- Deep Groove Ball Bearings[10]
- Special Bearings[1]
- Pillow Block Bearings[1]
- Rod End Bearings[2]
- Other Hardware[1]
- Taper Roller Bearings[10]
- Spherical Roller Bearings[10]
- Thrust Roller Bearings[3]
- Cylindrical Roller Bearings[10]
- Needle Bearings[10]
- Thrust Ball Bearings[10]
- Self-aligning Ball Bearings[3]
- Angular Contact Ball Bearings[10]
- Auto Bearing[1]
- Other Bearings[1]
- Other Roller Bearings[2]
- Linear Bearings[3]
- Ceramic Ball Bearing[3]
- Contact Person : Ms. tian Nancy
- Company Name : Shandong Xurite Bearing Co., Ltd.
- Tel : 86-531-81609638
- Fax : 86-531-81609637
- Address : Shandong,Jinan,Room 1017-1018,6#tiancheng road,tianqiao district,Jinan China
- Country/Region : China
- Zip : 250000
HK4520 Needle Bearings
Needle bearings
needle bearings have cylindrical roller,which are thin and long relatively to its diameter
Despiter the smaller cross-section,the bearings still have a high load bearing capacity.
Therefore,they aree especially suitable for space restricted radial occasions.
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 an inner race (or sometimes merely a shaft), a needle cage which orients and contains the needle rollers, the needle rollers themselves, and an outer race.
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.
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.
HK4520 Needle Bearings
