What is Gauge? | Types of Gauges are used in measurement?

What is Gauge? | Types of Gauges are used in MSA?


What is Gauge? 

→ Gauges are the inspection tools without scale which are used to check manufacturing parts.
→ Gauges do not indicate the actual value of the inspected dimension on the parts.
→ They can only be used to determine whether the inspected part has been made within the specified limit.
→ A clear distinction between measuring instruments and gauges is not always observed, at that times Gauges are used largely for measuring work.
→ The gauges are an important part of Measurement System Analysis Study

Types of Gauges are used in measurement?

→ Various Gauges are mentioned below:

Types of Gauges are used in measurement?

➤ (a) Standard Gauges:

→ If the gauge is an exact copy of the mating part of the component to be checked, it is called Standard Gauge
→ Widely used for checking the limit of the dimensions of the part, i.e lower limit and higher limit they are known as "Go" and "No-Go" gauge
→ Examples: Ring gauge, Plug gauge, etc....

➤ (b) Non-Standard Gauges:

→ The gauge has no accurate standard measurement but it is made from some relative reference is called non-standard gauges.
→ Examples: Checking fixture, Temples etc....

Why Gauges are needed?

→ They are needed due to the following reasons:
→ Inter-changeability of parts.
→ Smooth Assembly.
→ Easiness in manufacturing

How to use Gauge?

→ Do not use it as a hammer, this will cause deformation.
→ Avoid any hard/sharp object to come in contact with the gauge, this will cause a dent/scratches on the surface.
→ Do not force it inside the hole to be measured, this will cause fast wear and damage, Let the gauge enter the hole with its own weight.
→ After usage, grease/oil should be applied and kept at a proper place.