NJ304EM High Radial Load Bearings Reliable High Speed Cylindrical Bearings For Machinery

High-precision cylindrical rollers manufactured from premium high-carbon chromium bearing steel through meticulous precision machining. The cylindrical shape enables line contact with raceways, significantly enlarging the contact area for more uniform load distribution, enhanced radial load capacity, and extended service life.

Both inner and outer ring raceways are processed using super-finishing grinding techniques, achieving surface hardness of HRC60-65 for remarkable wear-resistance and fatigue-resistance. Precisely calculated geometric parameters ensure smooth roller movement, minimizing friction coefficient and reducing vibration and noise.

Integral metal-machined cage made of high-strength alloy steel with special heat treatment for enhanced rigidity and toughness. High pocket size accuracy precisely guides and separates cylindrical rollers, preventing collisions and ensuring orderly arrangement during high-speed operation.

Outer ring features double ribs while inner ring has single rib, providing axial load-carrying capacity. This configuration withstands one-way axial forces and performs axial positioning functions for shaft or housing, ensuring stable operation under combined loads.

Proper lubrication is essential for performance and longevity. Select lubricant based on operating conditions (temperature, speed, load). High-temperature extreme-pressure grease recommended for high-load applications. Maintain clean installation area with appropriate grease filling (1/3 to 1/2 of bearing space). Regular inspections and timely lubricant replenishment required.

Establish comprehensive inspection system for early problem detection. Conduct visual inspections for cracks, rust, or abnormal wear. Use vibration sensors and temperature monitors for continuous monitoring. Normal working temperature should not exceed 40°C above ambient temperature. Immediate shutdown required for abnormal vibration or temperature increases.

Maintain clean installation environment to prevent contamination. Use specialized tools (hydraulic presses, installation sleeves) for proper installation. Avoid direct hammering on bearing rings. Ensure precise fit with shaft and housing, controlling interference within specified range to prevent slippage or over-tightening.

Store in dry, well-ventilated areas free from corrosive gases, away from heat sources and high humidity. Place horizontally to avoid deformation from stacking. Use anti-rust paper or plastic film wrapping. Conduct regular storage condition checks to maintain bearing quality.