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

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

1) 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.

1) 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....

3) Why Gauges are needed?

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



4) 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.