Suitable forautomobiles & motorcycles NTN needle roller bearing NA4826A with high load capacity

Fitness equipment needle roller bearing NA4824A

 Brief  description of needle roller bearing

A needle roller bearing is a bearing which uses small cylindrical rollers. They are used to reduce friction of a rotating surface.

Needle bearings have a large surface area that is in contact with the bearing outer surfaces compared to ball bearings. Additionally there is less added clearance (difference between the diameter of the shaft and the diameter of the bearing) so they are much more compact. The typical structure consists of a needle cage which orients and contains the needle rollers, the needle rollers themselves, and an outer race(sometimes housing itself).

Radial needle bearings are cylindrical and use rollers parallel to the axis of the shaft. Thrust needle bearings are flat and use a radial pattern of needles.

Full complement bearings have solid inner and outer rings and rib-guided cylindrical rollers. Since these bearings have the largest possible number of rolling elements, they have extremely high radial load carrying capacity and are suitable for particularly compact designs.

Needle bearings are heavily used in engine components such as rocker arm pivots, pumps, compressors, and transmissions. The drive shaft of a rear-wheel drive vehicle typically has at least 8 needle bearings (4 in each U joint) and often more if it is particularly long, or operates on steep slopes.

Additional clarification of Needle Roller: According to "Marks' Standard Handbook for Mechanical Engineers", a Needle Bearing is a roller bearing with rollers whose length are at least four times their diameter.

 Needle roller bearings are roller bearings with cylindrical rollers that are small in diameter. In spite of their low cross section, needle roller bearings have a high load carrying capacity and are therefore extremely suitable for bearing arrangements where radial space is limited.

 Needle Roller Bearing Applications

Widely used in automobiles, motorcycles, mopeds, electric tools, textile machinery, agricultural machinery, industrial sewing machines, construction machinery and other fields.

Characteristics of Needle Roller Bearing

Cross-section is small, but very high load capacity, so it is suitable for radial bearing configuration space is limited. Needle roller bearings have a low sectional height and high load capacity.

General purpose needle type bearings to maintain a high speed bearing performance under its outstanding, needle roller shape by a special high rigidity and precision of the cage proper guidance, size error is very low.

Particularly suitable for use in a small space also because they have very high lubricant capacity, light weight and high stiffness characteristics, can in severe cases, use: such as high speed, shock load and other circumstances, the use of a wide range.