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Hydraulic Banjo Fittings – Complete Guide and Where to Buy Them

NPT, JIC, BSP, Metric — these are the most popular hydraulic fitting types available in the market. However, one relatively less popular hydraulic fitting type, with notable advantages, is the hydraulic banjo fitting.

In this post, we look at an overview of hydraulic banjo fittings. So, read on to know more about the fittings, how to identify them, when you should use them, and their advantages.

What are Hydraulic Banjo Fittings?

Hydraulic Banjo Fittings

Hydraulic banjo fittings take their name from the musical instrument — banjo — due to their shape. They are exclusive hydraulic fittings manufactured to work with hollow screws.

As a result, they have a hollowed long end, which attaches to the hydraulic hose or tube. Also, the long end is round and open, just enough to fit in a hollow screw.

The hollow screw has a hole through which the hydraulic fluid flows. But when tightened to the hydraulic system, the hole in the hollow screw aligns with the fitting’s open round end. This setup causes the hydraulic fluid to flow through the entire assembly.

Hydraulic banjo fittings are available in various sizes and types. In particular, they come in different thread standard sizes, such as metric, BSPP, BSPT, and NPT.

But most you will find are BSPP, BSPT, and metric, since the fittings are more prevalent in European and Asian systems. They are not primary in hydraulic applications in the US or North America in general.

It’s important to note that hydraulic banjo fittings are also available as adapters. For example, you will find banjo to male JIC adapters, adjustable banjo adapters to metric thread, and throttle-free or full passage banjo adapters.

These hydraulic fittings may not be prominent in the market, but they are not unpopular. There are some specific applications where you just must use hydraulic banjo fittings.

Applications of Banjo Fittings

Generally, hydraulic banjo fittings are best suited for high-pressure applications: up to 1,000 PSI at least. The reason for this, in particular, is that the fittings allow a two-way flow path between the external ports of the bolt and the union.

Also, when assembled, banjo fittings allow a hydraulic hose to rotate 360 degrees. So, you should use them in hydraulic systems that require frequent hose bending and twisting.

Of course, there are other hydraulic fitting types that handle high-pressure and support hose bending and twisting. The difference with banjo fittings, however, is that they have a relatively lower profile. Low profile here refers to fittings’ appearance and size — larger width and a smaller diameter.

In everyday life, the most common place you’ll find banjo fittings is in mechanical systems of tractors, motorcycles and other engine systems.

Identification and Sizing of Banjo Fittings

banjo fitting bolt

The easiest way to identify banjo fittings is from their design. As stated earlier, they appear like the banjo musical instrument — featuring a thin pipe connected to a large circular section — from where they get their name.

With this alone, it’s impossible to mistake banjo fittings. However, identification transcends appearance, and size is also important. Hydraulic banjo fittings usually range from 6 mm to 42 mm in outer diameter with ⅛ inch to 2 inches fitting ends.

Typically, the outer diameter will tell you the standard the banjo fitting follows — BSPP, metric, NPT. You should expect BSPP and metric thread sizes since they are the most common.

Furthermore, consider the production material. Since banjo fittings are famous for handling high pressure, they usually come in steel materials. Notably carbon steel and stainless steel. However, some are made with brass.

Benefits of Using Banjo Fittings

Banjo fitting application

The number one advantage of banjo fittings is that they work optimally in high-pressure applications. A banjo fitting, particularly the type with a welded nipple, will handle pressure up to 9,000 PSI.

In addition, banjo fittings are perfect for hydraulic hoses that need to bend and rotate frequently. The most interesting fact is that the fittings don’t rotate with the hoses or host fitting.

As a result, it’s unlikely that they will incur damages from the bending and rotation, unlike many other fitting types. Thanks to these pros, banjo fittings are versatile and useful in different industries.

How To Measure Banjo Fittings?

How you measure hydraulic banjo fittings is not different from how you measure standard bolts. The outer diameter is the main focus, and for the measurement, you’ll need a set of calipers.

All you have to do is tighten the calipers over the fitting’s threads. The threads should be parallel to the caliper’s jaws and measuring tips for an accurate reading. When in place, record the measurement.

The above method will work for both male and female banjo fitting connectors. For the male, you measure the outer diameter, and for the female, you measure the inner diameter.

Manufacturer of Hydraulic Banjo Fittings in China

To conclude, hydraulic banjo fittings have many advantages due to their ability to withstand high pressure, bending, and rotation. Also, they are easy to identify due to their unique shape.

Since these fittings are relatively less popular, finding the best quality in the market may be challenging. But, not to worry, you can count on us at Sinopulse to supply you with reliable hydraulic banjo fittings and other fitting types. We are a certified hydraulic banjo fitting manufacturer with a standard factory that is more than capable of meeting all your requests. Get in touch with us today!

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