The NJ 305 E is a cylindrical roller bearing from the NJ 305 E series, designed to handle high radial loads and moderate axial loads in one direction. Here’s a detailed breakdown of its specifications:
NJ 305 E Bearing Specifications:
Type: Single-row cylindrical roller bearing with NJ design (one integral flanged outer ring and one flangeless inner ring).
ISO Standard: Complies with ISO 15:2017 (metric rolling bearings).
Bore Diameter (d): 25 Mm (305 series = 25 mm bore).
Outer Diameter (D): 62 Mm.
Szerokość (B): 17 Mm.
Dynamic Load Rating (C): ~30.5 Kn (varies by manufacturer).
Static Load Rating (C₀): ~22.0 Kn.
Speed Rating (Grease/Oil): ~10,000 / 13,000 rpm (approx., depends on lubrication).
Cage Material: Typically stamped steel or machined brass (varies by manufacturer).
Suffix “E”: Indicates reinforced (high-capacity) roller design with optimized internal geometry for higher load capacity compared to standard NJ 305.
Key Features:
Axial Displacement: The NJ design allows axial displacement of the shaft relative to the housing, making it suitable for locating/non-locating bearing arrangements.
High Radial Load Capacity: Handles heavy radial loads efficiently.
Moderate Thrust Load Capacity: Can support axial loads in one direction (due to one-sided flange).
Precision & Durability: The “E” suffix indicates improved internal geometry for better performance.
Common Applications:
Electric motors & gearboxes
Industrial machinery (pumps, compressors)
Automotive transmissions
Conveyor systems
Machine tool spindles (when paired with another bearing)
Equivalent Bearings:
NJ 305 EM (with machined brass cage)
NJ 305 ECP (with polymer cage)
NJ 305 ECM (optimized for high speeds)
NUP 305 E (if axial load support in both directions is needed)
Manufacturers & Availability:
Firma SKF, FAG/INA, Krajowa Organizacja Bezpieczeństwa (NS, NTN, TIMKEN produce this bearing.
Check interchangeability if replacing with non-“E” variants.
Would you like assistance with installation, lubrication, or bearing selection for a specific application?
