A Zerk fitting, a rotary joint, Zerk fitting, sleeve fitting, or sleeve jointing is a metal coupling used in ball bearing assemblies to feed oils, usually grease, from a lower nipple to a higher one with a rotary screw. Rotary jointing is the most widely used application for a Zerk fitting. Rotary jointing is also commonly called a grease joint or ball jointing and the industry refers to them as either rotary jointed or ball joints. The benefit of a rotary joint is that the lubricant oil does not accumulate on the inside of the bearing shell. This allows greater bearing life because there is less friction caused by lubricant leaks.
There are many different types of a rotary fitting including: bipolar fitting (with a notch in the male part to force a female spring-loaded component), cap-and-body fitting (a threaded cap with a female inner sleeve and a ball or plate mounted on the male side), cap-and-hood fitting (the cap and the threads of the female side form a loop), and screw-type fitting (a cap with a screw thread on the inside of the male shell and a female spring-loaded component on top). Cap-and-hood is one of the oldest types of Zerk fitting and is still used today because it is easy to install. Most of the modern caps-and-hood fit with ease with the exception of the cap-and-body, which needs to be prepped by drilling a hole in the bottom of the male shell. Since this type of fitting has no lubricant leak and the parts are readily available and easily ordered, cap-and-hood is widely used because it meets the demands of the manufacturing process without compromising lubricant storage or availability. As a result of its widespread use, this type of fitting is now obsolete and should be replaced with a new type of mating.
Another important characteristic of a lubrication-free and reusable type of bearing is that it is easy to install and remove. Unlike the cap-and-body fitting that needs to be drilled into the bottom part of the threaded shaft and installed, the grease fitting inserts a cone-shaped sleeve into the oil seal between the bearing and the engine block. If you have any inquiries about where by and how to use learn here, you can get hold of us at our own web-site. This type of lubrication-free grease nipple also has a high degree of compatibility with threaded parts. With the installation of a grease nipple on the maintenance of an engine is greatly reduced.
There are other types of alemite fitting which have superior characteristics. One of these is a metal nipple. This type of alemite fitting is also called a cap-and-hood fitting or a cap-and-body fitting and is often used on cylinder valves or cylinders in an internal combustion engine. A metal nipple is made of an alloy that contains titanium or aluminum. With the introduction of aluminum the weight and the strength of this type of apron could be increased. Furthermore, the performance of this type of apron was made more consistent by the introduction of a larger port hole.