What tool is typically used to check the crosshead shoe clearance on a reciprocating compressor?

The feeler gauge is specifically designed for measuring gaps and clearances between components, making it the ideal tool for checking crosshead shoe clearance in a reciprocating compressor. This clearance is critical for the efficient operation of the compressor, as it ensures proper fit and function of moving parts.

Feeler gauges consist of a series of thin metal blades of varying thickness, which can be inserted into the clearance space to accurately determine the measurement. This precision is essential in applications like reciprocating compressors, where even slight variations in clearance can have significant effects on performance and reliability.

The other tools mentioned do not serve the same purpose. A caliper measures external and internal dimensions but is not suited for checking small clearances effectively. A micrometer provides precise measurements as well, but it is used more for measuring thickness or diameter rather than gaps between components. A tape measure is generally employed for larger measurements and would not provide the level of precision needed for checking clearances in machinery like a compressor.