This is the Process of Elimination When Identifying Hydraulic Hose Fittings

When working in the industrial industry, particularly in the manufacturing sector, you must handle various types of machinery and the parts that go along with it. There can be a variety of different nuts, bolts, and screws that pertain exclusively to certain parts. The hydraulic system is a perfect example of how complex the work is, as there are many different types of thread forms and sealing methods involved. Thread forms can be particularly difficult as they not immediately distinguishable from one another, thus making it difficult when doing modifications or repairs. To help ease your work, read the article below on how to use the process of elimination to identify a hydraulic hose fitting.

The first step is to determine the type of fitting. There are two types of hydraulic hose fittings: permanent and reusable. The former includes crimped hydraulic fittings and are mostly used in the fluid power industry because they are easier to attach than if you use reusable fittings. To connect a crimped fitting, you will need swaging or crimping materials. These fittings are squeezed onto the hose at assembly and are discarded when the hose assembly fails. With the latter, they are not commonly used as most people in the industry consider them much too old and more expensive. They are, however, easily identifiable because they can fit into a hose during assembly with just the use of a vise and a wrench.

After you’ve identified whether your fitting is permanent or reusable, you next need to identify the port and and connectors in the system. For example, NPT/NPTF can go with the 37° Flare and the BSPT (JIS-PT) goes with the 30° Flare (Metric). Following this, you would next identify the sealing method to determine if the hydraulic fitting is an O-ring, a mated angle or a tapered thread. From this point, you would then need to observe the fitting designs and use a seat gauge to determine seat angle.

The very last step in the process would be to measure the thread diameter of the largest point  with a caliper. Refer to a thread gauge to determine the number of threads per inch. You can ensure an accurate reading when you compare gauge and coupling threads against a lit background.

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