Vernier Calliper

• Pierre Vernier


  invented vernier caliper
• Vernier caliper was invented in 1631
• 3 measurements of vernier caliper

  1. Outside distance
  2. Inside distance
  3. Depth
• Upper Jaws


  Takes inside measurements (i.e. diameter of a hole)
• Lower Jaws


  Measures outside dimensions
• Depth rod


  Thin rod at the end of the main scale
• Depth rod


  measures depth of holes
• Main scale

  • Measures in centimenters or millimeters
  • Large scale that runs along the body of the vernier caliper
• 1 mm


  Lowest measurement of vernier caliper according to SI units
• Vernier scale

  • Adds extra degree of accuracy
  • Smallest increment on the main scale is further divided
• 1 mm


  Usual measuring range of vernier scale
• Lock screw


  Secures the jaws
• Thumb screw


  Precisely adjust the measuring faces (jaws and depth rod)
• Vernier caliper measures internal and extetnal distances accurately
• Vernier caliper is good for measuring rounded objects
• Lower jaws


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• Thumb screw


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• Depth Rod


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• Vernier Scale


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• Lock Screw


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• Upper Jaws


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• Main Scale


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