Koyo NKJ28/30A Needle Roller Bearing, Removable Inner Ring, Open, Normal Clearance, Oil Hole, Steel Cage, Metric, 28mm ID, 42mm OD, 30mm Width, 14000rpm Maximum Rotational Speed

This Koyo radial needle roller bearing has a removable inner ring and a nylon cage, and is suitable for applications with high dynamic and static loads. The inner ring provides a hardened and ground roller raceway for applications in which the shaft cannot be used as a raceway. The glass fiber reinforced polymer cage provides guidance and even spacing of the rollers for minimum vibration and noise when operated at high speeds, and the outer ring has a lubrication groove and an oil hole for applying lubrication in place. The needle rollers are made of through-hardened, high-carbon chromium steel for durability and heat tolerance, and have contoured ends to optimize the distribution of contact stress. This radial needle roller bearing meets Deutsches Institut für Normung standard DIN 617 and International Organization for Standardization standard ISO 1206 for quality assurance, and is used in various applications, such as automotive and truck transmissions, agricultural and construction equipment, pumps and compressors, and two-cycle engines, among others.Roller bearings use rolling elements to maintain a separation between moving parts to reduce rotational friction and support radial and axial loads. These elements can be one of the following types: ball, cylindrical, spherical, barrel, needle, spindle, or tapered. Roller bearings can be open on both ends (a shaft can pass through) or open on one end and closed on the other. An open end can be sealed or shielded to protect the bearing from solid contaminants and moisture that could reduce its lifespan. If an end is sealed, the sealing component is an elastomer lip that contacts the shaft. If it is shielded, the shielding is a non-contact lip, usually made of metal. Rolling bearings are used in a range of applications from agricultural machinery to conveying equipment, robotics, dental equipment, elevators, rolling mills, ship rudder shafts, and aggregate crushers, among others.Koyo Bearings USA manufactures needle roller bearings, bearing assemblies, and needle rollers for automotive and industrial applications. The company, founded in 2009, is headquartered in Canton, OH, and meets International Organization for Standardization (ISO) standards 14001 and TS 16949 for quality assurance.

• 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
• Reinforced polyamide nylon 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