What is Gauge and Types of Gauges in MSA ?

What is Gauge and Types of Gauges in MSA?

 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:

→ Various Gauges are mentioned below:
What is Gauge and Types of Gauges in MSA

➤ (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, Slip 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....

2) Gauges are needed due to the following reasons:

 Inter-changeability of parts.
 Smooth Assembly.
 Easiness in manufacturing

3) Handling of Gauges:

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

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