Koyo NA4920 Needle Roller Bearing, Precision Ground, Steel Cage, Open End, Oil Hole, Metric, 100mm ID, 140mm OD, 40mm Width

This Koyo radial needle roller bearing has a steel cage and an oil hole, and is suitable for applications with high dynamic and static loads. It has an inner ring to provide a hardened and ground roller raceway for applications in which the shaft cannot be used as a raceway. The steel cage provides guidance and even spacing of the rollers for reduced friction, vibration, and noise when operated at high speeds. The needle rollers are made of through-hardened, high-carbon chromium steel for durability and heat tolerance, and the outer ring has a lubrication groove and an oil hole for applying lubrication in place.

• Radial needle roller bearing for applications with high dynamic and static loads
• Inner ring provides a hardened and ground raceway for applications where the shaft cannot be used
• Steel cage guides and evenly spaces rollers for reduced friction, vibration, and noise
• Through-hardened, high-carbon chromium steel rollers for heat tolerance and durability under heavy loads
• Lubrication groove and oil hole for applying lubrication in place