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NU2306EM High Speed Cylindrical Roller Bearings For Industrial Motor / Machinery
NU2306EM Cylindrical Roller Bearing is engineered to meet the exacting demands of diverse industrial applications. This precision component combines advanced design with reliable functionality, making it essential for contemporary machinery operations.
Design and Structure
Inner Ring and Outer Ring: The inner ring features a smooth surface finish designed for a precise 30mm shaft fit, ensuring efficient power transmission and minimal slippage. The outer ring (72mm diameter, 27mm width) withstands significant radial loads while balancing space constraints.
The unique design features an inner ring without flanges and an outer ring with two flanges, allowing axial displacement compensation—ideal for shafts subject to thermal expansion or misalignment.
Rolling Elements and Cage: Precision-crafted cylindrical rollers made from high-quality bearing steel achieve surface roughness below Ra0.1μm, reducing friction and enhancing energy efficiency. The brass (CuZn37) cage maintains proper roller spacing and provides excellent thermal conductivity for heat dissipation.
Sealing Structure (Optional): Available with contact-type nitrile rubber seals for dusty/humid environments or non-contact labyrinth seals for high-speed applications (up to 5000rpm).
Key Parameters
Parameter
Value
Inner Diameter (d)
30mm
Outer Diameter (D)
72mm
Width (B)
27mm
Performance Advantages
High Radial Load Capacity: Basic dynamic load rating of 54.5kN and static load rating of 62.5kN for heavy-duty applications
Axial Displacement Accommodation: Compensates for thermal expansion and shaft misalignment
Low Friction & High-Speed Capability: Friction coefficient as low as 0.002 with limiting speeds of 4500rpm (grease) and 6000rpm (oil)
Excellent Wear Resistance: GCr15 steel heat-treated to HRC60-65 hardness with enhanced surface treatment
Material Quality
Rings and Rollers: High-purity GCr15 bearing steel processed with vacuum degassing for excellent density and mechanical properties. Impact toughness exceeds 10J/cm² for enhanced fatigue resistance.
Cage Material: Brass (CuZn37) provides outstanding thermal conductivity and mechanical strength for stable performance in high-speed, high-load applications.
Application Fields
Industrial Machinery: Drive shafts in lathes, conveyor system rollers and pulleys
Electric Motors: Small to medium power range motors requiring radial force handling and thermal expansion compensation
Automotive Industry: Water pumps in internal combustion engines operating in challenging environments
Installation and Maintenance
Installation: Use hydraulic press or bearing installer for proper fit. Avoid misalignment and component damage. For tapered shafts, use locking nut for position adjustment and pre-load.
Lubrication: Lithium-based grease recommended for general applications (fill 1/3 to 1/2 internal space). For high-speed/high-temperature use, ISO VG 32 or 46 lubricating oil with forced-feed systems (0.1-0.3MPa pressure).
Maintenance: Monitor bearing temperature (should not exceed 70°C). Investigate abnormal vibration or noise promptly. Use bearing puller for careful disassembly without damaging components.
Conclusion
The NU2306EM cylindrical roller bearing combines high-strength construction, excellent axial displacement accommodation, and broad adaptability to different operating conditions. Its reliable performance under heavy radial loads, axial movement challenges, and demanding environments makes it an essential component in modern mechanical engineering across multiple industries.
Introduction:1.Covering an area of 80 mu (about 53,333 square meters), our factory has a 60-person team including 4 professional engineers, ensuring stable production and technical support.
2. Focusing on bearing production for 25 years, quality is our only guarantee3. Wafangdian Bearing Factory was... Introduction:1.Covering an area of 80 mu (about 53,333 square meters), our factory has a 60-person team including 4 professional engineers, ensuring stable production and technical support.
2. Focusing on bearing production for 25 years, quality is our only guarantee3. Wafangdian Bearing Factory was...
