Key Specifications:
Bore (d): 60 mm
Outer Diameter (D): 130 mm
Width (B): 31 mm
Internal Clearance: Often C3 (greater than normal) in many FAG supply versions
Cage Type: brass cage or steel cage depending on variant
Bearing Series / Designation: NJ312-E / NJ312-E-XL / NJ312-E-TVP2 etc. depending on performance upgrade
Dynamic / Static Load Ratings: ~ 177 kN dynamic, ~ 157 kN static for an example version (NJ312-E-M1-C3)
Features & Benefits:
Axial Load Support (One Direction): The NJ design ensures the bearing can absorb axial forces in one direction while handling radial loads.
High Rigidity: The roller-to-race contact area is large, offering good stiffness.
Separable Design: The inner ring + roller + cage assembly can be separated from the outer ring, easing mounting and maintenance.
Variants for Enhanced Performance: FAG offers enhanced versions (E, XL, TVP2, etc.) for improved load capacity, temperature limits, or cage strength.
Good for Moderate Speeds: While optimized for radial loads, it supports reasonable rotational speed depending on lubrication and operating conditions.
Common Applications:
Gearboxes & transmissions
Machine tools & spindles
Pumps & compressors
Industrial drives & heavy machinery
Axial indexing or guiding in one direction applications
The FAG NJ 312 is a single-row cylindrical roller bearing designed to support radial loads and axial loads in one direction. The NJ-type configuration has flanges on both sides of the outer ring and one flange on the inner ring, providing axial guidance for the shaft in one direction.
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