What is the primary function of feeler gauges?

Feeler gauges are specifically designed to measure small gaps or spaces between surfaces, which makes them essential tools in various mechanical and engineering applications. These gauges consist of a set of metal blades or strips of varying thickness, and they are used to determine the distance of a gap by inserting the appropriate thickness of the feeler gauge into the space. This function is crucial in ensuring proper alignment and adherence to specifications in engine assembly, valve clearance adjustments, and other precision tasks where maintaining specific tolerances is important.

While measuring torque and engine speed are critical aspects of engine diagnostics and maintenance, feeler gauges serve a different purpose entirely, focusing on spatial measurement rather than force or speed. Similarly, indicating movements of components would require tools like dial indicators or other measuring devices tailored for motion, while feeler gauges are strictly for assessing gaps. This precise function of measuring small spaces accurately underscores the importance of feeler gauges in the field of small engine technology and mechanical work.