CARA MEMBACA JANGKA SORONG | KETELITIAN 0.05 mm | VERNIER CALIPER

Introduction

This tutorial provides a step-by-step guide on how to read a Vernier caliper, also known as a jangka sorong. With a precision of 0.05 mm, this tool is essential for accurate measurements in various fields such as engineering, woodworking, and metalworking. Understanding how to properly use and read a Vernier caliper can enhance your measuring skills and improve the quality of your work.

Step 1: Familiarize Yourself with the Vernier Caliper

• Parts of the Vernier Caliper:

  • Main Scale: The fixed scale that measures the main length.
  • Vernier Scale: The sliding scale that provides additional precision.
  • Depth Gauge: A small rod used to measure the depth of holes.
  • Inside Jaws: Used for measuring internal dimensions.
  • Outside Jaws: Used for measuring external dimensions.

• Understanding the Scale:

  • The main scale is typically measured in millimeters.
  • The Vernier scale allows for more precise measurements, often showing values in increments of 0.05 mm.

Step 2: Taking Measurements

• Measuring External Dimensions:

  1. Open the jaws of the caliper and place them around the object to be measured.
  2. Close the jaws gently until they touch the object without applying excessive force.
  3. Read the measurement from the main scale where the zero of the Vernier scale aligns with the main scale.

• Measuring Internal Dimensions:

  1. Use the inside jaws of the caliper.
  2. Insert the jaws into the opening of the object.
  3. Close the jaws until they touch the inner walls and read the measurement as described in the previous step.

• Measuring Depth:

  1. Extend the depth gauge into the hole or recess of the object.
  2. Ensure it touches the bottom of the hole.
  3. Read the measurement similarly on the main scale.

Step 3: Interpreting the Vernier Scale

1. Find the Main Scale Reading:

   • Identify the last whole number on the main scale before the zero of the Vernier scale.

2. Find the Vernier Scale Reading:

   • Look for the line on the Vernier scale that aligns perfectly with any line on the main scale. This gives you the additional decimal value.

3. Calculate Total Measurement:

   • Combine the main scale reading and the Vernier scale reading to get the final measurement. For example:
     • Main Scale: 10 mm
     • Vernier Scale: 0.05 mm
     • Total Measurement = 10 mm + 0.05 mm = 10.05 mm

Step 4: Common Pitfalls to Avoid

• Forgetting to Zero: Always check that the caliper reads zero when closed. If not, adjust accordingly.
• Applying Too Much Pressure: Avoid pressing too hard on the object as it may lead to inaccurate measurements.
• Not Reading at Eye Level: Ensure you're looking straight at the scale to avoid parallax errors.

Conclusion

Reading a Vernier caliper is a valuable skill that enhances measurement accuracy. By familiarizing yourself with its parts, knowing how to take various measurements, and correctly interpreting the scales, you can achieve precise results. Practice regularly to become proficient, and consider using this tool for projects that require detailed measurements. For further learning, explore related tools like micrometers or digital calipers.