Understanding JIC & JIS Hydraulic Fittings

 Welcome to our newsletter about JIC and JIS hydraulic fittings! In this guide, we will explore everything you need to know about these two types of fittings, including their uses, benefits, and differences. Whether you’re a professional in the hydraulic industry or just getting started, this guide will provide you with valuable insights and information.

 

Section 1: What Are JIC Fittings?

The Joint Industry Council (JIC) fitting has a long history in the hydraulic industry. It was first developed in the early 20th century to standardize hydraulic fittings used in the aircraft industry. At the time, there were many different types of hydraulic fittings in use, making it difficult to maintain and repair hydraulic systems. JIC fittings are characterized by their 37-degree flare angle, which creates a strong and reliable seal between the fitting and the hydraulic hose or tubing. This flare angle is designed to minimize leakages and provide a secure connection even under high pressure.

 

Interlock JIC Hydraulic Hose Fittings


Section 2: What Are JIS Fittings?

JIS (Japanese Industrial Standard) fittings are a type of hydraulic fitting commonly used in Japan and other Asian countries. Like JIC fittings, JIS fittings are used to connect hydraulic hoses and tubes in various applications, including industrial machinery, construction equipment, and agricultural machinery. JIS fittings are characterized by their 30-degree flare angle, slightly different from the 37-degree flare angle used in JIC fittings. This flare angle creates a reliable seal between the fitting and the hydraulic hose or tube, helping to prevent leaks under pressure.

 

JIS fittings come in a range of sizes, from small diameters used in low-pressure systems to larger sizes for high-pressure applications. They are often made of steel or brass and can be either male or female fittings.

 

Section 3: Differences Between JIC and JIS Hydraulic Fittings

JIC (Joint Industry Council) and JIS (Japanese Industrial Standard) fittings are two distinct types of hydraulic fittings, each with its own unique characteristics and uses. Here are some of the key differences between these two types of fittings:

 

- Flare Angle: The most significant difference between JIC and JIS fittings is the flare angle. JIC fittings have a 37-degree flare angle, while JIS fittings have a 30-degree flare angle. This difference in angle affects the way the fittings seal and connect to the hydraulic hose fittings.

 

- Thread Type: JIC fittings typically have Unified National Fine (UNF) threads, while JIS fittings have metric threads. This means that JIC fittings may require different tools and adapters compared to JIS fittings when installing or repairing hydraulic systems.

 

- Standards: JIC fittings are governed by SAE (Society of Automotive Engineers) standards, whereas JIS fittings are governed by Japanese Industrial Standards. As a result, the specifications and performance standards for JIC and JIS fittings may differ slightly.

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