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NTN NJ 308 +HJ 309 bearing

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NTN NJ 308 +HJ 309 Bearing Details:
Bearing NameNJ 308 +HJ 309
New ModelNJ2211+HJ2211
Old Model62511 bearing
product ModelNJ2211+HJ2211
CategoryCylindrical Roller Bearings
BrandNTN Bearing
Inner Diameter d ( mm ) 55
Outer Diameter D ( mm )100
Thickness B ( mm )25
NTN NJ 308 +HJ 309 Bearing   Bearing Size and Drawing:
NJ 308 +HJ 309
NTN NJ 308 +HJ 309 Bearing With size alternative model
ModelInner Diameter
d(mm)
Outer Diameter
D(mm)
thickness
B(mm)
BrandType
NACHI NJ2211E+HJ2211E Bearing5510025NACHICylindrical Roller Bearings
TORRINGTON 22211CCK/W33 Bearing5510025TORRINGTONSpherical Roller Bearings
NSK 22211 CC/W33 Bearing5510025NSKSpherical Roller Bearings
NSK NSK2211ETN9 Bearing5510025NSKSelf-aligning Ball Bearings
ZKL NU2211 Bearing5510025ZKLCylindrical Roller Bearings
FAG 2211K.2RS.TV.C3 Bearing5510025FAGSelf-aligning Ball Bearings
NTN N 2211 Bearing5510025NTNCylindrical Roller Bearings
NSK NUP2211 Bearing5510025NSKCylindrical Roller Bearings
bearings 22211 CW33 Bearing5510025bearings
NACHI NU2211 Bearing5510025NACHICylindrical Roller Bearings

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What are the structural components and design advantages of cylindrical roller bearings?
 
Cylindrical roller bearings consist of an inner ring, an outer ring, cylindrical rollers, and a cage (some models have full complement rollers or no inner or outer rings). The rollers and raceways are designed for line contact, offering advantages such as extremely high radial load capacity, good rigidity, low coefficient of friction, high limiting speed, and the ability to allow a certain degree of axial displacement of the shaft relative to the housing bore.
 
What are the advantages of cylindrical roller bearings compared to other similar bearings?
 
Compared to deep groove ball bearings, cylindrical roller bearings have significantly higher radial load capacity, making them more suitable for heavy-duty applications. Compared to tapered roller bearings, they have higher limiting speeds, lower frictional heat generation, and simplify system design when not subjected to axial loads. Compared to needle roller bearings, they offer superior rigidity and shock resistance, making them suitable for applications requiring higher stability.
 
What are the applicable occasions and typical applications of cylindrical roller bearings?
 
These bearings are suitable for heavy-duty, high-speed machinery requiring rigid support. Typical applications include large motors, machine tool spindles, gearboxes, rolling mills, industrial pumps, papermaking machinery, and mining crushing equipment.

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