The definition of needle roller bearings is a bearing that utilizes small cylindrical rollers. The purpose of the rollers is to reduce the friction of a rotating surface.
In comparison to ball bearings, needle bearings have a larger surface area that comes in contact with the bearing raceway journals.
The needle roller bearing has many benefits when compared to other types of bearings. They have a higher load capacity in comparison to other roller bearings of comparable single-row ball or OD. Needle roller bearing offers good rolling characteristics in a small cross-section. It is cheaper than other kinds of bearings.
Needle bearings have lower inertia forces which are able to facilitate size and weight reductions in machinery. They also have greater rigidity.
More benefits to needle bearings are their ability to withstand oscillation, perform well when put under severe conditions, and are interchangeable with sliding bearings.
There are a number of different types of needle bearings that are available in a great variety of sizes and tolerances, for a wide variety of applications.
Needle roller and cage assemblies are available in single or double row, split or solid cage, inch, and metric sizes along with connecting rod bearings for special applications. One type is single and double row bearings. These are available with ribs or without and with or without inner rings.
Also, it appears in single row roller and cage assemblies are thrust bearings. There are yoke and stud type track rollers available too.
Needle bearings have applications in the automobile industry. There are some automobile components such as pumps, rock arm pivots, transmissions, and compressors.
There are at least eight needle roller bearings in the drive shaft of a rear-wheel-drive automobile. If people design the vehicle to operate on steep slopes of if it is longer than usual.
Needle bearings have a history of more than 70 years. During these 70 years, the basic design of the bearing has not changed much but SUNBEARING introduces advanced developments that have resulted in new cage designs to better its service life considerably.