: The fixed part of the caliper.
  • Sliding Scale: The movable part that slides along the main scale for measurement.
  • Depth Probe: Used to measure the depth of holes.
  • Inside and Outside Jaws: For measuring internal and external dimensions.

Practical Tips

• Ensure the caliper is calibrated before use.
• Always close the jaws and check the zero reading.

Step 2: Measuring with the Caliper

1. External Measurement:

   • Open the jaws of the caliper.
   • Place the object between the jaws.
   • Gently close the jaws until they touch the object's surface.
   • Read the measurement from the main scale and the sliding scale.

2. Internal Measurement:

   • Use the inside jaws for measuring the internal dimensions of a hollow object.
   • Insert the jaws into the object, then expand until they touch the inner walls.
   • Read the measurement as described above.

3. Depth Measurement:

   • Extend the depth probe into the hole or recess.
   • Make sure the caliper is perpendicular to the base of the hole.
   • Read the measurement.

Common Pitfalls

• Avoid applying excessive force when measuring, as this can lead to inaccurate readings or damage the tool.

Step 3: Understanding the Screw Micrometer

• Definition: A screw micrometer is a precision measuring instrument used for measuring small dimensions with great accuracy.
• Components:
  • Frame: The body of the micrometer.
  • Anvil: The fixed measuring surface.
  • Spindle: The movable measuring surface, adjusted by turning the screw.
  • Thimble: The part you turn to move the spindle.
  • Ratchet: Prevents over-tightening.

Practical Tips

• Ensure the micrometer is clean and free from debris before use.
• Store the micrometer in a protective case to avoid damage.

Step 4: Measuring with the Screw Micrometer

1. Setting the Object:

   • Place the object between the anvil and spindle.
   • Turn the thimble to bring the spindle close to the object without forcing it.

2. Taking the Measurement:

   • Use the ratchet to apply consistent pressure.
   • Read the measurement from the scale on the sleeve and thimble.
   • Combine these readings for the final measurement (e.g., sleeve reading + (thimble reading × smallest division)).

Common Pitfalls

• Do not measure with a micrometer if the object is too large to fit between the anvil and spindle.

Conclusion

By following these steps, you can effectively use a caliper and screw micrometer for accurate measurements. Always remember to check calibration, handle tools gently, and take care of your measuring instruments. With practice, you'll develop precision measurement skills that are invaluable in various fields, including physics and engineering. For further learning, consider exploring more advanced measuring techniques or applications in different scientific domains.