7.3.13 Vernier Height Gauges

Question 1

What is a vernier height gauge?

Answer 1

A vernier height gauge has a vertical beam scale fixed to a flat base and is usually used on a surface plate or a marking out table.

Question 2

What is the primary use of a vernier height gauge?

Answer 2

It is used for measuring absolute height above the datum surface and for measuring differences in height between different parts of the item.

Question 3

What is a common application of a height gauge?

Answer 3

The height gauge is frequently used for making accurate markings on components.

Question 4

How is accurate marking achieved with a height gauge?

Answer 4

A finger with a sharp ground edge is used for marking.

Question 5

What scales do vernier height gauges typically have?

Answer 5

Vernier height gauges are often dual scale instruments with both millimetre and inch scales.

Question 6

What must be ensured when using a vernier height gauge?

Answer 6

The base of the height gauge, the surface table, and the workpiece must always be kept perfectly clean.

Question 7

What should be done with the height gauge after use?

Answer 7

When finished, the height gauge must be carefully returned to proper storage.

Question 8

How can a vernier height gauge measure the underside of a feature?

Answer 8

The finger must be reversed to measure the underside of a feature on the component.

Question 9

What additional allowance must be added when measuring to the underside?

Answer 9

An allowance equal to the height of the finger arm plus twice the height of the finger (X + 2Y mm) must be added to the scale reading.