Question

What is the use of Feeler Gauge?

Answer 1

It’s one of the types of gauges. A feeler gauge is a measuring tool for gap widths. In engineering, feeler gauges are typically used to measure the clearance between two pieces. They are made up of several short pieces of steel of various thicknesses, each with measurements marked on it. They're flexible enough that multiple can stack together to measure intermediate values, even if they're all on the same hinge. When it comes to imperial and metric measures, it's typical to have two sets.

Complete answer:
Uses of Feeler Gauge:
They're employed in a
variety of industries,
including aerospace,
automotive,
pharmaceutical,
oil and gas, and
general industrial machining.
Feeler gauges are used in automotive applications to establish the valve clearance between the rocker arms and the valve stem, as well as to regulate the spark plug gap.
A feeler gauge can be used to check the wall slot size in reactor vessels in oil refinery applications.
Feeler gauges are used by tape and film manufacturers to set regular gaps on extruder dies and rollers across the whole length of the die set.

Note:
The blades are usually not hardened. So, when you're measuring a gap, take care not to bend or damage the delicate blades. This will essentially leave that blade worthless, and you will almost always have to replace the complete tool because the plates are not separately replaceable. Another little tip: the plates might sometimes stay together, so make sure you only use one plate at a time.