150mm Vernier Calliper

The vernier calliper is used to give a direct reading of the distance measured with high accuracy and precision.

There are two different vernier callipers available in the Tork Craft range:

• Analog vernier callipers
• Digital vernier callipers

Using an analog vernier calliper:

• To measure outer dimensions of an item, the item is placed within the external jaws, which are then moved together until against the object
• To measure inner dimensions of an item, the internal jaws are placed within the opening, which are then spread open until against the object
• To measure the depth of an opening, the depth rod is placed in the opening, which are then slid down until it touches the bottom of the opening
• Read the main scale where it lines up with the sliding scale's zero
• The main scale on a Vernier calliper typically tells you the whole number plus the first decimal
• Read this just as you would a ruler, measuring to the zero mark on the sliding (Vernier) scale
• The digits remaining are taken from the vernier scale and placed after the decimal point of the basic reading
• This remaining reading corresponds to the mark that is lined up with any main scale mark (or division)
• Only one division line of the vernier scale should match with one on the main scale

Safety Tips:

• Make sure the workpiece being measured is clean and has no burrs on the edges
• When measuring a workpiece in a lathe, ensure that the lathe is switched off before measuring
• Keep precision measuring tools away from magnetic objects