FEELER GAUGES

A feeler gauge is a tool used to measure the gap between two objects. It is most commonly used in engineering to measure the clearance between two parts. Feeler gauges are typically sold as a set of thin metal strips or blades, each with a different thickness with measurements marked on each piece .They are flexible enough that even if they are all on the same hinge, several can be stacked together to gauge intermediate values.

Feeler gauges are a very simple tool but play an important role in ensuring that machines operate correctly. Here are some of the common uses for feeler gauges:

• Valve clearances in engines: The clearance between the valves and the rocker arms in an engine is critical for proper engine operation. Feeler gauges are used to measure this clearance and ensure it is within the manufacturer’s specifications.
• Spark plug gaps: The gap between the spark plug electrodes is also important for proper engine operation. Feeler gauges are used to measure this gap and ensure it is within the manufacturer’s specifications.
• Bearing clearances: The clearance between a shaft and a bearing is important for minimizing friction and wear. Feeler gauges are used to measure this clearance and ensure it is within the manufacturer’s specifications.
• Body panel gaps: Body panel gaps on vehicles should be consistent for a good cosmetic appearance. Feeler gauges can be used to measure these gaps and ensure they are uniform.

Feeler gauges typically come in two different types of sets: metric and imperial. Metric feeler gauges will have measurements in millimeters and centimeters, while imperial feeler gauges will have measurements in inches and thousandths of an inch. When using a feeler gauge, it is important to select the blade that is closest to, but slightly smaller than, the gap you are trying to measure. The blade should slide smoothly into the gap with a slight drag. If the blade goes into the gap too easily, it is too thin. If the blade will not go into the gap at all, it is too thick.