flat cage IKO Needle Roller Bearing RNA49/28 NA49/28 NA4928
Product Name |
Needle Roller Bearing |
Material |
Chrome steel (GCR15) |
Precision Grade |
ABEC-1,ABEC-3,ABEC-5,P0,P6,P5,P4,P2
|
Clearance |
C2,C0,C3,C4 |
Cage |
Steel Cage, Nylon Cage |
Voice Grade |
Z1,Z2,Z3,Z4 |
Vibration Grade |
V1,V2,V3,V4 |
Grease |
High Quality Grease |
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.
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 compliment 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.